alexvoste
41 lines
1.5 KiB
C
41 lines
1.5 KiB
C
#include "../../include/gdt/gdt.h"
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#include "../../include/smp/smp.h"
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#include "../../include/io/serial.h"
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#include <string.h>
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#include <stddef.h>
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gdt_pointer_t gdtr;
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struct {
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gdt_entry_t gdt_entries[5 + (MAX_CPUS * 2)];
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} __attribute__((packed)) gdt;
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tss_t *tss[MAX_CPUS] = {0};
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__attribute__((aligned(16))) char kernel_stacks[MAX_CPUS][KERNEL_STACK_SIZE];
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__attribute__((aligned(16))) char def_ist_stacks[MAX_CPUS][KERNEL_STACK_SIZE];
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__attribute__((aligned(16))) char df_stacks[MAX_CPUS][KERNEL_STACK_SIZE];
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__attribute__((aligned(16))) char nmi_stacks[MAX_CPUS][KERNEL_STACK_SIZE];
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__attribute__((aligned(16))) char pf_stacks[MAX_CPUS][KERNEL_STACK_SIZE];
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extern void _load_gdt(gdt_pointer_t *descriptor);
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extern void _reload_segments(uint64_t cs, uint64_t ds);
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void gdt_init(void) {
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memset(&gdt, 0, sizeof(gdt));
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gdt.gdt_entries[0] = (gdt_entry_t)GDT_ENTRY(0, 0, 0x00, 0x0);
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gdt.gdt_entries[1] = (gdt_entry_t)GDT_ENTRY(0, 0xFFFFF, 0x9A, 0xA);
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gdt.gdt_entries[2] = (gdt_entry_t)GDT_ENTRY(0, 0xFFFFF, 0x92, 0xC);
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gdt.gdt_entries[3] = (gdt_entry_t)GDT_ENTRY(0, 0xFFFFF, 0xF2, 0x8);
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gdt.gdt_entries[4] = (gdt_entry_t)GDT_ENTRY(0, 0xFFFFF, 0xFA, 0xA);
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gdtr.size = (5 * sizeof(gdt_entry_t)) - 1;
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gdtr.pointer = &gdt.gdt_entries[0];
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serial_printf("Installing temporary GDT for BSP...\n");
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gdt_load();
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serial_printf("Temporary GDT installed\n");
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}
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void gdt_load(void) {
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_load_gdt(&gdtr);
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_reload_segments(GDT_CODE_SEGMENT, GDT_DATA_SEGMENT);
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} |