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[Modified] rm redundant files

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bLueriVerLHR
2023-07-20 17:22:16 +08:00
parent 1b4c6eee10
commit 72c2b73ded
61 changed files with 1 additions and 2802 deletions
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74
CMakeLists.txt
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@@ -1,74 +0,0 @@
cmake_minimum_required(VERSION 3.12)
cmake_policy(SET CMP0074 NEW)
project(neula)
# 为 Verilator 设置环境变量
if(NOT DEFINED VERILATOR_ROOT)
set(ENV{VERILATOR_ROOT} "/home/blur/gits/verilator")
endif()
# 设置 Verilator 头文件目录
include_directories($ENV{VERILATOR_ROOT}/include)
# 设置编译器参数
if (${CMAKE_BUILD_TYPE} STREQUAL "Debug")
message("Turn On Debugger")
add_compile_options(-D DEBUG_MODE)
endif()
include_directories(${CMAKE_SOURCE_DIR}/include)
# ----- ----- 构建虚拟外设 ----- -----
set(LABUS labus)
set(LA_BUS_TARGET ${PROJECT_NAME}-bus)
# 包含头文件，以可以利用尖括号获取，辅助队友开发
include_directories(${CMAKE_SOURCE_DIR}/${LABUS}/include)
# 获取所有的 CXX 源文件
file(GLOB_RECURSE LABUS_SRC ${CMAKE_SOURCE_DIR}/${LABUS}/*.cc)
add_library(${LA_BUS_TARGET} ${LABUS_SRC})
link_libraries(${LA_BUS_TARGET})
# ----- ----- 构建虚拟处理器 ----- -----
set(LASIM lasim)
set(LA_SIM_TARGET ${PROJECT_NAME}-sim)
# 包含头文件，以可以利用尖括号获取，辅助队友开发
include_directories(${CMAKE_SOURCE_DIR}/${LASIM}/include)
# 获取所有的 CXX 源文件
file(GLOB_RECURSE LASIM_SRC ${CMAKE_SOURCE_DIR}/${LASIM}/*.cc)
add_executable(${LA_SIM_TARGET} ${LASIM_SRC})
# ----- ----- 构建操作系统 ----- -----
set(LAOS laos)
# add_custom_target(${LAOS} make build)
# ----- ----- 构建 Verilator 项目 ----- -----
# set(LACPU lacpu)
# set(LAVSIM lavsim)
# set(LA_VSIM_TARGET ${PROJECT_NAME}-vsim)
# find_package(verilator HINTS $ENV{VERILATOR_ROOT} ${VERILATOR_ROOT})
# if (NOT verilator_FOUND)
# message(FATAL_ERROR "Verilator was not found.")
# endif()
# # set default top module as top file
# set(VSRC ${CMAKE_SOURCE_DIR}/${LACPU}/rtl/soc_lite_top.v)
# # get all cxx source files from lavsim folder
# file(GLOB_RECURSE LAVSIM_SRC ${CMAKE_SOURCE_DIR}/${LAVSIM}/*.cc)
# add_executable(${LA_VSIM_TARGET} ${LAVSIM_SRC})
# verilate(${LA_VSIM_TARGET}
# INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/${LACPU}/rtl/cpu ${VERILATOR_ROOT}/include
# SOURCES ${VSRC})

0
Makefile
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24
README.md
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@@ -7,27 +7,3 @@
|文件夹名称|文件夹用处| |文件夹名称|文件夹用处|
|-|-| |-|-|
|lacpu | 龙芯处理器设计 Verilog | |lacpu | 龙芯处理器设计 Verilog |
|lasim | 龙芯模拟 软件模拟 C++ |
|lavsim | 龙芯模拟 Verilator 模拟 |
|labus | 龙芯虚拟外设 |
|laos | 龙芯操作系统 |
除了 `lavsim` 和 `lacpu` 是在一起编译成一个文件，其余都会编译成单独的二进制文件
### lacpu
### lasim
`lasim` 模拟龙芯行为，主要用于操作系统的软件模拟，通过软件角度对龙芯的基本硬件特性进行模拟，以辅助操作系统设计。
### lavsim
`lavsim` 主要用于测试 Verilog 设计的正确性。
### labus
`labus` 模拟外设行为，主要用于设计虚拟外设以软件模拟外设行为是否正确。
### laos
`laos` 自主设计操作系统，会参考其他项目进行设计。

36
include/common.h
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@@ -1,36 +0,0 @@
#pragma once
#include <cstdlib>
#include <cstdio>
#include <ctime>
#include <cstring>
#include <fstream>
#ifndef COMMON_H__
#define COMMON_H__
#ifdef DEBUG_MODE
#define Log(fmt, ...) printf("[%s:%d %ld] " fmt "\n", __FILE__, __LINE__, clock(), ## __VA_ARGS__)
#define panic(x) do { \
Log(x); \
exit(EXIT_FAILURE); \
} while (0)
#define panicifnot(cond) do { \
if (!(cond)) { \
Log(#cond " fail"); \
exit(EXIT_FAILURE); \
} \
} while (0)
#else
#define Log(...)
#define panic(x)
#define panicifnot(cond)
#endif
#endif

26
include/devaddr.h
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@@ -1,26 +0,0 @@
#pragma once
#ifndef DEVADDR_H__
#define DEVADDR_H__
#define RAM_ADDR 0x0000'0000
#define RST_ADDR 0x1c00'0000
#define HEAP_ADDR 0x2000'0000
#define HEAP_SIZE 0x0020'0000
#define STAK_SIZE 0x0002'0000
#define STAK_ADDR (HEAP_ADDR + HEAP_SIZE + STAK_SIZE)
#define DEVICE_BASE 0xa0000000
#define MMIO_BASE 0xa0000000
#define SERIAL_PORT (DEVICE_BASE + 0x00003f8)
#define KBD_ADDR (DEVICE_BASE + 0x0000060)
#define RTC_ADDR (DEVICE_BASE + 0x0000048)
#define VGACTL_ADDR (DEVICE_BASE + 0x0000100)
#define AUDIO_ADDR (DEVICE_BASE + 0x0000200)
#define DISK_ADDR (DEVICE_BASE + 0x0000300)
#define FB_ADDR (MMIO_BASE + 0x1000000)
#define AUDIO_SBUF_ADDR (MMIO_BASE + 0x1200000)
#endif

5
labus/device.cc
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@@ -1,5 +0,0 @@
#include <device.hh>
Device::Device(bool cacheable): cacheable_(cacheable) {}
bool Device::is_cacheable() { return cacheable_; }

