mirror of
https://github.com/lowRISC/ibex.git
synced 2025-04-22 12:57:13 -04:00
added tinyprintf in the SW
This commit is contained in:
darotsr
parent
5f9e027763
commit
e212b7dfed
13 changed files with 1484 additions and 3 deletions
38
isolde/sw/simple_system/bsp/Makefile
Normal file
38
isolde/sw/simple_system/bsp/Makefile
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@ -0,0 +1,38 @@
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CV_SW_TOOLCHAIN ?= /opt/riscv
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RISCV ?= $(CV_SW_TOOLCHAIN)
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RISCV_EXE_PREFIX ?= $(RISCV)/bin/riscv32-unknown-elf-
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RISCV_GCC = $(RISCV_EXE_PREFIX)gcc
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RISCV_AR = $(RISCV_EXE_PREFIX)ar
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SRC = crt0.S simple_system_common.c startup.c tinyprintf.c
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OBJ = crt0.o simple_system_common.o startup.o tinyprintf.o
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LIBCV-VERIF = libcv-verif.a
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TINY_PRINTF_FLAGS += -DTINYPRINTF_DEFINE_TFP_PRINTF
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TINY_PRINTF_FLAGS += -DTINYPRINTF_DEFINE_TFP_SPRINTF
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CFLAGS ?= -Os -g -static -mabi=ilp32 -march=$(CV_SW_MARCH) $(TINY_PRINTF_FLAGS) -ffunction-sections -fdata-sections -Wall -pedantic
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all: $(LIBCV-VERIF)
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$(LIBCV-VERIF): $(OBJ)
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$(RISCV_AR) rcs $@ $(OBJ)
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%.o : %.c
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$(RISCV_GCC) $(CFLAGS) -c $< -o $@
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%.o : %.S
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$(RISCV_GCC) $(CFLAGS) -c $< -o $@
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clean:
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rm -f $(OBJ) $(LIBCV-VERIF)
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vars:
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@echo "make bsp variables:"
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@echo " CV_SW_TOOLCHAIN = $(CV_SW_TOOLCHAIN)"
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@echo " CV_SW_MARCH = $(CV_SW_MARCH)"
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@echo " RISCV = $(RISCV)"
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@echo " RISCV_EXE_PREFIX = $(RISCV_EXE_PREFIX)"
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@echo " RISCV_GCC = $(RISCV_GCC)"
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@echo " RISCV_MARCH = $(RISCV_MARCH)"
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103
isolde/sw/simple_system/bsp/common-llvm.mk
Normal file
103
isolde/sw/simple_system/bsp/common-llvm.mk
Normal file
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@ -0,0 +1,103 @@
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# Copyright lowRISC contributors.
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# Licensed under the Apache License, Version 2.0, see LICENSE for details.
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# SPDX-License-Identifier: Apache-2.0
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COMMON_DIR := $(shell dirname $(realpath $(lastword $(MAKEFILE_LIST))))
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COMMON_SRCS = $(wildcard $(COMMON_DIR)/*.c)
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INCS := -I$(COMMON_DIR)
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TARGET := riscv32
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ARCH := rv32g
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RISCV_ABI := ilp32
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RISCV_WARNINGS += -Wunused-variable -Wall -Wextra -Wno-unused-command-line-argument # -Werror
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LLVM_FLAGS ?= --target=$(TARGET) -march=$(ARCH) -menable-experimental-extensions -mabi=$(RISCV_ABI) -mno-relax
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RISCV_FLAGS ?= $(LLVM_FLAGS) -mcmodel=medany -O3 -ffast-math -g $(RISCV_WARNINGS)
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RISCV_CCFLAGS ?= $(RISCV_FLAGS) -ffunction-sections -fdata-sections -std=gnu99 -nostdlib -nostartfiles
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RISCV_CXXFLAGS ?= $(RISCV_FLAGS) -ffunction-sections -fdata-sections
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RISCV_LDFLAGS ?= -static -nostdlib
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LINKER_SCRIPT ?= $(COMMON_DIR)/link.ld
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CFLAGS ?= -march=$(ARCH) -mabi=ilp32 -static -mcmodel=medany -Wall -g -O3\
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-fvisibility=hidden -nostdlib -nostartfiles -ffreestanding $(PROGRAM_CFLAGS)
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ifdef PROGRAM
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PROGRAM_C := $(PROGRAM).c
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endif
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SRCS = $(COMMON_SRCS) $(PROGRAM_C) $(EXTRA_SRCS)
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C_SRCS = $(filter %.c, $(SRCS))
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ASM_SRCS = $(filter %.S, $(SRCS))
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CC := $(LLVM_TOOLCHAIN)/clang
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LD := $(LLVM_TOOLCHAIN)/riscv32-unknown-elf-ld
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#LD := $(LLVM_TOOLCHAIN)/ld.lld
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#LD := $(GCC_TOOLCHAIN)/riscv32-unknown-elf-gcc
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#OBJCOPY := $(LLVM_TOOLCHAIN)/llvm-objcopy
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OBJDUMP := $(GCC_TOOLCHAIN)/riscv32-unknown-elf-objdump
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#OBJDUMP := $(LLVM_TOOLCHAIN)/llvm-objdump
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CRT ?= $(COMMON_DIR)/crt0.S
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OBJS := ${C_SRCS:.c=.o} ${ASM_SRCS:.S=.o} ${CRT:.S=.o}
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DEPS = $(OBJS:%.o=%.d)
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ifdef PROGRAM
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OUTFILES := $(PROGRAM).elf
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else
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OUTFILES := $(OBJS)
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endif
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all: $(OUTFILES)
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ifdef PROGRAM
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$(PROGRAM).elf: $(OBJS) $(LINKER_SCRIPT)
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# $(LD) $(CFLAGS) -T $(LINKER_SCRIPT) $(OBJS) -o $@ $(LIBS)
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$(LD) $(RISCV_LDFLAGS) -Map $@.map -T $(LINKER_SCRIPT) $(OBJS) -o $@ $(LIBS)
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$(OBJDUMP) -dh $@ >$@.headers
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.PHONY: disassemble
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disassemble: $(PROGRAM).dis
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endif
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%.dis: %.elf
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$(OBJDUMP) -fhSD $^ > $@
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# Note: this target requires the srecord package to be installed.
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# XXX: This could be replaced by objcopy once
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# https://sourceware.org/bugzilla/show_bug.cgi?id=19921
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# is widely available.
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%.vmem: %.bin
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srec_cat $^ -binary -offset 0x0000 -byte-swap 4 -o $@ -vmem
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%.bin: %.elf
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$(OBJCOPY) -O binary $^ $@
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%.o: %.c
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$(CC) -c $(RISCV_CCFLAGS) $(INCS) -o $@ $<
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# Rule to compile C to assembly
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%.s: %.c
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$(CC) -S $(RISCV_CCFLAGS) $(INCS) -o $@ $<
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%.o: %.S
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$(CC) -c $(RISCV_CCFLAGS) $(INCS) -o $@ $<
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clean:
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$(RM) -f $(OBJS) $(DEPS)
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rm -f *.bin *.vmem *.elf *.headers
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distclean: clean
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$(RM) -f $(OUTFILES)
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84
isolde/sw/simple_system/bsp/common.mk
Normal file
84
isolde/sw/simple_system/bsp/common.mk
Normal file
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@ -0,0 +1,84 @@
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# Copyright lowRISC contributors.
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# Licensed under the Apache License, Version 2.0, see LICENSE for details.
