initial FW setup for Raven validation

feature/fpga-alloc-free
Stanislaw Kaushanski 2 years ago
parent ce24b0f2f2
commit e15e299968
  1. BIN
      hello/hello
  2. 6
      hello/hello.c
  3. 13
      raven/Makefile
  4. 24
      raven/bsp/Debug/drivers/fe300prci/subdir.mk
  5. 24
      raven/bsp/Debug/drivers/plic/subdir.mk
  6. 24
      raven/bsp/Debug/env/freedom-e300-arty/subdir.mk
  7. 27
      raven/bsp/Debug/env/freedom-e300-hifive1/subdir.mk
  8. 27
      raven/bsp/Debug/env/iss/subdir.mk
  9. 27
      raven/bsp/Debug/env/subdir.mk
  10. 27
      raven/bsp/Debug/libwrap/stdlib/subdir.mk
  11. 98
      raven/bsp/Debug/libwrap/sys/subdir.mk
  12. 66
      raven/bsp/Debug/makefile
  13. 8
      raven/bsp/Debug/objects.mk
  14. 35
      raven/bsp/Debug/sources.mk
  15. 252
      raven/bsp/drivers/fe300prci/fe300prci_driver.c
  16. 79
      raven/bsp/drivers/fe300prci/fe300prci_driver.h
  17. 127
      raven/bsp/drivers/plic/plic_driver.c
  18. 51
      raven/bsp/drivers/plic/plic_driver.h
  19. 62
      raven/bsp/env/common.mk
  20. 1313
      raven/bsp/env/encoding.h
  21. 97
      raven/bsp/env/entry.S
  22. 87
      raven/bsp/env/freedom-e300-arty/init.c
  23. 167
      raven/bsp/env/freedom-e300-arty/link.lds
  24. 30
      raven/bsp/env/freedom-e300-arty/openocd.cfg
  25. 125
      raven/bsp/env/freedom-e300-arty/platform.h
  26. 238
      raven/bsp/env/freedom-e300-hifive1/init.c
  27. 167
      raven/bsp/env/freedom-e300-hifive1/link.lds
  28. 34
      raven/bsp/env/freedom-e300-hifive1/openocd.cfg
  29. 133
      raven/bsp/env/freedom-e300-hifive1/platform.h
  30. 79
      raven/bsp/env/hifive1.h
  31. 238
      raven/bsp/env/iss/init.c
  32. 168
      raven/bsp/env/iss/link.lds
  33. 34
      raven/bsp/env/iss/openocd.cfg
  34. 133
      raven/bsp/env/iss/platform.h
  35. 54
      raven/bsp/env/start.S
  36. 35
      raven/bsp/include/sifive/bits.h
  37. 17
      raven/bsp/include/sifive/const.h
  38. 88
      raven/bsp/include/sifive/devices/aon.h
  39. 14
      raven/bsp/include/sifive/devices/clint.h
  40. 24
      raven/bsp/include/sifive/devices/gpio.h
  41. 23
      raven/bsp/include/sifive/devices/otp.h
  42. 31
      raven/bsp/include/sifive/devices/plic.h
  43. 56
      raven/bsp/include/sifive/devices/prci.h
  44. 37
      raven/bsp/include/sifive/devices/pwm.h
  45. 80
      raven/bsp/include/sifive/devices/spi.h
  46. 27
      raven/bsp/include/sifive/devices/uart.h
  47. 16
      raven/bsp/include/sifive/sections.h
  48. 53
      raven/bsp/libwrap/libwrap.mk
  49. 17
      raven/bsp/libwrap/stdlib/malloc.c
  50. 16
      raven/bsp/libwrap/sys/_exit.c
  51. 9
      raven/bsp/libwrap/sys/close.c
  52. 9
      raven/bsp/libwrap/sys/execve.c
  53. 9
      raven/bsp/libwrap/sys/fork.c
  54. 16
      raven/bsp/libwrap/sys/fstat.c
  55. 6
      raven/bsp/libwrap/sys/getpid.c
  56. 11
      raven/bsp/libwrap/sys/isatty.c
  57. 9
      raven/bsp/libwrap/sys/kill.c
  58. 9
      raven/bsp/libwrap/sys/link.c
  59. 14
      raven/bsp/libwrap/sys/lseek.c
  60. 9
      raven/bsp/libwrap/sys/open.c
  61. 9
      raven/bsp/libwrap/sys/openat.c
  62. 30
      raven/bsp/libwrap/sys/read.c
  63. 16
      raven/bsp/libwrap/sys/sbrk.c
  64. 10
      raven/bsp/libwrap/sys/stat.c
  65. 10
      raven/bsp/libwrap/sys/stub.h
  66. 10
      raven/bsp/libwrap/sys/times.c
  67. 9
      raven/bsp/libwrap/sys/unlink.c
  68. 9
      raven/bsp/libwrap/sys/wait.c
  69. 29
      raven/bsp/libwrap/sys/write.c
  70. BIN
      raven/hello_raven
  71. 77
      raven/hello_raven.c
  72. 2246
      raven/hello_raven.dis
  73. 271
      raven/wrap_printf.c

