blob: 10b35d7fe2375bc28d99ec647fbbfbc3fba32b99 (
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
|
/* SPDX-License-Identifier: GPL-2.0-only */
#define __SIMPLE_DEVICE__
#include <console/console.h>
#include <cpu/x86/smm.h>
#include <device/pci_ops.h>
#include <mainboard/emulation/qemu-i440fx/memory.h>
#include <mainboard/emulation/qemu-i440fx/fw_cfg.h>
#include "q35.h"
/* QEMU-specific register */
#define EXT_TSEG_MBYTES 0x50
void smm_region(uintptr_t *start, size_t *size)
{
uint8_t esmramc = pci_read_config8(HOST_BRIDGE, ESMRAMC);
switch ((esmramc & TSEG_SZ_MASK) >> 1) {
case 0:
*size = 1 * MiB;
break;
case 1:
*size = 2 * MiB;
break;
case 2:
*size = 8 * MiB;
break;
default:
*size = pci_read_config16(HOST_BRIDGE, EXT_TSEG_MBYTES) * MiB;
}
*start = qemu_get_memory_size() * KiB - *size;
printk(BIOS_SPEW, "SMM_BASE: 0x%08lx, SMM_SIZE: %zu MiB\n", *start, *size / MiB);
}
|
