diff options
Diffstat (limited to 'src/cpu/amd/agesa/mtrr_fixme.c')
-rw-r--r-- | src/cpu/amd/agesa/mtrr_fixme.c | 100 |
1 files changed, 0 insertions, 100 deletions
diff --git a/src/cpu/amd/agesa/mtrr_fixme.c b/src/cpu/amd/agesa/mtrr_fixme.c deleted file mode 100644 index 1fbb55318d..0000000000 --- a/src/cpu/amd/agesa/mtrr_fixme.c +++ /dev/null @@ -1,100 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#include <arch/cpu.h> -#include <cbmem.h> -#include <console/console.h> -#include <cpu/amd/mtrr.h> -#include <cpu/cpu.h> -#include <cpu/x86/cache.h> -#include <cpu/x86/msr.h> -#include <cpu/x86/mtrr.h> -#include <northbridge/amd/agesa/agesa_helper.h> - -static void set_range_uc(u32 base, u32 size) -{ - int i, max_var_mtrrs; - msr_t msr; - msr = rdmsr(MTRR_CAP_MSR); - max_var_mtrrs = msr.lo & MTRR_CAP_VCNT; - - for (i = 0; i < max_var_mtrrs; i++) { - msr = rdmsr(MTRR_PHYS_MASK(i)); - if (!(msr.lo & MTRR_PHYS_MASK_VALID)) - break; - } - if (i == max_var_mtrrs) - die("Run out of unused MTRRs\n"); - - msr.hi = 0; - msr.lo = base | MTRR_TYPE_UNCACHEABLE; - wrmsr(MTRR_PHYS_BASE(i), msr); - - msr.hi = (1 << (cpu_phys_address_size() - 32)) - 1; - msr.lo = ~(size - 1) | MTRR_PHYS_MASK_VALID; - wrmsr(MTRR_PHYS_MASK(i), msr); -} - -void fixup_cbmem_to_UC(int s3resume) -{ - if (s3resume) - return; - - /* For normal path, INIT_POST has returned with all - * memory set WB cacheable. But we need CBMEM as UC - * to make CAR teardown with invalidation without - * writeback possible. - */ - - uintptr_t top_of_ram = (uintptr_t) cbmem_top(); - top_of_ram = ALIGN_UP(top_of_ram, 4 * MiB); - - set_range_uc(top_of_ram - 4 * MiB, 4 * MiB); - set_range_uc(top_of_ram - 8 * MiB, 4 * MiB); -} - -void recover_postcar_frame(struct postcar_frame *pcf, int s3resume) -{ - msr_t base, mask; - int i; - - /* Replicate non-UC MTRRs as left behind by AGESA. - */ - for (i = 0; i < pcf->max_var_mtrrs; i++) { - mask = rdmsr(MTRR_PHYS_MASK(i)); - base = rdmsr(MTRR_PHYS_BASE(i)); - u32 size = ~(mask.lo & ~0xfff) + 1; - u8 type = base.lo & 0x7; - base.lo &= ~0xfff; - - if (!(mask.lo & MTRR_PHYS_MASK_VALID) || - (type == MTRR_TYPE_UNCACHEABLE)) - continue; - - postcar_frame_add_mtrr(pcf, base.lo, size, type); - } - - /* For S3 resume path, INIT_RESUME does not return with - * memory covering CBMEM set as WB cacheable. For better - * speed make them WB after CAR teardown. - */ - if (s3resume) { - uintptr_t top_of_ram = (uintptr_t) cbmem_top(); - top_of_ram = ALIGN_DOWN(top_of_ram, 4*MiB); - - postcar_frame_add_mtrr(pcf, top_of_ram - 4*MiB, 4*MiB, - MTRR_TYPE_WRBACK); - postcar_frame_add_mtrr(pcf, top_of_ram - 8*MiB, 4*MiB, - MTRR_TYPE_WRBACK); - } -} |