Binary file not shown.

@ -57,12 +57,6 @@ unsigned read_adc(unsigned index){
return result&0x03ff;
}
//int read_csr(int csr_num) __attribute__((always_inline)) {
// int result;
// asm("csrr %0, %1" : "=r"(result) : "I"(csr_num));
// return result;
//}
int main()
{
GPIO_REG(GPIO_IOF_EN) |= 0x30000;

@ -0,0 +1,13 @@
TARGET = hello_raven
C_SRCS += $(wildcard *.c)
CFLAGS += -g
#-fno-builtin-printf
LDFLAGS := -Wl,--wrap=scanf -Wl,--wrap=printf
#BOARD = iss
BOARD=freedom-e300-hifive1
TOOL_DIR=/opt/shared/riscv/FreedomStudio/20180122/SiFive/riscv64-unknown-elf-gcc-20171231-x86_64-linux-centos6/bin
BSP_BASE = ./bsp
include $(BSP_BASE)/env/common.mk

@ -0,0 +1,24 @@
################################################################################
# Automatically-generated file. Do not edit!
################################################################################
# Add inputs and outputs from these tool invocations to the build variables
C_SRCS += \
../drivers/fe300prci/fe300prci_driver.c
OBJS += \
./drivers/fe300prci/fe300prci_driver.o
C_DEPS += \
./drivers/fe300prci/fe300prci_driver.d
# Each subdirectory must supply rules for building sources it contributes
drivers/fe300prci/%.o: ../drivers/fe300prci/%.c
@echo 'Building file: $<'
@echo 'Invoking: Cross GCC Compiler'
riscv32-unknown-elf-gcc -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@)" -o "$@" "$<"
@echo 'Finished building: $<'
@echo ' '

@ -0,0 +1,24 @@
################################################################################
# Automatically-generated file. Do not edit!
################################################################################
# Add inputs and outputs from these tool invocations to the build variables
C_SRCS += \
../drivers/plic/plic_driver.c
OBJS += \
./drivers/plic/plic_driver.o
C_DEPS += \
./drivers/plic/plic_driver.d
# Each subdirectory must supply rules for building sources it contributes
drivers/plic/%.o: ../drivers/plic/%.c
@echo 'Building file: $<'
@echo 'Invoking: Cross GCC Compiler'
riscv32-unknown-elf-gcc -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@)" -o "$@" "$<"
@echo 'Finished building: $<'
@echo ' '

@ -0,0 +1,24 @@
################################################################################
# Automatically-generated file. Do not edit!
################################################################################
# Add inputs and outputs from these tool invocations to the build variables
C_SRCS += \
../env/freedom-e300-arty/init.c
OBJS += \
./env/freedom-e300-arty/init.o
C_DEPS += \
./env/freedom-e300-arty/init.d
# Each subdirectory must supply rules for building sources it contributes
env/freedom-e300-arty/%.o: ../env/freedom-e300-arty/%.c
@echo 'Building file: $<'
@echo 'Invoking: Cross GCC Compiler'
riscv32-unknown-elf-gcc -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@)" -o "$@" "$<"
@echo 'Finished building: $<'
@echo ' '

@ -0,0 +1,27 @@
################################################################################
# Automatically-generated file. Do not edit!
################################################################################
# Add inputs and outputs from these tool invocations to the build variables
C_SRCS += \
../env/freedom-e300-hifive1/init.c
O_SRCS += \
../env/freedom-e300-hifive1/init.o
OBJS += \
./env/freedom-e300-hifive1/init.o
C_DEPS += \
./env/freedom-e300-hifive1/init.d
# Each subdirectory must supply rules for building sources it contributes
env/freedom-e300-hifive1/%.o: ../env/freedom-e300-hifive1/%.c
@echo 'Building file: $<'
@echo 'Invoking: Cross GCC Compiler'
riscv32-unknown-elf-gcc -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@)" -o "$@" "$<"
@echo 'Finished building: $<'
@echo ' '

