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x86: ivybridge: Drop the SMM-locking code 

U-Boot does not support SMM yet, so we can drop this code. It is easy to
bring back when needed.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2016-01-17 16:11:57 -07:00 committed by Bin Meng
parent b2a6235920
commit 67292e4c27
1 changed files with 0 additions and 57 deletions
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57
arch/x86/cpu/ivybridge/lpc.c
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@ -379,59 +379,6 @@ static void enable_clock_gating(struct udevice *pch)
setbits_le32(RCB_REG(0x3564), 0x3); setbits_le32(RCB_REG(0x3564), 0x3);
} }
#if CONFIG_HAVE_SMI_HANDLER
static void pch_lock_smm(pci_dev_t dev)
{
#if TEST_SMM_FLASH_LOCKDOWN
u8 reg8;
#endif
if (acpi_slp_type != 3) {
#if ENABLE_ACPI_MODE_IN_COREBOOT
debug("Enabling ACPI via APMC:\n");
outb(0xe1, 0xb2); /* Enable ACPI mode */
debug("done.\n");
#else
debug("Disabling ACPI via APMC:\n");
outb(0x1e, 0xb2); /* Disable ACPI mode */
debug("done.\n");
#endif
}
/* Don't allow evil boot loaders, kernels, or
* userspace applications to deceive us:
*/
smm_lock();
#if TEST_SMM_FLASH_LOCKDOWN
/* Now try this: */
debug("Locking BIOS to RO... ");
reg8 = x86_pci_read_config8(dev, 0xdc); /* BIOS_CNTL */
debug(" BLE: %s; BWE: %s\n", (reg8 & 2) ? "on" : "off",
(reg8 & 1) ? "rw" : "ro");
reg8 &= ~(1 << 0); /* clear BIOSWE */
x86_pci_write_config8(dev, 0xdc, reg8);
reg8 |= (1 << 1); /* set BLE */
x86_pci_write_config8(dev, 0xdc, reg8);
debug("ok.\n");
reg8 = x86_pci_read_config8(dev, 0xdc); /* BIOS_CNTL */
debug(" BLE: %s; BWE: %s\n", (reg8 & 2) ? "on" : "off",
(reg8 & 1) ? "rw" : "ro");
debug("Writing:\n");
writeb(0, 0xfff00000);
debug("Testing:\n");
reg8 |= (1 << 0); /* set BIOSWE */
x86_pci_write_config8(dev, 0xdc, reg8);
reg8 = x86_pci_read_config8(dev, 0xdc); /* BIOS_CNTL */
debug(" BLE: %s; BWE: %s\n", (reg8 & 2) ? "on" : "off",
(reg8 & 1) ? "rw" : "ro");
debug("Done.\n");
#endif
}
#endif
static void pch_disable_smm_only_flashing(struct udevice *pch) static void pch_disable_smm_only_flashing(struct udevice *pch)
{ {
u8 reg8; u8 reg8;
@ -596,10 +543,6 @@ static int lpc_init_extra(struct udevice *dev)
pch_disable_smm_only_flashing(pch); pch_disable_smm_only_flashing(pch);
#if CONFIG_HAVE_SMI_HANDLER
pch_lock_smm(dev);
#endif
pch_fixups(pch); pch_fixups(pch);
return 0; return 0;