148
labus/include/device.hh
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@@ -1,148 +0,0 @@
#pragma once
#include <cstdint>
#include <cstdlib>
class Device {
protected:
bool cacheable_ = false;
public:
Device(bool cacheable);
bool is_cacheable();
virtual const size_t &size() const = 0;
virtual void write(char *buf, size_t addr, size_t len) = 0;
virtual void read(char *buf, size_t addr, size_t len) = 0;
virtual void write64(uint64_t &dword, size_t addr) = 0;
virtual void read64(uint64_t &dword, size_t addr) = 0;
virtual void write32(uint32_t &word, size_t addr) = 0;
virtual void read32(uint32_t &word, size_t addr) = 0;
virtual void write16(uint16_t &hword, size_t addr) = 0;
virtual void read16(uint16_t &hword, size_t addr) = 0;
virtual void write8(uint8_t &byte, size_t addr) = 0;
virtual void read8(uint8_t &byte, size_t addr) = 0;
virtual ~Device() = default;
};
template <typename T>
class WRDevice : public Device{
protected:
size_t devsiz;
public:
WRDevice(size_t siz);
virtual const size_t &size() const;
virtual void write(char *buf, size_t addr, size_t len);
virtual void read(char *buf, size_t addr, size_t len);
virtual void write64(uint64_t &dword, size_t addr);
virtual void read64(uint64_t &dword, size_t addr);
virtual void write32(uint32_t &word, size_t addr);
virtual void read32(uint32_t &word, size_t addr);
virtual void write16(uint16_t &hword, size_t addr);
virtual void read16(uint16_t &hword, size_t addr);
virtual void write8(uint8_t &byte, size_t addr);
virtual void read8(uint8_t &byte, size_t addr);
virtual ~WRDevice() = default;
};
template <typename T>
WRDevice<T>::WRDevice(size_t siz) : devsiz(siz) {}
template <typename T>
const size_t &WRDevice<T>::size() const { return devsiz; }
template <typename T>
void WRDevice<T>::write(char *buf, size_t addr, size_t len) {}
template <typename T>
void WRDevice<T>::read(char *buf, size_t addr, size_t len) {}
template <typename T>
void WRDevice<T>::write64(uint64_t &dword, size_t addr) {
uint8_t buf[sizeof(dword)];
buf[0] = (dword >> 0) & 0xFF;
buf[1] = (dword >> 8) & 0xFF;
buf[2] = (dword >> 16) & 0xFF;
buf[3] = (dword >> 24) & 0xFF;
buf[4] = (dword >> 32) & 0xFF;
buf[5] = (dword >> 40) & 0xFF;
buf[6] = (dword >> 48) & 0xFF;
buf[7] = (dword >> 56) & 0xFF;
static_cast<T *>(this)->write((char *)buf, addr, sizeof(dword));
}
template <typename T>
void WRDevice<T>::read64(uint64_t &dword, size_t addr) {
uint8_t buf[sizeof(dword)];
static_cast<T *>(this)->read((char *)buf, addr, sizeof(dword));
dword = (uint64_t) buf[0];
dword |= (uint64_t) buf[1] << 8;
dword |= (uint64_t) buf[2] << 16;
dword |= (uint64_t) buf[3] << 24;
dword |= (uint64_t) buf[4] << 32;
dword |= (uint64_t) buf[5] << 40;
dword |= (uint64_t) buf[6] << 48;
dword |= (uint64_t) buf[7] << 56;
}
template <typename T>
void WRDevice<T>::write32(uint32_t &word, size_t addr) {
uint8_t buf[sizeof(word)];
buf[0] = (word >> 0) & 0xFF;
buf[1] = (word >> 8) & 0xFF;
buf[2] = (word >> 16) & 0xFF;
buf[3] = (word >> 24) & 0xFF;
static_cast<T *>(this)->write((char *)buf, addr, sizeof(word));
}
template <typename T>
void WRDevice<T>::read32(uint32_t &word, size_t addr) {
uint8_t buf[sizeof(word)];
static_cast<T *>(this)->read((char *)buf, addr, sizeof(word));
word = (uint32_t) buf[0];
word |= (uint32_t) buf[1] << 8;
word |= (uint32_t) buf[2] << 16;
word |= (uint32_t) buf[3] << 24;
}
template <typename T>
void WRDevice<T>::write16(uint16_t &hword, size_t addr) {
uint8_t buf[sizeof(hword)];
buf[0] = (hword >> 0) & 0xFF;
buf[1] = (hword >> 8) & 0xFF;
static_cast<T *>(this)->write((char *)buf, addr, sizeof(hword));
}
template <typename T>
void WRDevice<T>::read16(uint16_t &hword, size_t addr) {
uint8_t buf[sizeof(hword)];
static_cast<T *>(this)->read((char *)buf, addr, sizeof(hword));
hword = (uint16_t) buf[0];
hword |= (uint16_t) buf[1] << 8;
}
template <typename T>
void WRDevice<T>::write8(uint8_t &byte, size_t addr) {
static_cast<T *>(this)->write((char *)&byte, addr, sizeof(byte));
}
template <typename T>
void WRDevice<T>::read8(uint8_t &byte, size_t addr) {
static_cast<T *>(this)->read((char *)&byte, addr, sizeof(byte));
}

19
labus/include/memory.hh
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@@ -1,19 +0,0 @@
#pragma once
#include <device.hh>
class Memory : public WRDevice<Memory> {
char *data;
bool wen;
bool ren;
bool xen;
public:
Memory(size_t siz, bool w = true, bool r = true, bool x = true);
~Memory();
void load(const char *path);
void load(Memory *mem, size_t addr, size_t len);
void write(char *buf, size_t addr, size_t len);
void read(char *buf, size_t addr, size_t len);
};

10
labus/include/serial.hh
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@@ -1,10 +0,0 @@
#pragma once
#include <device.hh>
class Serial : public WRDevice<Serial> {
public:
Serial(size_t siz);
void write(char *buf, size_t addr, size_t len);
};

33
labus/include/sysbus.hh
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@@ -1,33 +0,0 @@
#pragma once
#include <cstdint>
#include <cstdlib>
#include <map>
#include <device.hh>
class SystemBus {
std::map<uint64_t, Device *> iomap_;
std::pair<const uint64_t, Device *> &finddev(uint64_t addr);
public:
SystemBus() = default;
void regdev(Device *dev, uint64_t addr);
void write(char *buf, size_t addr, size_t len);
void read(char *buf, size_t addr, size_t len);
void write64(uint64_t &dword, size_t addr);
void read64(uint64_t &dword, size_t addr);
void write32(uint32_t &word, size_t addr);
void read32(uint32_t &word, size_t addr);
void write16(uint16_t &hword, size_t addr);
void read16(uint16_t &hword, size_t addr);
void write8(uint8_t &byte, size_t addr);
void read8(uint8_t &byte, size_t addr);
};

