appendage

.gitignore

@@ -151,3 +151,6 @@ compile_commands.json
 CTestTestfile.cmake
 *.dump
 
+.vscode/c_cpp_properties.json
+semihosting_test/build/semihosting_test
+semihosting_test/build/Makefile

.gitmodules

@@ -1,7 +1,6 @@
-[submodule "cm"]
-        path = benchmarks/coremark/cm
-	url = https://github.com/eembc/coremark.git
-
 [submodule "benchmarks/coremark/cm"]
 	path = benchmarks/coremark/cm
 	url = https://github.com/eembc/coremark.git
+[submodule "bare-metal-bsp"]
+	path = bare-metal-bsp
+	url = https://git.minres.com/Firmware/MNRS-BM-BSP.git

CMakeLists.txt

@@ -4,15 +4,8 @@ endif()
 if (NOT DEFINED ISA)
 	set(ISA imc)
 endif()
-add_custom_target(fw-hello-world ALL 
-	COMMAND make -C ${riscvfw_SOURCE_DIR}/hello-world BOARD=${BOARD} ISA=${ISA}
-	USES_TERMINAL
-	WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
-add_custom_target(fw-dhrystone ALL 
-	COMMAND make -C ${riscvfw_SOURCE_DIR}/benchmarks/dhrystone BOARD=${BOARD} ISA=${ISA}
-    USES_TERMINAL
-    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
-add_custom_target(fw-coremark ALL 
-	COMMAND make -C ${riscvfw_SOURCE_DIR}/benchmarks/coremark/cm PORT_DIR=../tgc BOARD=${BOARD} ISA=${ISA}
+message(STATUS "Building firmware using ${BOARD} board configuration and isa ${ISA}")
+add_custom_target(fw-common ALL 
+	COMMAND make -C hello-world BOARD=${BOARD} ISA=${ISA} && make -C benchmarks/dhrystone BOARD=${BOARD} ISA=${ISA} && make -C benchmarks/coremark BOARD=${BOARD} ISA=${ISA}
     USES_TERMINAL
     WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})

Jenkinsfile

@@ -0,0 +1,81 @@
+void checkout_project() {
+    checkout([
+        $class: 'GitSCM',
+        branches: [
+            [name: '*/main']
+        ],
+        extensions: [
+            [$class: 'CleanBeforeCheckout'],
+            [$class: 'SubmoduleOption', disableSubmodules: false, parentCredentials: true, recursiveSubmodules: true, reference: '', trackingSubmodules: false]
+        ],
+        submoduleCfg: [],
+        userRemoteConfigs: [
+            [credentialsId: 'gitea-jenkins', url: 'https://git.minres.com/Firmware/Firmwares.git']
+        ]
+    ])
+}
+
+void checkout_develop() {
+    dir("bare-metal-bsp") {
+        withCredentials([usernamePassword(credentialsId: 'gitea-jenkins', usernameVariable: 'GIT_USERNAME', passwordVariable: 'GIT_PASSWORD')]) {
+            sh ("git pull origin develop")
+        }
+    }
+    //sh("cd bare-metal-bsp && git checkout develop")
+}
+
+void make_hello(board) {
+    sh("make -C hello-world/ BOARD=${board}")
+    sh("make -C hello-world/ clean")
+}
+
+pipeline {
+    agent { docker { 
+        image 'ubuntu-riscv'
+        args '-v $HOME/.m2:/root/.m2'
+    }}
+    options {
+        // using the Timestamper plugin we can add timestamps to the console log
+        timestamps()
+        skipStagesAfterUnstable()
+    }
+    stages {
+        /*stage('checkout repo') { steps{ checkout_project()}}
+        stage('checkout develop') { steps{ checkout_develop()}}
+        stage('make iss') {steps { make_hello("iss")}}
+        stage('make hifive1') {steps { make_hello("hifive1")}}
+        stage('make TGC5L') {steps { make_hello("TGC5L")}}
+        stage('make rtl') {steps { make_hello("rtl")}}
+        stage('make ehrenberg') {steps { make_hello("ehrenberg")}}
+        stage('make tgc_vp') {steps { make_hello("tgc_vp")}}*/
+        stage('make hello-world') {
+            matrix {
+                axes {
+                    axis{
+                        name 'BOARD'
+                        values 'iss', 'hifive1', 'TGCP', 'ehrenberg', 'rtl', 'tgc_vp'
+                    }
+                }
+                stages {
+                    stage('Force sequential') {
+                        options {
+                            lock("One Board at a time")
+                        }
+                        stages {
+                            stage("make") {
+                                steps {
+                                    make_hello("${BOARD}")
+                                }
+                            }
+                        }
+                    }
+                }
+            } 
+        }
+    }
+    post {
+        failure {
+            sh("make -C hello-world/ clean")       
+        }
+    }
+}

README.md

@@ -1,2 +1,25 @@
-# Firmware
+# MINRES Firmware Repository
+## Structure
+This repository comes with several executables ready to be built, such as `hello-world` or `coremark` and `dhrystone` in the `benchmark` directory.
+Creating the executables in the easiest way possible is done by calling `make`in the corresponding directory.
 
+## Prerequisite
+This repository requires `riscv64-unknown-elf-gcc` to be located in `$PATH`.
+
+## How to Use
+When compiling executables, the target platform needs to be specified using the 'BOARD' variable. When compiling for the TGC5C for example, use  `make BOARD=tgc_vp`, when compiling for RTL `make BOARD=rtl`. The default value for the Board variable is 'iss'.
+The arch can be set with the 'ISA' variable, the default value is 'imc'.
+
+When compiling for the TGC5A VP for example, the call to create the correct binary is the following:
+```
+make BOARD=tgc_vp ISA=e
+```
+## Useful information
+Using `bear -- <build-command>` will cause a compile_commands.json to be emitted. This allows using completion tools like clangd. 
+
+## Current Limitations
+Currently, this repository only supports creation of 32-bit executables (Even when setting the `RISCV_ARCH` and `RISCV_ABI` manually).
+
+Compiling for the 'e' extension / ISA together with any other extension (`ISA=emc` for example), requires setting the `RISCV_ABI=ilp32e` explicitly. 
+
+When switching ABI or ARCH ensure that object files in the corresponding 'env' dir in the 'bare-metal-bsp' submodule are removed, so they get created with the appropriate flags (namely the 'init.o' file).

bare-metal-bsp

@@ -0,0 +1 @@
+Subproject commit 87dc0ec2304adcb94a25b397a357aadae1304867

bare-metal-bsp/drivers/clic/clic_driver.c

@@ -1,163 +0,0 @@
-// See LICENSE for license details.
-
-#include "sifive/devices/clic.h"
-#include "clic/clic_driver.h"
-#include "platform.h"
-#include "encoding.h"
-#include <string.h>
-
-
-void volatile_memzero(uint8_t * base, unsigned int size) {
-  volatile uint8_t * ptr;
-  for (ptr = base; ptr < (base + size); ptr++){
-    *ptr = 0;
-  }
-}
-
-// Note that there are no assertions or bounds checking on these
-// parameter values.
-void clic_init (
-                clic_instance_t * this_clic,
-                uintptr_t hart_addr,
-                interrupt_function_ptr_t* vect_table,
-                interrupt_function_ptr_t default_handler,
-                uint32_t num_irq,
-                uint32_t num_config_bits
-                )
-{
-  this_clic->hart_addr=  hart_addr;
-  this_clic->vect_table= vect_table;
-  this_clic->num_config_bits= num_config_bits;
-
-  //initialize vector table
-  for(int i=0;i++;i<num_irq)  {
-    this_clic->vect_table[i] = default_handler;
-  }
-
-  //set base vectors
-  write_csr(mtvt, vect_table);
-
-
-  //clear all interrupt enables and pending
-  volatile_memzero((uint8_t*)(this_clic->hart_addr+CLIC_INTIE), num_irq);
-  volatile_memzero((uint8_t*)(this_clic->hart_addr+CLIC_INTIP), num_irq);
-
-  //clear nlbits and nvbits; all interrupts trap to level 15
-  *(volatile uint8_t*)(this_clic->hart_addr+CLIC_CFG)=0;
-
-}
-
-void clic_install_handler (clic_instance_t * this_clic, uint32_t source, interrupt_function_ptr_t handler) {
-    this_clic->vect_table[source] = handler;
-}
-
-void clic_enable_interrupt (clic_instance_t * this_clic, uint32_t source) {
-    *(volatile uint8_t*)(this_clic->hart_addr+CLIC_INTIE+source) = 1;
-}
-
-void clic_disable_interrupt (clic_instance_t * this_clic, uint32_t source){
-  *(volatile uint8_t*)(this_clic->hart_addr+CLIC_INTIE+source) = 0;
-}
-
-void clic_set_pending(clic_instance_t * this_clic, uint32_t source){
-  *(volatile uint8_t*)(this_clic->hart_addr+CLIC_INTIP+source) = 1;
-}
-
-void clic_clear_pending(clic_instance_t * this_clic, uint32_t source){
-  *(volatile uint8_t*)(this_clic->hart_addr+CLIC_INTIP+source) = 0;
-}
-
-void clic_set_intcfg (clic_instance_t * this_clic, uint32_t source, uint32_t intcfg){
-  *(volatile uint8_t*)(this_clic->hart_addr+CLIC_INTCFG+source) = intcfg;
-}
-
-uint8_t clic_get_intcfg  (clic_instance_t * this_clic, uint32_t source){
-  return *(volatile uint8_t*)(this_clic->hart_addr+CLIC_INTCFG+source);
-}
-
-void clic_set_cliccfg (clic_instance_t * this_clic, uint32_t cfg){
-  *(volatile uint8_t*)(this_clic->hart_addr+CLIC_CFG) = cfg;
-}
-
-uint8_t clic_get_cliccfg  (clic_instance_t * this_clic){
-  return *(volatile uint8_t*)(this_clic->hart_addr+CLIC_CFG);
-}
-
-//sets an interrupt level based encoding of nmbits, nlbits
-uint8_t clic_set_int_level( clic_instance_t * this_clic, uint32_t source, uint8_t level) {
-  //extract nlbits
-  uint8_t nlbits = clic_get_cliccfg(this_clic);
-  nlbits = (nlbits >>1) & 0x7;
-
-  //shift level right to mask off unused bits
-  level = level>>((this_clic->num_config_bits)-nlbits); //plus this_clic->nmbits which is always 0 for now.
-  //shift level into correct bit position
-  level = level << (8-this_clic->num_config_bits) + (this_clic->num_config_bits - nlbits);
- 
-  //write to clicintcfg
-  uint8_t current_intcfg = clic_get_intcfg(this_clic, source);
-  clic_set_intcfg(this_clic, source, (current_intcfg | level));
-
-  return level;
-}
-
-//gets an interrupt level based encoding of nmbits, nlbits
-uint8_t clic_get_int_level( clic_instance_t * this_clic, uint32_t source) {
-  uint8_t level;
-  level = clic_get_intcfg(this_clic, source);
-
-  //extract nlbits
-  uint8_t nlbits = clic_get_cliccfg(this_clic);
-  nlbits = (nlbits >>1) & 0x7;
-
-  //shift level
-  level = level >> (8-(this_clic->num_config_bits));
-
-  //shift level right to mask off priority bits
-  level = level>>(this_clic->num_config_bits-nlbits); //this_clic->nmbits which is always 0 for now.
-
-  return level;
-}
-
-//sets an interrupt priority based encoding of nmbits, nlbits
-uint8_t clic_set_int_priority( clic_instance_t * this_clic, uint32_t source, uint8_t priority) {
-  //priority bits = num_config_bits - nlbits
-  //extract nlbits
-  uint8_t nlbits = clic_get_cliccfg(this_clic);
-  nlbits = (nlbits >>1) & 0x7;
-
-  uint8_t priority_bits = this_clic->num_config_bits-nlbits;
-  if(priority_bits = 0) {
-    //no bits to set
-    return 0;
-  }
-  //mask off unused bits
-  priority = priority >> (8-priority_bits);
-  //shift into the correct bit position
-  priority = priority << (8-(this_clic->num_config_bits));
-
-  //write to clicintcfg
-  uint8_t current_intcfg = clic_get_intcfg(this_clic, source);
-  clic_set_intcfg(this_clic, source, (current_intcfg | priority));
-  return current_intcfg;
-}
-
-//gets an interrupt priority based encoding of nmbits, nlbits
-uint8_t clic_get_int_priority( clic_instance_t * this_clic, uint32_t source) {
-  uint8_t priority;
-  priority = clic_get_intcfg(this_clic, source);
-
-  //extract nlbits
-  uint8_t nlbits = clic_get_cliccfg(this_clic);
-  nlbits = (nlbits >>1) & 0x7;
-
-  //shift left to mask off level bits
-  priority = priority << nlbits;
-
-  //shift priority
-  priority = priority >> (8-((this_clic->num_config_bits)+nlbits));
-
- return priority;
-}
-
-

bare-metal-bsp/drivers/clic/clic_driver.h

@@ -1,44 +0,0 @@
-// See LICENSE file for licence details
-
-#ifndef PLIC_DRIVER_H
-#define PLIC_DRIVER_H
-
-
-__BEGIN_DECLS
-
-#include "platform.h"
-
-typedef void (*interrupt_function_ptr_t) (void);
-
-typedef struct __clic_instance_t
-{
-  uintptr_t hart_addr;
-  interrupt_function_ptr_t* vect_table;
-  uint32_t num_config_bits;
-  uint32_t num_sources;  
-} clic_instance_t;
-
-// Note that there are no assertions or bounds checking on these
-// parameter values.
-void clic_init (clic_instance_t * this_clic, uintptr_t hart_addr, interrupt_function_ptr_t* vect_table, interrupt_function_ptr_t default_handler, uint32_t num_irq,uint32_t num_config_bits);
-void clic_install_handler (clic_instance_t * this_clic, uint32_t source, interrupt_function_ptr_t handler);
-void clic_enable_interrupt (clic_instance_t * this_clic, uint32_t source);
-void clic_disable_interrupt (clic_instance_t * this_clic, uint32_t source);
-void clic_set_pending(clic_instance_t * this_clic, uint32_t source);
-void clic_clear_pending(clic_instance_t * this_clic, uint32_t source);
-void clic_set_intcfg (clic_instance_t * this_clic, uint32_t source, uint32_t intcfg);
-uint8_t clic_get_intcfg (clic_instance_t * this_clic, uint32_t source);
-void clic_set_cliccfg (clic_instance_t * this_clic, uint32_t cfg);
-uint8_t clic_get_cliccfg  (clic_instance_t * this_clic);
-//sets an interrupt level based encoding of nmbits, nlbits
-uint8_t clic_set_int_level( clic_instance_t * this_clic, uint32_t source, uint8_t level);
-//get an interrupt level based encoding of nmbits, nlbits
-uint8_t clic_get_int_level( clic_instance_t * this_clic, uint32_t source);
-//sets an interrupt priority based encoding of nmbits, nlbits
-uint8_t clic_set_int_priority( clic_instance_t * this_clic, uint32_t source, uint8_t priority);
-//sets an interrupt priority based encoding of nmbits, nlbits
-uint8_t clic_get_int_priority( clic_instance_t * this_clic, uint32_t source);
-
-__END_DECLS
-
-#endif

