env/tgc-vp/.gitignore

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

env/tgc-vp/init.c

@@ -0,0 +1,116 @@
+#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){
+
+}
+
+static void uart_init(size_t baud_rate)
+{
+  GPIO_REG(GPIO_IOF_SEL) &= ~IOF0_UART0_MASK;
+  GPIO_REG(GPIO_IOF_EN) |= IOF0_UART0_MASK;
+  UART0_REG(UART_REG_DIV) = get_cpu_freq() / baud_rate - 1;
+  UART0_REG(UART_REG_TXCTRL) |= UART_TXEN;
+}
+
+#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();
+  uart_init(115200);
+  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()
+{
+}

env/tgc-vp/link.lds

@@ -0,0 +1,174 @@
+OUTPUT_ARCH( "riscv" )
+
+ENTRY( _start )
+
+MEMORY
+{
+  flash (rxai!w) : ORIGIN = 0x20000000, LENGTH = 512M
+  ram (wxa!ri) :   ORIGIN = 0x80000000, LENGTH = 128K
+}
+
+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 );
+}

env/tgc-vp/platform.h

@@ -0,0 +1,127 @@
+// 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 "bits.h"
+#include "tgc-vp/devices/aon.h"
+#include "tgc-vp/devices/clint.h"
+#include "tgc-vp/devices/gpio.h"
+#include "tgc-vp/devices/otp.h"
+#include "tgc-vp/devices/plic.h"
+#include "tgc-vp/devices/prci.h"
+#include "tgc-vp/devices/pwm.h"
+#include "tgc-vp/devices/spi.h"
+#include "tgc-vp/devices/uart.h"
+
+/****************************************************************************
+ * Platform definitions
+ *****************************************************************************/
+
+// Memory map
+#define MASKROM_BASE_ADDR _AC(0x00001000,UL)
+#define TRAPVEC_TABLE_BASE_ADDR _AC(0x00001010,UL)
+#define OTP_MMAP_ADDR _AC(0x00020000,UL)
+#define CLINT_BASE_ADDR _AC(0x02000000,UL)
+#define PLIC_BASE_ADDR _AC(0x0C000000,UL)
+#define AON_BASE_ADDR _AC(0x10000000,UL)
+#define PRCI_BASE_ADDR _AC(0x10008000,UL)
+#define OTP_BASE_ADDR _AC(0x10010000,UL)
+#define GPIO_BASE_ADDR _AC(0x10012000,UL)
+#define UART0_BASE_ADDR _AC(0x10013000,UL)
+#define SPI0_BASE_ADDR _AC(0x10014000,UL)
+#define PWM0_BASE_ADDR _AC(0x10015000,UL)
+#define UART1_BASE_ADDR _AC(0x10023000,UL)
+#define SPI1_BASE_ADDR _AC(0x10024000,UL)
+#define PWM1_BASE_ADDR _AC(0x10025000,UL)
+#define SPI2_BASE_ADDR _AC(0x10034000,UL)
+#define PWM2_BASE_ADDR _AC(0x10035000,UL)
+#define SPI0_MMAP_ADDR _AC(0x20000000,UL)
+#define MEM_BASE_ADDR _AC(0x80000000,UL)
+
+// IOF masks
+#define IOF0_SPI1_MASK          _AC(0x000007FC,UL)
+#define SPI11_NUM_SS     (4)
+#define IOF_SPI1_SS0          (2u)
+#define IOF_SPI1_SS1          (8u)
+#define IOF_SPI1_SS2          (9u)
+#define IOF_SPI1_SS3          (10u)
+#define IOF_SPI1_MOSI         (3u)
+#define IOF_SPI1_MISO         (4u)
+#define IOF_SPI1_SCK          (5u)
+#define IOF_SPI1_DQ0          (3u)
+#define IOF_SPI1_DQ1          (4u)
+#define IOF_SPI1_DQ2          (6u)
+#define IOF_SPI1_DQ3          (7u)
+
+#define IOF0_SPI2_MASK          _AC(0xFC000000,UL)
+#define SPI2_NUM_SS       (1)
+#define IOF_SPI2_SS0          (26u)
+#define IOF_SPI2_MOSI         (27u)
+#define IOF_SPI2_MISO         (28u)
+#define IOF_SPI2_SCK          (29u)
+#define IOF_SPI2_DQ0          (27u)
+#define IOF_SPI2_DQ1          (28u)
+#define IOF_SPI2_DQ2          (30u)
+#define IOF_SPI2_DQ3          (31u)
+
+//#define IOF0_I2C_MASK          _AC(0x00003000,UL)
+
+#define IOF0_UART0_MASK         _AC(0x00030000, UL)
+#define IOF_UART0_RX   (16u)
+#define IOF_UART0_TX   (17u)
+
+#define IOF0_UART1_MASK         _AC(0x03000000, UL)
+#define IOF_UART1_RX (24u)
+#define IOF_UART1_TX (25u)
+
+#define IOF1_PWM0_MASK          _AC(0x0000000F, UL)
+#define IOF1_PWM1_MASK          _AC(0x00780000, UL)
+#define IOF1_PWM2_MASK          _AC(0x00003C00, UL)
+
+// Interrupt numbers
+#define INT_RESERVED 0
+#define INT_WDOGCMP 1
+#define INT_RTCCMP 2
+#define INT_UART0_BASE 3
+#define INT_UART1_BASE 4
+#define INT_SPI0_BASE 5
+#define INT_SPI1_BASE 6
+#define INT_SPI2_BASE 7
+#define INT_GPIO_BASE 8
+#define INT_PWM0_BASE 40
+#define INT_PWM1_BASE 44
+#define INT_PWM2_BASE 48
+
+// Helper functions
+#define _REG32(p, i) (*(volatile uint32_t *) ((p) + (i)))
+#define _REG32P(p, i) ((volatile uint32_t *) ((p) + (i)))
+#define AON_REG(offset) _REG32(AON_BASE_ADDR, offset)
+#define CLINT_REG(offset) _REG32(CLINT_BASE_ADDR, offset)
+#define GPIO_REG(offset) _REG32(GPIO_BASE_ADDR, offset)
+#define OTP_REG(offset)  _REG32(OTP_BASE_ADDR, offset)
+#define PLIC_REG(offset) _REG32(PLIC_BASE_ADDR, offset)
+#define PRCI_REG(offset) _REG32(PRCI_BASE_ADDR, offset)
+#define PWM0_REG(offset) _REG32(PWM0_BASE_ADDR, offset)
+#define PWM1_REG(offset) _REG32(PWM1_BASE_ADDR, offset)
+#define PWM2_REG(offset) _REG32(PWM2_BASE_ADDR, offset)
+#define SPI0_REG(offset) _REG32(SPI0_BASE_ADDR, offset)
+#define SPI1_REG(offset) _REG32(SPI1_BASE_ADDR, offset)
+#define SPI2_REG(offset) _REG32(SPI2_BASE_ADDR, offset)
+#define UART0_REG(offset) _REG32(UART0_BASE_ADDR, offset)
+#define UART1_REG(offset) _REG32(UART1_BASE_ADDR, offset)
+
+// 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 */

