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Implemented GDT initialisation

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This commit is contained in:
max 🍓
2022-12-24 10:28:41 +00:00
parent 0c0830cca7
commit 26853c32c8
10 changed files with 129 additions and 3 deletions
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42
arch/x86_64/include/socks/machine/_gdt.h Normal file
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#ifndef SOCKS_X86_64__GDT_H_
#define SOCKS_X86_64__GDT_H_
#include <socks/compiler.h>
#include <stdint.h>
#define NR_GDT_ENTRIES 5
#define GDT_A_PRESENT (1 << 7)
#define GDT_A_USER (3 << 5)
#define GDT_A_CODE (3 << 3)
#define GDT_A_DATA (8 << 1)
#define GDT_A_RPLK (1 << 5)
#define GDT_A_CODEREAD (1 << 1)
#define GDT_A_DATAWRITE (1 << 1)
#define GDT_A_GROWUP (1 << 5)
#define GDT_F_64BIT (0x2F)
#define GDT_F_32BIT (0x4F)
#define GDT_F_16BIT (0xF)
struct gdt_entry {
uint16_t ge_limit_low;
uint16_t ge_base_low;
uint8_t ge_base_mid;
uint8_t ge_access;
uint8_t ge_gran;
uint8_t ge_base_hi;
} __packed;
struct gdt {
struct gdt_entry g_entries[NR_GDT_ENTRIES];
} __packed;
struct gdt_ptr {
uint16_t g_limit;
uint64_t g_ptr;
} __packed;
extern int gdt_init(struct gdt *gdt, struct gdt_ptr *gdtp);
extern int gdt_load(struct gdt_ptr *gdtp);
#endif

0
arch/x86_64/include/socks/machine/_tss.h Normal file
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7
arch/x86_64/include/socks/machine/cpu.h
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@@ -1,10 +1,15 @@
#ifndef SOCKS_X86_64_CPU_H_
#define SOCKS_X86_64_CPU_H_
typedef struct ml_cpu_block {
#include <socks/machine/_gdt.h>
typedef struct ml_cpu_block {
struct gdt c_gdt;
struct gdt_ptr c_gdt_ptr;
} ml_cpu_block;
extern int ml_init_bootcpu(void);
extern int ml_cpu_block_init(ml_cpu_block *p);
extern int ml_cpu_block_use(ml_cpu_block *p);