bare-metal-bsp/drivers/fe300prci/fe300prci_driver.c

@@ -1,252 +0,0 @@
-// See LICENSE file for license details
-
-#include "platform.h"
-
-#ifdef PRCI_BASE_ADDR
-#include "fe300prci/fe300prci_driver.h"
-#include <unistd.h>
-
-#define rdmcycle(x)  {				       \
-    uint32_t lo, hi, hi2;			       \
-    __asm__ __volatile__ ("1:\n\t"		       \
-			  "csrr %0, mcycleh\n\t"       \
-			  "csrr %1, mcycle\n\t"	       \
-			  "csrr %2, mcycleh\n\t"		\
-			  "bne  %0, %2, 1b\n\t"			\
-			  : "=r" (hi), "=r" (lo), "=r" (hi2)) ;	\
-    *(x) = lo | ((uint64_t) hi << 32); 				\
-  }
-
-uint32_t PRCI_measure_mcycle_freq(uint32_t mtime_ticks, uint32_t mtime_freq)
-{
-
-  uint32_t start_mtime = CLINT_REG(CLINT_MTIME);
-  uint32_t end_mtime = start_mtime + mtime_ticks + 1;
-
-  // Make sure we won't get rollover.
-  while (end_mtime < start_mtime){
-    start_mtime = CLINT_REG(CLINT_MTIME);
-    end_mtime = start_mtime + mtime_ticks + 1;
-  }
-
-  // Don't start measuring until mtime edge.
-  uint32_t tmp = start_mtime;
-  do {
-    start_mtime = CLINT_REG(CLINT_MTIME);
-  } while (start_mtime == tmp);
-  
-  uint64_t start_mcycle;
-  rdmcycle(&start_mcycle);
-  
-  while (CLINT_REG(CLINT_MTIME) < end_mtime) ;
-  
-  uint64_t end_mcycle;
-  rdmcycle(&end_mcycle);
-  uint32_t difference = (uint32_t) (end_mcycle - start_mcycle);
-
-  uint64_t freq = ((uint64_t) difference * mtime_freq) / mtime_ticks;
-  return (uint32_t) freq & 0xFFFFFFFF;
-  
-}
- 
-
-void PRCI_use_hfrosc(int div, int trim)
-{
-  // Make sure the HFROSC is running at its default setting
-  // It is OK to change this even if we are running off of it.
-  
-  PRCI_REG(PRCI_HFROSCCFG) = (ROSC_DIV(div) | ROSC_TRIM(trim) | ROSC_EN(1));
-
-  while ((PRCI_REG(PRCI_HFROSCCFG) & ROSC_RDY(1)) == 0);
-  
-  PRCI_REG(PRCI_PLLCFG) &= ~PLL_SEL(1);
-}
-
-void PRCI_use_pll(int refsel, int bypass,
-			 int r, int f, int q, int finaldiv,
-			 int hfroscdiv, int hfrosctrim)
-{
-  // Ensure that we aren't running off the PLL before we mess with it.
-  if (PRCI_REG(PRCI_PLLCFG) & PLL_SEL(1)) {
-    // Make sure the HFROSC is running at its default setting
-    PRCI_use_hfrosc(4, 16);
-  }
-  
-  // Set PLL Source to be HFXOSC if desired.
-  uint32_t config_value = 0;
-
-  config_value |= PLL_REFSEL(refsel);
-  
-  if (bypass) {
-    // Bypass
-    config_value |= PLL_BYPASS(1);
-
-    PRCI_REG(PRCI_PLLCFG) = config_value;
-
-    // If we don't have an HFXTAL, this doesn't really matter.
-    // Set our Final output divide to divide-by-1:
-    PRCI_REG(PRCI_PLLDIV) = (PLL_FINAL_DIV_BY_1(1) | PLL_FINAL_DIV(0));
-  } else {
-  
-    // To overclock, use the hfrosc
-    if (hfrosctrim >= 0 && hfroscdiv >= 0) {
-      PRCI_use_hfrosc(hfroscdiv, hfrosctrim);
-    }
-    
-    // Set DIV Settings for PLL
-    
-    // (Legal values of f_REF are 6-48MHz)
-
-    // Set DIVR to divide-by-2 to get 8MHz frequency
-    // (legal values of f_R are 6-12 MHz)
-
-    config_value |= PLL_BYPASS(1);
-    config_value |= PLL_R(r);
-
-    // Set DIVF to get 512Mhz frequncy
-    // There is an implied multiply-by-2, 16Mhz.
-    // So need to write 32-1
-    // (legal values of f_F are 384-768 MHz)
-    config_value |= PLL_F(f);
-
-    // Set DIVQ to divide-by-2 to get 256 MHz frequency
-    // (legal values of f_Q are 50-400Mhz)
-    config_value |= PLL_Q(q);
-
-    // Set our Final output divide to divide-by-1:
-    if (finaldiv == 1){
-      PRCI_REG(PRCI_PLLDIV) = (PLL_FINAL_DIV_BY_1(1) | PLL_FINAL_DIV(0));
-    } else {
-      PRCI_REG(PRCI_PLLDIV) = (PLL_FINAL_DIV(finaldiv-1));
-    }
-
-    PRCI_REG(PRCI_PLLCFG) = config_value;
-
-    // Un-Bypass the PLL.
-    PRCI_REG(PRCI_PLLCFG) &= ~PLL_BYPASS(1);
-
-    // Wait for PLL Lock
-    // Note that the Lock signal can be glitchy.
-    // Need to wait 100 us
-    // RTC is running at 32kHz.
-    // So wait 4 ticks of RTC.
-    uint32_t now = CLINT_REG(CLINT_MTIME);
-    while (CLINT_REG(CLINT_MTIME) - now < 4) ;
-    
-    // Now it is safe to check for PLL Lock
-    while ((PRCI_REG(PRCI_PLLCFG) & PLL_LOCK(1)) == 0);
-
-  }
-
-  // Switch over to PLL Clock source
-  PRCI_REG(PRCI_PLLCFG) |= PLL_SEL(1);
-
-  // If we're running off HFXOSC, turn off the HFROSC to
-  // save power.
-  if (refsel) {
-    PRCI_REG(PRCI_HFROSCCFG) &= ~ROSC_EN(1);
-  }
-  
-}
-
-void PRCI_use_default_clocks()
-{
-  // Turn off the LFROSC
-  AON_REG(AON_LFROSC) &= ~ROSC_EN(1);
-
-  // Use HFROSC
-  PRCI_use_hfrosc(4, 16);
-}
-
-void PRCI_use_hfxosc(uint32_t finaldiv)
-{
-  
-  PRCI_use_pll(1, // Use HFXTAL
-	       1, // Bypass = 1
-	       0, // PLL settings don't matter
-	       0, // PLL settings don't matter
-	       0, // PLL settings don't matter
-	       finaldiv,
-	       -1,
-	       -1);
-}
-
-// This is a generic function, which
-// doesn't span the entire range of HFROSC settings.
-// It only adjusts the trim, which can span a hundred MHz or so.
-// This function does not check the legality of the PLL settings
-// at all, and it is quite possible to configure invalid PLL settings
-// this way.
-// It returns the actual measured CPU frequency.
-
-uint32_t PRCI_set_hfrosctrim_for_f_cpu(uint32_t f_cpu, PRCI_freq_target target )
-{
-
-  uint32_t hfrosctrim = 0;
-  uint32_t hfroscdiv = 4;
-  uint32_t prev_trim = 0;
-
-  // In this function we use PLL settings which
-  // will give us a 32x multiplier from the output
-  // of the HFROSC source to the output of the
-  // PLL. We first measure our HFROSC to get the
-  // right trim, then finally use it as the PLL source.
-  // We should really check here that the f_cpu
-  // requested is something in the limit of the PLL. For
-  // now that is up to the user.
-
-  // This will undershoot for frequencies not divisible by 16.
-  uint32_t desired_hfrosc_freq = (f_cpu/ 16);
-
-  PRCI_use_hfrosc(hfroscdiv, hfrosctrim);
-  
-  // Ignore the first run (for icache reasons)
-  uint32_t cpu_freq = PRCI_measure_mcycle_freq(3000, RTC_FREQ);
-
-  cpu_freq = PRCI_measure_mcycle_freq(3000, RTC_FREQ);
-  uint32_t prev_freq = cpu_freq;
-  
-  while ((cpu_freq < desired_hfrosc_freq) && (hfrosctrim < 0x1F)){
-    prev_trim = hfrosctrim;
-    prev_freq = cpu_freq;
-    hfrosctrim ++;
-    PRCI_use_hfrosc(hfroscdiv, hfrosctrim);
-    cpu_freq = PRCI_measure_mcycle_freq(3000, RTC_FREQ);
-  } 
-
-  // We couldn't go low enough
-  if (prev_freq > desired_hfrosc_freq){
-    PRCI_use_pll(0, 0, 1, 31, 1, 1, hfroscdiv, prev_trim);
-    cpu_freq = PRCI_measure_mcycle_freq(1000, RTC_FREQ);
-    return cpu_freq;
-  }
-  
-  // We couldn't go high enough
-  if (cpu_freq < desired_hfrosc_freq){
-    PRCI_use_pll(0, 0, 1, 31, 1, 1, hfroscdiv, prev_trim);
-    cpu_freq = PRCI_measure_mcycle_freq(1000, RTC_FREQ);
-    return cpu_freq;
-  }
-
-  // Check for over/undershoot
-  switch(target) {
-  case(PRCI_FREQ_CLOSEST):
-    if ((desired_hfrosc_freq - prev_freq) < (cpu_freq - desired_hfrosc_freq)) {
-      PRCI_use_pll(0, 0, 1, 31, 1, 1, hfroscdiv, prev_trim);
-    } else {
-      PRCI_use_pll(0, 0, 1, 31, 1, 1, hfroscdiv, hfrosctrim);
-    }
-    break;
-  case(PRCI_FREQ_UNDERSHOOT):
-    PRCI_use_pll(0, 0, 1, 31, 1, 1, hfroscdiv, prev_trim);
-    break;
-  default:
-    PRCI_use_pll(0, 0, 1, 31, 1, 1, hfroscdiv, hfrosctrim);
-  }
-
-  cpu_freq =  PRCI_measure_mcycle_freq(1000, RTC_FREQ);
-  return cpu_freq;
-
-}
-
-#endif

bare-metal-bsp/drivers/fe300prci/fe300prci_driver.h

@@ -1,79 +0,0 @@
-// See LICENSE file for license details
-
-#ifndef _FE300PRCI_DRIVER_H_
-#define _FE300PRCI_DRIVER_H_
-
-__BEGIN_DECLS
-
-#include <unistd.h>
-
-typedef enum prci_freq_target {
-  
-  PRCI_FREQ_OVERSHOOT,
-  PRCI_FREQ_CLOSEST,
-  PRCI_FREQ_UNDERSHOOT
-
-} PRCI_freq_target;
-
-/* Measure and return the approximate frequency of the 
- * CPU, as given by measuring the mcycle counter against 
- * the mtime ticks.
- */
-uint32_t PRCI_measure_mcycle_freq(uint32_t mtime_ticks, uint32_t mtime_freq);
-
-/* Safely switch over to the HFROSC using the given div
- * and trim settings.
- */
-void PRCI_use_hfrosc(int div, int trim);
-
-/* Safely switch over to the 16MHz HFXOSC,
- * applying the finaldiv clock divider (1 is the lowest
- * legal value).
- */
-void PRCI_use_hfxosc(uint32_t finaldiv);
-
-/* Safely switch over to the PLL using the given
- * settings.
- * 
- * Note that not all combinations of the inputs are actually
- * legal, and this function does not check for their
- * legality ("safely" means that this function won't turn off
- * or glitch the clock the CPU is actually running off, but
- * doesn't protect against you making it too fast or slow.)
- */
-
-void PRCI_use_pll(int refsel, int bypass,
-			 int r, int f, int q, int finaldiv,
-			 int hfroscdiv, int hfrosctrim);
-
-/* Use the default clocks configured at reset.
- * This is ~16Mhz HFROSC and turns off the LFROSC
- * (on the current FE310 Dev Platforms, an external LFROSC is 
- * used as it is more power efficient).
- */
-void PRCI_use_default_clocks();
-
-/* This routine will adjust the HFROSC trim
- * while using HFROSC as the clock source, 
- * measure the resulting frequency, then
- * use it as the PLL clock source, 
- * in an attempt to get over, under, or close to the 
- * requested frequency. It returns the actual measured 
- * frequency. 
- *
- * Note that the requested frequency must be within the 
- * range supported by the PLL so not all values are 
- * achievable with this function, and not all 
- * are guaranteed to actually work. The PLL
- * is rated higher than the hardware.
- * 
- * There is no check on the desired f_cpu frequency, it
- * is up to the user to specify something reasonable.
- */
-
-uint32_t PRCI_set_hfrosctrim_for_f_cpu(uint32_t f_cpu, PRCI_freq_target target);
-
-__END_DECLS
-
-#endif
-  