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# SPDX-License-Identifier: Apache-2.0
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COMMON_DIR := $(shell dirname $(realpath $(lastword $(MAKEFILE_LIST))))
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COMMON_SRCS = $(wildcard $(COMMON_DIR)/*.c)
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INCS := -I$(COMMON_DIR)
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# ARCH = rv32im # to disable compressed instructions
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ARCH ?= rv32im_zicsr
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ifdef PROGRAM
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PROGRAM_C := $(PROGRAM).c
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endif
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SRCS = $(COMMON_SRCS) $(PROGRAM_C) $(EXTRA_SRCS)
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C_SRCS = $(filter %.c, $(SRCS))
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ASM_SRCS = $(filter %.S, $(SRCS))
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CC = riscv32-unknown-elf-gcc
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CROSS_COMPILE = $(patsubst %-gcc,%-,$(CC))
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OBJCOPY ?= $(CROSS_COMPILE)objcopy
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OBJDUMP ?= $(CROSS_COMPILE)objdump
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LINKER_SCRIPT ?= $(COMMON_DIR)/link.ld
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CRT ?= $(COMMON_DIR)/crt0.S
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TINY_PRINTF_FLAGS += -DTINYPRINTF_DEFINE_TFP_PRINTF
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TINY_PRINTF_FLAGS += -DTINYPRINTF_DEFINE_TFP_SPRINTF
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CFLAGS ?= -march=$(ARCH) -mabi=ilp32 -static -mcmodel=medany -Wall -g -O3\
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-fvisibility=hidden -nostdlib -nostartfiles -ffreestanding $(TINY_PRINTF_FLAGS) $(PROGRAM_CFLAGS)
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OBJS := ${C_SRCS:.c=.o} ${ASM_SRCS:.S=.o} ${CRT:.S=.o}
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DEPS = $(OBJS:%.o=%.d)
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ifdef PROGRAM
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OUTFILES := $(PROGRAM).elf
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else
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OUTFILES := $(OBJS)
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endif
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all: $(OUTFILES)
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ifdef PROGRAM
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$(PROGRAM).elf: $(OBJS) $(LINKER_SCRIPT)
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$(CC) $(CFLAGS) -T $(LINKER_SCRIPT) $(OBJS) -o $@ $(LIBS)
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$(OBJDUMP) -dh $@ >$@.headers
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.PHONY: disassemble
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disassemble: $(PROGRAM).dis
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endif
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%.dis: %.elf
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$(OBJDUMP) -fhSD $^ > $@
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# Note: this target requires the srecord package to be installed.
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# XXX: This could be replaced by objcopy once
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# https://sourceware.org/bugzilla/show_bug.cgi?id=19921
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# is widely available.
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%.vmem: %.bin
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srec_cat $^ -binary -offset 0x0000 -byte-swap 4 -o $@ -vmem
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%.bin: %.elf
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$(OBJCOPY) -O binary $^ $@
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%.o: %.c
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$(CC) $(CFLAGS) -MMD -c $(INCS) -o $@ $<
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# Rule to compile C to assembly
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%.s: %.c
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$(CC) $(CFLAGS) -S $(INCS) $< -o $@
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%.o: %.S
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$(CC) $(CFLAGS) -MMD -c $(INCS) -o $@ $<
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clean:
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$(RM) -f $(OBJS) $(DEPS)
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rm -f *.bin *.vmem *.elf *.headers
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distclean: clean
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$(RM) -f $(OUTFILES)
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105
isolde/sw/simple_system/bsp/crt0.S
Normal file
105
isolde/sw/simple_system/bsp/crt0.S
Normal file
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@ -0,0 +1,105 @@
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# Copyright lowRISC contributors.
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# Licensed under the Apache License, Version 2.0, see LICENSE for details.
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# SPDX-License-Identifier: Apache-2.0
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#include "simple_system_regs.h"
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.section .text
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default_exc_handler:
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jal x0, simple_exc_handler
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timer_handler:
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jal x0, simple_timer_handler
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reset_handler:
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/* set all registers to zero */
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mv x1, x0
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mv x2, x1
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mv x3, x1
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mv x4, x1
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mv x5, x1
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mv x6, x1
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mv x7, x1
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mv x8, x1
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mv x9, x1
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mv x10, x1
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mv x11, x1
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mv x12, x1
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mv x13, x1
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mv x14, x1
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mv x15, x1
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mv x16, x1
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mv x17, x1
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mv x18, x1
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mv x19, x1
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mv x20, x1
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mv x21, x1
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mv x22, x1
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mv x23, x1
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mv x24, x1
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mv x25, x1
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mv x26, x1
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mv x27, x1
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mv x28, x1
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mv x29, x1
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mv x30, x1
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mv x31, x1
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/* stack initilization */
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la x2, _stack_start
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_start:
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.global _start
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/* clear BSS */
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la x26, _bss_start
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la x27, _bss_end
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bge x26, x27, zero_loop_end
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zero_loop:
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sw x0, 0(x26)
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addi x26, x26, 4
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ble x26, x27, zero_loop
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zero_loop_end:
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main_entry:
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/* jump to startup program entry */
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// addi x10, x0, 0
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// addi x11, x0, 0
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jal x1, startup
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/* Halt simulation */
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li a1, 0
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li a2, 0
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li a3, 0
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li a4, 0
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li a5, 0
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li a7, 93
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ecall
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/* If execution ends up here just put the core to sleep */
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sleep_loop:
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wfi
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j sleep_loop
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/* =================================================== [ exceptions ] === */
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/* This section has to be down here, since we have to disable rvc for it */
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.section .vectors, "ax"
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.option norvc;
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// All unimplemented interrupts/exceptions go to the default_exc_handler.
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.org 0x00
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.rept 7
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jal x0, default_exc_handler
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.endr
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jal x0, timer_handler
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.rept 23
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jal x0, default_exc_handler
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.endr
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// reset vector
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.org 0x80
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jal x0, reset_handler
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90
isolde/sw/simple_system/bsp/link.ld
Normal file
90
isolde/sw/simple_system/bsp/link.ld
Normal file
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@ -0,0 +1,90 @@
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/* Copyright lowRISC contributors.
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Licensed under the Apache License, Version 2.0, see LICENSE for details.
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SPDX-License-Identifier: Apache-2.0 */
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OUTPUT_ARCH(riscv)
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MEMORY
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{
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/* Change this if you'd like different sizes. Arty A7-100(35) has a maximum of 607.5KB(225KB)
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BRAM space. Configuration below is for maximum BRAM capacity with Artya A7-35 while letting
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CoreMark run (.vmem of 152.8KB).
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*/
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ram : ORIGIN = 0x00100000, LENGTH = 0x30000 /* 192 kB */
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stack : ORIGIN = 0x00130000, LENGTH = 0x8000 /* 32 kB */
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}
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/* Stack information variables */
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_min_stack = 0x2000; /* 8K - minimum stack space to reserve */
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_stack_len = LENGTH(stack);
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_stack_start = ORIGIN(stack) + LENGTH(stack);
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_entry_point = _vectors_start + 0x80;
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ENTRY(_entry_point)
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/* The tohost address is used by Spike for a magic "stop me now" message. This
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is set to equal SIM_CTRL_CTRL (see simple_system_regs.h), which has that
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effect in simple_system simulations. Note that it must be 8-byte aligned.
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We don't read data back from Spike, so fromhost is set to some dummy value:
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we place it just above the top of the stack.
