+++ /dev/null
-/*
- * smm.c
- * SMM support for BIOS.
- *
- * Copyright (C) 2002 MandrakeSoft S.A.
- * Copyright (C) 2008 Nguyen Anh Quynh <aquynh@gmail.com>
- *
- * This file may be distributed under the terms of the GNU GPLv3 license.
- */
-
-#include "types.h"
-#include "pci.h"
-#include "smm.h" // smm_init
-#include "config.h" // CONFIG_*
-#include "util.h" // memcpy
-
-#ifdef CONFIG_SMM
-
-asm (
-" .global smm_relocation_start \n"
-" .global smm_relocation_end \n"
-" .global smm_code_start \n"
-" .global smm_code_end \n"
-" \n"
-" .code16 \n"
-" /* code to relocate SMBASE to 0xa0000 */ \n"
-"smm_relocation_start: \n"
-" movl $0x38000 + 0x7efc, %ebx \n"
-" /* revision ID to see if x86_64 or x86 */ \n"
-" mov (%ebx), %al \n"
-" cmpb $0x64, %al \n"
-" je 1f \n"
-" movl $0x38000 + 0x7ef8, %ebx \n"
-" jmp 2f \n"
-"1: \n"
-" movl $0x38000 + 0x7f00, %ebx \n"
-"2: \n"
-" movl $0xa0000, %eax \n"
-" movl %eax, (%ebx) \n"
-" /* indicate to the BIOS that the SMM code was executed */ \n"
-" mov $0x00, %al \n"
-" movw $0xb3, %dx \n"
-" outb %al, %dx \n"
-" rsm \n"
-"smm_relocation_end: \n"
-" \n"
-" /* minimal SMM code to enable or disable ACPI */ \n"
-"smm_code_start: \n"
-" movw $0xb2, %dx \n"
-" inb %dx, %al \n"
-" cmp $0xf0, %al \n"
-" jne 1f \n"
-" \n"
-" /* ACPI disable */ \n"
-" //mov $PM_IO_BASE + 0x04, %dx /* PMCNTRL */ \n"
-" mov $0xb000 + 0x04, %dx /* PMCNTRL */ \n"
-" inw %dx, %ax \n"
-" andw $~1, %ax \n"
-" outw %ax, %dx \n"
-" \n"
-" jmp 2f \n"
-"1: \n"
-" cmp $0xf1, %al \n"
-" jne 2f \n"
-" \n"
-" /* ACPI enable */ \n"
-" //mov $PM_IO_BASE + 0x04, %dx /* PMCNTRL */ \n"
-" mov $0xb000 + 0x04, %dx /* PMCNTRL */ \n"
-" inw %dx, %ax \n"
-" orw $1, %ax \n"
-" outw %ax, %dx \n"
-" \n"
-"2: \n"
-" rsm \n"
-"smm_code_end: \n"
-" .code32 \n"
- );
-
-extern u8 smm_relocation_start, smm_relocation_end;
-extern u8 smm_code_start, smm_code_end;
-
-void
-smm_init(PCIDevice *d)
-{
- u32 value;
-
- /* check if SMM init is already done */
- value = pci_config_readl(d, 0x58);
- if ((value & (1 << 25)) == 0) {
- /* copy the SMM relocation code */
- memcpy((void *)0x38000, &smm_relocation_start,
- &smm_relocation_end - &smm_relocation_start);
-
- /* enable SMI generation when writing to the APMC register */
- pci_config_writel(d, 0x58, value | (1 << 25));
-
- /* init APM status port */
- outb(0x01, 0xb3);
-
- /* raise an SMI interrupt */
- outb(0x00, 0xb2);
-
- /* wait until SMM code executed */
- while (inb(0xb3) != 0x00);
-
- /* enable the SMM memory window */
- pci_config_writeb(&i440_pcidev, 0x72, 0x02 | 0x48);
-
- /* copy the SMM code */
- memcpy((void *)0xa8000, &smm_code_start,
- &smm_code_end - &smm_code_start);
- wbinvd();
-
- /* close the SMM memory window and enable normal SMM */
- pci_config_writeb(&i440_pcidev, 0x72, 0x02 | 0x08);
- }
-}
-#endif
projects / seabios.git / blobdiff