blob: 511e689c52f41bfe7c20199f8db93e858e7415db [file] [log] [blame]
/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#include <types.h>
#include <string.h>
#include <cbmem.h>
#include <commonlib/helpers.h>
#include <console/console.h>
#include <cpu/x86/gdt.h>
/* i386 lgdt argument */
struct gdtarg {
u16 limit;
#ifdef __x86_64__
u64 base;
u32 base;
} __packed;
* Copy GDT to new location and reload it.
* FIXME: We only do this for BSP CPU.
static void move_gdt(int is_recovery)
void *newgdt;
u16 num_gdt_bytes;
struct gdtarg gdtarg;
/* ramstage is already in high memory. No need to use a new gdt. */
newgdt = cbmem_find(CBMEM_ID_GDT);
num_gdt_bytes = (uintptr_t)&gdt_end - (uintptr_t)&gdt;
if (!newgdt) {
newgdt = cbmem_add(CBMEM_ID_GDT, ALIGN_UP(num_gdt_bytes, 512));
if (!newgdt) {
printk(BIOS_ERR, "Error: Could not relocate GDT.\n");
memcpy((void *)newgdt, &gdt, num_gdt_bytes);
printk(BIOS_DEBUG, "Moving GDT to %p...", newgdt);
gdtarg.base = (uintptr_t)newgdt;
gdtarg.limit = num_gdt_bytes - 1;
__asm__ __volatile__ ("lgdt %0\n\t" : : "m" (gdtarg));
printk(BIOS_DEBUG, "ok\n");