@ -0,0 +1,27 @@
################################################################################
# Automatically-generated file. Do not edit!
################################################################################
# Add inputs and outputs from these tool invocations to the build variables
C_SRCS += \
../env/iss/init.c
O_SRCS += \
../env/iss/init.o
OBJS += \
./env/iss/init.o
C_DEPS += \
./env/iss/init.d
# Each subdirectory must supply rules for building sources it contributes
env/iss/%.o: ../env/iss/%.c
@echo 'Building file: $<'
@echo 'Invoking: Cross GCC Compiler'
riscv32-unknown-elf-gcc -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@)" -o "$@" "$<"
@echo 'Finished building: $<'
@echo ' '

@ -0,0 +1,27 @@
################################################################################
# Automatically-generated file. Do not edit!
################################################################################
# Add inputs and outputs from these tool invocations to the build variables
O_SRCS += \
../env/entry.o \
../env/start.o
S_UPPER_SRCS += \
../env/entry.S \
../env/start.S
OBJS += \
./env/entry.o \
./env/start.o
# Each subdirectory must supply rules for building sources it contributes
env/%.o: ../env/%.S
@echo 'Building file: $<'
@echo 'Invoking: Cross GCC Assembler'
riscv32-unknown-elf-as -o "$@" "$<"
@echo 'Finished building: $<'
@echo ' '

@ -0,0 +1,27 @@
################################################################################
# Automatically-generated file. Do not edit!
################################################################################
# Add inputs and outputs from these tool invocations to the build variables
C_SRCS += \
../libwrap/stdlib/malloc.c
O_SRCS += \
../libwrap/stdlib/malloc.o
OBJS += \
./libwrap/stdlib/malloc.o
C_DEPS += \
./libwrap/stdlib/malloc.d
# Each subdirectory must supply rules for building sources it contributes
libwrap/stdlib/%.o: ../libwrap/stdlib/%.c
@echo 'Building file: $<'
@echo 'Invoking: Cross GCC Compiler'
riscv32-unknown-elf-gcc -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@)" -o "$@" "$<"
@echo 'Finished building: $<'
@echo ' '

@ -0,0 +1,98 @@
################################################################################
# Automatically-generated file. Do not edit!
################################################################################
# Add inputs and outputs from these tool invocations to the build variables
C_SRCS += \
../libwrap/sys/_exit.c \
../libwrap/sys/close.c \
../libwrap/sys/execve.c \
../libwrap/sys/fork.c \
../libwrap/sys/fstat.c \
../libwrap/sys/getpid.c \
../libwrap/sys/isatty.c \
../libwrap/sys/kill.c \
../libwrap/sys/link.c \
../libwrap/sys/lseek.c \
../libwrap/sys/open.c \
../libwrap/sys/openat.c \
../libwrap/sys/read.c \
../libwrap/sys/sbrk.c \
../libwrap/sys/stat.c \
../libwrap/sys/times.c \
../libwrap/sys/unlink.c \
../libwrap/sys/wait.c \
../libwrap/sys/write.c
O_SRCS += \
../libwrap/sys/_exit.o \
../libwrap/sys/close.o \
../libwrap/sys/execve.o \
../libwrap/sys/fork.o \
../libwrap/sys/fstat.o \
../libwrap/sys/getpid.o \
../libwrap/sys/isatty.o \
../libwrap/sys/kill.o \
../libwrap/sys/link.o \
../libwrap/sys/lseek.o \
../libwrap/sys/open.o \
../libwrap/sys/read.o \
../libwrap/sys/sbrk.o \
../libwrap/sys/stat.o \
../libwrap/sys/times.o \
../libwrap/sys/unlink.o \
../libwrap/sys/wait.o \
../libwrap/sys/write.o
OBJS += \
./libwrap/sys/_exit.o \
./libwrap/sys/close.o \
./libwrap/sys/execve.o \
./libwrap/sys/fork.o \
./libwrap/sys/fstat.o \
./libwrap/sys/getpid.o \
./libwrap/sys/isatty.o \
./libwrap/sys/kill.o \
./libwrap/sys/link.o \
./libwrap/sys/lseek.o \
./libwrap/sys/open.o \
./libwrap/sys/openat.o \
./libwrap/sys/read.o \
./libwrap/sys/sbrk.o \
./libwrap/sys/stat.o \
./libwrap/sys/times.o \
./libwrap/sys/unlink.o \
./libwrap/sys/wait.o \
./libwrap/sys/write.o
C_DEPS += \
./libwrap/sys/_exit.d \
./libwrap/sys/close.d \
./libwrap/sys/execve.d \
./libwrap/sys/fork.d \
./libwrap/sys/fstat.d \
./libwrap/sys/getpid.d \
./libwrap/sys/isatty.d \
./libwrap/sys/kill.d \
./libwrap/sys/link.d \
./libwrap/sys/lseek.d \
./libwrap/sys/open.d \
./libwrap/sys/openat.d \
./libwrap/sys/read.d \
./libwrap/sys/sbrk.d \
./libwrap/sys/stat.d \
./libwrap/sys/times.d \
./libwrap/sys/unlink.d \
./libwrap/sys/wait.d \
./libwrap/sys/write.d
# Each subdirectory must supply rules for building sources it contributes
libwrap/sys/%.o: ../libwrap/sys/%.c
@echo 'Building file: $<'
@echo 'Invoking: Cross GCC Compiler'
riscv32-unknown-elf-gcc -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@)" -o "$@" "$<"
@echo 'Finished building: $<'
@echo ' '

