diff options
Diffstat (limited to 'src/northbridge/amd/agesa')
| -rw-r--r-- | src/northbridge/amd/agesa/family14/state_machine.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/northbridge/amd/agesa/family14/state_machine.c b/src/northbridge/amd/agesa/family14/state_machine.c index 81d15bc445..025d94fffd 100644 --- a/src/northbridge/amd/agesa/family14/state_machine.c +++ b/src/northbridge/amd/agesa/family14/state_machine.c @@ -16,7 +16,13 @@ #include "Porting.h" #include "AGESA.h" +#include <arch/io.h> #include <cbmem.h> +#include <device/device.h> +#include <device/pci_def.h> +#include <halt.h> +#include <reset.h> +#include <smp/node.h> #include <northbridge/amd/agesa/state_machine.h> #include <northbridge/amd/agesa/agesa_helper.h> @@ -24,6 +30,24 @@ void platform_BeforeInitReset(struct sysinfo *cb, AMD_RESET_PARAMS *Reset) { + /* Reboots with outb(3,0x92), outb(4,0xcf9) or triple-fault all + * would fail later in AmdInitPost(), when DRAM is already configured + * and C6DramLock bit has been set. + * + * As a workaround, do a hard reset to clear C6DramLock bit. + */ +#ifdef __SIMPLE_DEVICE__ + pci_devfn_t dev = PCI_DEV(0, 0x18, 2); +#else + struct device *dev = dev_find_slot(0, PCI_DEVFN(0x18, 2)); +#endif + if (boot_cpu()) { + u32 mct_cfg_lo = pci_read_config32(dev, 0x118); + if (mct_cfg_lo & (1<<19)) { + printk(BIOS_CRIT, "C6DramLock is set, resetting\n"); + hard_reset(); + } + } } void platform_BeforeInitEarly(struct sysinfo *cb, AMD_EARLY_PARAMS *Early) |