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*/
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tohost = 0x20008;
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fromhost = _stack_start + 0x10;
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SECTIONS
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{
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.vectors :
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{
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. = ALIGN(4);
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_vectors_start = .;
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KEEP(*(.vectors))
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_vectors_end = .;
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} > ram
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.text : {
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. = ALIGN(4);
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*(.text)
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*(.text.*)
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} > ram
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.rodata : {
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. = ALIGN(4);
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/* Small RO data before large RO data */
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*(.srodata)
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*(.srodata.*)
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*(.rodata);
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*(.rodata.*)
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} > ram
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.data : {
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. = ALIGN(4);
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/* Small data before large data */
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*(.sdata)
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*(.sdata.*)
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*(.data);
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*(.data.*)
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} > ram
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|
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.bss :
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{
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. = ALIGN(4);
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_bss_start = .;
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/* Small BSS before large BSS */
|
||||
*(.sbss)
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*(.sbss.*)
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*(.bss)
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*(.bss.*)
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*(COMMON)
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_bss_end = .;
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} > ram
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|
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/* ensure there is enough room for stack */
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.stack (NOLOAD): {
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. = ALIGN(4);
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. = . + _min_stack ;
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. = ALIGN(4);
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stack = . ;
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_stack = . ;
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} > stack
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}
|
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191
isolde/sw/simple_system/bsp/simple_system_common.c
Normal file
191
isolde/sw/simple_system/bsp/simple_system_common.c
Normal file
|
|
@ -0,0 +1,191 @@
|
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// Copyright lowRISC contributors.
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// Licensed under the Apache License, Version 2.0, see LICENSE for details.
|
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// SPDX-License-Identifier: Apache-2.0
|
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|
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#include "simple_system_common.h"
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#include "tinyprintf.h"
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|
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|
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void puthex(uint32_t h) {
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int cur_digit;
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// Iterate through h taking top 4 bits each time and outputting ASCII of hex
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// digit for those 4 bits
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for (int i = 0; i < 8; i++) {
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cur_digit = h >> 28;
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|
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if (cur_digit < 10)
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putchar('0' + cur_digit);
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else
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putchar('A' - 10 + cur_digit);
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|
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h <<= 4;
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}
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}
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|
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#define MMADDR_EXIT SIM_CTRL_BASE + SIM_CTRL_CTRL
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void sim_halt() { DEV_WRITE(MMADDR_EXIT, 1); }
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void pcount_reset() {
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asm volatile(
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"csrw minstret, x0\n"
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"csrw mcycle, x0\n"
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"csrw mhpmcounter3, x0\n"
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"csrw mhpmcounter4, x0\n"
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"csrw mhpmcounter5, x0\n"
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"csrw mhpmcounter6, x0\n"
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"csrw mhpmcounter7, x0\n"
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"csrw mhpmcounter8, x0\n"
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||||
"csrw mhpmcounter9, x0\n"
|
||||
"csrw mhpmcounter10, x0\n"
|
||||
"csrw mhpmcounter11, x0\n"
|
||||
"csrw mhpmcounter12, x0\n"
|
||||
"csrw mhpmcounter13, x0\n"
|
||||
"csrw mhpmcounter14, x0\n"
|
||||
"csrw mhpmcounter15, x0\n"
|
||||
"csrw mhpmcounter16, x0\n"
|
||||
"csrw mhpmcounter17, x0\n"
|
||||
"csrw mhpmcounter18, x0\n"
|
||||
"csrw mhpmcounter19, x0\n"
|
||||
"csrw mhpmcounter20, x0\n"
|
||||
"csrw mhpmcounter21, x0\n"
|
||||
"csrw mhpmcounter22, x0\n"
|
||||
"csrw mhpmcounter23, x0\n"
|
||||
"csrw mhpmcounter24, x0\n"
|
||||
"csrw mhpmcounter25, x0\n"
|
||||
"csrw mhpmcounter26, x0\n"
|
||||
"csrw mhpmcounter27, x0\n"
|
||||
"csrw mhpmcounter28, x0\n"
|
||||
"csrw mhpmcounter29, x0\n"
|
||||
"csrw mhpmcounter30, x0\n"
|
||||
"csrw mhpmcounter31, x0\n"
|
||||
"csrw minstreth, x0\n"
|
||||
"csrw mcycleh, x0\n"
|
||||
"csrw mhpmcounter3h, x0\n"
|
||||
"csrw mhpmcounter4h, x0\n"
|
||||
"csrw mhpmcounter5h, x0\n"
|
||||
"csrw mhpmcounter6h, x0\n"
|
||||
"csrw mhpmcounter7h, x0\n"
|
||||
"csrw mhpmcounter8h, x0\n"
|
||||
"csrw mhpmcounter9h, x0\n"
|
||||
"csrw mhpmcounter10h, x0\n"
|
||||
"csrw mhpmcounter11h, x0\n"
|
||||
"csrw mhpmcounter12h, x0\n"
|
||||
