mirrors/Bochs
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

- skip SMM init if already done at first boot time (fixes reboot failure)

Browse Source
This commit is contained in:
Volker Ruppert 2007-12-09 15:38:41 +00:00
parent 29267577f0
commit 688cb87e98
3 changed files with 28 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

BIN
bochs/bios/BIOS-bochs-latest
View File

Binary file not shown.

BIN
bochs/bios/BIOS-bochs-legacy
View File

Binary file not shown.

49
bochs/bios/rombios32.c
View File

@ -1,5 +1,5 @@
/////////////////////////////////////////////////////////////////////////
// $Id: rombios32.c,v 1.16 2007-12-01 19:26:46 vruppert Exp $
// $Id: rombios32.c,v 1.17 2007-12-09 15:37:27 vruppert Exp $
/////////////////////////////////////////////////////////////////////////
//
// 32 bit Bochs BIOS init code
@ -643,32 +643,39 @@ extern uint8_t smm_code_start, smm_code_end;
#ifdef BX_USE_SMM
static void smm_init(PCIDevice *d)
{
/* copy the SMM relocation code */
memcpy((void *)0x38000, &smm_relocation_start,
&smm_relocation_end - &smm_relocation_start);
uint32_t value;
/* enable SMI generation when writing to the APMC register */
pci_config_writel(d, 0x58, pci_config_readl(d, 0x58) | (1 << 25));
/* check if SMM init is already done */
value = pci_config_readl(d, 0x58);
if ((value & (1 << 25)) == 0) {
/* init APM status port */
outb(0xb3, 0x01);
/* copy the SMM relocation code */
memcpy((void *)0x38000, &smm_relocation_start,
&smm_relocation_end - &smm_relocation_start);
/* raise an SMI interrupt */
outb(0xb2, 0x00);
/* enable SMI generation when writing to the APMC register */
pci_config_writel(d, 0x58, value | (1 << 25));
/* wait until SMM code executed */
while (inb(0xb3) != 0x00);
/* init APM status port */
outb(0xb3, 0x01);
/* enable the SMM memory window */
pci_config_writeb(&i440_pcidev, 0x72, 0x02 | 0x48);
/* raise an SMI interrupt */
outb(0xb2, 0x00);
/* 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);
/* 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