diff options
| -rw-r--r-- | src/northbridge/intel/e7505/e7505.h | 2 | ||||
| -rw-r--r-- | src/northbridge/intel/e7505/memmap.c | 8 | ||||
| -rw-r--r-- | src/southbridge/intel/i82801dx/i82801dx.h | 3 | ||||
| -rw-r--r-- | src/southbridge/intel/i82801dx/lpc.c | 6 | ||||
| -rw-r--r-- | src/southbridge/intel/i82801dx/smi.c | 19 |
5 files changed, 25 insertions, 13 deletions
diff --git a/src/northbridge/intel/e7505/e7505.h b/src/northbridge/intel/e7505/e7505.h index b80d8a8a52f8..faf91440e8f2 100644 --- a/src/northbridge/intel/e7505/e7505.h +++ b/src/northbridge/intel/e7505/e7505.h @@ -42,6 +42,8 @@ #define DRC 0x7C /* DRAM Controller Mode register, 32 bit */ #define DRDCTL 0x80 /* DRAM Read Timing Control register, 16 bit? (if similar to 855PM) */ #define CKDIS 0x8C /* Clock disable register, 8 bit */ +#define SMRAMC 0x9D +#define ESMRAMC 0x9E #define APSIZE 0xB4 #define TOLM 0xC4 /* Top of Low Memory register, 16 bit */ #define REMAPBASE 0xC6 /* Remap Base Address register, 16 bit */ diff --git a/src/northbridge/intel/e7505/memmap.c b/src/northbridge/intel/e7505/memmap.c index d45006566e4e..b954c6af7453 100644 --- a/src/northbridge/intel/e7505/memmap.c +++ b/src/northbridge/intel/e7505/memmap.c @@ -35,6 +35,14 @@ void *cbmem_top(void) return (void *)tolm; } +void northbridge_write_smram(u8 smram); + +void northbridge_write_smram(u8 smram) +{ + pci_devfn_t mch = PCI_DEV(0, 0, 0); + pci_write_config8(mch, SMRAMC, smram); +} + /* platform_enter_postcar() determines the stack to use after * cache-as-ram is torn down as well as the MTRR settings to use, * and continues execution in postcar stage. */ diff --git a/src/southbridge/intel/i82801dx/i82801dx.h b/src/southbridge/intel/i82801dx/i82801dx.h index 678d5d78b974..ac53ae13a3cd 100644 --- a/src/southbridge/intel/i82801dx/i82801dx.h +++ b/src/southbridge/intel/i82801dx/i82801dx.h @@ -37,6 +37,9 @@ extern void i82801dx_enable(struct device *dev); void enable_smbus(void); int smbus_read_byte(unsigned device, unsigned address); #endif + +void aseg_smm_lock(void); + #endif #define DEBUG_PERIODIC_SMIS 0 diff --git a/src/southbridge/intel/i82801dx/lpc.c b/src/southbridge/intel/i82801dx/lpc.c index 3c74e98f598d..94d8e14eb355 100644 --- a/src/southbridge/intel/i82801dx/lpc.c +++ b/src/southbridge/intel/i82801dx/lpc.c @@ -299,6 +299,12 @@ static void lpc_init(struct device *dev) /* Initialize the High Precision Event Timers */ enable_hpet(dev); + + /* Don't allow evil boot loaders, kernels, or + * userspace applications to deceive us: + */ + if (CONFIG(HAVE_SMI_HANDLER)) + aseg_smm_lock(); } static void i82801dx_lpc_read_resources(struct device *dev) diff --git a/src/southbridge/intel/i82801dx/smi.c b/src/southbridge/intel/i82801dx/smi.c index b977e32cd2e1..7dfed9d946c9 100644 --- a/src/southbridge/intel/i82801dx/smi.c +++ b/src/southbridge/intel/i82801dx/smi.c @@ -26,8 +26,10 @@ #include <string.h> #include "i82801dx.h" -/* I945 */ -#define SMRAM 0x90 + +void northbridge_write_smram(u8 smram); + +/* For intel/e7505. */ #define D_OPEN (1 << 6) #define D_CLS (1 << 5) #define D_LCK (1 << 4) @@ -317,18 +319,10 @@ static void smm_relocate(void) static void smm_install(void) { - /* enable the SMM memory window */ - pci_write_config8(pcidev_on_root(0, 0), SMRAM, - D_OPEN | G_SMRAME | C_BASE_SEG); - /* copy the real SMM handler */ memcpy((void *)0xa0000, _binary_smm_start, _binary_smm_end - _binary_smm_start); wbinvd(); - - /* close the SMM memory window and enable normal SMM */ - pci_write_config8(pcidev_on_root(0, 0), SMRAM, - G_SMRAME | C_BASE_SEG); } void smm_init(void) @@ -348,15 +342,14 @@ void smm_init_completion(void) restore_default_smm_area(default_smm_area); } -void smm_lock(void) +void aseg_smm_lock(void) { /* LOCK the SMM memory window and enable normal SMM. * After running this function, only a full reset can * make the SMM registers writable again. */ printk(BIOS_DEBUG, "Locking SMM.\n"); - pci_write_config8(pcidev_on_root(0, 0), SMRAM, - D_LCK | G_SMRAME | C_BASE_SEG); + northbridge_write_smram(D_LCK | G_SMRAME | C_BASE_SEG); } void smm_setup_structures(void *gnvs, void *tcg, void *smi1) |