"csrw mhpmcounter13h, x0\n"
|
||||
"csrw mhpmcounter14h, x0\n"
|
||||
"csrw mhpmcounter15h, x0\n"
|
||||
"csrw mhpmcounter16h, x0\n"
|
||||
"csrw mhpmcounter17h, x0\n"
|
||||
"csrw mhpmcounter18h, x0\n"
|
||||
"csrw mhpmcounter19h, x0\n"
|
||||
"csrw mhpmcounter20h, x0\n"
|
||||
"csrw mhpmcounter21h, x0\n"
|
||||
"csrw mhpmcounter22h, x0\n"
|
||||
"csrw mhpmcounter23h, x0\n"
|
||||
"csrw mhpmcounter24h, x0\n"
|
||||
"csrw mhpmcounter25h, x0\n"
|
||||
"csrw mhpmcounter26h, x0\n"
|
||||
"csrw mhpmcounter27h, x0\n"
|
||||
"csrw mhpmcounter28h, x0\n"
|
||||
"csrw mhpmcounter29h, x0\n"
|
||||
"csrw mhpmcounter30h, x0\n"
|
||||
"csrw mhpmcounter31h, x0\n");
|
||||
}
|
||||
|
||||
unsigned int get_mepc() {
|
||||
uint32_t result;
|
||||
__asm__ volatile("csrr %0, mepc;" : "=r"(result));
|
||||
return result;
|
||||
}
|
||||
|
||||
unsigned int get_mcause() {
|
||||
uint32_t result;
|
||||
__asm__ volatile("csrr %0, mcause;" : "=r"(result));
|
||||
return result;
|
||||
}
|
||||
|
||||
unsigned int get_mtval() {
|
||||
uint32_t result;
|
||||
__asm__ volatile("csrr %0, mtval;" : "=r"(result));
|
||||
return result;
|
||||
}
|
||||
|
||||
void simple_exc_handler(void) {
|
||||
#if 0
|
||||
volatile register int a7 asm("a7");
|
||||
|
||||
// Check if A7 equals 93
|
||||
//https://jborza.com/post/2021-05-11-riscv-linux-syscalls/
|
||||
if (a7 == 93) {
|
||||
#else
|
||||
int result;
|
||||
asm volatile ("mv %0, a7" : "=r"(result));
|
||||
// Check if A7 equals 93
|
||||
//https://jborza.com/post/2021-05-11-riscv-linux-syscalls/
|
||||
if (result == 93) {
|
||||
#endif
|
||||
printf("exit()\n");
|
||||
printf("======\n");
|
||||
}else{
|
||||
printf("EXCEPTION!!!\n");
|
||||
printf("============\n");
|
||||
printf("MEPC: 0x");
|
||||
puthex(get_mepc());
|
||||
printf("\nMCAUSE: 0x");
|
||||
puthex(get_mcause());
|
||||
printf("\nMTVAL: 0x");
|
||||
puthex(get_mtval());
|
||||
putchar('\n');
|
||||
}
|
||||
sim_halt();
|
||||
|
||||
while(1);
|
||||
}
|
||||
|
||||
volatile uint64_t time_elapsed;
|
||||
uint64_t time_increment;
|
||||
|
||||
inline static void increment_timecmp(uint64_t time_base) {
|
||||
uint64_t current_time = timer_read();
|
||||
current_time += time_base;
|
||||
timecmp_update(current_time);
|
||||
}
|
||||
|
||||
void timer_enable(uint64_t time_base) {
|
||||
time_elapsed = 0;
|
||||
time_increment = time_base;
|
||||
// Set timer values
|
||||
increment_timecmp(time_base);
|
||||
// enable timer interrupt
|
||||
asm volatile("csrs mie, %0\n" : : "r"(0x80));
|
||||
// enable global interrupt
|
||||
asm volatile("csrs mstatus, %0\n" : : "r"(0x8));
|
||||
}
|
||||
|
||||
void timer_disable(void) { asm volatile("csrc mie, %0\n" : : "r"(0x80)); }
|
||||
|
||||
uint64_t timer_read(void) {
|
||||
uint32_t current_timeh;
|
||||
uint32_t current_time;
|
||||
// check if time overflowed while reading and try again
|
||||
do {
|
||||
current_timeh = DEV_READ(TIMER_BASE + TIMER_MTIMEH, 0);
|
||||
current_time = DEV_READ(TIMER_BASE + TIMER_MTIME, 0);
|
||||
} while (current_timeh != DEV_READ(TIMER_BASE + TIMER_MTIMEH, 0));
|
||||
uint64_t final_time = ((uint64_t)current_timeh << 32) | current_time;
|
||||
return final_time;
|
||||
}
|
||||
|
||||
void timecmp_update(uint64_t new_time) {
|
||||
DEV_WRITE(TIMER_BASE + TIMER_MTIMECMP, -1);
|
||||
DEV_WRITE(TIMER_BASE + TIMER_MTIMECMPH, new_time >> 32);
|
||||
DEV_WRITE(TIMER_BASE + TIMER_MTIMECMP, new_time);
|
||||
}
|
||||
|
||||
uint64_t get_elapsed_time(void) { return time_elapsed; }
|
||||
|
||||
void simple_timer_handler(void) __attribute__((interrupt));
|
||||
|
||||
void simple_timer_handler(void) {
|
||||
increment_timecmp(time_increment);
|
||||
time_elapsed++;
|
||||
}
|
||||
116
isolde/sw/simple_system/bsp/simple_system_common.h
Normal file
116
isolde/sw/simple_system/bsp/simple_system_common.h
Normal file
|
|
@ -0,0 +1,116 @@
|
|||
// Copyright lowRISC contributors.
|
||||
// Licensed under the Apache License, Version 2.0, see LICENSE for details.
|
||||
// SPDX-License-Identifier: Apache-2.0
|
||||
|
||||
#ifndef SIMPLE_SYSTEM_COMMON_H__
|
||||
|
||||
#include <stdint.h>
|
||||
|
||||
#include "simple_system_regs.h"
|
||||
|
||||
#define DEV_WRITE(addr, val) (*((volatile uint32_t *)(addr)) = val)
|
||||
#define DEV_READ(addr, val) (*((volatile uint32_t *)(addr)))
|
||||
#define PCOUNT_READ(name, dst) asm volatile("csrr %0, " #name ";" : "=r"(dst))
|
||||
|
||||
extern void _putcf (void * unused, char c);
|
||||
/**
|
||||
* Writes character to simulator out log. Signature matches c stdlib function
|
||||
* of the same name.
|
||||
*
|
||||
* @param c Character to output
|
||||
* @returns Character output (never fails so no EOF ever returned)
|
||||
*/
|
||||
int putchar(char c);
|
||||
|
||||
/**
|
||||
* Writes string to simulator out log. Signature matches c stdlib function of
|
||||
* the same name.
|
||||
*
|
||||
* @param str String to output
|
||||
* @returns 0 always (never fails so no error)
|
||||
*/
|
||||
int puts(const char *str);
|
||||
|
||||
/**
|
||||
* Writes ASCII hex representation of number to simulator out log.
|
||||
*
|
||||
* @param h Number to output in hex
|
||||
*/
|
||||
void puthex(uint32_t h);
|
||||
|
||||
/**
|
||||
* Immediately halts the simulation
|
||||
*/
|
||||
void sim_halt();
|
||||
|
||||
/**
|
||||
* Enables/disables performance counters. This effects mcycle and minstret as
|
||||
* well as the mhpmcounterN counters.
|
||||
*
|
||||
* @param enable if non-zero enables, otherwise disables
|
||||
*/
|
||||
static inline void pcount_enable(int enable) {
|
||||
// Note cycle is disabled with everything else
|
||||
unsigned int inhibit_val = enable ? 0x0 : 0xFFFFFFFF;
|
||||
// CSR 0x320 was called `mucounteren` in the privileged spec v1.9.1, it was
|
||||
// then dropped in v1.10, and then re-added in v1.11 with the name
|
||||
// `mcountinhibit`. Unfortunately, the version of binutils we use only allows
|
||||
// the old name, and LLVM only supports the new name (though this is changed
|
||||
// on trunk to support both), so we use the numeric value here for maximum
|
||||
// compatibility.
|
||||
asm volatile("csrw 0x320, %0\n" : : "r"(inhibit_val));
|
||||
}
|
||||
|
||||
/**
|
||||
* Resets all performance counters. This effects mcycle and minstret as well
|
||||
* as the mhpmcounterN counters.
|
||||
*/
|
||||
void pcount_reset();
|
||||
|
||||
/**
|
||||
* Enables timer interrupt
|
||||
*
|
||||
* @param time_base Number of time ticks to count before interrupt
|
||||
*/
|
||||
void timer_enable(uint64_t time_base);
|
||||
|
||||
/**
|
||||
* Returns current mtime value
|
||||
*/
|
||||
uint64_t timer_read(void);
|
||||
|
||||
/**
|
||||
* Set a new timer value
|
||||
*
|
||||
* @param new_time New value for time
|
||||
*/
|
||||
void timecmp_update(uint64_t new_time);
|
||||
|
||||
/**
|
||||
* Disables timer interrupt
|
||||
*/
|
||||
void timer_disable(void);
|
||||
|
||||
/**
|
||||
* Returns current global time value
|
||||
*/
|
||||
uint64_t get_elapsed_time(void);
|
||||
|
||||
/**
|
||||
* Enables/disables the instruction cache. This has no effect on Ibex
|
||||
* configurations that do not have an instruction cache and in particular is
|
||||
* safe to execute on those configurations.
|
||||
*
|
||||
* @param enable if non-zero enables, otherwise disables
|
||||
*/
|
||||
static inline void icache_enable(int enable) {
|
||||
if (enable) {
|
||||
// Set icache enable bit in CPUCTRLSTS
|
||||
asm volatile("csrs 0x7c0, 1");
|
||||
} else {
|
||||
// Clear icache enable bit in CPUCTRLSTS
|
||||
asm volatile("csrc 0x7c0, 1");
|
||||
}
|
||||
}
|
||||
|
||||
#endif
|
||||
18
isolde/sw/simple_system/bsp/simple_system_regs.h
Normal file
18
isolde/sw/simple_system/bsp/simple_system_regs.h
Normal file
|
|
@ -0,0 +1,18 @@
|
|||
// Copyright lowRISC contributors.
|
||||
// Licensed under the Apache License, Version 2.0, see LICENSE for details.
