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Line 34... Line 34...
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# include <typedefs.h>
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# include <typedefs.h>
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# include <arch/context.h>
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# include <arch/context.h>
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#endif
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#endif
37 
 
 37 
 
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#define IDT_ITEMS 64
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#define IDT_ITEMS 64
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#define GDT_ITEMS 7
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#define GDT_ITEMS 8
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 40 
 
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#define NULL_DES    0
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#define NULL_DES    0
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#define KTEXT_DES   1
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#define KTEXT_DES   1
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#define KDATA_DES   2
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#define KDATA_DES   2
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#define UTEXT_DES   3
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#define UTEXT_DES   3
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#define UDATA_DES   4
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#define UDATA_DES   4
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#define KTEXT32_DES     5
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#define KTEXT32_DES     5
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#define TSS_DES     6
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#define TSS_DES     6
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 48 
 
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#define selector(des)   ((des)<<3)
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#define gdtselector(des)    ((des)<<3)
- 
 
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#define idtselector(des)        ((des)<<4)
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 51 
 
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#define PL_KERNEL   0
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#define PL_KERNEL   0
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#define PL_USER     3
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#define PL_USER     3
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 54 
 
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#define AR_PRESENT  (1<<7)
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#define AR_PRESENT  (1<<7)
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#define AR_DATA     (2<<3)
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#define AR_DATA     (2<<3)
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#define AR_CODE     (3<<3)
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#define AR_CODE     (3<<3)
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#define AR_WRITABLE (1<<1)
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#define AR_WRITABLE (1<<1)
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#define AR_READABLE     (1<<1)
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#define AR_READABLE     (1<<1)
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#define AR_INTERRUPT    (0xe)
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#define AR_TSS      (0x9)
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#define AR_TSS      (0x9)
- 
 
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#define AR_INTERRUPT    (0xe)
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#define AR_TRAP         (0xf)
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#define DPL_KERNEL  (PL_KERNEL<<5)
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#define DPL_KERNEL  (PL_KERNEL<<5)
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#define DPL_USER    (PL_USER<<5)
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#define DPL_USER    (PL_USER<<5)
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#define IO_MAP_BASE (104)
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#define IO_MAP_BASE (104)
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#ifndef __ASM__
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#ifndef __ASM__
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struct ptr_16_32 {
 - 
 
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    __u16 limit;
 - 
 
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    __u32 base;
 - 
 
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} __attribute__ ((packed));
 - 
 
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 - 
 
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struct descriptor {
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struct descriptor {
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    unsigned limit_0_15: 16;
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    unsigned limit_0_15: 16;
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    unsigned base_0_15: 16;
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    unsigned base_0_15: 16;
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    unsigned base_16_23: 8;
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    unsigned base_16_23: 8;
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    unsigned access: 8;
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    unsigned access: 8;
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    unsigned special: 1;
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    unsigned special: 1;
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    unsigned granularity : 1;
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    unsigned granularity : 1;
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    unsigned base_24_31: 8;
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    unsigned base_24_31: 8;
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} __attribute__ ((packed));
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} __attribute__ ((packed));
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- 
 
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struct tss_descriptor {
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    unsigned limit_0_15: 16;
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    unsigned base_0_15: 16;
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    unsigned base_16_23: 8;
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    unsigned type: 4;
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    unsigned reserve1 : 1;
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    unsigned dpl : 2;
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    unsigned present : 1;
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    unsigned limit_16_19: 4;
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    unsigned available: 1;
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    unsigned reserve2: 2;
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    unsigned granularity : 1;
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    unsigned base_24_31: 8;
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    unsigned base_32_63 : 32;
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    unsigned reserve3 : 32;
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} __attribute__ ((packed));
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struct idescriptor {
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struct idescriptor {
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    unsigned offset_0_15: 16;
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    unsigned offset_0_15: 16;
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    unsigned selector: 16;
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    unsigned selector: 16;
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    unsigned ist:3;
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    unsigned unused: 8;
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    unsigned unused: 5;
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    unsigned access: 8;
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    unsigned type: 5;
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    unsigned dpl: 2;
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    unsigned present : 1;
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    unsigned offset_16_31: 16;
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    unsigned offset_16_31: 16;
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    unsigned offset_32_63: 16;
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    unsigned reserved : 32;
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} __attribute__ ((packed));
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} __attribute__ ((packed));
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- 
 
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struct ptr_16_64 {
- 
 
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    __u16 limit;
- 
 
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    __u64 base;
- 
 
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} __attribute__ ((packed));
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96 
struct tss {
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struct tss {
97 
    __u16 link;
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    unsigned : 16;
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    __u32 esp0;
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    __u32 reserve1;
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    __u16 ss0;
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    __u64 rsp0;
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    unsigned : 16;
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    __u32 esp1;
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    __u64 rsp1;
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    __u16 ss1;
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    unsigned : 16;
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    __u32 esp2;
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    __u64 rsp2;
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    __u16 ss2;
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    __u64 reserve2;
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    unsigned : 16;
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    __u32 cr3;
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    __u32 eip;
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    __u32 eflags;
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    __u32 eax;
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    __u32 ecx;
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    __u32 edx;
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    __u32 ebx;
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    __u32 esp;
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    __u64 ist1;
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    __u32 ebp;
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    __u32 esi;
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    __u64 ist2;
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    __u32 edi;
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    __u16 es;
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    __u64 ist3;
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    unsigned : 16;
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    __u16 cs;
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    __u64 ist4;
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    unsigned : 16;
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    __u16 ss;
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    __u64 ist5;
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    unsigned : 16;
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    __u16 ds;
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    __u64 ist6;
126 
    unsigned : 16;
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    __u16 fs;
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    __u64 ist7;
128 
    unsigned : 16;
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    __u16 gs;
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    __u64 reserve3;
130 
    unsigned : 16;
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    __u16 ldtr;
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    __u16 reserve4;
132 
    unsigned : 16;
 - 
 
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    unsigned : 16;
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    __u16 io_map_base;
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    __u16 iomap;
135 
} __attribute__ ((packed));
 135 
} __attribute__ ((packed));
136 
 
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137 
extern struct ptr_16_32 gdtr;
 - 
 
138 
extern struct tss *tss_p;
 137 
extern struct tss *tss_p;
139 
 
 138 
 
140 
extern struct descriptor gdt[];
 139 
extern struct descriptor gdt[];
141 
extern struct idescriptor idt[];
 140 
extern struct idescriptor idt[];
142 
 
 141 
 
- 
 
 142 
extern struct ptr_16_64 gdtr;
- 
 
 143 
 
143 
extern void pm_init(void);
 144 
extern void pm_init(void);
144 
 
 145 
 
145 
extern void gdt_setbase(struct descriptor *d, __address base);
 146 
extern void gdt_tss_setbase(struct descriptor *d, __address base);
146 
extern void gdt_setlimit(struct descriptor *d, __u32 limit);
 147 
extern void gdt_tss_setlimit(struct descriptor *d, __u32 limit);
147 
 
 148 
 
148 
extern void idt_init(void);
 149 
extern void idt_init(void);
149 
extern void idt_setoffset(struct idescriptor *d, __address offset);
 150 
extern void idt_setoffset(struct idescriptor *d, __address offset);
150 
 
 151 
 
151 
extern void tss_initialize(struct tss *t);
 152 
extern void tss_initialize(struct tss *t);