diff options
Diffstat (limited to 'src/int')
| -rw-r--r-- | src/int/8042.c | 16 | ||||
| -rw-r--r-- | src/int/8042.h | 64 | ||||
| -rw-r--r-- | src/int/int.S | 0 | ||||
| -rw-r--r-- | src/int/pic.c | 115 | ||||
| -rw-r--r-- | src/int/pic.h | 23 |
5 files changed, 218 insertions, 0 deletions
diff --git a/src/int/8042.c b/src/int/8042.c new file mode 100644 index 0000000..f0a987f --- /dev/null +++ b/src/int/8042.c @@ -0,0 +1,16 @@ +#include "8042.h" +#include "utils/framebuffer.h" +#include "utils/asm.h" + +DEFINE_AZERTY; + +void _8042_keypress(){ + u8 data; + do { + inb(0x64,data); + } + while((data&0x01) == 0); + inb(0x60,data); + if(data<0x80) + putchar(AZERTY[data]); +} diff --git a/src/int/8042.h b/src/int/8042.h new file mode 100644 index 0000000..e35e5a0 --- /dev/null +++ b/src/int/8042.h @@ -0,0 +1,64 @@ +#ifndef _8042_H +#define _8042_H + +#include "utils/types.h" + +void _8042_keypress(); + +#define DEFINE_AZERTY char AZERTY[]={\ + '\0',\ + '\0',\ + '&',\ + '\0',\ + '"',\ + '\'',\ + '(',\ + '-',\ + '\0',\ + '_',/* 10 */\ + '\0',\ + '\0',\ + ')',\ + '=',\ + '\0',\ + '\t',\ + 'a',\ + 'z',\ + 'e',\ + 'r',\ + 't',\ + 'y',\ + 'u',\ + 'i',\ + 'o',\ + 'p',\ + '^',\ + '$',\ + '\0',\ + '\0',\ + 'q',/* 0x1E (30) */\ + 's',\ + 'd',\ + 'f',\ + 'g',\ + 'h',\ + 'j',\ + 'k',\ + 'l',\ + 'm',\ + '\0',\ + '\0',\ + '\0',\ + '*',\ + 'w',\ + 'x',\ + 'c',\ + 'v',\ + 'b',/* 0x30 (48) */\ + 'n',\ + ',',\ + ';',\ + ':',\ +} + +#endif
\ No newline at end of file diff --git a/src/int/int.S b/src/int/int.S new file mode 100644 index 0000000..e69de29 --- /dev/null +++ b/src/int/int.S diff --git a/src/int/pic.c b/src/int/pic.c new file mode 100644 index 0000000..472e50c --- /dev/null +++ b/src/int/pic.c @@ -0,0 +1,115 @@ +#include "pic.h" +#include "utils/asm.h" +#include "utils/mem.h" +#include "utils/syscall.h" + +struct IDT_REGISTER IDTR={ + 200*8, + 0x0 +}; + +/// Bridge between IDT and functions call +asm ( +".macro SAVE_REGS \n\t" + "pushal \n\t" + "push %ds \n\t" + "push %es \n\t" + "push %fs \n\t" + "push %gs \n\t" + "push %ebx \n\t" + "mov $0x10,%bx \n\t" + "mov %bx,%ds \n\t" + "pop %ebx \n\t" +".endm \n\t" +".macro RESTORE_REGS \n\t" + "pop %gs \n\t" + "pop %fs \n\t" + "pop %es \n\t" + "pop %ds \n\t" + "popal \n\t" +".endm \n\t" +"PIC_IRQ_DEFAULT: \n\t" + "SAVE_REGS \n\t" + "movb $0x20, %al \n\t" + "outb %al, $0x20 \n\t" + "RESTORE_REGS \n\t" + "iret \n\t" +"PIC_IRQ_PRINT: \n\t" + "SAVE_REGS \n\t" + "call _8042_keypress \n\t" + "movb $0x20, %al \n\t" + "outb %al, $0x20 \n\t" + "RESTORE_REGS \n\t" + "iret \n\t" +"PIC_IRQ_CLOCK: \n\t" + "SAVE_REGS \n\t" + "call clock \n\t" + "movb $0x20, %al \n\t" + "outb %al, $0x20 \n\t" + "RESTORE_REGS \n\t" + "iret \n\t" +"PIC_IRQ_SYSCALL: \n\t" + "SAVE_REGS \n\t" + "call syscall \n\t" + "movb $0x20, %al \n\t" + "outb %al, $0x20 \n\t" + "RESTORE_REGS \n\t" + "iret \n\t" +"INT_PAGE_FAULT: \n\t" + "SAVE_REGS \n\t" + "call page_fault \n\t" + "hlt \n\t" + "movb $0x20, %al \n\t" + "outb %al, $0x20 \n\t" + "RESTORE_REGS \n\t" + "iret \n\t" +); + +extern u32 PIC_IRQ_DEFAULT,PIC_IRQ_PRINT,PIC_IRQ_CLOCK, PIC_IRQ_SYSCALL,INT_PAGE_FAULT; + +void pic_enable_interrupt(){ + // Map first default 32 entries + for(int i=0;i<200;i++){ + pic_add_idt_entry((IDT_ENTRY){0x08,(u32)&PIC_IRQ_DEFAULT,IDT_INT_GATE},i); + if(i==14) + pic_add_idt_entry((IDT_ENTRY){0x08,(u32)&INT_PAGE_FAULT,IDT_INT_GATE},i); + if(i==32) + pic_add_idt_entry((IDT_ENTRY){0x08,(u32)&PIC_IRQ_CLOCK,IDT_INT_GATE},i); + if(i==33) + pic_add_idt_entry((IDT_ENTRY){0x08,(u32)&PIC_IRQ_PRINT,IDT_INT_GATE},i); + if(i==48) + pic_add_idt_entry((IDT_ENTRY){0x08,(u32)&PIC_IRQ_SYSCALL,IDT_TRAP_GATE},i); + } + + // Now configure 8952A + + // ICW1: Initialisation + outbj(0x20,0x11); // Master + outbj(0xA0,0x11); // Slave + + // ICW2: Map IRQ index to entry into the IDT + outbj(0x21,0x20); // Start interrupt at offset 0x20 in IDT (index 32) + outbj(0xA1,0x70); // Start interrupt at offset 0x50 in IDT (index 80) + + // ICW3: Indicate the connection between master and slave + outbj(0x21,0x02); // Slave connected to pin 2 + outbj(0xA1,0x01); // Indicate pin id to the slave (2-1) + + // ICW4: Operating mode + outbj(0x21,0x01); // Default operating mode + outbj(0xA1,0x01); // Default operating mode + + // OCW: Masking + outbj(0x21,0b11111100); + + + asm("lidtl (IDTR)"); + asm("sti"); +} + +void pic_add_idt_entry(IDT_ENTRY entry, int id){ + int descriptor[2]; + descriptor[0]=entry.offset & 0xFFFF | entry.segment << 16; + descriptor[1]=entry.type & 0xFFFF | entry.offset & 0xFFFF0000; + memcpy((void*)descriptor, (void *)(IDTR.base+(id*8)),8); +} diff --git a/src/int/pic.h b/src/int/pic.h new file mode 100644 index 0000000..db1ccec --- /dev/null +++ b/src/int/pic.h @@ -0,0 +1,23 @@ +#ifndef PIC_H +#define PIC_H + +#include "utils/types.h" + +#define IDT_INT_GATE 0x8E00 +#define IDT_TRAP_GATE 0xEF00 + +typedef struct IDT_ENTRY { + u16 segment; + u32 offset; + u16 type; +} IDT_ENTRY; + +struct IDT_REGISTER { + u16 limit; + u32 base; +} __attribute__((packed)); + +void pic_enable_interrupt(); +void pic_add_idt_entry(IDT_ENTRY entry,int id); + +#endif
\ No newline at end of file |