bare-metal-bsp/drivers/plic/plic_driver.c

@@ -1,127 +0,0 @@
-// See LICENSE for license details.
-
-#include "sifive/devices/plic.h"
-#include "plic/plic_driver.h"
-#include "platform.h"
-#include "encoding.h"
-#include <string.h>
-
-
-// Note that there are no assertions or bounds checking on these
-// parameter values.
-
-void volatile_memzero(uint8_t * base, unsigned int size)
-{
-  volatile uint8_t * ptr;
-  for (ptr = base; ptr < (base + size); ptr++){
-    *ptr = 0;
-  }
-}
-
-void PLIC_init (
-                plic_instance_t * this_plic,
-                uintptr_t         base_addr,
-                uint32_t num_sources,
-                uint32_t num_priorities
-                )
-{
-  
-  this_plic->base_addr = base_addr;
-  this_plic->num_sources = num_sources;
-  this_plic->num_priorities = num_priorities;
-  
-  // Disable all interrupts (don't assume that these registers are reset).
-  unsigned long hart_id = read_csr(mhartid);
-  volatile_memzero((uint8_t*) (this_plic->base_addr +
-                               PLIC_ENABLE_OFFSET +
-                               (hart_id << PLIC_ENABLE_SHIFT_PER_TARGET)),
-                   (num_sources + 8) / 8);
-  
-  // Set all priorities to 0 (equal priority -- don't assume that these are reset).
-  volatile_memzero ((uint8_t *)(this_plic->base_addr +
-                                PLIC_PRIORITY_OFFSET),
-                    (num_sources + 1) << PLIC_PRIORITY_SHIFT_PER_SOURCE);
-
-  // Set the threshold to 0.
-  volatile plic_threshold* threshold = (plic_threshold*)
-    (this_plic->base_addr +
-     PLIC_THRESHOLD_OFFSET +
-     (hart_id << PLIC_THRESHOLD_SHIFT_PER_TARGET));
-
-  *threshold = 0;
-  
-}
-
-void PLIC_set_threshold (plic_instance_t * this_plic,
-			 plic_threshold threshold){
-
-  unsigned long hart_id = read_csr(mhartid);  
-  volatile plic_threshold* threshold_ptr = (plic_threshold*) (this_plic->base_addr +
-                                                              PLIC_THRESHOLD_OFFSET +
-                                                              (hart_id << PLIC_THRESHOLD_SHIFT_PER_TARGET));
-
-  *threshold_ptr = threshold;
-
-}
-  
-
-void PLIC_enable_interrupt (plic_instance_t * this_plic, plic_source source){
-
-  unsigned long hart_id = read_csr(mhartid);
-  volatile uint8_t * current_ptr = (volatile uint8_t *)(this_plic->base_addr +
-                                                        PLIC_ENABLE_OFFSET +
-                                                        (hart_id << PLIC_ENABLE_SHIFT_PER_TARGET) +
-                                                        (source >> 3));
-  uint8_t current = *current_ptr;
-  current = current | ( 1 << (source & 0x7));
-  *current_ptr = current;
-
-}
-
-void PLIC_disable_interrupt (plic_instance_t * this_plic, plic_source source){
-  
-  unsigned long hart_id = read_csr(mhartid);
-  volatile uint8_t * current_ptr = (volatile uint8_t *) (this_plic->base_addr +
-                                                         PLIC_ENABLE_OFFSET +
-                                                         (hart_id << PLIC_ENABLE_SHIFT_PER_TARGET) +
-                                                         (source >> 3));
-  uint8_t current = *current_ptr;
-  current = current & ~(( 1 << (source & 0x7)));
-  *current_ptr = current;
-  
-}
-
-void PLIC_set_priority (plic_instance_t * this_plic, plic_source source, plic_priority priority){
-
-  if (this_plic->num_priorities > 0) {
-    volatile plic_priority * priority_ptr = (volatile plic_priority *)
-      (this_plic->base_addr +
-       PLIC_PRIORITY_OFFSET +
-       (source << PLIC_PRIORITY_SHIFT_PER_SOURCE));
-    *priority_ptr = priority;
-  }
-}
-
-plic_source PLIC_claim_interrupt(plic_instance_t * this_plic){
-  
-  unsigned long hart_id = read_csr(mhartid);
-
-  volatile plic_source * claim_addr = (volatile plic_source * )
-    (this_plic->base_addr +
-     PLIC_CLAIM_OFFSET +
-     (hart_id << PLIC_CLAIM_SHIFT_PER_TARGET));
-
-  return  *claim_addr;
-  
-}
-
-void PLIC_complete_interrupt(plic_instance_t * this_plic, plic_source source){
-  
-  unsigned long hart_id = read_csr(mhartid);
-  volatile plic_source * claim_addr = (volatile plic_source *) (this_plic->base_addr +
-                                                                PLIC_CLAIM_OFFSET +
-                                                                (hart_id << PLIC_CLAIM_SHIFT_PER_TARGET));
-  *claim_addr = source;
-  
-}
-

bare-metal-bsp/drivers/plic/plic_driver.h

@@ -1,51 +0,0 @@
-// See LICENSE file for licence details
-
-#ifndef PLIC_DRIVER_H
-#define PLIC_DRIVER_H
-
-
-__BEGIN_DECLS
-
-#include "platform.h"
-
-typedef struct __plic_instance_t
-{
-  uintptr_t base_addr;
-
-  uint32_t num_sources;
-  uint32_t num_priorities;
-  
-} plic_instance_t;
-
-typedef uint32_t plic_source;
-typedef uint32_t plic_priority;
-typedef uint32_t plic_threshold;
-
-void PLIC_init (
-                plic_instance_t * this_plic,
-                uintptr_t         base_addr,
-                uint32_t num_sources,
-                uint32_t num_priorities
-                );
-
-void PLIC_set_threshold (plic_instance_t * this_plic,
-			 plic_threshold threshold);
-  
-void PLIC_enable_interrupt (plic_instance_t * this_plic,
-			    plic_source source);
-
-void PLIC_disable_interrupt (plic_instance_t * this_plic,
-			     plic_source source);
-  
-void PLIC_set_priority (plic_instance_t * this_plic,
-			plic_source source,
-			plic_priority priority);
-
-plic_source PLIC_claim_interrupt(plic_instance_t * this_plic);
-
-void PLIC_complete_interrupt(plic_instance_t * this_plic,
-			     plic_source source);
-
-__END_DECLS
-
-#endif

bare-metal-bsp/env/.gitignore

@@ -1 +0,0 @@
-/*.o

bare-metal-bsp/env/TGC5L/.gitignore

@@ -1 +0,0 @@
-/*.o

bare-metal-bsp/env/TGC5L/init.c

@@ -1,121 +0,0 @@
-#include <stdint.h>
-#include <stdio.h>
-#include <unistd.h>
-
-#include "platform.h"
-#include "encoding.h"
-
-extern int main(int argc, char** argv);
-extern void trap_entry();
-
-static unsigned long mtime_lo(void)
-{
-    unsigned long ret;
-    __asm volatile("rdtime %0":"=r"(ret));
-    return ret;
-}
-
-
-#if __riscv_xlen==32
-
-static uint32_t mtime_hi(void)
-{
-    unsigned long ret;
-    __asm volatile("rdtimeh %0":"=r"(ret));
-    return ret;
-}
-
-uint64_t get_timer_value()
-{
-  while (1) {
-    uint32_t hi = mtime_hi();
-    uint32_t lo = mtime_lo();
-    if (hi == mtime_hi())
-      return ((uint64_t)hi << 32) | lo;
-  }
-}
-
-#elif __riscv_xlen==64
-
-uint64_t get_timer_value()
-{
-  return mtime_lo();
-}
-
-#endif
-
-unsigned long get_timer_freq()
-{
-  return 32768;
-}
-
-unsigned long get_cpu_freq()
-{
-  return 10000000;
-}
-
-void init_pll(void){
-
-}
-
-#ifdef USE_PLIC
-extern void handle_m_ext_interrupt();
-#endif
-
-#ifdef USE_M_TIME
-extern void handle_m_time_interrupt();
-#endif
-
-uintptr_t handle_trap(uintptr_t mcause, uintptr_t epc)
-{
-  if (0){
-#ifdef USE_PLIC
-    // External Machine-Level interrupt from PLIC
-  } else if ((mcause & MCAUSE_INT) && ((mcause & MCAUSE_CAUSE) == IRQ_M_EXT)) {
-    handle_m_ext_interrupt();
-#endif
-#ifdef USE_M_TIME
-    // External Machine-Level interrupt from PLIC
-  } else if ((mcause & MCAUSE_INT) && ((mcause & MCAUSE_CAUSE) == IRQ_M_TIMER)){
-    handle_m_time_interrupt();
-#endif
-  }
-  else {
-    char* result = "trap 0\n";
-    result[5]=(mcause&0xff)+'0';
-    //write(1, "trap\n", 5);
-    write(1, result, 7);
-    _exit(1 + mcause);
-  }
-  return epc;
-}
-
-void _init()
-{
-  
-#ifndef NO_INIT
-  init_pll();
-  printf("core freq at %d Hz\n", get_cpu_freq());
-  write_csr(mtvec, &trap_entry);
-  if (read_csr(misa) & (1 << ('F' - 'A'))) { // if F extension is present
-    write_csr(mstatus, MSTATUS_FS); // allow FPU instructions without trapping
-    write_csr(fcsr, 0); // initialize rounding mode, undefined at reset
-  }
-#endif
-  
-}
-
-void _fini()
-{
-}
-
-int is_uart_ready(int uart_id){
-    return 1;
-}
-int try_write_uart_char(int uart_id, char c){
-    *((char*)0x10000000) = c;
-    return 1;
-}
-void write_uart_char(int uart_id, char c){
-    *((char*)0x10000000) = c;
-}

bare-metal-bsp/env/TGC5L/link.lds

@@ -1,174 +0,0 @@
-OUTPUT_ARCH( "riscv" )
-
-ENTRY( _start )
-
-MEMORY
-{
-  flash (rxai!w) : ORIGIN = 0x00000000, LENGTH = 256M
-  ram (wxa!ri) :   ORIGIN = 0x20000000, LENGTH = 1M
-}
-
-PHDRS
-{
-  flash PT_LOAD;
-  ram_init PT_LOAD;
-  ram PT_NULL;
-}
-
-SECTIONS
-{
-  __stack_size = DEFINED(__stack_size) ? __stack_size : 2K;
-
-  .init ORIGIN(flash)        :
-  {
-    KEEP (*(SORT_NONE(.init)))
-  } >flash AT>flash :flash
-
-  .text           :
-  {
-    *(.text.unlikely .text.unlikely.*)
-    *(.text.startup .text.startup.*)
-    *(.text .text.*)
-    *(.gnu.linkonce.t.*)
-  } >flash AT>flash :flash
-
-  .fini           :
-  {
-    KEEP (*(SORT_NONE(.fini)))
-  } >flash AT>flash :flash
-
-  PROVIDE (__etext = .);
-  PROVIDE (_etext = .);
-  PROVIDE (etext = .);
-
-  .rodata         :
-  {
-    *(.rdata)
-    *(.rodata .rodata.*)
-    *(.gnu.linkonce.r.*)
-  } >flash AT>flash :flash
-
-  . = ALIGN(4);
-
-  .preinit_array  :
-  {
-    PROVIDE_HIDDEN (__preinit_array_start = .);
-    KEEP (*(.preinit_array))
-    PROVIDE_HIDDEN (__preinit_array_end = .);
-  } >flash AT>flash :flash
-
-  .init_array     :
-  {
-    PROVIDE_HIDDEN (__init_array_start = .);
-    KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
-    KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .ctors))
-    PROVIDE_HIDDEN (__init_array_end = .);
-  } >flash AT>flash :flash
-
-  .fini_array     :
-  {
-    PROVIDE_HIDDEN (__fini_array_start = .);
-    KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))
-    KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .dtors))
-    PROVIDE_HIDDEN (__fini_array_end = .);
-  } >flash AT>flash :flash
-
-  .ctors          :
-  {
-    /* gcc uses crtbegin.o to find the start of
-       the constructors, so we make sure it is
-       first.  Because this is a wildcard, it
-       doesn't matter if the user does not
-       actually link against crtbegin.o; the
-       linker won't look for a file to match a
-       wildcard.  The wildcard also means that it
-       doesn't matter which directory crtbegin.o
-       is in.  */
-    KEEP (*crtbegin.o(.ctors))
-    KEEP (*crtbegin?.o(.ctors))
-    /* We don't want to include the .ctor section from
-       the crtend.o file until after the sorted ctors.
-       The .ctor section from the crtend file contains the
-       end of ctors marker and it must be last */
-    KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
-    KEEP (*(SORT(.ctors.*)))
-    KEEP (*(.ctors))
-  } >flash AT>flash :flash
-
-  .dtors          :
-  {
-    KEEP (*crtbegin.o(.dtors))
-    KEEP (*crtbegin?.o(.dtors))
-    KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
-    KEEP (*(SORT(.dtors.*)))
-    KEEP (*(.dtors))
-  } >flash AT>flash :flash
-
-  .lalign         :
-  {
-    . = ALIGN(4);
-    PROVIDE( _data_lma = . );
-  } >flash AT>flash :flash
-
-  .dalign         :
-  {
-    . = ALIGN(4);
-    PROVIDE( _data = . );
-  } >ram AT>flash :ram_init
-
-  .data          :
-  {
-    __DATA_BEGIN__ = .;
-    *(.data .data.*)
-    *(.gnu.linkonce.d.*)
-  } >ram AT>flash :ram_init
-
-  .srodata        :
-  {
-    PROVIDE( _gp = . + 0x800 );
-    *(.srodata.cst16)
-    *(.srodata.cst8)
-    *(.srodata.cst4)
-    *(.srodata.cst2)
-    *(.srodata .srodata.*)
-  } >ram AT>flash :ram_init
-
-  .sdata          :
-  {
-    __SDATA_BEGIN__ = .;
-    *(.sdata .sdata.*)
-    *(.gnu.linkonce.s.*)
-  } >ram AT>flash :ram_init
-
-  . = ALIGN(4);
-  PROVIDE( _edata = . );
-  PROVIDE( edata = . );
-
-  PROVIDE( _fbss = . );
-  PROVIDE( __bss_start = . );
-  .bss            :
-  {
-    *(.sbss*)
-    *(.gnu.linkonce.sb.*)
-    *(.bss .bss.*)
-    *(.gnu.linkonce.b.*)
-    *(COMMON)
-    . = ALIGN(4);
-  } >ram AT>ram :ram
-
-  . = ALIGN(8);
-  __BSS_END__ = .;
-  __global_pointer$ = MIN(__SDATA_BEGIN__ + 0x800,  MAX(__DATA_BEGIN__ + 0x800, __BSS_END__ - 0x800));
-  PROVIDE( _end = . );
-  PROVIDE( end = . );
-
-  .stack ORIGIN(ram) + LENGTH(ram) - __stack_size :
-  {
-    PROVIDE( _heap_end = . );
-    . = __stack_size;
-    PROVIDE( _sp = . );
-  } >ram AT>ram :ram
-
-  PROVIDE( tohost = 0xfffffff0 );
-  PROVIDE( fromhost = 0xfffffff8 );
-}

bare-metal-bsp/env/TGC5L/platform.h

@@ -1,32 +0,0 @@
-// See LICENSE for license details.
-
-#ifndef _ISS_PLATFORM_H
-#define _ISS_PLATFORM_H
-
-// Some things missing from the official encoding.h
-#define MCAUSE_INT         0x80000000
-#define MCAUSE_CAUSE       0x7FFFFFFF
-
-#include "rtl/const.h"
-/****************************************************************************
- * Platform definitions
- *****************************************************************************/
-
-#define MEM_BASE_ADDR _AC(0x00000000,UL)
-
-// Helper functions
-#define _REG32(p, i) (*(volatile uint32_t *) ((p) + (i)))
-#define _REG32P(p, i) ((volatile uint32_t *) ((p) + (i)))
-
-// Misc
-
-#include <stdint.h>
-
-void init_pll(void);
-unsigned long get_cpu_freq(void);
-unsigned long get_timer_freq(void);
-uint64_t get_timer_value(void);
-int is_uart_ready(int uart_id);
-int try_write_uart_char(int uart_id, char);
-void write_uart_char(int uart_id, char);
-#endif /* _ISS_PLATFORM_H */