@ -0,0 +1,66 @@
################################################################################
# Automatically-generated file. Do not edit!
################################################################################
-include ../makefile.init
RM := rm -rf
# All of the sources participating in the build are defined here
-include sources.mk
-include libwrap/sys/subdir.mk
-include libwrap/stdlib/subdir.mk
-include libwrap/misc/subdir.mk
-include env/iss/subdir.mk
-include env/freedom-e300-hifive1/subdir.mk
-include env/freedom-e300-arty/subdir.mk
-include env/subdir.mk
-include drivers/plic/subdir.mk
-include drivers/fe300prci/subdir.mk
-include subdir.mk
-include objects.mk
ifneq ($(MAKECMDGOALS),clean)
ifneq ($(strip $(CC_DEPS)),)
-include $(CC_DEPS)
endif
ifneq ($(strip $(C++_DEPS)),)
-include $(C++_DEPS)
endif
ifneq ($(strip $(C_UPPER_DEPS)),)
-include $(C_UPPER_DEPS)
endif
ifneq ($(strip $(CXX_DEPS)),)
-include $(CXX_DEPS)
endif
ifneq ($(strip $(C_DEPS)),)
-include $(C_DEPS)
endif
ifneq ($(strip $(CPP_DEPS)),)
-include $(CPP_DEPS)
endif
endif
-include ../makefile.defs
# Add inputs and outputs from these tool invocations to the build variables
# All Target
all: bsp
# Tool invocations
bsp: $(OBJS) $(USER_OBJS)
@echo 'Building target: $@'
@echo 'Invoking: Cross G++ Linker'
riscv32-unknown-elf-g++ -o "bsp" $(OBJS) $(USER_OBJS) $(LIBS)
@echo 'Finished building target: $@'
@echo ' '
# Other Targets
clean:
-$(RM) $(CC_DEPS)$(C++_DEPS)$(EXECUTABLES)$(OBJS)$(C_UPPER_DEPS)$(CXX_DEPS)$(C_DEPS)$(CPP_DEPS) bsp
-@echo ' '
.PHONY: all clean dependents
-include ../makefile.targets

@ -0,0 +1,8 @@
################################################################################
# Automatically-generated file. Do not edit!
################################################################################
USER_OBJS :=
LIBS :=

@ -0,0 +1,35 @@
################################################################################
# Automatically-generated file. Do not edit!
################################################################################
C_UPPER_SRCS :=
CXX_SRCS :=
C++_SRCS :=
OBJ_SRCS :=
CC_SRCS :=
ASM_SRCS :=
C_SRCS :=
CPP_SRCS :=
O_SRCS :=
S_UPPER_SRCS :=
CC_DEPS :=
C++_DEPS :=
EXECUTABLES :=
OBJS :=
C_UPPER_DEPS :=
CXX_DEPS :=
C_DEPS :=
CPP_DEPS :=
# Every subdirectory with source files must be described here
SUBDIRS := \
drivers/fe300prci \
drivers/plic \
env \
env/freedom-e300-arty \
env/freedom-e300-hifive1 \
env/iss \
libwrap/misc \
libwrap/stdlib \
libwrap/sys \

