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https://github.com/DragonOS-Community/DragonOS.git
synced 2025-06-11 00:46:49 +00:00
🆕 新增了使用8259A芯片的中断响应程序
This commit is contained in:
parent
49eaf6ce95
commit
eff673edcb
@ -10,8 +10,8 @@ all: kernel
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objcopy -I elf64-x86-64 -S -R ".eh_frame" -R ".comment" -O binary kernel ../bin/kernel/kernel.bin
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kernel: head.o entry.o main.o printk.o trap.o mm.o
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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
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kernel: head.o entry.o main.o printk.o trap.o mm.o irq.o 8259A.o
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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
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head.o: head.S
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gcc -E head.S > head.s # 预处理
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@ -21,6 +21,8 @@ entry.o: exception/entry.S
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gcc -E exception/entry.S > exception/entry.s
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as --64 -o exception/entry.o exception/entry.s
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main.o: main.c
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# -fno-builtin: 不使用C语言内建函数
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# The -m64 option sets int to 32bits and long and pointer to 64 bits and generates code for AMD’s x86-64 architecture.
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@ -33,6 +35,12 @@ printk.o: common/printk.c
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trap.o: exception/trap.c
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gcc -mcmodel=large -fno-builtin -m64 -c exception/trap.c -o exception/trap.o
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irq.o: exception/irq.c
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gcc -mcmodel=large -fno-builtin -m64 -c exception/irq.c -o exception/irq.o
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8259A.o: exception/8259A.c
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gcc -mcmodel=large -fno-builtin -m64 -c exception/8259A.c -o exception/8259A.o
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mm.o: mm/mm.c
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gcc -mcmodel=large -fno-builtin -m64 -c mm/mm.c -o mm/mm.o
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@ -9,4 +9,17 @@
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name:
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#endif
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#endif
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// 符号名
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#define SYMBOL_NAME(X) X
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// 符号名字符串
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#define SYMBOL_NAME_STR(X) #X
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// 符号名label
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#define SYMBOL_NAME_LABEL(X) X##:
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#define L1_CACHE_BYTES 32
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#define asmlinkage __attribute__((regparm(0)))
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#define ____cacheline_aligned __attribute__((__aligned__(L1_CACHE_BYTES)))
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@ -18,11 +18,11 @@
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//内存屏障
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#define io_mfence() __asm__ __volatile__("mfence\n\t" :: \
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: "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。
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: "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。
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#define io_sfence() __asm__ __volatile__("sfence\n\t" :: \
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: "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
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: "memory") // 在sfence指令前的写操作必须在sfence指令后的写操作前完成
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#define io_lfence() __asm__ __volatile__("lfence\n\t" :: \
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: "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。
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: "memory") // 在lfence指令前的读操作必须在lfence指令后的读操作前完成。
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// 定义类型的缩写
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typedef unsigned long ul;
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@ -140,4 +140,48 @@ void *memset_c(void *dst, unsigned char c, ul n)
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for (int i = 0; i < n; ++i)
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s[i] = c;
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return dst;
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}
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// 从io口读入8个bit
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unsigned char io_in8(unsigned short port)
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{
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unsigned char ret = 0;
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__asm__ __volatile__( "inb %%dx, %0 \n\t"
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"mfence \n\t"
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:"=a"(ret)
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:"d"(port)
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:"memory");
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return ret;
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}
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// 从io口读入32个bit
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unsigned int io_in32(unsigned short port)
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{
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unsigned int ret = 0;
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__asm__ __volatile__( "inl %%dx, %0 \n\t"
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"mfence \n\t"
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:"=a"(ret)
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:"d"(port)
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:"memory");
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return ret;
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}
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// 输出8个bit到输出端口
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void io_out8(unsigned short port,unsigned char value)
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{
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__asm__ __volatile__( "outb %0, %%dx \n\t"
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"mfence \n\t"
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:
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:"a"(value),"d"(port)
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:"memory");
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}
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// 输出32个bit到输出端口
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void io_out32(unsigned short port,unsigned int value)
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{
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__asm__ __volatile__( "outl %0, %%dx \n\t"
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"mfence \n\t"
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:
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:"a"(value),"d"(port)
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:"memory");
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}
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35
kernel/exception/8259A.c
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35
kernel/exception/8259A.c
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@ -0,0 +1,35 @@
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#include "8259A.h"
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#include "irq.c"
