| 36,7 → 36,7 |
|---|
| #endif |
| |
| #define IDT_ITEMS 64 |
| #define GDT_ITEMS 7 |
| #define GDT_ITEMS 8 |
| |
| #define NULL_DES 0 |
| #define KTEXT_DES 1 |
| 46,7 → 46,8 |
|---|
| #define KTEXT32_DES 5 |
| #define TSS_DES 6 |
| |
| #define selector(des) ((des)<<3) |
| #define gdtselector(des) ((des)<<3) |
| #define idtselector(des) ((des)<<4) |
| |
| #define PL_KERNEL 0 |
| #define PL_USER 3 |
| 56,8 → 57,9 |
|---|
| #define AR_CODE (3<<3) |
| #define AR_WRITABLE (1<<1) |
| #define AR_READABLE (1<<1) |
| #define AR_INTERRUPT (0xe) |
| #define AR_TSS (0x9) |
| #define AR_INTERRUPT (0xe) |
| #define AR_TRAP (0xf) |
| |
| #define DPL_KERNEL (PL_KERNEL<<5) |
| #define DPL_USER (PL_USER<<5) |
| 66,11 → 68,6 |
|---|
| |
| #ifndef __ASM__ |
| |
| struct ptr_16_32 { |
| __u16 limit; |
| __u32 base; |
| } __attribute__ ((packed)); |
| |
| struct descriptor { |
| unsigned limit_0_15: 16; |
| unsigned base_0_15: 16; |
| 84,66 → 81,70 |
|---|
| unsigned base_24_31: 8; |
| } __attribute__ ((packed)); |
| |
| struct tss_descriptor { |
| unsigned limit_0_15: 16; |
| unsigned base_0_15: 16; |
| unsigned base_16_23: 8; |
| unsigned type: 4; |
| unsigned reserve1 : 1; |
| unsigned dpl : 2; |
| unsigned present : 1; |
| unsigned limit_16_19: 4; |
| unsigned available: 1; |
| unsigned reserve2: 2; |
| unsigned granularity : 1; |
| unsigned base_24_31: 8; |
| unsigned base_32_63 : 32; |
| unsigned reserve3 : 32; |
| } __attribute__ ((packed)); |
| |
| struct idescriptor { |
| unsigned offset_0_15: 16; |
| unsigned selector: 16; |
| unsigned unused: 8; |
| unsigned access: 8; |
| unsigned ist:3; |
| unsigned unused: 5; |
| unsigned type: 5; |
| unsigned dpl: 2; |
| unsigned present : 1; |
| unsigned offset_16_31: 16; |
| unsigned offset_32_63: 16; |
| unsigned reserved : 32; |
| } __attribute__ ((packed)); |
| |
| struct ptr_16_64 { |
| __u16 limit; |
| __u64 base; |
| } __attribute__ ((packed)); |
| |
| struct tss { |
| __u16 link; |
| unsigned : 16; |
| __u32 esp0; |
| __u16 ss0; |
| unsigned : 16; |
| __u32 esp1; |
| __u16 ss1; |
| unsigned : 16; |
| __u32 esp2; |
| __u16 ss2; |
| unsigned : 16; |
| __u32 cr3; |
| __u32 eip; |
| __u32 eflags; |
| __u32 eax; |
| __u32 ecx; |
| __u32 edx; |
| __u32 ebx; |
| __u32 esp; |
| __u32 ebp; |
| __u32 esi; |
| __u32 edi; |
| __u16 es; |
| unsigned : 16; |
| __u16 cs; |
| unsigned : 16; |
| __u16 ss; |
| unsigned : 16; |
| __u16 ds; |
| unsigned : 16; |
| __u16 fs; |
| unsigned : 16; |
| __u16 gs; |
| unsigned : 16; |
| __u16 ldtr; |
| unsigned : 16; |
| unsigned : 16; |
| __u16 io_map_base; |
| __u32 reserve1; |
| __u64 rsp0; |
| __u64 rsp1; |
| __u64 rsp2; |
| __u64 reserve2; |
| __u64 ist1; |
| __u64 ist2; |
| __u64 ist3; |
| __u64 ist4; |
| __u64 ist5; |
| __u64 ist6; |
| __u64 ist7; |
| __u64 reserve3; |
| __u16 reserve4; |
| __u16 iomap; |
| } __attribute__ ((packed)); |
| |
| extern struct ptr_16_32 gdtr; |
| extern struct tss *tss_p; |
| |
| extern struct descriptor gdt[]; |
| extern struct idescriptor idt[]; |
| |
| extern struct ptr_16_64 gdtr; |
| |
| extern void pm_init(void); |
| |
| extern void gdt_setbase(struct descriptor *d, __address base); |
| extern void gdt_setlimit(struct descriptor *d, __u32 limit); |
| extern void gdt_tss_setbase(struct descriptor *d, __address base); |
| extern void gdt_tss_setlimit(struct descriptor *d, __u32 limit); |
| |
| extern void idt_init(void); |
| extern void idt_setoffset(struct idescriptor *d, __address offset); |