diff options
| author | sshwarts <sshwarts> | 2008-12-04 18:42:32 +0000 |
|---|---|---|
| committer | sshwarts <sshwarts> | 2008-12-04 18:42:32 +0000 |
| commit | a5a4315b8da32215ec30f0a48e32bd06e7eeafde (patch) | |
| tree | d69709aad216bd839c0354e7e87217885704e70f /bios | |
| parent | 13d71d42060e230ad60dfd9eaba618761ae66443 (diff) | |
Preserve memory content during SMM iniT.
Patch by Gleb Natapov
Diffstat (limited to 'bios')
| -rw-r--r-- | bios/BIOS-bochs-latest | bin | 131042 -> 131042 bytes | |||
| -rw-r--r-- | bios/rombios32.c | 10 |
2 files changed, 8 insertions, 2 deletions
diff --git a/bios/BIOS-bochs-latest b/bios/BIOS-bochs-latest Binary files differindex abadd7ff..f588e7a8 100644 --- a/bios/BIOS-bochs-latest +++ b/bios/BIOS-bochs-latest diff --git a/bios/rombios32.c b/bios/rombios32.c index 19ee2166..4871884d 100644 --- a/bios/rombios32.c +++ b/bios/rombios32.c @@ -731,6 +731,12 @@ static void smm_init(PCIDevice *d) value = pci_config_readl(d, 0x58); if ((value & (1 << 25)) == 0) { + /* enable the SMM memory window */ + pci_config_writeb(&i440_pcidev, 0x72, 0x02 | 0x48); + + /* save original memory content */ + memcpy((void *)0xa8000, (void *)0x38000, 0x8000); + /* copy the SMM relocation code */ memcpy((void *)0x38000, &smm_relocation_start, &smm_relocation_end - &smm_relocation_start); @@ -747,8 +753,8 @@ static void smm_init(PCIDevice *d) /* wait until SMM code executed */ while (inb(0xb3) != 0x00); - /* enable the SMM memory window */ - pci_config_writeb(&i440_pcidev, 0x72, 0x02 | 0x48); + /* restore original memory content */ + memcpy((void *)0x38000, (void *)0xa8000, 0x8000); /* copy the SMM code */ memcpy((void *)0xa8000, &smm_code_start, |