bare-metal-bsp/env/common-clang.mk

@@ -1,72 +0,0 @@
-# See LICENSE for license details.
-
-ifndef _SIFIVE_MK_COMMON
-_SIFIVE_MK_COMMON := # defined
-
-.PHONY: all
-all: $(TARGET)
-
-include $(BSP_BASE)/libwrap/libwrap.mk
-
-ENV_DIR = $(BSP_BASE)/env
-PLATFORM_DIR = $(ENV_DIR)/$(BOARD)
-
-ASM_SRCS += $(ENV_DIR)/start.S
-ASM_SRCS += $(ENV_DIR)/entry.S
-C_SRCS += $(PLATFORM_DIR)/init.c
-
-LINKER_SCRIPT := $(PLATFORM_DIR)/$(LINK_TARGET).lds
-
-INCLUDES += -I$(BSP_BASE)/include
-INCLUDES += -I$(BSP_BASE)/drivers/
-INCLUDES += -I$(ENV_DIR)
-INCLUDES += -I$(PLATFORM_DIR)
-
-TOOL_DIR ?= $(BSP_BASE)/../toolchain/bin/
-
-LDFLAGS += -T $(LINKER_SCRIPT) -nostartfiles
-LDFLAGS += -L$(ENV_DIR) --specs=nano.specs
-
-ASM_OBJS := $(ASM_SRCS:.S=.o)
-C_OBJS   := $(C_SRCS:.c=.o)
-CXX_OBJS := $(CXX_SRCS:.cpp=.o)
-
-LINK_OBJS += $(ASM_OBJS) $(C_OBJS) $(CXX_OBJS)
-LINK_DEPS += $(LINKER_SCRIPT)
-
-CLEAN_OBJS += $(TARGET) $(LINK_OBJS)
-
-CFLAGS += -march=$(RISCV_ARCH)
-CFLAGS += -mabi=$(RISCV_ABI)
-CFLAGS += -mcmodel=medany
-
-TRIPLET?=riscv32
-CXX=$(LLVM_TOOL_DIR)clang++ --target=$(TRIPLET) -isystem $(TOOL_DIR)/../$(TRIPLET)/include
-CC=$(LLVM_TOOL_DIR)clang --target=$(TRIPLET) -isystem $(TOOL_DIR)/../$(TRIPLET)/include
-LD=$(TOOL_DIR)$(TRIPLET)-gcc
-AR=$(TOOL_DIR)$(TRIPLET)-ar
-OBJDUMP := $(TOOL_DIR)/$(TRIPLET)-objdump
-
-
-$(TARGET): $(LINK_OBJS) $(LINK_DEPS)
-	$(LD) $(LINK_OBJS) $(LDFLAGS) $(LIBWRAP) -o $@
-	$(OBJDUMP) -d -S $(TARGET) > $(TARGET).dis
-	
-$(ASM_OBJS): %.o: %.S $(HEADERS)
-	$(CC) $(CFLAGS) $(INCLUDES) -c -o $@ $<
-
-$(C_OBJS): %.o: %.c $(HEADERS)
-	$(CC) $(CFLAGS) $(INCLUDES) -include sys/cdefs.h -c -o $@ $<
-
-$(CXX_OBJS): %.o: %.cpp $(HEADERS)
-	$(CXX) $(CFLAGS) $(CXXFLAGS) $(INCLUDES) -include sys/cdefs.h -c -o $@ $<
-
-.PHONY: clean
-clean:
-	rm -f $(TARGET) $(LINK_OBJS)
-
-.PHONY: clean-all
-clean-all:
-	rm -f $(CLEAN_OBJS) $(LIBWRAP)
-
-endif

bare-metal-bsp/env/common-gcc.mk

@@ -1,74 +0,0 @@
-ifndef _MK_COMMON
-_MK_COMMON := # defined
-
-.PHONY: all
-all: $(TARGET)
-
-include $(BSP_BASE)/libwrap/libwrap.mk
-
-BOARD?=iss
-ENV_DIR = $(BSP_BASE)/env
-PLATFORM_DIR = $(ENV_DIR)/$(BOARD)
-
-ASM_SRCS += $(ENV_DIR)/start.S
-ASM_SRCS += $(ENV_DIR)/entry.S
-C_SRCS += $(PLATFORM_DIR)/init.c
-
-LINKER_SCRIPT := $(PLATFORM_DIR)/$(LINK_TARGET).lds
-
-INCLUDES += -I$(BSP_BASE)/include
-INCLUDES += -I$(BSP_BASE)/drivers/
-INCLUDES += -I$(ENV_DIR)
-INCLUDES += -I$(PLATFORM_DIR)
-
-TOOL_DIR ?= $(BSP_BASE)/../toolchain/bin/
-
-LDFLAGS += -march=$(RISCV_ARCH) -mabi=$(RISCV_ABI)
-LDFLAGS += -T $(LINKER_SCRIPT) -Wl,-Map=$(TARGET).map  -nostartfiles
-LDFLAGS += -L$(ENV_DIR)
-# --specs=nano.specs
-
-ASM_OBJS := $(ASM_SRCS:.S=.o)
-C_OBJS   := $(C_SRCS:.c=.o)
-CXX_OBJS := $(CXX_SRCS:.cpp=.o)
-
-LINK_OBJS += $(ASM_OBJS) $(C_OBJS) $(CXX_OBJS)
-LINK_DEPS += $(LINKER_SCRIPT)
-
-CLEAN_OBJS += $(TARGET) $(LINK_OBJS)
-
-GCCVERSION = $(shell $(CC) --version | grep gcc | awk '{print($NF);}')
-ifeq ($(GCCVERSION),9.2)
-  CFLAGS += -march=$(RISCV_ARCH)
-else
-  CFLAGS += -march=$(RISCV_ARCH)_zicsr_zifencei
-endif
-CFLAGS += -mabi=$(RISCV_ABI)
-CFLAGS += -mcmodel=medany
-
-TRIPLET?=riscv64-unknown-elf
-CXX=$(TOOL_DIR)$(TRIPLET)-c++
-CC=$(TOOL_DIR)$(TRIPLET)-gcc
-LD=$(TOOL_DIR)$(TRIPLET)-gcc
-AR=$(TOOL_DIR)$(TRIPLET)-ar
-OBJDUMP := $(TOOL_DIR)$(TRIPLET)-objdump
-
-
-$(TARGET): $(LINK_OBJS) $(LINK_DEPS)
-	$(LD) $(LINK_OBJS) $(LDFLAGS) $(LIBWRAP) -o $@
-	$(OBJDUMP) -d -S $(TARGET) > $(TARGET).dis
-	
-$(ASM_OBJS): %.o: %.S $(HEADERS)
-	$(CC) $(CFLAGS) $(INCLUDES) -c -o $@ $<
-
-$(C_OBJS): %.o: %.c $(HEADERS)
-	$(CC) $(CFLAGS) $(INCLUDES) -include sys/cdefs.h -c -o $@ $<
-
-$(CXX_OBJS): %.o: %.cpp $(HEADERS)
-	$(CXX) $(CFLAGS) $(CXXFLAGS) $(INCLUDES) -include sys/cdefs.h -c -o $@ $<
-
-.PHONY: clean
-clean:
-	rm -f $(CLEAN_OBJS) $(LIBWRAP)
-
-endif

bare-metal-bsp/env/entry.S

@@ -1,99 +0,0 @@
-// See LICENSE for license details
-
-#ifndef ENTRY_S
-#define ENTRY_S
-
-#include "encoding.h"
-#include "rtl/bits.h"
-
-  .section      .text.entry	
-  .align 2
-  .global trap_entry
-trap_entry:
-  addi sp, sp, -32*REGBYTES
-
-  STORE x1, 1*REGBYTES(sp)
-  STORE x2, 2*REGBYTES(sp)
-  STORE x3, 3*REGBYTES(sp)
-  STORE x4, 4*REGBYTES(sp)
-  STORE x5, 5*REGBYTES(sp)
-  STORE x6, 6*REGBYTES(sp)
-  STORE x7, 7*REGBYTES(sp)
-  STORE x8, 8*REGBYTES(sp)
-  STORE x9, 9*REGBYTES(sp)
-  STORE x10, 10*REGBYTES(sp)
-  STORE x11, 11*REGBYTES(sp)
-  STORE x12, 12*REGBYTES(sp)
-  STORE x13, 13*REGBYTES(sp)
-  STORE x14, 14*REGBYTES(sp)
-  STORE x15, 15*REGBYTES(sp)
-#ifndef __riscv_abi_rve
-  STORE x16, 16*REGBYTES(sp)
-  STORE x17, 17*REGBYTES(sp)
-  STORE x18, 18*REGBYTES(sp)
-  STORE x19, 19*REGBYTES(sp)
-  STORE x20, 20*REGBYTES(sp)
-  STORE x21, 21*REGBYTES(sp)
-  STORE x22, 22*REGBYTES(sp)
-  STORE x23, 23*REGBYTES(sp)
-  STORE x24, 24*REGBYTES(sp)
-  STORE x25, 25*REGBYTES(sp)
-  STORE x26, 26*REGBYTES(sp)
-  STORE x27, 27*REGBYTES(sp)
-  STORE x28, 28*REGBYTES(sp)
-  STORE x29, 29*REGBYTES(sp)
-  STORE x30, 30*REGBYTES(sp)
-  STORE x31, 31*REGBYTES(sp)
-#endif
-  csrr a0, mcause
-  csrr a1, mepc
-  mv a2, sp
-  call handle_trap
-  csrw mepc, a0
-
-  # Remain in M-mode after mret
-  li t0, MSTATUS_MPP
-  csrs mstatus, t0
-
-  LOAD x1, 1*REGBYTES(sp)
-  LOAD x2, 2*REGBYTES(sp)
-  LOAD x3, 3*REGBYTES(sp)
-  LOAD x4, 4*REGBYTES(sp)
-  LOAD x5, 5*REGBYTES(sp)
-  LOAD x6, 6*REGBYTES(sp)
-  LOAD x7, 7*REGBYTES(sp)
-  LOAD x8, 8*REGBYTES(sp)
-  LOAD x9, 9*REGBYTES(sp)
-  LOAD x10, 10*REGBYTES(sp)
-  LOAD x11, 11*REGBYTES(sp)
-  LOAD x12, 12*REGBYTES(sp)
-  LOAD x13, 13*REGBYTES(sp)
-  LOAD x14, 14*REGBYTES(sp)
-  LOAD x15, 15*REGBYTES(sp)
-#ifndef __riscv_abi_rve
-  LOAD x16, 16*REGBYTES(sp)
-  LOAD x17, 17*REGBYTES(sp)
-  LOAD x18, 18*REGBYTES(sp)
-  LOAD x19, 19*REGBYTES(sp)
-  LOAD x20, 20*REGBYTES(sp)
-  LOAD x21, 21*REGBYTES(sp)
-  LOAD x22, 22*REGBYTES(sp)
-  LOAD x23, 23*REGBYTES(sp)
-  LOAD x24, 24*REGBYTES(sp)
-  LOAD x25, 25*REGBYTES(sp)
-  LOAD x26, 26*REGBYTES(sp)
-  LOAD x27, 27*REGBYTES(sp)
-  LOAD x28, 28*REGBYTES(sp)
-  LOAD x29, 29*REGBYTES(sp)
-  LOAD x30, 30*REGBYTES(sp)
-  LOAD x31, 31*REGBYTES(sp)
-#endif
-  addi sp, sp, 32*REGBYTES
-  mret
-
-.weak handle_trap
-handle_trap:
-1:
-  j 1b
-	
-#endif

bare-metal-bsp/env/iss/.gitignore

@@ -1 +0,0 @@
-/*.o

bare-metal-bsp/env/iss/init.c

@@ -1,107 +0,0 @@
-#include <stdint.h>
-#include <stdio.h>
-#include <unistd.h>
-
-#include "platform.h"
-#include "encoding.h"
-
-extern int main(int argc, char** argv);
-extern void trap_entry();
-
-static unsigned long mtime_lo(void)
-{
-    unsigned long ret;
-    __asm volatile("rdtime %0":"=r"(ret));
-    return ret;
-}
-
-
-#if __riscv_xlen==32
-
-static uint32_t mtime_hi(void)
-{
-    unsigned long ret;
-    __asm volatile("rdtimeh %0":"=r"(ret));
-    return ret;
-}
-
-uint64_t get_timer_value()
-{
-  while (1) {
-    uint32_t hi = mtime_hi();
-    uint32_t lo = mtime_lo();
-    if (hi == mtime_hi())
-      return ((uint64_t)hi << 32) | lo;
-  }
-}
-
-#elif __riscv_xlen==64
-
-uint64_t get_timer_value()
-{
-  return mtime_lo();
-}
-
-#endif
-
-unsigned long get_timer_freq()
-{
-  return 32768;
-}
-
-unsigned long get_cpu_freq()
-{
-  return 10000000;
-}
-
-void init_pll(void){
-
-}
-
-#ifdef USE_PLIC
-extern void handle_m_ext_interrupt();
-#endif
-
-#ifdef USE_M_TIME
-extern void handle_m_time_interrupt();
-#endif
-
-uintptr_t handle_trap(uintptr_t mcause, uintptr_t epc)
-{
-  if (0){
-#ifdef USE_PLIC
-    // External Machine-Level interrupt from PLIC
-  } else if ((mcause & MCAUSE_INT) && ((mcause & MCAUSE_CAUSE) == IRQ_M_EXT)) {
-    handle_m_ext_interrupt();
-#endif
-#ifdef USE_M_TIME
-    // External Machine-Level interrupt from PLIC
-  } else if ((mcause & MCAUSE_INT) && ((mcause & MCAUSE_CAUSE) == IRQ_M_TIMER)){
-    handle_m_time_interrupt();
-#endif
-  }
-  else {
-    write(1, "trap\n", 5);
-    _exit(1 + mcause);
-  }
-  return epc;
-}
-
-void _init()
-{
-  
-#ifndef NO_INIT
-  init_pll();
-  printf("core freq at %d Hz\n", get_cpu_freq());
-  write_csr(mtvec, &trap_entry);
-  if (read_csr(misa) & (1 << ('F' - 'A'))) { // if F extension is present
-    write_csr(mstatus, MSTATUS_FS); // allow FPU instructions without trapping
-    write_csr(fcsr, 0); // initialize rounding mode, undefined at reset
-  }
-#endif
-  
-}
-
-void _fini()
-{
-}