40
labus/memory.cc
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@@ -1,40 +0,0 @@
#include <memory.hh>
#include <common.h>
Memory::Memory(size_t siz, bool w, bool r, bool x)
: WRDevice(siz), wen(w), ren(r), xen(x) {
data = new char[siz];
memset((void *)data, 0, siz);
}
Memory::~Memory() {
if (data) {
delete [] data;
}
}
void Memory::load(const char *path) {
std::fstream ifs(path, std::ios::in | std::ios::binary);
panicifnot(ifs);
ifs.read(data, this->size());
ifs.close();
}
void Memory::load(Memory *mem, size_t addr, size_t len) {
panicifnot(addr + len < this->size());
memcpy(&data[addr], mem->data, len);
}
void Memory::write(char *buf, size_t addr, size_t len) {
if (!wen)
panic("permission denied");
size_t actlen = addr + len >= this->size() ? this->size() - addr : len;
memcpy(&data[addr], buf, actlen);
}
void Memory::read(char *buf, size_t addr, size_t len) {
if (!ren)
panic("permission denied");
size_t actlen = addr + len >= this->size() ? this->size() - addr : len;
memcpy(buf, &data[addr], actlen);
}

10
labus/serial.cc
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@@ -1,10 +0,0 @@
#include <serial.hh>
#include <common.h>
Serial::Serial(size_t siz) : WRDevice(siz) {}
void Serial::write(char *buf, size_t addr, size_t len) {
for (size_t i = 0; i < len; ++i)
putc(buf[i], stdout);
fflush(stdout);
}

66
labus/sysbus.cc
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@@ -1,66 +0,0 @@
#include <sysbus.hh>
#include <common.h>
std::pair<const uint64_t, Device *> &SystemBus::finddev(uint64_t addr) {
Device *dev = nullptr;
auto &&iter = iomap_.upper_bound(addr);
if (iter == iomap_.begin())
panic("device not found");
iter--;
if (iter->first <= addr && iter->first + iter->second->size() > addr)
dev = iter->second;
panicifnot(dev);
return *iter;
}
void SystemBus::regdev(Device *dev, uint64_t addr) { iomap_.emplace(addr, dev); }
void SystemBus::write(char *buf, size_t addr, size_t len) {
auto &&dev = finddev(addr);
dev.second->write(buf, addr - dev.first, len);
}
void SystemBus::read(char *buf, size_t addr, size_t len) {
auto &&dev = finddev(addr);
dev.second->read(buf, addr - dev.first, len);
}
void SystemBus::write64(uint64_t &dword, size_t addr) {
auto &&dev = finddev(addr);
dev.second->write64(dword, addr - dev.first);
}
void SystemBus::read64(uint64_t &dword, size_t addr) {
auto &&dev = finddev(addr);
dev.second->read64(dword, addr - dev.first);
}
void SystemBus::write32(uint32_t &word, size_t addr) {
auto &&dev = finddev(addr);
dev.second->write32(word, addr - dev.first);
}
void SystemBus::read32(uint32_t &word, size_t addr) {
auto &&dev = finddev(addr);
dev.second->read32(word, addr - dev.first);
}
void SystemBus::write16(uint16_t &hword, size_t addr) {
auto &&dev = finddev(addr);
dev.second->write16(hword, addr - dev.first);
}
void SystemBus::read16(uint16_t &hword, size_t addr) {
auto &&dev = finddev(addr);
dev.second->read16(hword, addr - dev.first);
}
void SystemBus::write8(uint8_t &byte, size_t addr) {
auto &&dev = finddev(addr);
dev.second->write8(byte, addr - dev.first);
}
void SystemBus::read8(uint8_t &byte, size_t addr) {
auto &&dev = finddev(addr);
dev.second->read8(byte, addr - dev.first);
}

1
laos/.gitignore vendored
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@@ -1 +0,0 @@
build/

76
laos/Makefile
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@@ -1,76 +0,0 @@
LA_BIN_PATH := $(CURDIR)/../ext/loongarch32r-linux-gnusf-2022-05-20/bin
LA_PREFIX := loongarch32r-linux-gnusf-
CC := $(LA_BIN_PATH)/$(LA_PREFIX)gcc
CXX := $(LA_BIN_PATH)/$(LA_PREFIX)g++
OD := $(LA_BIN_PATH)/$(LA_PREFIX)objdump
OC := $(LA_BIN_PATH)/$(LA_PREFIX)objcopy
RE := $(LA_BIN_PATH)/$(LA_PREFIX)readelf
NPROC := $(shell nproc)
CMAKE := cmake
BUILD_DIR := build
ABS_BUILD := $(CURDIR)/$(BUILD_DIR)
$(shell mkdir -p $(BUILD_DIR))
BIN := neula-os
BINARY := $(BUILD_DIR)/$(BIN)
TOP_SRC_DIR := src
MODULES := kernel util
SOURCE_DIRS := $(addprefix $(TOP_SRC_DIR)/,$(MODULES))
MK_DIRS := $(addprefix MAKE/,$(SOURCE_DIRS))
ALL_SRCS := $(shell find . -name '*.c')
LD_CSRIPT := kernel.ld
EXTRA_MACRO := # NDEBUG
EXTRA_FLAGS = -Wall -Werror -O0 -fno-omit-frame-pointer -ggdb -gdwarf-2
EXTRA_FLAGS += -mfpu=none -march=loongarch32r -mabi=ilp32s
EXTRA_FLAGS += -MD
EXTRA_FLAGS += -ffreestanding -fno-common -nostdlib
EXTRA_FLAGS += -I.
EXTRA_FLAGS += -fno-pie -no-pie
EXTRA_FLAGS += $(shell $(CC) -fno-stack-protector -E -x c /dev/null >/dev/null 2>&1 && echo -fno-stack-protector)
COMMONFLAGS := $(EXTRA_FLAGS)
CPPFLAGS += $(addprefix -D,$(EXTRA_MACRO)) -I$(CURDIR)/include
CFLAGS += $(COMMONFLAGS)
LDFLAGS += $(COMMONFLAGS) -z max-page-size=4096 -T$(LD_CSRIPT)
.PHONY: all build clean
all: build
$(MK_DIRS): MAKE/%:% $(shell find $(%) -name '*.c')
@TOP_BUILD_DIR=$(ABS_BUILD) \
CC=$(CC) \
CPPFLAGS="$(CPPFLAGS)" \
CFLAGS="$(CFLAGS)" \
LDFLAGS="$(LDFLAGS)" \
$(MAKE) -C $< -j$(NPROC)
build: $(MK_DIRS)
@$(CC) -o $(BINARY) $(shell find $(BUILD_DIR) -name '*.o') $(CPPFLAGS) $(CFLAGS) $(LDFLAGS)
@$(OD) -D $(BINARY) > $(BINARY).dump
@$(RE) -a $(BINARY) > $(BINARY).info
@$(OC) $(BINARY) -O binary $(BINARY).bin
clean:
rm -rf $(BUILD_DIR)
# use native
clean-usr:
rm -rf $(BUILD_DIR)/user
usr:
@TOP_BUILD_DIR=$(ABS_BUILD) \
CPPFLAGS="$(CPPFLAGS)" \
$(MAKE) native -C $(TOP_SRC_DIR)/user -j$(NPROC)
tcpl:
$(CC) --target-help

