diff options
Diffstat (limited to 'src/arch/x86')
| -rw-r--r-- | src/arch/x86/include/arch/cpu.h | 5 | ||||
| -rw-r--r-- | src/arch/x86/postcar_loader.c | 31 |
2 files changed, 26 insertions, 10 deletions
diff --git a/src/arch/x86/include/arch/cpu.h b/src/arch/x86/include/arch/cpu.h index a923d8e48e..9c94ab1e8e 100644 --- a/src/arch/x86/include/arch/cpu.h +++ b/src/arch/x86/include/arch/cpu.h @@ -271,6 +271,11 @@ struct postcar_frame { int postcar_frame_init(struct postcar_frame *pcf, size_t stack_size); /* + * Initialize postcar_frame object with a fixed stacktop in low memory. + */ +void postcar_frame_init_lowmem(struct postcar_frame *pcf); + +/* * Add variable MTRR covering the provided range with MTRR type. */ void postcar_frame_add_mtrr(struct postcar_frame *pcf, diff --git a/src/arch/x86/postcar_loader.c b/src/arch/x86/postcar_loader.c index 23f33d556d..287a0d807b 100644 --- a/src/arch/x86/postcar_loader.c +++ b/src/arch/x86/postcar_loader.c @@ -33,13 +33,20 @@ static inline void stack_push(struct postcar_frame *pcf, uint32_t val) *ptr = val; } -int postcar_frame_init(struct postcar_frame *pcf, size_t stack_size) +static void postcar_frame_prepare(struct postcar_frame *pcf) { - void *stack; msr_t msr; - msr = rdmsr(MTRR_CAP_MSR); + pcf->upper_mask = (1 << (cpu_phys_address_size() - 32)) - 1; + pcf->max_var_mttrs = msr.lo & MTRR_CAP_VCNT; + pcf->num_var_mttrs = 0; +} + +int postcar_frame_init(struct postcar_frame *pcf, size_t stack_size) +{ + void *stack; + stack = cbmem_add(CBMEM_ID_ROMSTAGE_RAM_STACK, stack_size); if (stack == NULL) { printk(BIOS_ERR, "Couldn't add %zd byte stack in cbmem.\n", @@ -47,18 +54,22 @@ int postcar_frame_init(struct postcar_frame *pcf, size_t stack_size) return -1; } + postcar_frame_prepare(pcf); pcf->stack = (uintptr_t)stack; pcf->stack += stack_size; - - pcf->upper_mask = (1 << (cpu_phys_address_size() - 32)) - 1; - - pcf->max_var_mttrs = msr.lo & MTRR_CAP_VCNT; - - pcf->num_var_mttrs = 0; - return 0; } +/* + * For use with LATE_CBMEM_INIT boards only, with a fixed stacktop in + * low memory. + */ +void postcar_frame_init_lowmem(struct postcar_frame *pcf) +{ + postcar_frame_prepare(pcf); + pcf->stack = CONFIG_RAMTOP; +} + void postcar_frame_add_mtrr(struct postcar_frame *pcf, uintptr_t addr, size_t size, int type) { |