bare-metal-bsp/env/iss/link.lds

@@ -1,174 +0,0 @@
-OUTPUT_ARCH( "riscv" )
-
-ENTRY( _start )
-
-MEMORY
-{
-  flash (rxai!w) : ORIGIN = 0x00000020, LENGTH = 1M
-  ram (wxa!ri) :   ORIGIN = 0x10000000, LENGTH = 16K
-}
-
-PHDRS
-{
-  flash PT_LOAD;
-  ram_init PT_LOAD;
-  ram PT_NULL;
-}
-
-SECTIONS
-{
-  __stack_size = DEFINED(__stack_size) ? __stack_size : 2K;
-
-  .init ORIGIN(flash)        :
-  {
-    KEEP (*(SORT_NONE(.init)))
-  } >flash AT>flash :flash
-
-  .text           :
-  {
-    *(.text.unlikely .text.unlikely.*)
-    *(.text.startup .text.startup.*)
-    *(.text .text.*)
-    *(.gnu.linkonce.t.*)
-  } >flash AT>flash :flash
-
-  .fini           :
-  {
-    KEEP (*(SORT_NONE(.fini)))
-  } >flash AT>flash :flash
-
-  PROVIDE (__etext = .);
-  PROVIDE (_etext = .);
-  PROVIDE (etext = .);
-
-  .rodata         :
-  {
-    *(.rdata)
-    *(.rodata .rodata.*)
-    *(.gnu.linkonce.r.*)
-  } >flash AT>flash :flash
-
-  . = ALIGN(4);
-
-  .preinit_array  :
-  {
-    PROVIDE_HIDDEN (__preinit_array_start = .);
-    KEEP (*(.preinit_array))
-    PROVIDE_HIDDEN (__preinit_array_end = .);
-  } >flash AT>flash :flash
-
-  .init_array     :
-  {
-    PROVIDE_HIDDEN (__init_array_start = .);
-    KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
-    KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .ctors))
-    PROVIDE_HIDDEN (__init_array_end = .);
-  } >flash AT>flash :flash
-
-  .fini_array     :
-  {
-    PROVIDE_HIDDEN (__fini_array_start = .);
-    KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))
-    KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .dtors))
-    PROVIDE_HIDDEN (__fini_array_end = .);
-  } >flash AT>flash :flash
-
-  .ctors          :
-  {
-    /* gcc uses crtbegin.o to find the start of
-       the constructors, so we make sure it is
-       first.  Because this is a wildcard, it
-       doesn't matter if the user does not
-       actually link against crtbegin.o; the
-       linker won't look for a file to match a
-       wildcard.  The wildcard also means that it
-       doesn't matter which directory crtbegin.o
-       is in.  */
-    KEEP (*crtbegin.o(.ctors))
-    KEEP (*crtbegin?.o(.ctors))
-    /* We don't want to include the .ctor section from
-       the crtend.o file until after the sorted ctors.
-       The .ctor section from the crtend file contains the
-       end of ctors marker and it must be last */
-    KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
-    KEEP (*(SORT(.ctors.*)))
-    KEEP (*(.ctors))
-  } >flash AT>flash :flash
-
-  .dtors          :
-  {
-    KEEP (*crtbegin.o(.dtors))
-    KEEP (*crtbegin?.o(.dtors))
-    KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
-    KEEP (*(SORT(.dtors.*)))
-    KEEP (*(.dtors))
-  } >flash AT>flash :flash
-
-  .lalign         :
-  {
-    . = ALIGN(4);
-    PROVIDE( _data_lma = . );
-  } >flash AT>flash :flash
-
-  .dalign         :
-  {
-    . = ALIGN(4);
-    PROVIDE( _data = . );
-  } >ram AT>flash :ram_init
-
-  .data          :
-  {
-    __DATA_BEGIN__ = .;
-    *(.data .data.*)
-    *(.gnu.linkonce.d.*)
-  } >ram AT>flash :ram_init
-
-  .srodata        :
-  {
-    PROVIDE( _gp = . + 0x800 );
-    *(.srodata.cst16)
-    *(.srodata.cst8)
-    *(.srodata.cst4)
-    *(.srodata.cst2)
-    *(.srodata .srodata.*)
-  } >ram AT>flash :ram_init
-
-  .sdata          :
-  {
-    __SDATA_BEGIN__ = .;
-    *(.sdata .sdata.*)
-    *(.gnu.linkonce.s.*)
-  } >ram AT>flash :ram_init
-
-  . = ALIGN(4);
-  PROVIDE( _edata = . );
-  PROVIDE( edata = . );
-
-  PROVIDE( _fbss = . );
-  PROVIDE( __bss_start = . );
-  .bss            :
-  {
-    *(.sbss*)
-    *(.gnu.linkonce.sb.*)
-    *(.bss .bss.*)
-    *(.gnu.linkonce.b.*)
-    *(COMMON)
-    . = ALIGN(4);
-  } >ram AT>ram :ram
-
-  . = ALIGN(8);
-  __BSS_END__ = .;
-  __global_pointer$ = MIN(__SDATA_BEGIN__ + 0x800,  MAX(__DATA_BEGIN__ + 0x800, __BSS_END__ - 0x800));
-  PROVIDE( _end = . );
-  PROVIDE( end = . );
-
-  .stack ORIGIN(ram) + LENGTH(ram) - __stack_size :
-  {
-    PROVIDE( _heap_end = . );
-    . = __stack_size;
-    PROVIDE( _sp = . );
-  } >ram AT>ram :ram
-
-  PROVIDE( tohost = 0xfffffff0 );
-  PROVIDE( fromhost = 0xfffffff8 );
-}

bare-metal-bsp/env/iss/platform.h

@@ -1,30 +0,0 @@
-// See LICENSE for license details.
-
-#ifndef _ISS_PLATFORM_H
-#define _ISS_PLATFORM_H
-
-// Some things missing from the official encoding.h
-#define MCAUSE_INT         0x80000000
-#define MCAUSE_CAUSE       0x7FFFFFFF
-
-#include "rtl/const.h"
-/****************************************************************************
- * Platform definitions
- *****************************************************************************/
-
-#define MEM_BASE_ADDR _AC(0x00000000,UL)
-
-// Helper functions
-#define _REG32(p, i) (*(volatile uint32_t *) ((p) + (i)))
-#define _REG32P(p, i) ((volatile uint32_t *) ((p) + (i)))
-
-// Misc
-
-#include <stdint.h>
-
-void init_pll(void);
-unsigned long get_cpu_freq(void);
-unsigned long get_timer_freq(void);
-uint64_t get_timer_value(void);
-
-#endif /* _ISS_PLATFORM_H */

bare-metal-bsp/env/rtl/.gitignore

@@ -1 +0,0 @@
-/*.o

bare-metal-bsp/env/rtl/init.c

@@ -1,107 +0,0 @@
-#include <stdint.h>
-#include <stdio.h>
-#include <unistd.h>
-
-#include "platform.h"
-#include "encoding.h"
-
-extern int main(int argc, char** argv);
-extern void trap_entry();
-
-static unsigned long mtime_lo(void)
-{
-    unsigned long ret;
-    __asm volatile("rdtime %0":"=r"(ret));
-    return ret;
-}
-
-
-#if __riscv_xlen==32
-
-static uint32_t mtime_hi(void)
-{
-    unsigned long ret;
-    __asm volatile("rdtimeh %0":"=r"(ret));
-    return ret;
-}
-
-uint64_t get_timer_value()
-{
-  while (1) {
-    uint32_t hi = mtime_hi();
-    uint32_t lo = mtime_lo();
-    if (hi == mtime_hi())
-      return ((uint64_t)hi << 32) | lo;
-  }
-}
-
-#elif __riscv_xlen==64
-
-uint64_t get_timer_value()
-{
-  return mtime_lo();
-}
-
-#endif
-
-unsigned long get_timer_freq()
-{
-  return 32768;
-}
-
-unsigned long get_cpu_freq()
-{
-  return 10000000;
-}
-
-void init_pll(void){
-
-}
-
-#ifdef USE_PLIC
-extern void handle_m_ext_interrupt();
-#endif
-
-#ifdef USE_M_TIME
-extern void handle_m_time_interrupt();
-#endif
-
-uintptr_t handle_trap(uintptr_t mcause, uintptr_t epc)
-{
-  if (0){
-#ifdef USE_PLIC
-    // External Machine-Level interrupt from PLIC
-  } else if ((mcause & MCAUSE_INT) && ((mcause & MCAUSE_CAUSE) == IRQ_M_EXT)) {
-    handle_m_ext_interrupt();
-#endif
-#ifdef USE_M_TIME
-    // External Machine-Level interrupt from PLIC
-  } else if ((mcause & MCAUSE_INT) && ((mcause & MCAUSE_CAUSE) == IRQ_M_TIMER)){
-    handle_m_time_interrupt();
-#endif
-  }
-  else {
-    write(1, "trap\n", 5);
-    _exit(1 + mcause);
-  }
-  return epc;
-}
-
-void _init()
-{
-  
-#ifndef NO_INIT
-  init_pll();
-  printf("core freq at %d Hz\n", get_cpu_freq());
-  write_csr(mtvec, &trap_entry);
-  if (read_csr(misa) & (1 << ('F' - 'A'))) { // if F extension is present
-    write_csr(mstatus, MSTATUS_FS); // allow FPU instructions without trapping
-    write_csr(fcsr, 0); // initialize rounding mode, undefined at reset
-  }
-#endif
-  
-}
-
-void _fini()
-{
-}

bare-metal-bsp/env/rtl/link.lds

@@ -1,175 +0,0 @@
-OUTPUT_ARCH( "riscv" )
-
-ENTRY( _start )
-
-MEMORY
-{
-  flash (rxai!w) : ORIGIN = 0x00000000, LENGTH = 1M
-  ram (wxa!ri) :   ORIGIN = 0x10000000, LENGTH = 16K
-}
-
-PHDRS
-{
-  flash PT_LOAD;
-  ram_init PT_LOAD;
-  ram PT_NULL;
-}
-
-SECTIONS
-{
-  __stack_size = DEFINED(__stack_size) ? __stack_size : 2K;
-
-  .init ORIGIN(flash)        :
-  {
-    KEEP (*(SORT_NONE(.init)))
-  } >flash AT>flash :flash
-
-  .text           :
-  {
-    *(.text.unlikely .text.unlikely.*)
-    *(.text.startup .text.startup.*)
-    *(.text .text.*)
-    *(.gnu.linkonce.t.*)
-  } >flash AT>flash :flash
-
-  .fini           :
-  {
-    KEEP (*(SORT_NONE(.fini)))
-  } >flash AT>flash :flash
-
-  PROVIDE (__etext = .);
-  PROVIDE (_etext = .);
-  PROVIDE (etext = .);
-
-  .rodata         :
-  {
-    *(.rdata)
-    *(.rodata .rodata.*)
-    *(.gnu.linkonce.r.*)
-  } >flash AT>flash :flash
-
-  . = ALIGN(4);
-
-  .preinit_array  :
-  {
-    PROVIDE_HIDDEN (__preinit_array_start = .);
-    KEEP (*(.preinit_array))
-    PROVIDE_HIDDEN (__preinit_array_end = .);
-  } >flash AT>flash :flash
-
-  .init_array     :
-  {
-    PROVIDE_HIDDEN (__init_array_start = .);
-    KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
-    KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .ctors))
-    PROVIDE_HIDDEN (__init_array_end = .);
-  } >flash AT>flash :flash
-
-  .fini_array     :
-  {
-    PROVIDE_HIDDEN (__fini_array_start = .);
-    KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))
-    KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .dtors))
-    PROVIDE_HIDDEN (__fini_array_end = .);
-  } >flash AT>flash :flash
-
-  .ctors          :
-  {
-    /* gcc uses crtbegin.o to find the start of
-       the constructors, so we make sure it is
-       first.  Because this is a wildcard, it
-       doesn't matter if the user does not
-       actually link against crtbegin.o; the
-       linker won't look for a file to match a
-       wildcard.  The wildcard also means that it
-       doesn't matter which directory crtbegin.o
-       is in.  */
-    KEEP (*crtbegin.o(.ctors))
-    KEEP (*crtbegin?.o(.ctors))
-    /* We don't want to include the .ctor section from
-       the crtend.o file until after the sorted ctors.
-       The .ctor section from the crtend file contains the
-       end of ctors marker and it must be last */
-    KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
-    KEEP (*(SORT(.ctors.*)))
-    KEEP (*(.ctors))
-  } >flash AT>flash :flash
-
-  .dtors          :
-  {
-    KEEP (*crtbegin.o(.dtors))
-    KEEP (*crtbegin?.o(.dtors))
-    KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
-    KEEP (*(SORT(.dtors.*)))
-    KEEP (*(.dtors))
-  } >flash AT>flash :flash
-
-  .lalign         :
-  {
-    . = ALIGN(4);
-    PROVIDE( _data_lma = . );
-  } >flash AT>flash :flash
-
-  .dalign         :
-  {
-    . = ALIGN(4);
-    PROVIDE( _data = . );
-  } >ram AT>flash :ram_init
-
-  .data          :
-  {
-    __DATA_BEGIN__ = .;
-    *(.data .data.*)
-    *(.gnu.linkonce.d.*)
-  } >ram AT>flash :ram_init
-
-  .srodata        :
-  {
-    PROVIDE( _gp = . + 0x800 );
-    *(.srodata.cst16)
-    *(.srodata.cst8)
-    *(.srodata.cst4)
-    *(.srodata.cst2)
-    *(.srodata .srodata.*)
-  } >ram AT>flash :ram_init
-
-  .sdata          :
-  {
-    __SDATA_BEGIN__ = .;
-    *(.sdata .sdata.*)
-    *(.gnu.linkonce.s.*)
-  } >ram AT>flash :ram_init
-
-  . = ALIGN(4);
-  PROVIDE( _edata = . );
-  PROVIDE( edata = . );
-
-  PROVIDE( _fbss = . );
-  PROVIDE( __bss_start = . );
-  .bss            :
-  {
-    *(.sbss*)
-    *(.gnu.linkonce.sb.*)
-    *(.bss .bss.*)
-    *(.gnu.linkonce.b.*)
-    *(COMMON)
-    . = ALIGN(4);
-  } >ram AT>ram :ram
-
-  . = ALIGN(8);
-  __BSS_END__ = .;
-  __global_pointer$ = MIN(__SDATA_BEGIN__ + 0x800,  MAX(__DATA_BEGIN__ + 0x800, __BSS_END__ - 0x800));
-  PROVIDE( _end = . );
-  PROVIDE( end = . );
-
-  .stack ORIGIN(ram) + LENGTH(ram) - __stack_size :
-  {
-    PROVIDE( _heap_end = . );
-    . = __stack_size;
-    PROVIDE( _sp = . );
-  } >ram AT>ram :ram
-
-  #PROVIDE( tohost = 0x00018000 );
-  PROVIDE( tohost = 0xfffffff0 );
-  PROVIDE( fromhost = 0xfffffff8 );
-}

bare-metal-bsp/env/rtl/platform.h

@@ -1,30 +0,0 @@
-// See LICENSE for license details.
-
-#ifndef _ISS_PLATFORM_H
-#define _ISS_PLATFORM_H
-
-// Some things missing from the official encoding.h
-#define MCAUSE_INT         0x80000000
-#define MCAUSE_CAUSE       0x7FFFFFFF
-
-#include "rtl/const.h"
-/****************************************************************************
- * Platform definitions
- *****************************************************************************/
-
-#define MEM_BASE_ADDR _AC(0x00000000,UL)
-
-// Helper functions
-#define _REG32(p, i) (*(volatile uint32_t *) ((p) + (i)))
-#define _REG32P(p, i) ((volatile uint32_t *) ((p) + (i)))
-
-// Misc
-
-#include <stdint.h>
-
-void init_pll(void);
-unsigned long get_cpu_freq(void);
-unsigned long get_timer_freq(void);
-uint64_t get_timer_value(void);
-
-#endif /* _ISS_PLATFORM_H */