|
||||
// SPDX-License-Identifier: Apache-2.0
|
||||
|
||||
#ifndef SIMPLE_SYSTEM_REGS_H__
|
||||
#define SIMPLE_SYSTEM_REGS_H__
|
||||
|
||||
#define SIM_CTRL_BASE 0x20000
|
||||
#define SIM_CTRL_OUT 0x0
|
||||
#define SIM_CTRL_CTRL 0x8
|
||||
|
||||
#define TIMER_BASE 0x30000
|
||||
#define TIMER_MTIME 0x0
|
||||
#define TIMER_MTIMEH 0x4
|
||||
#define TIMER_MTIMECMP 0x8
|
||||
#define TIMER_MTIMECMPH 0xC
|
||||
|
||||
#endif // SIMPLE_SYSTEM_REGS_H__
|
||||
28
isolde/sw/simple_system/bsp/startup.c
Normal file
28
isolde/sw/simple_system/bsp/startup.c
Normal file
|
|
@ -0,0 +1,28 @@
|
|||
|
||||
#define TINYPRINTF_DEFINE_TFP_PRINTF 1
|
||||
#define TINYPRINTF_DEFINE_TFP_SPRINTF 1
|
||||
#include "tinyprintf.h"
|
||||
|
||||
#include "simple_system_common.h"
|
||||
|
||||
|
||||
extern int main(int argc, char *argv[]);
|
||||
|
||||
|
||||
|
||||
void _putcf (void * unused, char c) {
|
||||
(int)unused;
|
||||
DEV_WRITE(SIM_CTRL_BASE + SIM_CTRL_OUT, (unsigned char)c);
|
||||
}
|
||||
|
||||
int putchar(char c){
|
||||
_putcf (0, c);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
|
||||
void startup(){
|
||||
init_printf(0, _putcf);
|
||||
main(0, 0);
|
||||
}
|
||||
521
isolde/sw/simple_system/bsp/tinyprintf.c
Normal file
521
isolde/sw/simple_system/bsp/tinyprintf.c
Normal file
|
|
@ -0,0 +1,521 @@
|
|||
/*
|
||||
File: tinyprintf.c
|
||||
|
||||
Copyright (C) 2004 Kustaa Nyholm
|
||||
|
||||
This library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Lesser General Public
|
||||
License as published by the Free Software Foundation; either
|
||||
version 2.1 of the License, or (at your option) any later version.
|
||||
|
||||
This library is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public
|
||||
License along with this library; if not, write to the Free Software
|
||||
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
|
||||
*/
|
||||
|
||||
#include "tinyprintf.h"
|
||||
|
||||
|
||||
/*
|
||||
* Configuration
|
||||
*/
|
||||
|
||||
/* Enable long int support */
|
||||
#define PRINTF_LONG_SUPPORT
|
||||
|
||||
/* Enable long long int support (implies long int support) */
|
||||
//#define PRINTF_LONG_LONG_SUPPORT
|
||||
|
||||
/* Enable %z (size_t) support */
|
||||
#define PRINTF_SIZE_T_SUPPORT
|
||||
|
||||
/*
|
||||
* Configuration adjustments
|
||||
*/
|
||||
#ifdef PRINTF_SIZE_T_SUPPORT
|
||||
#include <sys/types.h>
|
||||
#endif
|
||||
|
||||
#ifdef PRINTF_LONG_LONG_SUPPORT
|
||||
# define PRINTF_LONG_SUPPORT
|
||||
#endif
|
||||
|
||||
/* __SIZEOF_<type>__ defined at least by gcc */
|
||||
#ifdef __SIZEOF_POINTER__
|
||||
# define SIZEOF_POINTER __SIZEOF_POINTER__
|
||||
#endif
|
||||
#ifdef __SIZEOF_LONG_LONG__
|
||||
# define SIZEOF_LONG_LONG __SIZEOF_LONG_LONG__
|
||||
#endif
|
||||
#ifdef __SIZEOF_LONG__
|
||||
# define SIZEOF_LONG __SIZEOF_LONG__
|
||||
#endif
|
||||
#ifdef __SIZEOF_INT__
|
||||
# define SIZEOF_INT __SIZEOF_INT__
|
||||
#endif
|
||||
|
||||
#ifdef __GNUC__
|
||||
# define _TFP_GCC_NO_INLINE_ __attribute__ ((noinline))
|
||||
#else
|
||||
# define _TFP_GCC_NO_INLINE_
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Implementation
|
||||
*/
|
||||
struct param {
|
||||
char lz:1; /**< Leading zeros */
|
||||
char alt:1; /**< alternate form */
|
||||
char uc:1; /**< Upper case (for base16 only) */
|
||||
char align_left:1; /**< 0 == align right (default), 1 == align left */
|
||||
unsigned int width; /**< field width */
|
||||
char sign; /**< The sign to display (if any) */
|
||||
unsigned int base; /**< number base (e.g.: 8, 10, 16) */
|
||||
char *bf; /**< Buffer to output */
|
||||
};
|
||||
|
||||
|
||||
#ifdef PRINTF_LONG_LONG_SUPPORT
|
||||
static void _TFP_GCC_NO_INLINE_ ulli2a(
|
||||
unsigned long long int num, struct param *p)
|
||||
{
|
||||
int n = 0;
|
||||
unsigned long long int d = 1;
|
||||
char *bf = p->bf;
|
||||
while (num / d >= p->base)
|
||||
d *= p->base;
|
||||
while (d != 0) {
|
||||
int dgt = num / d;
|
||||
num %= d;
|
||||
d /= p->base;
|
||||
if (n || dgt > 0 || d == 0) {
|
||||
*bf++ = dgt + (dgt < 10 ? '0' : (p->uc ? 'A' : 'a') - 10);
|
||||
++n;
|
||||
}
|
||||
}
|
||||
*bf = 0;
|
||||
}
|
||||
|
||||
static void lli2a(long long int num, struct param *p)
|
||||
{
|
||||
if (num < 0) {
|
||||
num = -num;
|
||||
p->sign = '-';
|
||||
}
|
||||
ulli2a(num, p);
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef PRINTF_LONG_SUPPORT
|
||||
static void uli2a(unsigned long int num, struct param *p)
|
||||
{
|
||||
int n = 0;
|
||||
unsigned long int d = 1;
|
||||
char *bf = p->bf;
|
||||
while (num / d >= p->base)
|
||||
d *= p->base;
|
||||
while (d != 0) {
|
||||
int dgt = num / d;
|
||||
num %= d;
|
||||
d /= p->base;
|
||||
if (n || dgt > 0 || d == 0) {
|
||||
*bf++ = dgt + (dgt < 10 ? '0' : (p->uc ? 'A' : 'a') - 10);
|
||||
++n;
|
||||
}
|
||||
}
|
||||
*bf = 0;
|
||||
}
|
||||
|
||||
static void li2a(long num, struct param *p)
|
||||
{
|
||||
if (num < 0) {
|
||||
num = -num;
|
||||
p->sign = '-';
|
||||
}
|
||||
uli2a(num, p);
|
||||
}
|
||||
#endif
|
||||
|
||||
static void ui2a(unsigned int num, struct param *p)
|
||||
{
|
||||
int n = 0;
|
||||
unsigned int d = 1;
|
||||
char *bf = p->bf;
|
||||
while (num / d >= p->base)
|
||||
d *= p->base;
|
||||
while (d != 0) {
|
||||
int dgt = num / d;
|
||||
num %= d;
|
||||
d /= p->base;
|
||||
if (n || dgt > 0 || d == 0) {
|
||||
*bf++ = dgt + (dgt < 10 ? '0' : (p->uc ? 'A' : 'a') - 10);
|
||||
++n;
|
||||
}
|
||||
}
|
||||
*bf = 0;
|
||||
}
|
||||
|
||||
static void i2a(int num, struct param *p)
|
||||
{
|
||||
if (num < 0) {
|
||||
num = -num;
|
||||
p->sign = '-';
|
||||
}
|
||||
ui2a(num, p);
|
||||
}
|
||||
|
||||
static int a2d(char ch)
|
||||
{
|
||||
if (ch >= '0' && ch <= '9')
|
||||
return ch - '0';
|
||||
else if (ch >= 'a' && ch <= 'f')
|
||||
return ch - 'a' + 10;
|
||||
else if (ch >= 'A' && ch <= 'F')
|
||||
return ch - 'A' + 10;
|
||||
else
|
||||
return -1;
|
||||
}
|
||||
|
||||
