🆕 新增了使用8259A芯片的中断响应程序

2025-06-18 12:16:31 +00:00 · 2022-01-29 12:52:25 +08:00
parent 49eaf6ce95
commit eff673edcb
8 changed files with 302 additions and 7 deletions
--- a/kernel/exception/irq.c
+++ b/kernel/exception/irq.c
@ -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);
+}