bare-metal-bsp/env/start.S

@@ -1,60 +0,0 @@
-// See LICENSE for license details.
-
-	.section .init
-	.globl _start
-	.type _start,@function
-
-_start:
-    la gp, trap_entry
-    csrw mtvec, gp
-.option push
-.option norelax
-    la gp, __global_pointer$
-.option pop
-	la sp, _sp
-
-	/* Load data section */
-	la a0, _data_lma
-	la a1, _data
-	la a2, _edata
-	bgeu a1, a2, 2f
-1:
-	lw t0, (a0)
-	addi a0, a0, 4
-	sw t0, (a1)
-	addi a1, a1, 4
-	bltu a1, a2, 1b
-2:
-
-	/* Clear bss section */
-	la a0, __bss_start
-	la a1, _end
-	bgeu a0, a1, 2f
-1:
-	sw zero, (a0)
-	addi a0, a0, 4
-	bltu a0, a1, 1b
-2:
-
-	/* Call global constructors */
-//#ifdef HAVE_INIT_FINI
-	la a0, __libc_fini_array
-	call atexit
-	call __libc_init_array
-//#endif
-#ifndef __riscv_float_abi_soft
-	/* Enable FPU */
-	li t0, MSTATUS_FS
-	csrs mstatus, t0
-	csrr t1, mstatus
-	and t1, t1, t0
-	beqz t1, 1f
-	fssr x0
-1:
-#endif
-
-	/* argc = argv = 0 */
-	li a0, 0
-	li a1, 0
-	call main
-	tail _exit

bare-metal-bsp/include/rtl/bits.h

@@ -1,35 +0,0 @@
-#ifndef _RISCV_BITS_H
-#define _RISCV_BITS_H
-
-#define likely(x) __builtin_expect((x), 1)
-#define unlikely(x) __builtin_expect((x), 0)
-
-#define ROUNDUP(a, b) ((((a)-1)/(b)+1)*(b))
-#define ROUNDDOWN(a, b) ((a)/(b)*(b))
-
-#define MAX(a, b) ((a) > (b) ? (a) : (b))
-#define MIN(a, b) ((a) < (b) ? (a) : (b))
-#define CLAMP(a, lo, hi) MIN(MAX(a, lo), hi)
-
-#define EXTRACT_FIELD(val, which) (((val) & (which)) / ((which) & ~((which)-1)))
-#define INSERT_FIELD(val, which, fieldval) (((val) & ~(which)) | ((fieldval) * ((which) & ~((which)-1))))
-
-#define STR(x) XSTR(x)
-#define XSTR(x) #x
-
-#ifdef __riscv64
-# define SLL32    sllw
-# define STORE    sd
-# define LOAD     ld
-# define LWU      lwu
-# define LOG_REGBYTES 3
-#else
-# define SLL32    sll
-# define STORE    sw
-# define LOAD     lw
-# define LWU      lw
-# define LOG_REGBYTES 2
-#endif
-#define REGBYTES (1 << LOG_REGBYTES)
-
-#endif

bare-metal-bsp/include/rtl/const.h

@@ -1,27 +0,0 @@
-#ifndef _RTL_CONST_H
-#define _RTL_CONST_H
-
-#ifdef __ASSEMBLER__
-#define _AC(X,Y)        X
-#define _AT(T,X)        X
-#else
-#define _AC(X,Y)        (X##Y)
-#define _AT(T,X)        ((T)(X))
-#endif /* !__ASSEMBLER__*/
-
-#define _BITUL(x)       (_AC(1,UL) << (x))
-#define _BITULL(x)      (_AC(1,ULL) << (x))
-
-#define UART0_BASE_ADDR 0xffff0000ULL
-
-#define UART_REG_TXFIFO         0x00
-#define UART_REG_RXFIFO         0x04
-#define UART_REG_TXCTRL         0x08
-#define UART_REG_RXCTRL         0x0c
-#define UART_REG_IE             0x10
-#define UART_REG_IP             0x14
-#define UART_REG_DIV            0x18
-#define UART_TXEN               0x1
-
-#define UART0_REG(ADDR) *((volatile uint32_t*) (UART0_BASE_ADDR + ADDR))
-#endif /* _RTL_CONST_H */

bare-metal-bsp/include/rtl/sections.h

@@ -1,16 +0,0 @@
-#ifndef _SECTIONS_H
-#define _SECTIONS_H
-
-extern unsigned char _rom[];
-extern unsigned char _rom_end[];
-
-extern unsigned char _ram[];
-extern unsigned char _ram_end[];
-
-extern unsigned char _ftext[];
-extern unsigned char _etext[];
-extern unsigned char _fbss[];
-extern unsigned char _ebss[];
-extern unsigned char _end[];
-
-#endif /* _SECTIONS_H */

bare-metal-bsp/libwrap/libwrap.mk

@@ -1,73 +0,0 @@
-ifndef _MK_LIBWRAP
-_MK_LIBWRAP := # defined
-
-LIBWRAP_DIR := $(dir $(lastword $(MAKEFILE_LIST)))
-LIBWRAP_DIR := $(LIBWRAP_DIR:/=)
-
-LIBWRAP_SRCS := \
-	stdlib/malloc.c \
-	sys/open.c \
-	sys/lseek.c \
-	sys/read.c \
-	sys/write.c \
-	sys/fstat.c \
-	sys/stat.c \
-	sys/close.c \
-	sys/link.c \
-	sys/unlink.c \
-	sys/execve.c \
-	sys/fork.c \
-	sys/getpid.c \
-	sys/kill.c \
-	sys/wait.c \
-	sys/isatty.c \
-	sys/times.c \
-	sys/sbrk.c \
-	sys/_exit.c \
-	sys/puts.c \
-	misc/write_hex.c \
-	sys/printf.c
-
-LIBWRAP_SRCS := $(foreach f,$(LIBWRAP_SRCS),$(LIBWRAP_DIR)/$(f))
-LIBWRAP_OBJS := $(LIBWRAP_SRCS:.c=.o)
-
-LIBWRAP_SYMS := \
-	malloc \
-	open \
-	lseek _lseek\
-	read _read\
-	write _write\
-	fstat _fstat\
-	stat \
-	close _close\
-	link \
-	unlink \
-	execve \
-	fork \
-	getpid \
-	kill \
-	wait \
-	isatty \
-	times \
-	sbrk _sbrk\
-	_exit \
-	puts _puts\
-	printf \
-	sprintf
-
-LIBWRAP := libwrap.a
-
-LINK_DEPS += $(LIBWRAP)
-
-LDFLAGS += $(foreach s,$(LIBWRAP_SYMS),-Wl,--wrap=$(s))
-LDFLAGS += -L. -Wl,--start-group -lwrap -lc -Wl,--end-group
-
-CLEAN_OBJS += $(LIBWRAP_OBJS)
-
-$(LIBWRAP_OBJS): %.o: %.c $(HEADERS)
-	$(CC) $(CFLAGS) $(INCLUDES) -c -o $@ $<
-
-$(LIBWRAP): $(LIBWRAP_OBJS)
-	$(AR) rcs $@ $^
-
-endif # _MK_LIBWRAP

bare-metal-bsp/libwrap/misc/.gitignore

@@ -1 +0,0 @@
-/*.o

bare-metal-bsp/libwrap/misc/write_hex.c

@@ -1,19 +0,0 @@
-/* See LICENSE of license details. */
-
-#include <stdint.h>
-#include <unistd.h>
-#include "platform.h"
-
-void write_hex(int fd, uint32_t hex)
-{
-  uint8_t ii;
-  uint8_t jj;
-  char towrite;
-  write(fd , "0x", 2);
-  for (ii = 8 ; ii > 0; ii--) {
-    jj = ii - 1;
-    uint8_t digit = ((hex & (0xF << (jj*4))) >> (jj*4));
-    towrite = digit < 0xA ? ('0' + digit) : ('A' +  (digit - 0xA));
-    write(fd, &towrite, 1);
-  }
-}

bare-metal-bsp/libwrap/stdlib/.gitignore

@@ -1 +0,0 @@
-/*.o

bare-metal-bsp/libwrap/stdlib/malloc.c

@@ -1,17 +0,0 @@
-/* See LICENSE for license details. */
-
-/* These functions are intended for embedded RV32 systems and are
-   obviously incorrect in general. */
-
-void* __wrap_malloc(unsigned long sz)
-{
-  extern void* sbrk(long);
-  void* res = sbrk(sz);
-  if ((long)res == -1)
-    return 0;
-  return res;
-}
-
-void __wrap_free(void* ptr)
-{
-}

bare-metal-bsp/libwrap/sys/.gitignore

@@ -1 +0,0 @@
-/*.o

bare-metal-bsp/libwrap/sys/_exit.c

@@ -1,22 +0,0 @@
-/* See LICENSE of license details. */
-
-#include <unistd.h>
-#include "platform.h"
-
-extern volatile uint32_t tohost;
-extern volatile uint32_t fromhost;
-void write_hex(int fd, uint32_t hex);
-
-void __wrap__exit(int code)
-{
-//volatile uint32_t* leds = (uint32_t*) (GPIO_BASE_ADDR + GPIO_OUT_OFFSET);
-  const char message[] = "\nProgam has exited with code:";
-//*leds = (~(code));
-
-  write(STDERR_FILENO, message, sizeof(message) - 1);
-  write_hex(STDERR_FILENO, code);
-  write(STDERR_FILENO, "\n", 1);
-  tohost = code+1;
-  write(STDERR_FILENO, "\x04", 1);
-  for (;;);
-}

bare-metal-bsp/libwrap/sys/close.c

@@ -1,13 +0,0 @@
-/* See LICENSE of license details. */
-
-#include <errno.h>
-#include "stub.h"
-#include "weak_under_alias.h"
-
-int __wrap_close(int fd)
-{
-  return _stub(EBADF);
-}
-
-weak_under_alias(close);
-

bare-metal-bsp/libwrap/sys/execve.c

@@ -1,9 +0,0 @@
-/* See LICENSE of license details. */
-
-#include <errno.h>
-#include "stub.h"
-
-int __wrap_execve(const char* name, char* const argv[], char* const env[])
-{
-  return _stub(ENOMEM);
-}

bare-metal-bsp/libwrap/sys/fork.c

@@ -1,9 +0,0 @@
-/* See LICENSE of license details. */
-
-#include <errno.h>
-#include "stub.h"
-
-int fork(void)
-{
-  return _stub(EAGAIN);
-}

bare-metal-bsp/libwrap/sys/fstat.c

@@ -1,19 +0,0 @@
-/* See LICENSE of license details. */
-
-#include <errno.h>
-#include <unistd.h>
-#include <sys/stat.h>
-#include "stub.h"
-#include "weak_under_alias.h"
-
-int __wrap_fstat(int fd, struct stat* st)
-{
-  if (isatty(fd)) {
-    st->st_mode = S_IFCHR;
-    return 0;
-  }
-
-  return _stub(EBADF);
-}
-
-weak_under_alias(fstat);

bare-metal-bsp/libwrap/sys/getpid.c

@@ -1,6 +0,0 @@
-/* See LICENSE of license details. */
-
-int __wrap_getpid(void)
-{
-  return 1;
-}

bare-metal-bsp/libwrap/sys/isatty.c

@@ -1,11 +0,0 @@
-/* See LICENSE of license details. */
-
-#include <unistd.h>
-
-int __wrap_isatty(int fd)
-{
-  if (fd == STDOUT_FILENO || fd == STDERR_FILENO)
-    return 1;
-
-  return 0;
-}

bare-metal-bsp/libwrap/sys/kill.c

@@ -1,9 +0,0 @@
-/* See LICENSE of license details. */
-
-#include <errno.h>
-#include "stub.h"
-
-int __wrap_kill(int pid, int sig)
-{
-  return _stub(EINVAL);
-}

bare-metal-bsp/libwrap/sys/link.c

@@ -1,9 +0,0 @@
-/* See LICENSE of license details. */
-
-#include <errno.h>
-#include "stub.h"
-
-int __wrap_link(const char *old_name, const char *new_name)
-{
-  return _stub(EMLINK);
-}

bare-metal-bsp/libwrap/sys/lseek.c

@@ -1,18 +0,0 @@
-/* See LICENSE of license details. */
-
-#include <errno.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include "stub.h"
-#include "weak_under_alias.h"
-
-off_t __wrap_lseek(int fd, off_t ptr, int dir)
-{
-  if (isatty(fd))
-    return 0;
-
-  return _stub(EBADF);
-}
-
-weak_under_alias(lseek);
-

bare-metal-bsp/libwrap/sys/open.c

@@ -1,9 +0,0 @@
-/* See LICENSE of license details. */
-
-#include <errno.h>
-#include "stub.h"
-
-int __wrap_open(const char* name, int flags, int mode)
-{
-  return _stub(ENOENT);
-}

bare-metal-bsp/libwrap/sys/openat.c

@@ -1,9 +0,0 @@
-/* See LICENSE of license details. */
-
-#include <errno.h>
-#include "stub.h"
-
-int __wrap_openat(int dirfd, const char* name, int flags, int mode)
-{
-  return _stub(ENOENT);
-}

