blob: 83ab858e226ca55582a178120dcc7ba1a7b47f72 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2008-2009 coresystems GmbH
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <types.h>
#include <string.h>
#include <cbmem.h>
#include <console/console.h>
#include <cpu/x86/gdt.h>
/* i386 lgdt argument */
struct gdtarg {
u16 limit;
#ifdef __x86_64__
u64 base;
#else
u32 base;
#endif
} __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. */
if (IS_ENABLED(CONFIG_RELOCATABLE_RAMSTAGE))
return;
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(num_gdt_bytes, 512));
if (!newgdt) {
printk(BIOS_ERR, "Error: Could not relocate GDT.\n");
return;
}
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");
}
RAMSTAGE_CBMEM_INIT_HOOK(move_gdt)
|