static char a2u(char ch, const char **src, int base, unsigned int *nump)
|
||||
{
|
||||
const char *p = *src;
|
||||
unsigned int num = 0;
|
||||
int digit;
|
||||
while ((digit = a2d(ch)) >= 0) {
|
||||
if (digit > base)
|
||||
break;
|
||||
num = num * base + digit;
|
||||
ch = *p++;
|
||||
}
|
||||
*src = p;
|
||||
*nump = num;
|
||||
return ch;
|
||||
}
|
||||
|
||||
static void putchw(void *putp, putcf putf, struct param *p)
|
||||
{
|
||||
char ch;
|
||||
int n = p->width;
|
||||
char *bf = p->bf;
|
||||
|
||||
/* Number of filling characters */
|
||||
while (*bf++ && n > 0)
|
||||
n--;
|
||||
if (p->sign)
|
||||
n--;
|
||||
if (p->alt && p->base == 16)
|
||||
n -= 2;
|
||||
else if (p->alt && p->base == 8)
|
||||
n--;
|
||||
|
||||
/* Fill with space to align to the right, before alternate or sign */
|
||||
if (!p->lz && !p->align_left) {
|
||||
while (n-- > 0)
|
||||
putf(putp, ' ');
|
||||
}
|
||||
|
||||
/* print sign */
|
||||
if (p->sign)
|
||||
putf(putp, p->sign);
|
||||
|
||||
/* Alternate */
|
||||
if (p->alt && p->base == 16) {
|
||||
putf(putp, '0');
|
||||
putf(putp, (p->uc ? 'X' : 'x'));
|
||||
} else if (p->alt && p->base == 8) {
|
||||
putf(putp, '0');
|
||||
}
|
||||
|
||||
/* Fill with zeros, after alternate or sign */
|
||||
if (p->lz) {
|
||||
while (n-- > 0)
|
||||
putf(putp, '0');
|
||||
}
|
||||
|
||||
/* Put actual buffer */
|
||||
bf = p->bf;
|
||||
while ((ch = *bf++))
|
||||
putf(putp, ch);
|
||||
|
||||
/* Fill with space to align to the left, after string */
|
||||
if (!p->lz && p->align_left) {
|
||||
while (n-- > 0)
|
||||
putf(putp, ' ');
|
||||
}
|
||||
}
|
||||
|
||||
void tfp_format(void *putp, putcf putf, const char *fmt, va_list va)
|
||||
{
|
||||
struct param p;
|
||||
#ifdef PRINTF_LONG_SUPPORT
|
||||
char bf[23]; /* long = 64b on some architectures */
|
||||
#else
|
||||
char bf[12]; /* int = 32b on some architectures */
|
||||
#endif
|
||||
char ch;
|
||||
p.bf = bf;
|
||||
|
||||
while ((ch = *(fmt++))) {
|
||||
if (ch != '%') {
|
||||
putf(putp, ch);
|
||||
} else {
|
||||
#ifdef PRINTF_LONG_SUPPORT
|
||||
char lng = 0; /* 1 for long, 2 for long long */
|
||||
#endif
|
||||
/* Init parameter struct */
|
||||
p.lz = 0;
|
||||
p.alt = 0;
|
||||
p.width = 0;
|
||||
p.align_left = 0;
|
||||
p.sign = 0;
|
||||
|
||||
/* Flags */
|
||||
while ((ch = *(fmt++))) {
|
||||
switch (ch) {
|
||||
case '-':
|
||||
p.align_left = 1;
|
||||
continue;
|
||||
case '0':
|
||||
p.lz = 1;
|
||||
continue;
|
||||
case '#':
|
||||
p.alt = 1;
|
||||
continue;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
/* Width */
|
||||
if (ch >= '0' && ch <= '9') {
|
||||
ch = a2u(ch, &fmt, 10, &(p.width));
|
||||
}
|
||||
|
||||
/* We accept 'x.y' format but don't support it completely:
|
||||
* we ignore the 'y' digit => this ignores 0-fill
|
||||
* size and makes it == width (ie. 'x') */
|
||||
if (ch == '.') {
|
||||
p.lz = 1; /* zero-padding */
|
||||
/* ignore actual 0-fill size: */
|
||||
do {
|
||||
ch = *(fmt++);
|
||||
} while ((ch >= '0') && (ch <= '9'));
|
||||
}
|
||||
|
||||
#ifdef PRINTF_SIZE_T_SUPPORT
|
||||
# ifdef PRINTF_LONG_SUPPORT
|
||||
if (ch == 'z') {
|
||||
ch = *(fmt++);
|
||||
if (sizeof(size_t) == sizeof(unsigned long int))
|
||||
lng = 1;
|
||||
# ifdef PRINTF_LONG_LONG_SUPPORT
|
||||
else if (sizeof(size_t) == sizeof(unsigned long long int))
|
||||
lng = 2;
|
||||
# endif
|
||||
} else
|
||||
# endif
|
||||
#endif
|
||||
|
||||
#ifdef PRINTF_LONG_SUPPORT
|
||||
if (ch == 'l') {
|
||||
ch = *(fmt++);
|
||||
lng = 1;
|
||||
#ifdef PRINTF_LONG_LONG_SUPPORT
|
||||
if (ch == 'l') {
|
||||
ch = *(fmt++);
|
||||
lng = 2;
|
||||
}
|
||||
#endif
|
||||
}
|
||||
#endif
|
||||
switch (ch) {
|
||||
case 0:
|
||||
goto abort;
|
||||
case 'u':
|
||||
p.base = 10;
|
||||
#ifdef PRINTF_LONG_SUPPORT
|
||||
#ifdef PRINTF_LONG_LONG_SUPPORT
|
||||
if (2 == lng)
|
||||
ulli2a(va_arg(va, unsigned long long int), &p);
|
||||
else
|
||||
#endif
|
||||
if (1 == lng)
|
||||
uli2a(va_arg(va, unsigned long int), &p);
|
||||
else
|
||||
#endif
|
||||
ui2a(va_arg(va, unsigned int), &p);
|
||||
putchw(putp, putf, &p);
|
||||
break;
|
||||
case 'd':
|
||||
case 'i':
|
||||
p.base = 10;
|
||||
#ifdef PRINTF_LONG_SUPPORT
|
||||
#ifdef PRINTF_LONG_LONG_SUPPORT
|
||||
if (2 == lng)
|
||||
lli2a(va_arg(va, long long int), &p);
|
||||
else
|
||||
#endif
|
||||
if (1 == lng)
|
||||
li2a(va_arg(va, long int), &p);
|
||||
else
|
||||
#endif
|
||||
i2a(va_arg(va, int), &p);
|
||||
putchw(putp, putf, &p);
|
||||
break;
|
||||
#ifdef SIZEOF_POINTER
|
||||
case 'p':
|
||||
p.alt = 1;
|
||||
# if defined(SIZEOF_INT) && SIZEOF_POINTER <= SIZEOF_INT
|
||||
lng = 0;
|
||||
# elif defined(SIZEOF_LONG) && SIZEOF_POINTER <= SIZEOF_LONG
|
||||
lng = 1;
|
||||
# elif defined(SIZEOF_LONG_LONG) && SIZEOF_POINTER <= SIZEOF_LONG_LONG
|
||||
lng = 2;
|
||||
# endif
|
||||
#endif
|
||||
case 'x':
|
||||
case 'X':
|
||||
p.base = 16;
|
||||
p.uc = (ch == 'X')?1:0;
|
||||
#ifdef PRINTF_LONG_SUPPORT
|
||||
#ifdef PRINTF_LONG_LONG_SUPPORT
|
||||
if (2 == lng)
|
||||
ulli2a(va_arg(va, unsigned long long int), &p);
|
||||
else
|
||||
#endif
|
||||
if (1 == lng)
|
||||
uli2a(va_arg(va, unsigned long int), &p);
|
||||
else
|
||||
#endif
|
||||
ui2a(va_arg(va, unsigned int), &p);
|
||||
putchw(putp, putf, &p);
|
||||
break;
|
||||
case 'o':
|
||||
p.base = 8;
|
||||
ui2a(va_arg(va, unsigned int), &p);
|
||||
putchw(putp, putf, &p);
|
||||
break;
|
||||
case 'c':
|
||||
putf(putp, (char)(va_arg(va, int)));
|
||||
break;
|
||||
case 's':
|
||||
p.bf = va_arg(va, char *);
|
||||
putchw(putp, putf, &p);
|
||||
p.bf = bf;
|
||||
break;
|
||||
case '%':
|
||||
putf(putp, ch);
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
abort:;
|
||||
}
|
||||
|
||||
#if TINYPRINTF_DEFINE_TFP_PRINTF
|
||||
static putcf stdout_putf;
|
||||
static void *stdout_putp;
|
||||
|
||||
void init_printf(void *putp, putcf putf)
|
||||
{
|
||||
stdout_putf = putf;
|
||||
stdout_putp = putp;
|
||||
}
|
||||
|
||||
void tfp_printf(char *fmt, ...)