bare-metal-bsp/libwrap/sys/printf.c

@@ -1,278 +0,0 @@
-/* The functions in this file are only meant to support Dhrystone on an
- * embedded RV32 system and are obviously incorrect in general. */
-
-#include <stdarg.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <stdint.h>
-#include <string.h>
-#include <unistd.h>
-
-#undef putchar
-int putchar(int ch)
-{
-  return write(STDOUT_FILENO, &ch, 1) == 1 ? ch : -1;
-}
-
-size_t strnlen (const char *str, size_t n)
-{
-  const char *start = str;
-  while (n-- > 0 && *str) str++;
-  return str - start;
-}
-
-static void sprintf_putch(int ch, void** data)
-{
-  char** pstr = (char**)data;
-  **pstr = ch;
-  (*pstr)++;
-}
-
-static unsigned long getuint(va_list *ap, int lflag)
-{
-  if (lflag)
-    return va_arg(*ap, unsigned long);
-  else
-    return va_arg(*ap, unsigned int);
-}
-
-static long getint(va_list *ap, int lflag)
-{
-  if (lflag)
-    return va_arg(*ap, long);
-  else
-    return va_arg(*ap, int);
-}
-
-static inline void printnum(void (*putch)(int, void**), void **putdat,
-                    unsigned long num, unsigned base, int width, int padc)
-{
-  unsigned digs[sizeof(num)*8];
-  int pos = 0;
-
-  while (1)
-  {
-    digs[pos++] = num % base;
-    if (num < base)
-      break;
-    num /= base;
-  }
-
-  while (width-- > pos)
-    putch(padc, putdat);
-
-  while (pos-- > 0)
-    putch(digs[pos] + (digs[pos] >= 10 ? 'a' - 10 : '0'), putdat);
-}
-
-static inline void print_double(void (*putch)(int, void**), void **putdat,
-                                double num, int width, int prec)
-{
-  union {
-    double d;
-    uint64_t u;
-  } u;
-  u.d = num;
-
-  if (u.u & (1ULL << 63)) {
-    putch('-', putdat);
-    u.u &= ~(1ULL << 63);
-  }
-
-  for (int i = 0; i < prec; i++)
-    u.d *= 10;
-
-  char buf[32], *pbuf = buf;
-  printnum(sprintf_putch, (void**)&pbuf, (unsigned long)u.d, 10, 0, 0);
-  if (prec > 0) {
-    for (int i = 0; i < prec; i++) {
-      pbuf[-i] = pbuf[-i-1];
-    }
-    pbuf[-prec] = '.';
-    pbuf++;
-  }
-
-  for (char* p = buf; p < pbuf; p++)
-    putch(*p, putdat);
-}
-
-static void vprintfmt(void (*putch)(int, void**), void **putdat, const char *fmt, va_list ap)
-{
-  register const char* p;
-  const char* last_fmt;
-  register int ch, err;
-  unsigned long num;
-  int base, lflag, width, precision, altflag;
-  char padc;
-
-  while (1) {
-    while ((ch = *(unsigned char *) fmt) != '%') {
-      if (ch == '\0')
-        return;
-      fmt++;
-      putch(ch, putdat);
-    }
-    fmt++;
-
-    // Process a %-escape sequence
-    last_fmt = fmt;
-    padc = ' ';
-    width = -1;
-    precision = -1;
-    lflag = 0;
-    altflag = 0;
-  reswitch:
-    switch (ch = *(unsigned char *) fmt++) {
-
-    // flag to pad on the right
-    case '-':
-      padc = '-';
-      goto reswitch;
-      
-    // flag to pad with 0's instead of spaces
-    case '0':
-      padc = '0';
-      goto reswitch;
-
-    // width field
-    case '1':
-    case '2':
-    case '3':
-    case '4':
-    case '5':
-    case '6':
-    case '7':
-    case '8':
-    case '9':
-      for (precision = 0; ; ++fmt) {
-        precision = precision * 10 + ch - '0';
-        ch = *fmt;
-        if (ch < '0' || ch > '9')
-          break;
-      }
-      goto process_precision;
-
-    case '*':
-      precision = va_arg(ap, int);
-      goto process_precision;
-
-    case '.':
-      if (width < 0)
-        width = 0;
-      goto reswitch;
-
-    case '#':
-      altflag = 1;
-      goto reswitch;
-
-    process_precision:
-      if (width < 0)
-        width = precision, precision = -1;
-      goto reswitch;
-
-    // long flag
-    case 'l':
-      if (lflag)
-        goto bad;
-      goto reswitch;
-
-    // character
-    case 'c':
-      putch(va_arg(ap, int), putdat);
-      break;
-
-    // double
-    case 'f':
-      print_double(putch, putdat, va_arg(ap, double), width, precision);
-      break;
-
-    // string
-    case 's':
-      if ((p = va_arg(ap, char *)) == NULL)
-        p = "(null)";
-      if (width > 0 && padc != '-')
-        for (width -= strnlen(p, precision); width > 0; width--)
-          putch(padc, putdat);
-      for (; (ch = *p) != '\0' && (precision < 0 || --precision >= 0); width--) {
-        putch(ch, putdat);
-        p++;
-      }
-      for (; width > 0; width--)
-        putch(' ', putdat);
-      break;
-
-    // (signed) decimal
-    case 'd':
-      num = getint(&ap, lflag);
-      if ((long) num < 0) {
-        putch('-', putdat);
-        num = -(long) num;
-      }
-      base = 10;
-      goto signed_number;
-
-    // unsigned decimal
-    case 'u':
-      base = 10;
-      goto unsigned_number;
-
-    // (unsigned) octal
-    case 'o':
-      // should do something with padding so it's always 3 octits
-      base = 8;
-      goto unsigned_number;
-
-    // pointer
-    case 'p':
-      lflag = 1;
-      putch('0', putdat);
-      putch('x', putdat);
-      /* fall through to 'x' */
-
-    // (unsigned) hexadecimal
-    case 'x':
-      base = 16;
-    unsigned_number:
-      num = getuint(&ap, lflag);
-    signed_number:
-      printnum(putch, putdat, num, base, width, padc);
-      break;
-
-    // escaped '%' character
-    case '%':
-      putch(ch, putdat);
-      break;
-      
-    // unrecognized escape sequence - just print it literally
-    default:
-    bad:
-      putch('%', putdat);
-      fmt = last_fmt;
-      break;
-    }
-  }
-}
-
-int __wrap_printf(const char* fmt, ...)
-{
-  va_list ap;
-  va_start(ap, fmt);
-
-  vprintfmt((void*)putchar, 0, fmt, ap);
-
-  va_end(ap);
-  return 0; // incorrect return value, but who cares, anyway?
-}
-
-int __wrap_sprintf(char* str, const char* fmt, ...)
-{
-  va_list ap;
-  char* str0 = str;
-  va_start(ap, fmt);
-
-  vprintfmt(sprintf_putch, (void**)&str, fmt, ap);
-  *str = 0;
-
-  va_end(ap);
-  return str - str0;
-}

bare-metal-bsp/libwrap/sys/puts.c

@@ -1,28 +0,0 @@
-/* See LICENSE of license details. */
-
-#include <stdint.h>
-#include <errno.h>
-#include <unistd.h>
-#include <sys/types.h>
-
-#include "platform.h"
-#include "stub.h"
-#include "weak_under_alias.h"
-
-int __wrap_puts(const char *s)
-{
-  while (*s != '\0') {
-    while (UART0_REG(UART_REG_TXFIFO) & 0x80000000) ;
-    UART0_REG(UART_REG_TXFIFO) = *s;
-
-    if (*s == '\n') {
-      while (UART0_REG(UART_REG_TXFIFO) & 0x80000000) ;
-      UART0_REG(UART_REG_TXFIFO) = '\r';
-    }
-
-    ++s;
-  }
-
-  return 0;
-}
-weak_under_alias(puts);

bare-metal-bsp/libwrap/sys/read.c

@@ -1,33 +0,0 @@
-/* See LICENSE of license details. */
-
-#include <stdint.h>
-#include <errno.h>
-#include <unistd.h>
-#include <sys/types.h>
-
-#include "platform.h"
-#include "stub.h"
-#include "weak_under_alias.h"
-
-ssize_t __wrap_read(int fd, void* ptr, size_t len)
-{
-  uint8_t * current = (uint8_t *)ptr;
-  volatile uint32_t * uart_rx = (uint32_t *)(UART0_BASE_ADDR + UART_REG_RXFIFO);
-  volatile uint8_t * uart_rx_cnt = (uint8_t *)(UART0_BASE_ADDR + UART_REG_RXCTRL + 2);
-
-  ssize_t result = 0;
-
-  if (isatty(fd)) {
-    for (current = (uint8_t *)ptr;
-        (current < ((uint8_t *)ptr) + len) && (*uart_rx_cnt > 0);
-        current ++) {
-      *current = *uart_rx;
-      result++;
-    }
-    return result;
-  }
-
-  return _stub(EBADF);
-}
-weak_under_alias(read);
-

bare-metal-bsp/libwrap/sys/sbrk.c

@@ -1,19 +0,0 @@
-/* See LICENSE of license details. */
-
-#include <stddef.h>
-#include "weak_under_alias.h"
-
-void *__wrap_sbrk(ptrdiff_t incr)
-{
-  extern char _end[];
-  extern char _heap_end[];
-  static char *curbrk = _end;
-
-  if ((curbrk + incr < _end) || (curbrk + incr > _heap_end))
-    return NULL - 1;
-
-  curbrk += incr;
-  return curbrk - incr;
-}
-
-weak_under_alias(sbrk);

bare-metal-bsp/libwrap/sys/stat.c

@@ -1,10 +0,0 @@
-/* See LICENSE of license details. */
-
-#include <errno.h>
-#include <sys/stat.h>
-#include "stub.h"
-
-int __wrap_stat(const char* file, struct stat* st)
-{
-  return _stub(EACCES);
-}

bare-metal-bsp/libwrap/sys/stub.h

@@ -1,10 +0,0 @@
-/* See LICENSE of license details. */
-#ifndef _SIFIVE_SYS_STUB_H
-#define _SIFIVE_SYS_STUB_H
-
-static inline int _stub(int err)
-{
-  return -1;
-}
-
-#endif /* _SIFIVE_SYS_STUB_H */

bare-metal-bsp/libwrap/sys/times.c

@@ -1,10 +0,0 @@
-/* See LICENSE of license details. */
-
-#include <errno.h>
-#include <sys/times.h>
-#include "stub.h"
-
-clock_t __wrap_times(struct tms* buf)
-{
-  return _stub(EACCES);
-}

bare-metal-bsp/libwrap/sys/unlink.c

@@ -1,9 +0,0 @@
-/* See LICENSE of license details. */
-
-#include <errno.h>
-#include "stub.h"
-
-int __wrap_unlink(const char* name)
-{
-  return _stub(ENOENT);
-}

bare-metal-bsp/libwrap/sys/wait.c

@@ -1,9 +0,0 @@
-/* See LICENSE of license details. */
-
-#include <errno.h>
-#include "stub.h"
-
-int wait(int* status)
-{
-  return _stub(ECHILD);
-}

bare-metal-bsp/libwrap/sys/weak_under_alias.h

@@ -1,7 +0,0 @@
-#ifndef _BSP_LIBWRAP_WEAK_UNDER_ALIAS_H
-#define _BSP_LIBWRAP_WEAK_UNDER_ALIAS_H
-
-#define weak_under_alias(name) \
-  extern __typeof (__wrap_##name) __wrap__##name __attribute__ ((weak, alias ("__wrap_"#name)))
-
-#endif

bare-metal-bsp/libwrap/sys/write.c

@@ -1,31 +0,0 @@
-/* See LICENSE of license details. */
-
-#include <stdint.h>
-#include <errno.h>
-#include <unistd.h>
-#include <sys/types.h>
-
-#include "platform.h"
-#include "stub.h"
-#include "weak_under_alias.h"
-
-ssize_t __wrap_write(int fd, const void* ptr, size_t len)
-{
-  const uint8_t * current = (const char *)ptr;
-
-  if (isatty(fd)) {
-    for (size_t jj = 0; jj < len; jj++) {
-      while (UART0_REG(UART_REG_TXFIFO) & 0x80000000) ;
-      UART0_REG(UART_REG_TXFIFO) = current[jj];
-
-      if (current[jj] == '\n') {
-        while (UART0_REG(UART_REG_TXFIFO) & 0x80000000) ;
-        UART0_REG(UART_REG_TXFIFO) = '\r';
-      }
-    }
-    return len;
-  }
-
-  return _stub(EBADF);
-}
-weak_under_alias(write);

benchmarks/coremark/.gitignore

@@ -0,0 +1,4 @@
+*.o
+*.elf
+*.log
+/coremark.*

benchmarks/coremark/Makefile

@@ -0,0 +1,33 @@
+TARGET := coremark
+ISA?=imc
+ITERATIONS?=600 # 300 for TGC
+
+ASM_SRCS := 
+C_SRCS := core_list_join.c core_main.c core_matrix.c core_state.c core_util.c core_portme.c ee_printf.c
+HEADERS := cm/coremark.h
+
+vpath %.c cm
+
+BOARD?=iss
+LINK_TARGET=link
+
+RISCV_ARCH:=rv32$(ISA)
+ifeq ($(ISA),e)
+    RISCV_ABI:=ilp32e
+else
+    RISCV_ABI:=ilp32
+endif
+
+PORT_CFLAGS = -DPERFORMANCE_RUN=1 -DCLOCKS_PER_SEC=10000000 -Wno-pointer-to-int-cast -Wno-int-to-pointer-cast
+PORT_CFLAGS+= -g -O3 -fno-common -funroll-loops -finline-functions -falign-functions=16 -falign-jumps=4 -falign-loops=4 -finline-limit=1000 -fno-if-conversion2 -fselective-scheduling -fno-crossjumping -freorder-blocks-and-partition
+
+FLAGS_STR = "$(PORT_CFLAGS) $(XCFLAGS) $(XLFLAGS) $(LFLAGS_END)"
+
+CFLAGS = $(PORT_CFLAGS) -I. -Icm -DFLAGS_STR=\"$(FLAGS_STR)\"
+CFLAGS += -DITERATIONS=$(ITERATIONS)
+LDFLAGS := -g -Wl,--wrap=scanf -Wl,--wrap=printf -Wl,--wrap=exit -lgcc -lm
+
+TOOL_DIR=$(dir $(compiler))
+
+BSP_BASE = ../../bare-metal-bsp
+include $(BSP_BASE)/env/common-gcc.mk

benchmarks/coremark/core_portme.c

@@ -186,6 +186,7 @@ portable_init(core_portable *p, int *argc, char *argv[])
         ee_printf("ERROR! Please define ee_u32 to a 32b unsigned type!\n");
     }
     p->portable_id = 1;
+    ee_printf("portable_init finished.\n");
 }
 /* Function : portable_fini
         Target specific final code

benchmarks/coremark/ee_printf.c

@@ -659,24 +659,28 @@ ee_vsprintf(char *buf, const char *fmt, va_list args)
     return str - buf;
 }
 