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#include "../common/printk.h"
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#include "../common/kprint.h"
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void init_8259A()
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{
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// 初始化中断门, 中断使用第二个ist
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for(int i=32;i<=55;++i)
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set_intr_gate(i, 2, interrupt[i-32]);
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kinfo("Initializing 8259A...");
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// 初始化主芯片
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io_out8(0x20, 0x11); // 初始化主芯片的icw1
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io_out8(0x21, 0x20); // 设置主芯片的中断向量号为0x20(0x20-0x27)
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io_out8(0x21, 0x04); // 设置int2端口级联从芯片
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io_out8(0x21, 0x01); // 设置为AEOI模式、FNM、无缓冲
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// 初始化从芯片
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io_out8(0xa0, 0x11);
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io_out8(0xa1, 0x28); // 设置从芯片的中断向量号为0x28(0x28-0x2f)
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io_out8(0xa1, 0x02); // 设置从芯片连接到主芯片的int2
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io_out8(0xa1, 0x01);
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// 设置ocw1, 允许所有中断请求
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io_out8(0x21, 0x00);
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io_out8(0xa1, 0x00);
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sti();
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kinfo("IRQ circuit 8259A initialized.");
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}
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25
kernel/exception/8259A.h
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25
kernel/exception/8259A.h
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@ -0,0 +1,25 @@
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/**
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* @file 8259A.h
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* @author longjin
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* @brief 8259A中断芯片
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* @version 0.1
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* @date 2022-01-29
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*
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* @copyright Copyright (c) 2022
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*
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*/
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#pragma once
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#include "../common/glib.h"
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#define PIC_EOI 0x20
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#define PIC_master 0x20 /* IO base address for master PIC */
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#define PIC2_slave 0xA0 /* IO base address for slave PIC */
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// 初始化8259A芯片的中断服务
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void init_8259A();
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134
kernel/exception/irq.c
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134
kernel/exception/irq.c
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@ -0,0 +1,134 @@
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#include "irq.h"
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#include "8259A.h"
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#include "../common/asm.h"
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#include"../common/printk.h"
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#include "gate.h"
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// 保存函数调用现场的寄存器
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#define SAVE_ALL_REGS \
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"cld; \n\t" \
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"pushq %rax; \n\t" \
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"pushq %rax; \n\t" \
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"movq %es, %rax; \n\t" \
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"pushq %rax; \n\t" \
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"movq %ds, %rax; \n\t" \
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"pushq %rax; \n\t" \
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"xorq %rax, %rax;\n\t" \
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"pushq %rbp; \n\t" \
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"pushq %rdi; \n\t" \
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"pushq %rsi; \n\t" \
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"pushq %rdx; \n\t" \
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"pushq %rcx; \n\t" \
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"pushq %rbx; \n\t" \
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"pushq %r8 ; \n\t" \
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"pushq %r9 ; \n\t" \
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"pushq %r10; \n\t" \
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"pushq %r11; \n\t" \
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"pushq %r12; \n\t" \
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"pushq %r13; \n\t" \
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"pushq %r14; \n\t" \
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"pushq %r15; \n\t" \
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"movq $0x10, %rdx;\n\t" \
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"movq %rdx, %ds; \n\t" \
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"movq %rdx, %es; \n\t"
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// 定义IRQ处理函数的名字格式:IRQ+中断号+interrupt
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#define IRQ_NAME2(name1) name1##interrupt(void)
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#define IRQ_NAME(number) IRQ_NAME2(IRQ##number)
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// 构造中断entry
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// 为了复用返回函数的代码,需要压入一个错误码0
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#define Build_IRQ(number) \
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void IRQ_NAME(number); \
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__asm__ (SYMBOL_NAME_STR(IRQ)#number"interrupt: \n\t" \
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"pushq $0x00 \n\t" \
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SAVE_ALL_REGS \
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"movq %rsp, %rdi\n\t" \
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"leaq ret_from_intr(%rip), %rax\n\t" \
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"pushq %rax \n\t" \
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"movq $"#number", %rsi \n\t" \
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"jmp do_IRQ\n\t");
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// 构造中断入口
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Build_IRQ(0x20)
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Build_IRQ(0x21)
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Build_IRQ(0x22)
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Build_IRQ(0x23)
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Build_IRQ(0x24)
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Build_IRQ(0x25)
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Build_IRQ(0x26)
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Build_IRQ(0x27)
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Build_IRQ(0x28)
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Build_IRQ(0x29)
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Build_IRQ(0x2a)
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Build_IRQ(0x2b)
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Build_IRQ(0x2c)
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Build_IRQ(0x2d)