38
laos/include/asm.h
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@@ -1,38 +0,0 @@
#include "defs.h"
#ifndef ASM_H__
#define ASM_H__
// CSR infos
#define CRMD 0x000 /* 当前模式信息 */
#define PRMD 0x001 /* 例外前模式信息 */
#define EUEN 0x002 /* 拓展部件使能 */
#define ECFG 0x004 /* 例外配置 */
#define ESTAT 0x005 /* 例外状态 */
#define ERA 0x006 /* 例外返回地址 */
#define BADV 0x007 /* 出错虚地址 */
#define EENTRY 0x00c /* 例外地址入口 */
#define TLBIDX 0x010 /* TLB 索引 */
#define TLBEHI 0x011 /* TLB 表项高位 */
#define TLBELO0 0x012 /* TLB 表项低位 0 */
#define TLBELO1 0x013 /* TLB 表项低位 1 */
#define ASID 0x018 /* 地址空间标识符 */
#define PGDL 0x019 /* 低半地址空间全局目录基址 */
#define PGDH 0x01a /* 高半地址空间全局目录基址 */
#define PGD 0x01b /* 全局目录基址 */
#define CPUID 0x020 /* 处理器编号 */
#define SAVE0 0x030 /* 数据保存 0*/
#define SAVE1 0x031 /* 数据保存 1*/
#define SAVE2 0x032 /* 数据保存 2 */
#define SAVE3 0x033 /* 数据保存 3 */
#define TID 0x040 /* 定时器编号 */
#define TCFG 0x041 /* 定时器配置 */
#define TVAL 0x042 /* 定时器值 */
#define TICLR 0x044 /* 定时中断清除 */
#define LLBCTL 0x060 /* LLBit 控制 */
#define TLBRENTRY 0x088 /* TLB 重填例外入口 */
#define CTAG 0x098 /* 高速缓存标签 */
#define DMW0 0x180 /* 直接映射配置窗口 0 */
#define DMW1 0x181 /* 直接映射配置窗口 1 */
#endif

6
laos/include/console.h
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@@ -1,6 +0,0 @@
#ifndef CONSOLE_H__
#define CONSOLE_H__
void consputc(int c);
#endif

14
laos/include/defs.h
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@@ -1,14 +0,0 @@
#ifndef DEFS_H__
#define DEFS_H__
#define NULL ((void *)0)
#define NCPU 1
#define NPROC 64
#define NOFILE 16
#define SERIAL_TX_BUF_SIZE 32
#endif

6
laos/include/dev.h
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@@ -1,6 +0,0 @@
#ifndef DEV_H__
#define DEV_H__
extern char ioports[];
#endif

10
laos/include/fcntl.h
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@@ -1,10 +0,0 @@
#ifndef FCNTL_H__
#define FCNTL_H__
#define O_RDONLY 0x000
#define O_WRONLY 0x001
#define O_RDWR 0x002
#define O_CREATE 0x200
#define O_TRUNC 0x400
#endif

9
laos/include/filepath.h
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@@ -1,9 +0,0 @@
#ifndef FILEPATH_H__
#define FILEPATH_H__
char *basename(char *bnm, const char *path);
char *rmext(char *noext, const char *fname);
char *bearname(char *bnm, const char *fname);
#endif

0
laos/include/filesys.h
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11
laos/include/kernel.h
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@@ -1,11 +0,0 @@
#include "defs.h"
#ifndef KERNEL_H__
#define KERNEL_H__
void _entry() __attribute__ ((section (".entry")));
void start();
void main();
#endif

8
laos/include/kprintf.h
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@@ -1,8 +0,0 @@
#ifndef KPRINTF_H__
#define KPRINTF_H__
void kprintf(char *fmt, ...);
void panic(char *s);
#endif

106
laos/include/la32r.h
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@@ -1,106 +0,0 @@
#include "asm.h"
#include "defs.h"
#include "latype.h"
#include "macro.h"
#ifndef __loongarch32r
#define __loongarch32r
#endif
#include "larchintrin.h"
#ifndef LA32R_H__
#define LA32R_H__
static inline uint r_crmd() {
uint recv;
asm volatile ("csrrd %0, " TOSTRING(CRMD) : "=r" (recv));
return recv;
}
static inline void w_crmd(uint wdata) {
asm volatile ("csrwr %0, " TOSTRING(CRMD) : "=r" (wdata));
}
static inline void w_eentry(uint wdata) {
asm volatile ("csrwr %0, " TOSTRING(EENTRY) : "=r" (wdata));
}
static inline uint r_cpuid() {
uint recv;
asm volatile ("csrrd %0, " TOSTRING(CPUID) : "=r" (recv));
return recv;
}
//
// specified register io
//
static inline uint r_sp() {
uint recv;
asm volatile ("add.w %0, $sp, $zero" : "=r" (recv));
return recv;
}
static inline uint r_tp() {
uint recv;
asm volatile ("add.w %0, $tp, $zero" : "=r" (recv));
return recv;
}
static inline void w_tp(uint wdata) {
asm volatile("add.w $tp, %0, $zero" : : "r" (wdata));
}
static inline uint r_ra() {
uint recv;
asm volatile ("add.w %0, $ra, $zero" : "=r" (recv));
return recv;
}
//
// mem misc
//
// need to be tested
static inline void synchronize() {
__dbar(0);
__ibar(0);
}
//
// tlb misc
//
//
// cache misc
//
//
// atomic
//
static inline uint llw(intptr_t addr) {
uint recv;
asm volatile ("ll.w %0, %1, 0": "=r" (recv) : "r" (addr));
return recv;
}
static inline uint scw(uint wdata, intptr_t addr) {
uint recv;
asm volatile (
"add.w %0, %1, $zero" "\n\t"
"sc.w %0, %2, 0"
: "=r" (recv)
: "r" (wdata),
"r" (addr));
return recv;
}
#endif