|
||||
{
|
||||
va_list va;
|
||||
va_start(va, fmt);
|
||||
tfp_format(stdout_putp, stdout_putf, fmt, va);
|
||||
va_end(va);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if TINYPRINTF_DEFINE_TFP_SPRINTF
|
||||
struct _vsnprintf_putcf_data
|
||||
{
|
||||
size_t dest_capacity;
|
||||
char *dest;
|
||||
size_t num_chars;
|
||||
};
|
||||
|
||||
static void _vsnprintf_putcf(void *p, char c)
|
||||
{
|
||||
struct _vsnprintf_putcf_data *data = (struct _vsnprintf_putcf_data*)p;
|
||||
if (data->num_chars < data->dest_capacity)
|
||||
data->dest[data->num_chars] = c;
|
||||
data->num_chars ++;
|
||||
}
|
||||
|
||||
int tfp_vsnprintf(char *str, size_t size, const char *format, va_list ap)
|
||||
{
|
||||
struct _vsnprintf_putcf_data data;
|
||||
|
||||
if (size < 1)
|
||||
return 0;
|
||||
|
||||
data.dest = str;
|
||||
data.dest_capacity = size-1;
|
||||
data.num_chars = 0;
|
||||
tfp_format(&data, _vsnprintf_putcf, format, ap);
|
||||
|
||||
if (data.num_chars < data.dest_capacity)
|
||||
data.dest[data.num_chars] = '\0';
|
||||
else
|
||||
data.dest[data.dest_capacity] = '\0';
|
||||
|
||||
return data.num_chars;
|
||||
}
|
||||
|
||||
int tfp_snprintf(char *str, size_t size, const char *format, ...)
|
||||
{
|
||||
va_list ap;
|
||||
int retval;
|
||||
|
||||
va_start(ap, format);
|
||||
retval = tfp_vsnprintf(str, size, format, ap);
|
||||
va_end(ap);
|
||||
return retval;
|
||||
}
|
||||
|
||||
struct _vsprintf_putcf_data
|
||||
{
|
||||
char *dest;
|
||||
size_t num_chars;
|
||||
};
|
||||
|
||||
static void _vsprintf_putcf(void *p, char c)
|
||||
{
|
||||
struct _vsprintf_putcf_data *data = (struct _vsprintf_putcf_data*)p;
|
||||
data->dest[data->num_chars++] = c;
|
||||
}
|
||||
|
||||
int tfp_vsprintf(char *str, const char *format, va_list ap)
|
||||
{
|
||||
struct _vsprintf_putcf_data data;
|
||||
data.dest = str;
|
||||
data.num_chars = 0;
|
||||
tfp_format(&data, _vsprintf_putcf, format, ap);
|
||||
data.dest[data.num_chars] = '\0';
|
||||
return data.num_chars;
|
||||
}
|
||||
|
||||
int tfp_sprintf(char *str, const char *format, ...)
|
||||
{
|
||||
va_list ap;
|
||||
int retval;
|
||||
|
||||
va_start(ap, format);
|
||||
retval = tfp_vsprintf(str, format, ap);
|
||||
va_end(ap);
|
||||
return retval;
|
||||
}
|
||||
#endif
|
||||
186
isolde/sw/simple_system/bsp/tinyprintf.h
Normal file
186
isolde/sw/simple_system/bsp/tinyprintf.h
Normal file
|
|
@ -0,0 +1,186 @@
|
|||
/*
|
||||
File: tinyprintf.h
|
||||
|
||||
Copyright (C) 2004 Kustaa Nyholm
|
||||
|
||||
This library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Lesser General Public
|
||||
License as published by the Free Software Foundation; either
|
||||
version 2.1 of the License, or (at your option) any later version.
|
||||
|
||||
This library is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public
|
||||
License along with this library; if not, write to the Free Software
|
||||
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
|
||||
This library is really just two files: 'tinyprintf.h' and 'tinyprintf.c'.
|
||||
|
||||
They provide a simple and small (+400 loc) printf functionality to
|
||||
be used in embedded systems.
|
||||
|
||||
I've found them so useful in debugging that I do not bother with a
|
||||
debugger at all.
|
||||
|
||||
They are distributed in source form, so to use them, just compile them
|
||||
into your project.
|
||||
|
||||
Two printf variants are provided: printf and the 'sprintf' family of
|
||||
functions ('snprintf', 'sprintf', 'vsnprintf', 'vsprintf').
|
||||
|
||||
The formats supported by this implementation are:
|
||||
'c' 'd' 'i' 'o' 'p' 'u' 's' 'x' 'X'.
|
||||
|
||||
Zero padding and field width are also supported.
|
||||
|
||||
If the library is compiled with 'PRINTF_SUPPORT_LONG' defined, then
|
||||
the long specifier is also supported. Note that this will pull in some
|
||||
long math routines (pun intended!) and thus make your executable
|
||||
noticeably longer. Likewise with 'PRINTF_LONG_LONG_SUPPORT' for the
|
||||
long long specifier, and with 'PRINTF_SIZE_T_SUPPORT' for the size_t
|
||||
specifier.
|
||||
|
||||
The memory footprint of course depends on the target CPU, compiler and
|
||||
compiler options, but a rough guesstimate (based on a H8S target) is about
|
||||
1.4 kB for code and some twenty 'int's and 'char's, say 60 bytes of stack space.