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Build_IRQ(0x2e)
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Build_IRQ(0x2f)
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Build_IRQ(0x30)
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Build_IRQ(0x31)
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Build_IRQ(0x32)
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Build_IRQ(0x33)
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Build_IRQ(0x34)
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Build_IRQ(0x35)
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Build_IRQ(0x36)
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Build_IRQ(0x37)
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// 初始化中断数组
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void (*interrupt[24])(void)=
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{
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IRQ0x20interrupt,
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IRQ0x21interrupt,
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IRQ0x22interrupt,
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IRQ0x23interrupt,
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IRQ0x24interrupt,
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IRQ0x25interrupt,
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IRQ0x26interrupt,
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IRQ0x27interrupt,
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IRQ0x28interrupt,
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IRQ0x29interrupt,
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IRQ0x2ainterrupt,
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IRQ0x2binterrupt,
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IRQ0x2cinterrupt,
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IRQ0x2dinterrupt,
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IRQ0x2einterrupt,
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IRQ0x2finterrupt,
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IRQ0x30interrupt,
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IRQ0x31interrupt,
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IRQ0x32interrupt,
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IRQ0x33interrupt,
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IRQ0x34interrupt,
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IRQ0x35interrupt,
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IRQ0x36interrupt,
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IRQ0x37interrupt,
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};
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/**
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* @brief 初始化中断模块
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*/
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void init_irq()
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{
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init_8259A();
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}
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/**
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* @brief 中断服务程序
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*
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* @param rsp 中断栈指针
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* @param number 中断号
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*/
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void do_IRQ(ul rsp, ul number)
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{
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if(number!=0x20)
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printk_color(ORANGE, BLACK, "Received irq:%#018x\n", number);
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// 向主芯片发送中断结束信号
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io_out8(PIC_master, PIC_EOI);
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}
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29
kernel/exception/irq.h
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29
kernel/exception/irq.h
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@ -0,0 +1,29 @@
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/**
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* @file irq.h
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* @author longjin
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* @brief 中断处理程序
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* @version 0.1
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* @date 2022-01-28
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*
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* @copyright Copyright (c) 2022
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*
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*/
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#pragma once
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#include "../common/glib.h"
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/**
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* @brief 初始化中断模块
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*/
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void init_irq();
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/**
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* @brief 中断服务程序
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*
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* @param rsp 中断栈指针
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* @param number 中断号
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*/
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void do_IRQ(ul rsp, ul number);
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#include "common/printk.h"
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#include "exception/gate.h"
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#include "exception/trap.h"
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#include "exception/irq.h"
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#include "mm/mm.h"
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#include "common/kprint.h"
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@ -69,6 +70,7 @@ void test_mm()
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//printk("bmp[0]:%#018x\tbmp[1]%#018lx\n", *memory_management_struct.bmp, *(memory_management_struct.bmp + 1));
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kinfo("Try to allocate 64 memory pages.");
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struct Page *page = alloc_pages(ZONE_NORMAL, 64, PAGE_PGT_MAPPED | PAGE_ACTIVE | PAGE_KERNEL);
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/*
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for (int i = 0; i <= 65; ++i)
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{
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printk("page%d\tattr:%#018lx\tphys_addr:%#018lx\t", i, page->attr, page->addr_phys);
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@ -76,6 +78,7 @@ void test_mm()
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if (((i + 1) % 2) == 0)
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printk("\n");
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}
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*/
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//printk("bmp[0]:%#018x\tbmp[1]%#018lx\n", *(memory_management_struct.bmp), *(memory_management_struct.bmp + 1));
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}
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@ -97,8 +100,12 @@ void init()
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//asm volatile(" fxsave %0 " ::"m"(fxsave_region));
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// 初始化内存管理单元
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mm_init();
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// 初始化中断模块
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init_irq();
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}
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//操作系统内核从这里开始执行
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void Start_Kernel(void)
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