-#define UART0_BASE_ADDR 0xffff0000ULL
-
-#define UART_REG_TXFIFO         0x00
-#define UART_REG_RXFIFO         0x04
-#define UART_REG_TXCTRL         0x08
-#define UART_REG_RXCTRL         0x0c
-#define UART_REG_IE             0x10
-#define UART_REG_IP             0x14
-#define UART_REG_DIV            0x18
-#define UART_TXEN               0x1
-
-#define UART0_REG(ADDR) *((ee_u32*) (UART0_BASE_ADDR + ADDR))
+#include <platform.h>
 
 void
 uart_send_char(char c)
 {
-      while (UART0_REG(UART_REG_TXFIFO) & 0x80000000) ;
-      UART0_REG(UART_REG_TXFIFO) = (unsigned char)c;
+#if defined(BOARD_ehrenberg)
+            while (get_uart_rx_tx_reg_tx_free(uart)==0) ;
+            uart_write(uart, c);
+            if (c == '\n') {
+                while (get_uart_rx_tx_reg_tx_free(uart)==0) ;
+                uart_write(uart, '\r');
+            }
+#elif defined(BOARD_iss)
+            *((uint32_t*) 0xFFFF0000) = c;
+#else
+            while (UART0_REG(UART_REG_TXFIFO) & 0x80000000) ;
+            UART0_REG(UART_REG_TXFIFO) = c;
+            if (c == '\n') {
+                while (UART0_REG(UART_REG_TXFIFO) & 0x80000000) ;
+                UART0_REG(UART_REG_TXFIFO) = '\r';
+            }
+#endif
 }
 
 int

benchmarks/coremark/tgc/core_portme.mak

@@ -1,94 +0,0 @@
-# Copyright 2018 Embedded Microprocessor Benchmark Consortium (EEMBC)
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-# 
-# Original Author: Shay Gal-on
-
-#File : core_portme.mak
-ISA?=imc
-RISCV_ARCH:=rv32$(ISA)
-RISCV_ABI:=ilp32
-
-# Flag : OUTFLAG
-#	Use this flag to define how to to get an executable (e.g -o)
-OUTFLAG= -o
-# Flag : CC
-#	Use this flag to define compiler to use
-CC 		= riscv32-unknown-elf-gcc
-# Flag : LD
-#	Use this flag to define compiler to use
-LD		= riscv32-unknown-elf-gcc
-# Flag : AS
-#	Use this flag to define compiler to use
-AS		= riscv32-unknown-elf-as
-# Flag : CFLAGS
-#	Use this flag to define compiler options. Note, you can add compiler options from the command line using XCFLAGS="other flags"
-PORT_CFLAGS = -march=$(RISCV_ARCH) -mabi=$(RISCV_ABI) -O3 -DCLOCKS_PER_SEC=10000000 -nostdlib -nostartfiles -nodefaultlibs \
- -funroll-loops -fpeel-loops -fgcse-sm -fgcse-las -flto
-FLAGS_STR = "$(PORT_CFLAGS) $(XCFLAGS) $(XLFLAGS) $(LFLAGS_END)"
-CFLAGS = $(PORT_CFLAGS) -I$(PORT_DIR) -I. -DFLAGS_STR=\"$(FLAGS_STR)\" 
-#Flag : LFLAGS_END
-#	Define any libraries needed for linking or other flags that should come at the end of the link line (e.g. linker scripts). 
-#	Note : On certain platforms, the default clock_gettime implementation is supported but requires linking of librt.
-SEPARATE_COMPILE=1
-# Flag : SEPARATE_COMPILE
-# You must also define below how to create an object file, and how to link.
-OBJOUT 	= -o
-LFLAGS 	= 
-#--specs=nano.specs -march=$(RISCV_ARCH) -mabi=$(RISCV_ABI) 
-ASFLAGS =
-OFLAG 	= -o
-COUT 	= -c
-
-LFLAGS_END = 
-# Flag : PORT_SRCS
-# 	Port specific source files can be added here
-#	You may also need cvt.c if the fcvt functions are not provided as intrinsics by your compiler!
-PORT_SRCS = $(PORT_DIR)/core_portme.c $(PORT_DIR)/ee_printf.c
-vpath %.c $(PORT_DIR)
-vpath %.s $(PORT_DIR)
-PORT_OBJS = core_portme.o ee_printf.o
-# Flag : LOAD
-#	For a simple port, we assume self hosted compile and run, no load needed.
-
-# Flag : RUN
-#	For a simple port, we assume self hosted compile and run, simple invocation of the executable
-
-LOAD = echo ""
-RUN = echo ""
-
-OEXT = .o
-EXE = .elf
-
-$(OPATH)$(PORT_DIR)/%$(OEXT) : %.c
-	$(CC) $(CFLAGS) $(XCFLAGS) $(COUT) $< $(OBJOUT) $@
-
-$(OPATH)%$(OEXT) : %.c
-	$(CC) $(CFLAGS) $(XCFLAGS) $(COUT) $< $(OBJOUT) $@
-
-$(OPATH)$(PORT_DIR)/%$(OEXT) : %.s
-	$(AS) $(ASFLAGS) $< $(OBJOUT) $@
-
-# Target : port_pre% and port_post%
-# For the purpose of this simple port, no pre or post steps needed.
-
-.PHONY : port_prebuild port_postbuild port_prerun port_postrun port_preload port_postload
-port_pre% port_post% : 
-
-# FLAG : OPATH
-# Path to the output folder. Default - current folder.
-OPATH = ./
-MKDIR = mkdir -p
-
-dist-clean: clean
-	rm -f *.o

benchmarks/coremark/tgc/tgc.lds

@@ -1,241 +0,0 @@
-OUTPUT_FORMAT("elf32-littleriscv", "elf32-littleriscv", "elf32-littleriscv")
-OUTPUT_ARCH(riscv)
-MEMORY
-{
-   RAM (rwx)  : ORIGIN = 0x0, LENGTH = 128M 
-}
-
-ENTRY(_start)
-
-SECTIONS
-{
-  /* Read-only sections, merged into text segment: */
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-  .note.gnu.build-id  : { *(.note.gnu.build-id) }
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-  .gnu.version_d  : { *(.gnu.version_d) }
-  .gnu.version_r  : { *(.gnu.version_r) }
-  .rela.dyn       :
-    {
-      *(.rela.init)
-      *(.rela.text .rela.text.* .rela.gnu.linkonce.t.*)
-      *(.rela.fini)
-      *(.rela.rodata .rela.rodata.* .rela.gnu.linkonce.r.*)
-      *(.rela.data .rela.data.* .rela.gnu.linkonce.d.*)
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-      PROVIDE_HIDDEN (__rela_iplt_start = .);
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-  .debug_abbrev   0 : { *(.debug_abbrev) }
-  .debug_line     0 : { *(.debug_line .debug_line.* .debug_line_end) }
-  .debug_frame    0 : { *(.debug_frame) }
-  .debug_str      0 : { *(.debug_str) }
-  .debug_loc      0 : { *(.debug_loc) }
-  .debug_macinfo  0 : { *(.debug_macinfo) }
-  /* SGI/MIPS DWARF 2 extensions */
-  .debug_weaknames 0 : { *(.debug_weaknames) }
-  .debug_funcnames 0 : { *(.debug_funcnames) }
-  .debug_typenames 0 : { *(.debug_typenames) }
-  .debug_varnames  0 : { *(.debug_varnames) }
-  /* DWARF 3 */
-  .debug_pubtypes 0 : { *(.debug_pubtypes) }
-  .debug_ranges   0 : { *(.debug_ranges) }
-  /* DWARF Extension.  */
-  .debug_macro    0 : { *(.debug_macro) }
-  .debug_addr     0 : { *(.debug_addr) }
-  .gnu.attributes 0 : { KEEP (*(.gnu.attributes)) }
-  /DISCARD/ : { *(.note.GNU-stack) *(.gnu_debuglink) *(.gnu.lto_*) }
-}

benchmarks/dhrystone/.cproject

@@ -14,7 +14,7 @@
 				</extensions>
 			</storageModule>
 			<storageModule moduleId="cdtBuildSystem" version="4.0.0">
-				<configuration buildProperties="" id="cdt.managedbuild.toolchain.gnu.cross.base.574338120" name="Default" parent="org.eclipse.cdt.build.core.emptycfg">
+				<configuration buildProperties="" id="cdt.managedbuild.toolchain.gnu.cross.base.574338120" name="Default" optionalBuildProperties="" parent="org.eclipse.cdt.build.core.emptycfg">
 					<folderInfo id="cdt.managedbuild.toolchain.gnu.cross.base.574338120.193230058" name="/" resourcePath="">
 						<toolChain id="cdt.managedbuild.toolchain.gnu.cross.base.1380433779" name="Cross GCC" superClass="cdt.managedbuild.toolchain.gnu.cross.base">
 							<option id="cdt.managedbuild.option.gnu.cross.prefix.1116043753" name="Prefix" superClass="cdt.managedbuild.option.gnu.cross.prefix"/>
@@ -57,6 +57,7 @@
 		<buildTargets>
 			<target name="all" path="" targetID="org.eclipse.cdt.build.MakeTargetBuilder">
 				<buildCommand>make</buildCommand>
+				<buildArguments/>
 				<buildTarget>all</buildTarget>
 				<stopOnError>true</stopOnError>
 				<useDefaultCommand>true</useDefaultCommand>
@@ -64,12 +65,27 @@
 			</target>
 			<target name="clean" path="" targetID="org.eclipse.cdt.build.MakeTargetBuilder">
 				<buildCommand>make</buildCommand>
-				<buildArguments/>
 				<buildTarget>clean</buildTarget>
 				<stopOnError>true</stopOnError>
 				<useDefaultCommand>true</useDefaultCommand>
 				<runAllBuilders>true</runAllBuilders>
 			</target>
+			<target name="all BOARD=tgc-vp" path="" targetID="org.eclipse.cdt.build.MakeTargetBuilder">
+				<buildCommand>make</buildCommand>
+				<buildArguments/>
+				<buildTarget>all BOARD=tgc-vp</buildTarget>
+				<stopOnError>true</stopOnError>
+				<useDefaultCommand>true</useDefaultCommand>
+				<runAllBuilders>true</runAllBuilders>
+			</target>
+			<target name="all BOARD=iss" path="" targetID="org.eclipse.cdt.build.MakeTargetBuilder">
+				<buildCommand>make</buildCommand>
+				<buildArguments/>
+				<buildTarget>all BOARD=iss</buildTarget>
+				<stopOnError>true</stopOnError>
+				<useDefaultCommand>true</useDefaultCommand>
+				<runAllBuilders>true</runAllBuilders>
+			</target>
 		</buildTargets>
 	</storageModule>
 </cproject>

benchmarks/dhrystone/.project

@@ -3,7 +3,7 @@
 	<name>dhrystone</name>
 	<comment></comment>
 	<projects>
-		<project>bsp</project>
+		<project>bare-metal-bsp</project>
 	</projects>
 	<buildSpec>
 		<buildCommand>

benchmarks/dhrystone/Makefile

@@ -1,11 +1,12 @@
 TARGET := dhrystone
 ISA?=imc
+ITERATIONS?=50000 # 20000 for TGC
 
 ASM_SRCS := 
-C_SRCS := dhry_stubs.c dhry_printf.c dhry_1.c dhry_2.c
+C_SRCS := dhry_stubs.c dhry_1.c dhry_2.c
 HEADERS := dhry.h
 
-BOARD=iss
+BOARD?=iss
 LINK_TARGET=link
 RISCV_ARCH:=rv32$(ISA)
 ifeq ($(ISA),e)
@@ -14,12 +15,10 @@ else
     RISCV_ABI:=ilp32
 endif
 # '-lgcc -lm' are needed to add softfloat routines
-CFLAGS  := -g -march=$(RISCV_ARCH) -mabi=$(RISCV_ABI) -mcmodel=medlow -O3 -DHZ=32768 -DTIME -DNO_INIT -fno-inline -fno-builtin-printf -fno-common -Wno-implicit \
+CFLAGS  := -g -O3 -DITERATIONS=$(ITERATIONS) -DHZ=32768 -DTIME -DNO_INIT -fno-inline -fno-builtin-printf -fno-common -Wno-implicit \
  -funroll-loops -fpeel-loops -fgcse-sm -fgcse-las
-LDFLAGS := -g -march=$(RISCV_ARCH) -mabi=$(RISCV_ABI) -mcmodel=medlow -Wl,--wrap=scanf -Wl,--wrap=printf -Wl,--wrap=exit -lgcc -lm
 
 TOOL_DIR=$(dir $(compiler))
 
-TRIPLET=riscv32-unknown-elf
 BSP_BASE = ../../bare-metal-bsp
 include $(BSP_BASE)/env/common-gcc.mk

benchmarks/dhrystone/dhry_printf.c

@@ -1,15 +0,0 @@
-/* The functions in this file are only meant to support Dhrystone on an
- * embedded RV32 system and are obviously incorrect in general. */
-
-#include <stdarg.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <stdint.h>
-#include <string.h>
-#include <unistd.h>
-
-//#undef putchar
-//int putchar(int ch)
-//{
-//  return write(1, &ch, 1) == 1 ? ch : -1;
-//}

benchmarks/dhrystone/dhry_stubs.c

@@ -1,4 +1,7 @@
 #include "platform.h"
+#ifndef ITERATIONS
+#define ITERATIONS 20000
+#endif
 
 /* The functions in this file are only meant to support Dhrystone on an
  * embedded RV32 system and are obviously incorrect in general. */
@@ -11,12 +14,12 @@ long time(void)
 // set the number of dhrystone iterations
 void __wrap_scanf(const char* fmt, int* n)
 {
-  *n = 200000;
+  *n = ITERATIONS;
 }
 
 extern volatile uint32_t tohost;
 
-void __wrap_exit(int n){
+void exit(int n){
       tohost = 0x1;
       for (;;);
 }

hello-world/.cproject

@@ -57,7 +57,6 @@
 		<buildTargets>
 			<target name="all" path="" targetID="org.eclipse.cdt.build.MakeTargetBuilder">
 				<buildCommand>make</buildCommand>
-				<buildArguments/>
 				<buildTarget>all</buildTarget>
 				<stopOnError>true</stopOnError>
 				<useDefaultCommand>true</useDefaultCommand>
@@ -65,12 +64,27 @@
 			</target>
 			<target name="clean" path="" targetID="org.eclipse.cdt.build.MakeTargetBuilder">
 				<buildCommand>make</buildCommand>
-				<buildArguments/>
 				<buildTarget>clean</buildTarget>
 				<stopOnError>true</stopOnError>
 				<useDefaultCommand>true</useDefaultCommand>
 				<runAllBuilders>true</runAllBuilders>
 			</target>
+			<target name="clean all BOARD=tgc-vp" path="" targetID="org.eclipse.cdt.build.MakeTargetBuilder">
+				<buildCommand>make</buildCommand>
+				<buildArguments/>
+				<buildTarget>clean all BOARD=tgc-vp</buildTarget>
+				<stopOnError>true</stopOnError>
+				<useDefaultCommand>true</useDefaultCommand>
+				<runAllBuilders>true</runAllBuilders>
+			</target>
+			<target name="clean all BOARD=iss" path="" targetID="org.eclipse.cdt.build.MakeTargetBuilder">
+				<buildCommand>make</buildCommand>
+				<buildArguments/>
+				<buildTarget>clean all BOARD=iss</buildTarget>
+				<stopOnError>true</stopOnError>
+				<useDefaultCommand>true</useDefaultCommand>
+				<runAllBuilders>true</runAllBuilders>
+			</target>
 		</buildTargets>
 	</storageModule>
 </cproject>

hello-world/Makefile

@@ -1,19 +1,26 @@
 
 TARGET  = hello
+ISA?=imc
+
 C_SRCS  = $(wildcard *.c) 
 HEADERS = $(wildcard *.h)
-CFLAGS += -O2 -g 
+OPT ?= -O2
+CFLAGS += $(OPT) -g 
 
 BOARD=iss
 LINK_TARGET=link
-RISCV_ARCH:=rv32i
-RISCV_ABI:=ilp32
+RISCV_ARCH:=rv32$(ISA)
+ifeq ($(ISA),e)
+    RISCV_ABI:=ilp32e
+else
+    RISCV_ABI:=ilp32
+endif
 LDFLAGS += -g -Wl,--wrap=printf
 
-compiler := $(shell which riscv32-unknown-elf-gcc)
+compiler := $(shell which riscv64-unknown-elf-gcc)
 TOOL_DIR=$(dir $(compiler))
 
-TRIPLET=riscv32-unknown-elf
+TRIPLET=riscv64-unknown-elf
 BSP_BASE = ../bare-metal-bsp
 include $(BSP_BASE)/env/common-gcc.mk
 

hello-world/wrap_stubs.c

@@ -1,15 +0,0 @@
-#include "platform.h"
-
-/* The functions in this file are only meant to support Dhrystone on an
- * embedded RV32 system and are obviously incorrect in general. */
-
-long time(void)
-{
-  return get_timer_value() / get_timer_freq();
-}
-
-// set the number of dhrystone iterations
-void __wrap_scanf(const char* fmt, int* n)
-{
-  *n = 100000000;
-}