22
laos/include/latype.h
View File

@@ -1,22 +0,0 @@
#ifndef LATYPE_H__
#define LATYPE_H__
typedef char i8;
typedef unsigned char u8;
typedef unsigned char uchar;
typedef short i16;
typedef unsigned short u16;
typedef unsigned short ushort;
typedef int i32;
typedef unsigned int u32;
typedef unsigned int uint;
typedef unsigned int size_t;
typedef unsigned int intptr_t;
typedef u32 pte_t;
typedef u32 *pagetable_t;
#endif

7
laos/include/macro.h
View File

@@ -1,7 +0,0 @@
#ifndef MACRO_H__
#define MACRO_H__
#define TOSTRING_(x) #x
#define TOSTRING(x) TOSTRING_(x)
#endif

11
laos/include/memio.h
View File

@@ -1,11 +0,0 @@
#include "latype.h"
#ifndef MEMIO_H__
#define MEMIO_H__
#define memb(addr) (*(u8 *)(addr))
#define memh(addr) (*(u16 *)(addr))
#define memw(addr) (*(u32 *)(addr))
#endif

9
laos/include/memlayout.h
View File

@@ -1,9 +0,0 @@
#ifndef MEMLAYOUT_H__
#define MEMLAYOUT_H__
#define DEV_BASE_ADDR 0xa0000000
#define SERIAL_OFFSET 0x00000000
#endif

117
laos/include/proc.h
View File

@@ -1,117 +0,0 @@
#include "latype.h"
#include "defs.h"
#include "spinlock.h"
#ifndef PROC_H__
#define PROC_H__
// Saved registers for kernel context switches.
struct context {
u32 ra;
u32 sp;
// callee-saved
u32 s0;
u32 s1;
u32 s2;
u32 s3;
u32 s4;
u32 s5;
u32 s6;
u32 s7;
u32 s8;
u32 s9;
};
// Per-CPU state.
struct cpu {
struct proc *proc; // The process running on this cpu, or null.
struct context context; // swtch() here to enter scheduler().
int noff; // Depth of push_off() nesting.
int intena; // Were interrupts enabled before push_off()?
};
extern struct cpu cpus[NCPU];
// per-process data for the trap handling code in trampoline.S.
// sits in a page by itself just under the trampoline page in the
// user page table. not specially mapped in the kernel page table.
// uservec in trampoline.S saves user registers in the trapframe,
// then initializes registers from the trapframe's
// kernel_sp, kernel_hartid, kernel_satp, and jumps to kernel_trap.
// usertrapret() and userret in trampoline.S set up
// the trapframe's kernel_*, restore user registers from the
// trapframe, switch to the user page table, and enter user space.
// the trapframe includes callee-saved user registers like s0-s11 because the
// return-to-user path via usertrapret() doesn't return through
// the entire kernel call stack.
struct trapframe {
/* 0 */ u32 kernel_satp; // kernel page table
/* 4 */ u32 kernel_sp; // top of process's kernel stack
/* 8 */ u32 kernel_trap; // usertrap()
/* 12 */ u32 eenrty; // saved user program counter
/* 16 */ u32 kernel_hartid; // saved kernel tp
/* 20 */ u32 ra;
/* 24 */ u32 tp;
/* 28 */ u32 sp;
/* 32 */ u32 a0;
/* 36 */ u32 a1;
/* 40 */ u32 a2;
/* 44 */ u32 a3;
/* 48 */ u32 a4;
/* 52 */ u32 a5;
/* 56 */ u32 a6;
/* 60 */ u32 a7;
/* 64 */ u32 t0;
/* 68 */ u32 t1;
/* 72 */ u32 t2;
/* 76 */ u32 t3;
/* 80 */ u32 t4;
/* 84 */ u32 t5;
/* 88 */ u32 t6;
/* 92 */ u32 t7;
/* 96 */ u32 t8;
/* 100 */ u32 r21;
/* 104 */ u32 s9;
/* 108 */ u32 s0;
/* 112 */ u32 s1;
/* 116 */ u32 s2;
/* 120 */ u32 s3;
/* 124 */ u32 s4;
/* 128 */ u32 s5;
/* 132 */ u32 s6;
/* 136 */ u32 s7;
/* 140 */ u32 s8;
};
enum procstate { UNUSED, USED, SLEEPING, RUNNABLE, RUNNING, ZOMBIE };
// Per-process state
struct proc {
struct spinlock lock;
// p->lock must be held when using these:
enum procstate state; // Process state
void *chan; // If non-zero, sleeping on chan
int killed; // If non-zero, have been killed
int xstate; // Exit status to be returned to parent's wait
int pid; // Process ID
// wait_lock must be held when using this:
struct proc *parent; // Parent process
// these are private to the process, so p->lock need not be held.
u32 kstack; // Virtual address of kernel stack
u32 sz; // Size of process memory (bytes)
pagetable_t pagetable; // User page table
struct trapframe *trapframe; // data page for trampoline.S
struct context context; // swtch() here to run process
struct file *ofile[NOFILE]; // Open files
struct inode *cwd; // Current directory
char name[16]; // Process name (debugging)
};
struct cpu *mycpu();
#endif

23
laos/include/spinlock.h
View File

@@ -1,23 +0,0 @@
#include "latype.h"
#ifndef SPINLOCK_H__
#define SPINLOCK_H__
struct spinlock {
uint locked;
// debugging
char *name;
struct cpu *cpu;
};
void initlock(struct spinlock *lck, char *name);
void acquire(struct spinlock *lck);
void release(struct spinlock *lck);
int holding(struct spinlock *lck);
void push_off();
void pop_off();
#endif

16
laos/include/string.h
View File

@@ -1,16 +0,0 @@
#include "latype.h"
#ifndef STRING_H__
#define STRING_H__
void *memset (void *dst , int c, uint n);
int memcmp (const void *m1, const void *m2, uint n);
void *memmove (void *dst, const void *src, uint n);
void *memcpy (void *dst, const void *src, uint n);
int strncmp (const char *p, const char *q, uint n);
char *strncpy (char *s, const char *t, int n);
char *strcpy_s(char *s, const char *t, int n);
int strlen (const char *s);
#endif

9
laos/include/unistd.h
View File

@@ -1,9 +0,0 @@
#ifndef UNISTD_H__
#define UNISTD_H__
/* Standard file descriptors. */
#define STDIN_FILENO 0 /* Standard input. */
#define STDOUT_FILENO 1 /* Standard output. */
#define STDERR_FILENO 2 /* Standard error output. */
#endif

0
laos/include/util.h
View File

42
laos/kernel.ld
View File

@@ -1,42 +0,0 @@
OUTPUT_ARCH( "loongarch32r" )
ENTRY( _entry )
SECTIONS
{
/*
* ensure that entry.S / _entry is at 0x1C000000,
*/
. = 0x1C000000;
.text : {
*(.entry)
. = ALIGN(0x1000);
*(.text .text.*)
. = ALIGN(0x1000);
PROVIDE(etext = .);
}
.rodata : {
. = ALIGN(16);
*(.srodata .srodata.*) /* do not need to distinguish this from .rodata */
. = ALIGN(16);
*(.rodata .rodata.*)
}
.data : {
. = ALIGN(16);
*(.sdata .sdata.*) /* do not need to distinguish this from .data */
. = ALIGN(16);
*(.data .data.*)
}
.bss : {
. = ALIGN(16);
*(.sbss .sbss.*) /* do not need to distinguish this from .bss */
. = ALIGN(16);
*(.bss .bss.*)
}
PROVIDE(end = .);
PROVIDE(ioports = 0xa0000000);
}

21
laos/src/dev/Makefile
View File

@@ -1,21 +0,0 @@
CURNAME := dev
BUILD_DIR := $(TOP_BUILD_DIR)/$(CURNAME)
CSRC := $(wildcard *.c)
OBJS := $(patsubst %.c,%.o,$(CSRC))
BUILD_OBJS := $(addprefix $(BUILD_DIR)/,$(OBJS))
.PHONY: build all message
all: message build
$(BUILD_DIR):
@mkdir -p $(BUILD_DIR)
$(BUILD_OBJS): $(BUILD_DIR)/%.o:%.c $(BUILD_DIR)
@$(CC) -c -o $@ $< $(CPPFLAGS) $(CFLAGS)
build: $(BUILD_OBJS)
message:
@echo "building $(CURNAME)"

3
laos/src/dev/dev.c
View File

@@ -1,3 +0,0 @@
#include "dev.h"
char ioports[];

31
laos/src/dev/serial.c
View File

@@ -1,31 +0,0 @@
#include "memlayout.h"
#include "latype.h"
#include "memio.h"
#include "defs.h"
struct spinlock serial_tx_lock;
char serial_tx_buf[SERIAL_TX_BUF_SIZE];
u32 serial_tx_w; // write next to serial_tx_buf[serial_tx_w % SERIAL_TX_BUF_SIZE]
u32 serial_tx_r; // read next from serial_tx_buf[serial_tx_r % SERIAL_TX_BUF_SIZE]
void serial_putc(int c) {
acquire(&serial_tx_lock);
// if(panicked){
// for(;;)
// ;
// }
while(serial_tx_w == serial_tx_r + SERIAL_TX_BUF_SIZE){
// buffer is full.
// wait for serialstart() to open up space in the buffer.
// sleep(&serial_tx_r, &serial_tx_lock);
}
serial_tx_buf[serial_tx_w % SERIAL_TX_BUF_SIZE] = c;
serial_tx_w += 1;
// serialstart();
release(&serial_tx_lock);
}

28
laos/src/kernel/Makefile
View File

@@ -1,28 +0,0 @@
CURNAME := kernel
BUILD_DIR := $(TOP_BUILD_DIR)/$(CURNAME)
CSRC := $(wildcard *.c)
OBJS := $(patsubst %.c,%.o,$(CSRC))
BUILD_OBJS := $(addprefix $(BUILD_DIR)/,$(OBJS))
ASSRC := $(wildcard *.S)
ASOBJ := $(patsubst %.S,%.o,$(ASSRC))
BUILD_ASOBJ := $(addprefix $(BUILD_DIR)/,$(ASOBJ))
.PHONY: build all message
all: message build
$(BUILD_DIR):
@mkdir -p $(BUILD_DIR)
$(BUILD_OBJS): $(BUILD_DIR)/%.o:%.c $(BUILD_DIR)
@$(CC) -c -o $@ $< $(CPPFLAGS) $(CFLAGS)
$(BUILD_ASOBJ): $(BUILD_DIR)/%.o:%.S $(BUILD_DIR)
@$(CC) -c -o $@ $< $(CPPFLAGS) $(CFLAGS)
build: $(BUILD_OBJS) $(BUILD_ASOBJ)
message:
@echo "building $(CURNAME)"

28
laos/src/kernel/console.c
View File

@@ -1,28 +0,0 @@
#include "console.h"
#include "memio.h"
#include "memlayout.h"
#include "spinlock.h"
#include "dev.h"
void consputc(int c) {
volatile char *out = &ioports[SERIAL_OFFSET];
if (c == '\b') {
*out = '\b';
*out = ' ';
*out = '\b';
return;
}
*out = c;
}
struct {
struct spinlock lock;
// input
#define INPUT_BUF_SIZE 128
char buf[INPUT_BUF_SIZE];
uint r; // Read index
uint w; // Write index
uint e; // Edit index
} cons;

20
laos/src/kernel/entry.S
View File

@@ -1,20 +0,0 @@
#include "asm.h"
.section .entry
.global _entry
_entry:
# set up a stack for C.
# stack0 is declared in start.c,
# with a 4096-byte stack per CPU.
# sp = stack0 + (hartid * 4096)
la.global $sp, stack0
lu12i.w $a0, (1024*4 >> 12) & 0xfffff
addi.w $a0, $a0, 1024*4 & 0xfff
csrrd $a1, CPUID
addi.w $a1, $a1, 1
mul.w $a0, $a0, $a1
add.w $sp, $sp, $a0
# jump to start() in start.c
bl start
spin:
b spin

1
laos/src/kernel/kalloc.c
View File

@@ -1 +0,0 @@
extern char end[];

116
laos/src/kernel/kprintf.c
View File

@@ -1,116 +0,0 @@
#include <stdarg.h>
#include "latype.h"
#include "console.h"
#include "kprintf.h"
#include "spinlock.h"
volatile int panicked = 0;
// lock to avoid interleaving concurrent printf's.
static struct {
struct spinlock lock;
int locking;
} pr;
static char digits[] = "0123456789abcdef";
static void print_int(int xx, int base, int sign) {
char buf[32];
int i;
uint x;
if (sign && (sign = xx < 0)) {
x = -xx;
} else {
x = xx;
}
i = 0;
do {
buf[i++] = digits[x % base];
} while ((x /= base) != 0);
if(sign) {
buf[i++] = '-';
}
while(--i >= 0)
consputc(buf[i]);
}
static void print_ptr(intptr_t x) {
consputc('0');
consputc('x');
for (int i = 0; i < (sizeof(intptr_t) * 2); i++, x <<= 4)
consputc(digits[x >> (sizeof(intptr_t) * 8 - 4)]);
}
void kprintf(char *fmt, ...) {
va_list ap;
int i, c, locking;
char *s;
locking = pr.locking;
if(locking)
acquire(&pr.lock);
if (fmt == 0)
panic("null fmt");
va_start(ap, fmt);
for (i = 0; (c = fmt[i] & 0xff) != 0; i++) {
if (c != '%') {
consputc(c);
continue;
}
c = fmt[++i] & 0xff;
if (c == 0) {
break;
}
switch (c) {
case 'd':
print_int(va_arg(ap, int), 10, 1);
break;
case 'x':
print_int(va_arg(ap, int), 16, 1);
break;
case 'p':
print_ptr(va_arg(ap, intptr_t));
break;
case 's':
if((s = va_arg(ap, char*)) == 0)
s = "(null)";
for(; *s; s++)
consputc(*s);
break;
case '%':
consputc('%');
break;
default:
// Print unknown % sequence to draw attention.
consputc('%');
consputc(c);
break;
}
}
va_end(ap);
if(locking)
release(&pr.lock);
}
void panic(char *s) {
pr.locking = 0;
kprintf("panic: ");
kprintf(s);
kprintf("\n");
panicked = 1; // freeze serial output from other CPUs
for(;;)
;
}
void kprintf_init(void) {
initlock(&pr.lock, "pr");
pr.locking = 1;
}

25
laos/src/kernel/main.c
View File

@@ -1,25 +0,0 @@
#include "la32r.h"
#include "spinlock.h"
volatile static int started = 0;
void main() {
struct spinlock lck[1];
initlock(lck, "main");
acquire(lck);
if (r_cpuid() == 0) {
synchronize();
started = 1;
} else {
// 当前假定只有一个 hart
while (started == 0)
;
synchronize();
}
}

24
laos/src/kernel/proc.c
View File

@@ -1,24 +0,0 @@
#include "proc.h"
#include "la32r.h"
#include "latype.h"
struct cpu cpus[NCPU];
struct proc proc[NPROC];
struct proc *initproc;
int nextpid = 1;
struct spinlock pid_lock;
// helps ensure that wakeups of wait()ing
// parents are not lost. helps obey the
// memory model when using p->parent.
// must be acquired before any p->lock.
struct spinlock wait_lock;
struct cpu *mycpu() {
int id = r_cpuid();
struct cpu *c = &cpus[id];
return c;
}

54
laos/src/kernel/spinlock.c
View File

@@ -1,54 +0,0 @@
#include "spinlock.h"
#include "la32r.h"
#include "defs.h"
#include "kprintf.h"
#include "proc.h"
void initlock(struct spinlock *lck, char *name) {
lck->name = name;
lck->locked = 0;
lck->cpu = 0;
}
void acquire(struct spinlock *lck) {
if(holding(lck)) {
panic("acquire");
}
do {
// 如果已经上锁了，就等待
while (llw((intptr_t)&lck->locked) == 1)
;
// 此时没有上锁，那就开始抢锁
// 没有抢成功就进入新的循环
} while (scw(1, (intptr_t)&lck->locked) != 1);
synchronize();
lck->cpu = mycpu();
}
void release(struct spinlock *lck) {
if (holding(lck) != 1) {
panic("release");
}
lck->cpu = NULL;
synchronize();
do {
// 标记上
llw((intptr_t)&lck->locked);
// 此时没有 hart 动，那就安全的释放
// 否则重新循环
} while (scw(0, (intptr_t)&lck->locked) != 1);
}
int holding(struct spinlock *lck) {
int r;
r = (lck->locked && lck->cpu == mycpu());
return r;
}

20
laos/src/kernel/start.c
View File

@@ -1,20 +0,0 @@
#include "kernel.h"
#include "la32r.h"
__attribute__ ((aligned (16))) char stack0[4096 * NCPU];
void start() {
// 设置特权等级
volatile u32 crmd_info = r_crmd();
crmd_info = crmd_info & 0xfffffffc;
w_crmd(crmd_info);
// ERTN 返回地址
w_eentry((intptr_t)main);
// 设置 tp
int id = r_cpuid();
w_tp(id);
asm volatile("ertn");
}

1
laos/src/kernel/vm.c
View File

@@ -1 +0,0 @@
extern char etext[];

21
laos/src/lib/Makefile
View File

@@ -1,21 +0,0 @@
CURNAME := lib
BUILD_DIR := $(TOP_BUILD_DIR)/$(CURNAME)
CSRC := $(wildcard *.c)
OBJS := $(patsubst %.c,%.o,$(CSRC))
BUILD_OBJS := $(addprefix $(BUILD_DIR)/,$(OBJS))
.PHONY: build all message
all: message build
$(BUILD_DIR):
@mkdir -p $(BUILD_DIR)
$(BUILD_OBJS): $(BUILD_DIR)/%.o:%.c $(BUILD_DIR)
@$(CC) -c -o $@ $< $(CPPFLAGS) $(CFLAGS)
build: $(BUILD_OBJS)
message:
@echo "building $(CURNAME)"

0
laos/src/lib/path.c
View File

29
laos/src/user/Makefile
View File

@@ -1,29 +0,0 @@
CURNAME := user
BUILD_DIR := $(TOP_BUILD_DIR)/$(CURNAME)
CSRC := $(wildcard *.c)
OBJS := $(patsubst %.c,%.o,$(CSRC))
BUILD_OBJS := $(addprefix $(BUILD_DIR)/,$(OBJS))
BASENAMES := $(basename $(CSRC))
BUILD_EXE := $(addprefix $(BUILD_DIR)/,$(BASENAMES))
.PHONY: build all message
all: message build
$(BUILD_DIR):
@mkdir -p $(BUILD_DIR)
$(BUILD_OBJS): $(BUILD_DIR)/%.o:%.c $(BUILD_DIR)
@$(CC) -c -o $@ $< $(CPPFLAGS) $(CFLAGS)
$(BUILD_EXE): %:%.o
@$(CC) -o $@ $< $(CPPFLAGS) $(CFLAGS)
build: $(BUILD_EXE)
message:
@echo "building $(CURNAME)"
native: $(BUILD_EXE)
@echo $(BASENAMES)

16
laos/src/user/echo.c
View File

@@ -1,16 +0,0 @@
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
int main(int argc, char *argv[]) {
for (int i = 1; i < argc; i++) {
write(STDOUT_FILENO, argv[i], strlen(argv[i]));
if(i + 1 < argc){
write(STDOUT_FILENO, " ", 1);
} else {
write(STDOUT_FILENO, "\n", 1);
}
}
exit(0);
}

0
laos/src/user/shell.c
View File

47
laos/src/user/xargs.c
View File

@@ -1,47 +0,0 @@
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/wait.h>
void remove_tail_newline(char *str, int len) {
if (len == 0) {
return;
}
if (str[len - 1] == '\n') {
str[len - 1] = '\0';
}
}
int main(int argc, char *argv[]) {
if (argc < 1) {
exit(EXIT_FAILURE);
}
char **args = malloc(argc * sizeof(char *));
memcpy(args, &argv[1], (argc - 1) * sizeof(char *));
argc -= 1;
const char *filename = argv[1];
char input[128];
read(STDIN_FILENO, input, 128);
remove_tail_newline(input, strlen(input));
char *tok = strtok(input, " ");
while (tok) {
args = realloc(args, (argc + 1) * sizeof(char *));
args[argc] = tok;
argc += 1;
tok = strtok(NULL, " ");
}
if (fork() == 0) {
execvp(filename, args);
exit(EXIT_FAILURE);
}
wait(NULL);
free(args);
return 0;
}

21
laos/src/util/Makefile
View File

@@ -1,21 +0,0 @@
CURNAME := util
BUILD_DIR := $(TOP_BUILD_DIR)/$(CURNAME)
CSRC := $(wildcard *.c)
OBJS := $(patsubst %.c,%.o,$(CSRC))
BUILD_OBJS := $(addprefix $(BUILD_DIR)/,$(OBJS))
.PHONY: build all message
all: message build
$(BUILD_DIR):
@mkdir -p $(BUILD_DIR)
$(BUILD_OBJS): $(BUILD_DIR)/%.o:%.c $(BUILD_DIR)
@$(CC) -c -o $@ $< $(CPPFLAGS) $(CFLAGS)
build: $(BUILD_OBJS)
message:
@echo "building $(CURNAME)"

71
laos/src/util/filepath.c
View File

@@ -1,71 +0,0 @@
#include "defs.h"
//
// bnm should be large enough to hold basename
//
char *basename(char *bnm, const char *path) {
const char *p = path;
const char *last_slash = NULL;
while (*p) {
if (*p == '/' || *p == '\\') {
last_slash = p;
}
p++;
}
char *q = bnm;
p = last_slash + 1;
while (*p) {
*q++ = *p++;
}
return bnm;
}
//
// noext should be large enough to hold no-ext name
//
char *rmext(char *noext, const char *fname) {
const char *p = fname;
const char *last_dot = NULL;
while (*p) {
if (*p == '.') {
last_dot = p;
}
p++;
}
char *q = noext;
p = fname;
while (p != last_dot) {
*q++ = *p++;
}
return noext;
}
//
// bnm should be large enough to hold bearname name
//
char *bearname(char *bnm, const char *fname) {
const char *p = fname;
const char *last_slash = NULL;
const char *last_dot = NULL;
while (*p) {
if (*p == '/' || *p == '\\') {
last_slash = p;
} else if (*p == '.') {
last_dot = p;
}
p++;
}
char *q = bnm;
p = last_slash + 1;
while (p != last_dot) {
*q++ = *p++;
}
return bnm;
}

93
laos/src/util/string.c
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@@ -1,93 +0,0 @@
#include "string.h"
#include "latype.h"
// mem ops could be more better
// use loop unrolling
void *memset(void *dst, int c, uint n) {
char *cdst = (char *) dst;
for (uint i = 0; i < n; ++i) {
cdst[i] = c;
}
return dst;
}
int memcmp(const void *m1, const void *m2, uint n) {
const uchar *s1, *s2;
s1 = m1;
s2 = m2;
while (n --> 0) {
if(*s1 != *s2)
return *s1 - *s2;
s1++;
s2++;
}
return 0;
}
void *memmove(void *dst, const void *src, uint n) {
const char *s;
char *d;
if(n == 0)
return dst;
s = src;
d = dst;
if(s < d && s + n > d){
s += n;
d += n;
while(n-- > 0)
*--d = *--s;
} else
while(n-- > 0)
*d++ = *s++;
return dst;
}
void *memcpy(void *dst, const void *src, uint n) {
return memmove(dst, src, n);
}
int strncmp(const char *p, const char *q, uint n) {
while(n > 0 && *p && *p == *q)
n--, p++, q++;
if(n == 0)
return 0;
return (uchar)*p - (uchar)*q;
}
char *strncpy(char *s, const char *t, int n) {
char *os;
os = s;
while(n-- > 0 && (*s++ = *t++) != 0)
;
while(n-- > 0)
*s++ = 0;
return os;
}
char *strcpy_s(char *s, const char *t, int n) {
char *os;
os = s;
if(n <= 0)
return os;
while(--n > 0 && (*s++ = *t++) != 0)
;
*s = 0;
return os;
}
int strlen(const char *s) {
int n;
for(n = 0; s[n]; n++)
;
return n;
}

9
lasim/include/la32r.hh
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@@ -1,9 +0,0 @@
#pragma once
#include <sysbus.hh>
class LA32R {
public:
LA32R(SystemBus *bus);
void Step(unsigned in);
};

1009
lasim/la32r.cc
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File diff suppressed because it is too large Load Diff

38
lasim/main.cc
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@@ -1,38 +0,0 @@
#include <iostream>
#include <sysbus.hh>
#include <memory.hh>
#include <serial.hh>
#include <la32r.hh>
#include <common.h>
#include <devaddr.h>
int main(int argc, char *argv[]) {
// if (argc < 2) {
// std::cout << "Usage: sim <bin>";
// return 0;
// }
SystemBus bus;
Memory ram(2 * 1024 * 1024);
Memory stk(256 * 1024);
Memory flash(1024 * 1024);
flash.load("../laos/build/neula-os");
ram.load(&flash, 0x0, flash.size());
bus.regdev(&ram, RAM_ADDR);
bus.regdev(&stk, STK_ADDR);
Serial bios(1);
bus.regdev(&bios, SERIAL_PORT);
auto cpu = new LA32R(&bus);
while (true) {
cpu->Step(1);
}
delete cpu;
return 0;
}

43
lavsim/main.cc
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@@ -1,43 +0,0 @@
// DESCRIPTION: Verilator: Verilog example module
//
// This file ONLY is placed under the Creative Commons Public Domain, for
// any use, without warranty, 2017 by Wilson Snyder.
// SPDX-License-Identifier: CC0-1.0
//======================================================================
// Include common routines
#include <verilated.h>
// Include model header, generated from Verilating "top.v"
#include "Vtop.h"
int main(int argc, char** argv) {
// See a similar example walkthrough in the verilator manpage.
// This is intended to be a minimal example. Before copying this to start a
// real project, it is better to start with a more complete example,
// e.g. examples/c_tracing.
// Pass arguments so Verilated code can see them, e.g. $value$plusargs
// This needs to be called before you create any model
Verilated::commandArgs(argc, argv);
// Construct the Verilated model, from Vtop.h generated from Verilating "top.v"
Vtop* top = new Vtop();
// Simulate until $finish
while (!Verilated::gotFinish()) {
// Evaluate model
top->eval();
}
// Final model cleanup
top->final();
// Destroy model
delete top;
// Return good completion status
return 0;
}