wash
6019c9307d
all kernel headers have been moved from include/mango to include/kernel and include definitions that are only relevant to kernel-space. any definitions that are relevant to both kernel- and user-space (i.e. type definitions, syscall IDs) have been moved to include/mango within libmango.
54 lines
1.0 KiB
C
54 lines
1.0 KiB
C
#ifndef ARCH_GDT_H_
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#define ARCH_GDT_H_
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#include <arch/tss.h>
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#include <kernel/compiler.h>
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define NR_GDT_ENTRIES 5
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#define GDT_A_PRESENT (1 << 7)
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#define GDT_A_USER (3 << 5)
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#define GDT_A_CODE (3 << 3)
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#define GDT_A_DATA (8 << 1)
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#define GDT_A_RPLK (1 << 5)
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#define GDT_A_CODEREAD (1 << 1)
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#define GDT_A_DATAWRITE (1 << 1)
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#define GDT_A_GROWUP (1 << 5)
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#define GDT_F_64BIT (0x2F)
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#define GDT_F_32BIT (0x4F)
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#define GDT_F_16BIT (0xF)
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struct gdt_entry {
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uint16_t ge_limit_low;
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uint16_t ge_base_low;
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uint8_t ge_base_mid;
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uint8_t ge_access;
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uint8_t ge_gran;
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uint8_t ge_base_hi;
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} __packed;
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struct gdt {
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struct gdt_entry g_entries[NR_GDT_ENTRIES];
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struct tss_gdt_entry g_tss;
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} __packed;
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struct gdt_ptr {
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uint16_t g_limit;
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uint64_t g_ptr;
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} __packed;
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extern int gdt_init(struct gdt *gdt, struct gdt_ptr *gdtp);
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extern void gdt_write_tss(struct gdt *gdt, struct tss *tss);
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extern int gdt_load(struct gdt_ptr *gdtp);
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#ifdef __cplusplus
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}
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#endif
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#endif
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