@ -0,0 +1,252 @@
// 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

@ -0,0 +1,79 @@
// 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

@ -0,0 +1,127 @@
// 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;
}

@ -0,0 +1,51 @@
// 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

@ -0,0 +1,62 @@
# See LICENSE for license details.
ifndef _SIFIVE_MK_COMMON
_SIFIVE_MK_COMMON := # defined
.PHONY: all
all: $(TARGET)
include $(BSP_BASE)/libwrap/libwrap.mk
BOARD ?= freedom-e300-hifive1
ENV_DIR = $(BSP_BASE)/env
PLATFORM_DIR = $(ENV_DIR)/$(BOARD)
#TARGET_FLAVOR := -march=rv32imac -mabi=ilp32 -mcmodel=medany -msmall-data-limit=8 -x assembler-with-cpp
TARGET_FLAVOR := -march=rv32i -mabi=ilp32
ASM_SRCS += $(ENV_DIR)/start.S
ASM_SRCS += $(ENV_DIR)/entry.S
C_SRCS += $(PLATFORM_DIR)/init.c
LINKER_SCRIPT := $(PLATFORM_DIR)/link.lds
INCLUDES += -I$(BSP_BASE)/include
INCLUDES += -I$(BSP_BASE)/drivers/
INCLUDES += -I$(ENV_DIR)
INCLUDES += -I$(PLATFORM_DIR)
TOOL_DIR ?= $(BSP_BASE)/../toolchain/bin
CC := $(TOOL_DIR)/riscv64-unknown-elf-gcc ${TARGET_FLAVOR}
AR := $(TOOL_DIR)/riscv64-unknown-elf-ar
OBJDUMP := $(TOOL_DIR)/riscv64-unknown-elf-objdump
LDFLAGS += -T $(LINKER_SCRIPT) -nostartfiles
LDFLAGS += -L$(ENV_DIR)
ASM_OBJS := $(ASM_SRCS:.S=.o)
C_OBJS := $(C_SRCS:.c=.o)
LINK_OBJS += $(ASM_OBJS) $(C_OBJS)
LINK_DEPS += $(LINKER_SCRIPT)
CLEAN_OBJS += $(TARGET) $(LINK_OBJS)
CFLAGS += -g
$(TARGET): $(LINK_OBJS) $(LINK_DEPS)
$(CC) $(CFLAGS) $(INCLUDES) $(LINK_OBJS) -o $@ $(LDFLAGS)
$(OBJDUMP) -d $(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 $@ $<
.PHONY: clean
clean:
rm -f $(CLEAN_OBJS)
endif # _SIFIVE_MK_COMMON

File diff suppressed because it is too large Load Diff

@ -0,0 +1,97 @@
// See LICENSE for license details
#ifndef ENTRY_S
#define ENTRY_S
#include "encoding.h"
#include "sifive/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)
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)
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)
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)
addi sp, sp, 32*REGBYTES
mret
.weak handle_trap
handle_trap:
1:
j 1b
#endif

@ -0,0 +1,87 @@
//See LICENSE for license details.
#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 get_cpu_freq()
{
return 65000000;
}
unsigned long get_timer_freq()
{
return get_cpu_freq();
}
uint64_t get_timer_value()
{
#if __riscv_xlen == 32
while (1) {
uint32_t hi = read_csr(mcycleh);
uint32_t lo = read_csr(mcycle);
if (hi == read_csr(mcycleh))
return ((uint64_t)hi << 32) | lo;
}
#else
return read_csr(mcycle);
#endif
}
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, "Unhandled Trap:\n", 16);
_exit(1 + mcause);
}
return epc;
}
void _init()
{
#ifndef NO_INIT
uart_init(115200);
printf("core freq at %d Hz\n", get_cpu_freq());
write_csr(mtvec, &trap_entry);
#endif
}
void _fini()
{
}

@ -0,0 +1,167 @@
OUTPUT_ARCH( "riscv" )
ENTRY( _start )
MEMORY
{
flash (rxai!w) : ORIGIN = 0x20400000, LENGTH = 512M
ram (wxa!ri) : ORIGIN = 0x80000000, LENGTH = 16K
}
PHDRS
{
flash PT_LOAD;
ram_init PT_LOAD;
ram PT_NULL;
}
SECTIONS
{
__stack_size = DEFINED(__stack_size) ? __stack_size : 2K;
.init :
{
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 .data.*)