diff options
Diffstat (limited to 'src/cpu/intel/smm/gen1')
| -rw-r--r-- | src/cpu/intel/smm/gen1/smi.h | 13 | ||||
| -rw-r--r-- | src/cpu/intel/smm/gen1/smmrelocate.c | 81 |
2 files changed, 94 insertions, 0 deletions
diff --git a/src/cpu/intel/smm/gen1/smi.h b/src/cpu/intel/smm/gen1/smi.h index cc6811fd63..6d08bb3684 100644 --- a/src/cpu/intel/smm/gen1/smi.h +++ b/src/cpu/intel/smm/gen1/smi.h @@ -11,6 +11,10 @@ * GNU General Public License for more details. */ +#include <device/device.h> + +void bsp_init_and_start_aps(struct bus *cpu_bus); + /* These helpers are for performing SMM relocation. */ void southbridge_smm_init(void); void southbridge_trigger_smi(void); @@ -21,3 +25,12 @@ int cpu_get_apic_id_map(int *apic_id_map); void northbridge_write_smram(u8 smram); bool cpu_has_alternative_smrr(void); + +/* parallel MP helper functions */ +void smm_info(uintptr_t *perm_smbase, size_t *perm_smsize, + size_t *smm_save_state_size); +void smm_initialize(void); +void southbridge_smm_clear_state(void); +void smm_relocation_handler(int cpu, uintptr_t curr_smbase, + uintptr_t staggered_smbase); +void smm_relocate(void); diff --git a/src/cpu/intel/smm/gen1/smmrelocate.c b/src/cpu/intel/smm/gen1/smmrelocate.c index 105b9a45ca..4b824a57a5 100644 --- a/src/cpu/intel/smm/gen1/smmrelocate.c +++ b/src/cpu/intel/smm/gen1/smmrelocate.c @@ -22,10 +22,12 @@ #include <device/device.h> #include <device/pci.h> #include <cpu/x86/cache.h> +#include <cpu/x86/mp.h> #include <cpu/x86/msr.h> #include <cpu/x86/mtrr.h> #include <cpu/x86/smm.h> #include <console/console.h> +#include <smp/node.h> #include "smi.h" #define SMRR_SUPPORTED (1 << 11) @@ -349,3 +351,82 @@ void smm_lock(void) northbridge_write_smram(D_LCK | G_SMRAME | C_BASE_SEG); } + +void smm_info(uintptr_t *perm_smbase, size_t *perm_smsize, + size_t *smm_save_state_size) +{ + printk(BIOS_DEBUG, "Setting up SMI for CPU\n"); + + fill_in_relocation_params(&smm_reloc_params); + + if (CONFIG_IED_REGION_SIZE != 0) + setup_ied_area(&smm_reloc_params); + + *perm_smbase = smm_reloc_params.smram_base; + *perm_smsize = smm_reloc_params.smram_size; + *smm_save_state_size = sizeof(em64t101_smm_state_save_area_t); +} + +void smm_initialize(void) +{ + /* Clear the SMM state in the southbridge. */ + southbridge_smm_clear_state(); + + /* + * Run the relocation handler for on the BSP to check and set up + * parallel SMM relocation. + */ + smm_initiate_relocation(); +} + +/* The relocation work is actually performed in SMM context, but the code + * resides in the ramstage module. This occurs by trampolining from the default + * SMRAM entry point to here. */ +void smm_relocation_handler(int cpu, uintptr_t curr_smbase, + uintptr_t staggered_smbase) +{ + msr_t mtrr_cap; + struct smm_relocation_params *relo_params = &smm_reloc_params; + em64t101_smm_state_save_area_t *save_state; + u32 smbase = staggered_smbase; + u32 iedbase = relo_params->ied_base; + + printk(BIOS_DEBUG, "In relocation handler: cpu %d\n", cpu); + + /* Make appropriate changes to the save state map. */ + if (CONFIG_IED_REGION_SIZE != 0) + printk(BIOS_DEBUG, "New SMBASE=0x%08x IEDBASE=0x%08x\n", + smbase, iedbase); + else + printk(BIOS_DEBUG, "New SMBASE=0x%08x\n", + smbase); + + save_state = (void *)(curr_smbase + SMM_DEFAULT_SIZE - + sizeof(*save_state)); + save_state->smbase = smbase; + save_state->iedbase = iedbase; + + /* Write EMRR and SMRR MSRs based on indicated support. */ + mtrr_cap = rdmsr(MTRR_CAP_MSR); + if (mtrr_cap.lo & SMRR_SUPPORTED && relo_params->smrr_mask.lo != 0) + write_smrr(relo_params); +} + +/* + * The default SMM entry can happen in parallel or serially. If the + * default SMM entry is done in parallel the BSP has already setup + * the saving state to each CPU's MSRs. At least one save state size + * is required for the initial SMM entry for the BSP to determine if + * parallel SMM relocation is even feasible. + */ +void smm_relocate(void) +{ + /* + * If smm_save_state_in_msrs is non-zero then parallel SMM relocation + * shall take place. Run the relocation handler a second time on the + * BSP to do the final move. For APs, a relocation handler always + * needs to be run. + */ + if (!boot_cpu()) + smm_initiate_relocation(); +} |