env/tgc_vp

@@ -1 +0,0 @@
-ehrenberg/

include/ehrenberg/devices/timer.h

@@ -1,18 +1,20 @@
 #ifndef _BSP_TIMER_H
 #define _BSP_TIMER_H
 
-#include "gen/Apb3Timer.h"
 #include <stdint.h>
+#include "gen/Apb3Timer.h"
 
-inline void prescaler_init(apb3timer_t *reg, uint16_t value) {
+#define timer_t apb3timer_t
+
+inline void prescaler_init(timer_t* reg, uint16_t value){
     set_timer_prescaler(reg, value);
 }
 
-inline void timer_t0__init(apb3timer_t *reg) {
+inline void timer_t0__init(timer_t *reg){
     set_timer_t0_overflow(reg, 0xffffffff);
 }
 
-inline void timer_t1__init(apb3timer_t *reg) {
+inline void timer_t1__init(timer_t *reg){
     set_timer_t1_overflow(reg, 0xffffffff);
 }
 

libwrap/sys/puts.c

@@ -1,32 +1,30 @@
 /* See LICENSE of license details. */
 
-#include <errno.h>
 #include <stdint.h>
-#include <sys/types.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) {
+int __wrap_puts(const char *s)
+{
   while (*s != '\0') {
-#if defined(BOARD_ehrenberg) || defined(BOARD_tgc_vp)
-    while (get_uart_rx_tx_reg_tx_free(uart) == 0)
-      ;
+#if defined(BOARD_ehrenberg)
+    while (get_uart_rx_tx_reg_tx_free(uart)==0) ;
     uart_write(uart, *s);
 #elif defined(BOARD_iss)
-    *((uint32_t *)0xFFFF0000) = *s;
+            *((uint32_t*) 0xFFFF0000) = *s;
 #elif defined(BOARD_TGCP)
-    // TODO: implement
+            //TODO: implement
 #else
-    while (UART0_REG(UART_REG_TXFIFO) & 0x80000000)
-      ;
+    while (UART0_REG(UART_REG_TXFIFO) & 0x80000000) ;
     UART0_REG(UART_REG_TXFIFO) = *s;
 
     if (*s == '\n') {
-      while (UART0_REG(UART_REG_TXFIFO) & 0x80000000)
-        ;
+      while (UART0_REG(UART_REG_TXFIFO) & 0x80000000) ;
       UART0_REG(UART_REG_TXFIFO) = '\r';
     }
 #endif

libwrap/sys/read.c

@@ -1,48 +1,52 @@
 /* See LICENSE of license details. */
 
+#include <stdint.h>
+#include <errno.h>
+#include <unistd.h>
+#include <sys/types.h>
+#if defined(BOARD_ehrenberg)
+#include "platform.h"
+#endif
 #include "platform.h"
 #include "stub.h"
 #include "weak_under_alias.h"
-#include <errno.h>
-#include <stdint.h>
-#include <sys/types.h>
-#include <unistd.h>
 
-ssize_t __wrap_read(int fd, void *ptr, size_t len) {
-  uint8_t *current = (uint8_t *)ptr;
+ssize_t __wrap_read(int fd, void* ptr, size_t len)
+{
+    uint8_t * current = (uint8_t *)ptr;
 #if defined(BOARD_hifive1)
-  volatile uint32_t *uart_rx = (uint32_t *)(UART0_CTRL_ADDR + UART_REG_RXFIFO);
-  volatile uint8_t *uart_rx_cnt =
-      (uint8_t *)(UART0_CTRL_ADDR + UART_REG_RXCTRL + 2);
+    volatile uint32_t * uart_rx = (uint32_t *)(UART0_CTRL_ADDR + UART_REG_RXFIFO);
+    volatile uint8_t * uart_rx_cnt = (uint8_t *)(UART0_CTRL_ADDR + UART_REG_RXCTRL + 2);
 #elif defined(BOARD_iss)
-  volatile uint32_t *uart_rx = (uint32_t *)0xFFFF0000;
+    volatile uint32_t * uart_rx = (uint32_t*)0xFFFF0000;
 #elif defined(BOARD_TGCP)
-  // TODO: implement
-#elif !defined(BOARD_ehrenberg) && !defined(BOARD_tgc_vp)
-  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);
+    //TODO: implement
+#elif !defined(BOARD_ehrenberg)
+    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);
 #endif
     ssize_t result = 0;
     if (isatty(fd)) {
-#if defined(BOARD_ehrenberg) || defined(BOARD_tgc_vp)
-    for (current = (uint8_t *)ptr; (current < ((uint8_t *)ptr) + len) &&
-                                   (get_uart_rx_tx_reg_rx_avail(uart) > 0);
-         current++) {
+#if defined(BOARD_ehrenberg)
+        for (current = (uint8_t *)ptr;
+            (current < ((uint8_t *)ptr) + len) && (get_uart_rx_tx_reg_rx_avail(uart) > 0);
+            current ++) {
           *current = uart_read(uart);
           result++;
         }
 #elif defined(BOARD_iss)
-    for (current = (uint8_t *)ptr; (current < ((uint8_t *)ptr) + len);
-         current++) {
+    for (current = (uint8_t *)ptr;
+                (current < ((uint8_t *)ptr) + len);
+                current ++) {
             *current = *uart_rx;
             result++;
         }
 #elif defined(BOARD_TGCP)
-    // TODO: implement
+    //TODO: implement
 #else
         for (current = (uint8_t *)ptr;
-         (current < ((uint8_t *)ptr) + len) && (*uart_rx_cnt > 0); current++) {
+                (current < ((uint8_t *)ptr) + len) && (*uart_rx_cnt > 0);
+                current ++) {
             *current = *uart_rx;
             result++;
         }
@@ -52,3 +56,4 @@ ssize_t __wrap_read(int fd, void *ptr, size_t len) {
     return _stub(EBADF);
 }
 weak_under_alias(read);
+

libwrap/sys/write.c

@@ -1,38 +1,35 @@
 /* See LICENSE of license details. */
 
-#include <errno.h>
 #include <stdint.h>
-#include <sys/types.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 uint8_t *)ptr;
+ssize_t __wrap_write(int fd, const void* ptr, size_t len)
+{
+    const uint8_t * current = (const uint8_t *)ptr;
     if (isatty(fd)) {
         for (size_t jj = 0; jj < len; jj++) {
-#if defined(BOARD_ehrenberg) || defined(BOARD_tgc_vp)
-      while (get_uart_rx_tx_reg_tx_free(uart) == 0)
-        ;
+#if defined(BOARD_ehrenberg)
+            while (get_uart_rx_tx_reg_tx_free(uart)==0) ;
             uart_write(uart, current[jj]);
             if (current[jj] == '\n') {
-        while (get_uart_rx_tx_reg_tx_free(uart) == 0)
-          ;
+                while (get_uart_rx_tx_reg_tx_free(uart)==0) ;
                 uart_write(uart, '\r');
             }
 #elif defined(BOARD_iss)
-      *((uint32_t *)0xFFFF0000) = current[jj];
+            *((uint32_t*) 0xFFFF0000) = current[jj];
 #elif defined(BOARD_TGCP)
-      // TODO: implement
+            //TODO: implement
 #else
-      while (UART0_REG(UART_REG_TXFIFO) & 0x80000000)
-        ;
+            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)
-          ;
+                while (UART0_REG(UART_REG_TXFIFO) & 0x80000000) ;
                 UART0_REG(UART_REG_TXFIFO) = '\r';
             }
 #endif