|
||||
Not too bad. Your mileage may vary. By hacking the source code you can
|
||||
get rid of some hundred bytes, I'm sure, but personally I feel the balance of
|
||||
functionality and flexibility versus code size is close to optimal for
|
||||
many embedded systems.
|
||||
|
||||
To use the printf, you need to supply your own character output function,
|
||||
something like :
|
||||
|
||||
void putc ( void* p, char c)
|
||||
{
|
||||
while (!SERIAL_PORT_EMPTY) ;
|
||||
SERIAL_PORT_TX_REGISTER = c;
|
||||
}
|
||||
|
||||
Before you can call printf, you need to initialize it to use your
|
||||
character output function with something like:
|
||||
|
||||
init_printf(NULL,putc);
|
||||
|
||||
Notice the 'NULL' in 'init_printf' and the parameter 'void* p' in 'putc',
|
||||
the NULL (or any pointer) you pass into the 'init_printf' will eventually be
|
||||
passed to your 'putc' routine. This allows you to pass some storage space (or
|
||||
anything really) to the character output function, if necessary.
|
||||
This is not often needed but it was implemented like that because it made
|
||||
implementing the sprintf function so neat (look at the source code).
|
||||
|
||||
The code is re-entrant, except for the 'init_printf' function, so it is safe
|
||||
to call it from interrupts too, although this may result in mixed output.
|
||||
If you rely on re-entrancy, take care that your 'putc' function is re-entrant!
|
||||
|
||||
The printf and sprintf functions are actually macros that translate to
|
||||
'tfp_printf' and 'tfp_sprintf' when 'TINYPRINTF_OVERRIDE_LIBC' is set
|
||||
(default). Setting it to 0 makes it possible to use them along with
|
||||
'stdio.h' printf's in a single source file. When
|
||||
'TINYPRINTF_OVERRIDE_LIBC' is set, please note that printf/sprintf are
|
||||
not function-like macros, so if you have variables or struct members
|
||||
with these names, things will explode in your face. Without variadic
|
||||
macros this is the best we can do to wrap these function. If it is a
|
||||
problem, just give up the macros and use the functions directly, or
|
||||
rename them.
|
||||
|
||||
It is also possible to avoid defining tfp_printf and/or tfp_sprintf by
|
||||
clearing 'TINYPRINTF_DEFINE_TFP_PRINTF' and/or
|
||||
'TINYPRINTF_DEFINE_TFP_SPRINTF' to 0. This allows for example to
|
||||
export only tfp_format, which is at the core of all the other
|
||||
functions.
|
||||
|
||||
For further details see source code.
|
||||
|
||||
regs Kusti, 23.10.2004
|
||||
*/
|
||||
|
||||
#ifndef __TFP_PRINTF__
|
||||
#define __TFP_PRINTF__
|
||||
|
||||
#include <stdarg.h>
|
||||
|
||||
/* Global configuration */
|
||||
|
||||
/* Set this to 0 if you do not want to provide tfp_printf */
|
||||
#ifndef TINYPRINTF_DEFINE_TFP_PRINTF
|
||||
# define TINYPRINTF_DEFINE_TFP_PRINTF 1
|
||||
#endif
|
||||
|
||||
/* Set this to 0 if you do not want to provide
|
||||
tfp_sprintf/snprintf/vsprintf/vsnprintf */
|
||||
#ifndef TINYPRINTF_DEFINE_TFP_SPRINTF
|
||||
# define TINYPRINTF_DEFINE_TFP_SPRINTF 1
|
||||
#endif
|
||||
|
||||
/* Set this to 0 if you do not want tfp_printf and
|
||||
tfp_{vsn,sn,vs,s}printf to be also available as
|
||||
printf/{vsn,sn,vs,s}printf */
|
||||
#ifndef TINYPRINTF_OVERRIDE_LIBC
|
||||
# define TINYPRINTF_OVERRIDE_LIBC 1
|
||||
#endif
|
||||
|
||||
/* Optional external types dependencies */
|
||||
|
||||
#if TINYPRINTF_DEFINE_TFP_SPRINTF
|
||||
# include <sys/types.h> /* size_t */
|
||||
#endif
|
||||
|
||||
/* Declarations */
|
||||
|
||||
#ifdef __GNUC__
|
||||
# define _TFP_SPECIFY_PRINTF_FMT(fmt_idx,arg1_idx) \
|
||||
__attribute__((format (printf, fmt_idx, arg1_idx)))
|
||||
#else
|
||||
# define _TFP_SPECIFY_PRINTF_FMT(fmt_idx,arg1_idx)
|
||||
#endif
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
typedef void (*putcf) (void *, char);
|
||||
|
||||
/*
|
||||
'tfp_format' really is the central function for all tinyprintf. For
|
||||
each output character after formatting, the 'putf' callback is
|
||||
called with 2 args:
|
||||
- an arbitrary void* 'putp' param defined by the user and
|
||||
passed unmodified from 'tfp_format',
|
||||
- the character.
|
||||
The 'tfp_printf' and 'tfp_sprintf' functions simply define their own
|
||||
callback and pass to it the right 'putp' it is expecting.
|
||||
*/
|
||||
void tfp_format(void *putp, putcf putf, const char *fmt, va_list va);
|
||||
|
||||
#if TINYPRINTF_DEFINE_TFP_SPRINTF
|
||||
int tfp_vsnprintf(char *str, size_t size, const char *fmt, va_list ap);
|
||||
int tfp_snprintf(char *str, size_t size, const char *fmt, ...) \
|
||||
_TFP_SPECIFY_PRINTF_FMT(3, 4);
|
||||
int tfp_vsprintf(char *str, const char *fmt, va_list ap);
|
||||
int tfp_sprintf(char *str, const char *fmt, ...) \
|
||||
_TFP_SPECIFY_PRINTF_FMT(2, 3);
|
||||
# if TINYPRINTF_OVERRIDE_LIBC
|
||||
# define vsnprintf tfp_vsnprintf
|
||||
# define snprintf tfp_snprintf
|
||||
# define vsprintf tfp_vsprintf
|
||||
# define sprintf tfp_sprintf
|
||||
# endif
|
||||
#endif
|
||||
|
||||
#if TINYPRINTF_DEFINE_TFP_PRINTF
|
||||
void init_printf(void *putp, putcf putf);
|
||||
void tfp_printf(char *fmt, ...) _TFP_SPECIFY_PRINTF_FMT(1, 2);
|
||||
# if TINYPRINTF_OVERRIDE_LIBC
|
||||
# define printf tfp_printf
|
||||
# endif
|
||||
#endif
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif
|
||||
|
|
@ -13,8 +13,8 @@ EXTRA_SRCS :=
|
|||
|
||||
# Check the COMPILER variable passed via the command line
|
||||
ifeq ($(COMPILER), llvm)
|
||||
include $(PROGRAM_DIR)/../common/common-llvm.mk
|
||||
include $(PROGRAM_DIR)/../bsp/common-llvm.mk
|
||||
else
|
||||
include $(PROGRAM_DIR)/../common/common.mk
|
||||
include $(PROGRAM_DIR)/../bsp/common.mk
|
||||
endif
|
||||
|
||||
|
|
|
|||
|
|
@ -14,12 +14,13 @@
|
|||
|
||||
|
||||
#include "simple_system_common.h"
|
||||
#include "tinyprintf.h"
|
||||
|
||||
|
||||
|
||||
int main(int argc, char **argv) {
|
||||
|
||||
puts("Hello test instr\n");
|
||||
printf("Hello test instr\n");
|
||||
|
||||
unsigned int enc_instr64 = 0xBEAD0000; // Example value
|
||||
unsigned int dummy = 0xBADCAFE;
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue