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🆕 新增了使用8259A芯片的中断响应程序

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This commit is contained in:
fslongjin 2022-01-29 12:52:25 +08:00
parent 49eaf6ce95
commit eff673edcb
8 changed files with 302 additions and 7 deletions
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12
kernel/Makefile
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@ -10,8 +10,8 @@ all: kernel
objcopy -I elf64-x86-64 -S -R ".eh_frame" -R ".comment" -O binary kernel ../bin/kernel/kernel.bin
kernel: head.o entry.o main.o printk.o trap.o mm.o
ld -b elf64-x86-64 -z muldefs -o kernel head.o exception/entry.o main.o common/printk.o exception/trap.o mm/mm.o -T link.lds
kernel: head.o entry.o main.o printk.o trap.o mm.o irq.o 8259A.o
ld -b elf64-x86-64 -z muldefs -o kernel head.o exception/entry.o main.o common/printk.o exception/trap.o exception/irq.o exception/8259A.o mm/mm.o -T link.lds
head.o: head.S
gcc -E head.S > head.s # 预处理
@ -21,6 +21,8 @@ entry.o: exception/entry.S
gcc -E exception/entry.S > exception/entry.s
as --64 -o exception/entry.o exception/entry.s
main.o: main.c
# -fno-builtin: 不使用C语言内建函数
# The -m64 option sets int to 32bits and long and pointer to 64 bits and generates code for AMD’s x86-64 architecture.
@ -33,6 +35,12 @@ printk.o: common/printk.c
trap.o: exception/trap.c
gcc -mcmodel=large -fno-builtin -m64 -c exception/trap.c -o exception/trap.o
irq.o: exception/irq.c
gcc -mcmodel=large -fno-builtin -m64 -c exception/irq.c -o exception/irq.o
8259A.o: exception/8259A.c
gcc -mcmodel=large -fno-builtin -m64 -c exception/8259A.c -o exception/8259A.o
mm.o: mm/mm.c
gcc -mcmodel=large -fno-builtin -m64 -c mm/mm.c -o mm/mm.o

15
kernel/common/asm.h
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@ -9,4 +9,17 @@
name:
#endif
#endif
// 符号名
#define SYMBOL_NAME(X) X
// 符号名字符串
#define SYMBOL_NAME_STR(X) #X
// 符号名label
#define SYMBOL_NAME_LABEL(X) X##:
#define L1_CACHE_BYTES 32
#define asmlinkage __attribute__((regparm(0)))
#define ____cacheline_aligned __attribute__((__aligned__(L1_CACHE_BYTES)))

50
kernel/common/glib.h
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@ -18,11 +18,11 @@
//内存屏障
#define io_mfence() __asm__ __volatile__("mfence\n\t" :: \
: "memory") // 在mfence指令前的读写操作当必须在mfence指令后的读写操作前完成。
: "memory") // 在mfence指令前的读写操作必须在mfence指令后的读写操作前完成。
#define io_sfence() __asm__ __volatile__("sfence\n\t" :: \
: "memory") // 在sfence指令前的写操作当必须在sfence指令后的写操作前完成
: "memory") // 在sfence指令前的写操作必须在sfence指令后的写操作前完成
#define io_lfence() __asm__ __volatile__("lfence\n\t" :: \
: "memory") // 在lfence指令前的读操作当必须在lfence指令后的读操作前完成。
: "memory") // 在lfence指令前的读操作必须在lfence指令后的读操作前完成。
// 定义类型的缩写
typedef unsigned long ul;
@ -140,4 +140,48 @@ void *memset_c(void *dst, unsigned char c, ul n)
for (int i = 0; i < n; ++i)
s[i] = c;
return dst;
}
// 从io口读入8个bit
unsigned char io_in8(unsigned short port)
{
unsigned char ret = 0;
__asm__ __volatile__( "inb %%dx, %0 \n\t"
"mfence \n\t"
:"=a"(ret)
:"d"(port)
:"memory");
return ret;
}
// 从io口读入32个bit
unsigned int io_in32(unsigned short port)
{
unsigned int ret = 0;
__asm__ __volatile__( "inl %%dx, %0 \n\t"
"mfence \n\t"
:"=a"(ret)
:"d"(port)
:"memory");
return ret;
}
// 输出8个bit到输出端口
void io_out8(unsigned short port,unsigned char value)
{
__asm__ __volatile__( "outb %0, %%dx \n\t"
"mfence \n\t"
:
:"a"(value),"d"(port)
:"memory");
}
// 输出32个bit到输出端口
void io_out32(unsigned short port,unsigned int value)
{
__asm__ __volatile__( "outl %0, %%dx \n\t"
"mfence \n\t"
:
:"a"(value),"d"(port)
:"memory");
}

35
kernel/exception/8259A.c Normal file
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@ -0,0 +1,35 @@
#include "8259A.h"
#include "irq.c"
#include "../common/printk.h"
#include "../common/kprint.h"
void init_8259A()
{
// 初始化中断门， 中断使用第二个ist
for(int i=32;i<=55;++i)
set_intr_gate(i, 2, interrupt[i-32]);
kinfo("Initializing 8259A...");
// 初始化主芯片
io_out8(0x20, 0x11); // 初始化主芯片的icw1
io_out8(0x21, 0x20); // 设置主芯片的中断向量号为0x20(0x20-0x27)
io_out8(0x21, 0x04); // 设置int2端口级联从芯片
io_out8(0x21, 0x01); // 设置为AEOI模式、FNM、无缓冲
// 初始化从芯片
io_out8(0xa0, 0x11);
io_out8(0xa1, 0x28); // 设置从芯片的中断向量号为0x28(0x28-0x2f)
io_out8(0xa1, 0x02); // 设置从芯片连接到主芯片的int2
io_out8(0xa1, 0x01);
// 设置ocw1, 允许所有中断请求
io_out8(0x21, 0x00);
io_out8(0xa1, 0x00);
sti();
kinfo("IRQ circuit 8259A initialized.");
}

25
kernel/exception/8259A.h Normal file
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@ -0,0 +1,25 @@
/**
* @file 8259A.h
* @author longjin
* @brief 8259A中断芯片
* @version 0.1
* @date 2022-01-29
*
* @copyright Copyright (c) 2022
*
*/
#pragma once
#include "../common/glib.h"
#define PIC_EOI 0x20
#define PIC_master 0x20 /* IO base address for master PIC */
#define PIC2_slave 0xA0 /* IO base address for slave PIC */
// 初始化8259A芯片的中断服务
void init_8259A();

134
kernel/exception/irq.c Normal file
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@ -0,0 +1,134 @@
#include "irq.h"
#include "8259A.h"
#include "../common/asm.h"
#include"../common/printk.h"
#include "gate.h"
// 保存函数调用现场的寄存器
#define SAVE_ALL_REGS \
"cld; \n\t" \
"pushq %rax; \n\t" \
"pushq %rax; \n\t" \
"movq %es, %rax; \n\t" \
"pushq %rax; \n\t" \
"movq %ds, %rax; \n\t" \
"pushq %rax; \n\t" \
"xorq %rax, %rax;\n\t" \
"pushq %rbp; \n\t" \
"pushq %rdi; \n\t" \
"pushq %rsi; \n\t" \
"pushq %rdx; \n\t" \
"pushq %rcx; \n\t" \
"pushq %rbx; \n\t" \
"pushq %r8 ; \n\t" \
"pushq %r9 ; \n\t" \
"pushq %r10; \n\t" \
"pushq %r11; \n\t" \
"pushq %r12; \n\t" \
"pushq %r13; \n\t" \
"pushq %r14; \n\t" \
"pushq %r15; \n\t" \
"movq $0x10, %rdx;\n\t" \
"movq %rdx, %ds; \n\t" \
"movq %rdx, %es; \n\t"
// 定义IRQ处理函数的名字格式：IRQ+中断号+interrupt
#define IRQ_NAME2(name1) name1##interrupt(void)
#define IRQ_NAME(number) IRQ_NAME2(IRQ##number)
// 构造中断entry
// 为了复用返回函数的代码，需要压入一个错误码0
#define Build_IRQ(number) \
void IRQ_NAME(number); \
__asm__ (SYMBOL_NAME_STR(IRQ)#number"interrupt: \n\t" \
"pushq $0x00 \n\t" \
SAVE_ALL_REGS \
"movq %rsp, %rdi\n\t" \
"leaq ret_from_intr(%rip), %rax\n\t" \
"pushq %rax \n\t" \
"movq $"#number", %rsi \n\t" \
"jmp do_IRQ\n\t");
// 构造中断入口
Build_IRQ(0x20)
Build_IRQ(0x21)
Build_IRQ(0x22)
Build_IRQ(0x23)
Build_IRQ(0x24)
Build_IRQ(0x25)
Build_IRQ(0x26)
Build_IRQ(0x27)
Build_IRQ(0x28)
Build_IRQ(0x29)
Build_IRQ(0x2a)
Build_IRQ(0x2b)
Build_IRQ(0x2c)
Build_IRQ(0x2d)
Build_IRQ(0x2e)
Build_IRQ(0x2f)
Build_IRQ(0x30)
Build_IRQ(0x31)
Build_IRQ(0x32)
Build_IRQ(0x33)
Build_IRQ(0x34)
Build_IRQ(0x35)
Build_IRQ(0x36)
Build_IRQ(0x37)
// 初始化中断数组
void (*interrupt[24])(void)=
{
IRQ0x20interrupt,
IRQ0x21interrupt,
IRQ0x22interrupt,
IRQ0x23interrupt,
IRQ0x24interrupt,
IRQ0x25interrupt,
IRQ0x26interrupt,
IRQ0x27interrupt,
IRQ0x28interrupt,
IRQ0x29interrupt,
IRQ0x2ainterrupt,
IRQ0x2binterrupt,
IRQ0x2cinterrupt,
IRQ0x2dinterrupt,
IRQ0x2einterrupt,
IRQ0x2finterrupt,
IRQ0x30interrupt,
IRQ0x31interrupt,
IRQ0x32interrupt,
IRQ0x33interrupt,
IRQ0x34interrupt,
IRQ0x35interrupt,
IRQ0x36interrupt,
IRQ0x37interrupt,
};
/**
* @brief 初始化中断模块
*/
void init_irq()
{
init_8259A();
}
/**
* @brief 中断服务程序
*
* @param rsp 中断栈指针
* @param number 中断号
*/
void do_IRQ(ul rsp, ul number)
{
if(number!=0x20)
printk_color(ORANGE, BLACK, "Received irq:%#018x\n", number);
// 向主芯片发送中断结束信号
io_out8(PIC_master, PIC_EOI);
}

29
kernel/exception/irq.h Normal file
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@ -0,0 +1,29 @@
/**
* @file irq.h
* @author longjin
* @brief 中断处理程序
* @version 0.1
* @date 2022-01-28
*
* @copyright Copyright (c) 2022
*
*/
#pragma once
#include "../common/glib.h"
/**
* @brief 初始化中断模块
*/
void init_irq();
/**
* @brief 中断服务程序
*
* @param rsp 中断栈指针
* @param number 中断号
*/
void do_IRQ(ul rsp, ul number);

9
kernel/main.c
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@ -6,6 +6,7 @@
#include "common/printk.h"
#include "exception/gate.h"
#include "exception/trap.h"
#include "exception/irq.h"
#include "mm/mm.h"
#include "common/kprint.h"
@ -69,6 +70,7 @@ void test_mm()
//printk("bmp[0]:%#018x\tbmp[1]%#018lx\n", *memory_management_struct.bmp, *(memory_management_struct.bmp + 1));
kinfo("Try to allocate 64 memory pages.");
struct Page *page = alloc_pages(ZONE_NORMAL, 64, PAGE_PGT_MAPPED | PAGE_ACTIVE | PAGE_KERNEL);
/*
for (int i = 0; i <= 65; ++i)
{
printk("page%d\tattr:%#018lx\tphys_addr:%#018lx\t", i, page->attr, page->addr_phys);
@ -76,6 +78,7 @@ void test_mm()
if (((i + 1) % 2) == 0)
printk("\n");
}
*/
//printk("bmp[0]:%#018x\tbmp[1]%#018lx\n", *(memory_management_struct.bmp), *(memory_management_struct.bmp + 1));
}
@ -97,8 +100,12 @@ void init()
//asm volatile(" fxsave %0 " ::"m"(fxsave_region));
// 初始化内存管理单元
mm_init();
// 初始化中断模块
init_irq();
}
//操作系统内核从这里开始执行
void Start_Kernel(void)