diff options
Diffstat (limited to 'src/cpu/x86/smm')
| -rw-r--r-- | src/cpu/x86/smm/Makefile.inc | 6 | ||||
| -rw-r--r-- | src/cpu/x86/smm/stage_cache.c | 33 | ||||
| -rw-r--r-- | src/cpu/x86/smm/tseg_region.c | 86 |
3 files changed, 89 insertions, 36 deletions
diff --git a/src/cpu/x86/smm/Makefile.inc b/src/cpu/x86/smm/Makefile.inc index fe149f140f..2bb4fd7d3c 100644 --- a/src/cpu/x86/smm/Makefile.inc +++ b/src/cpu/x86/smm/Makefile.inc @@ -42,9 +42,9 @@ endif ifeq ($(CONFIG_SMM_TSEG),y) -ramstage-y += stage_cache.c -romstage-y += stage_cache.c -postcar-y += stage_cache.c +ramstage-y += tseg_region.c +romstage-y += tseg_region.c +postcar-y += tseg_region.c smmstub-y += smm_stub.S diff --git a/src/cpu/x86/smm/stage_cache.c b/src/cpu/x86/smm/stage_cache.c deleted file mode 100644 index 0a816ba732..0000000000 --- a/src/cpu/x86/smm/stage_cache.c +++ /dev/null @@ -1,33 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright 2013 Google Inc. - * - * 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 <console/console.h> -#include <cpu/x86/smm.h> -#include <stage_cache.h> -#include <types.h> - -int __weak smm_subregion(int sub, uintptr_t *base, size_t *size) -{ - return -1; -} - -void __weak stage_cache_external_region(void **base, size_t *size) -{ - if (smm_subregion(SMM_SUBREGION_CACHE, (uintptr_t *)base, size)) { - printk(BIOS_ERR, "ERROR: No cache SMM subregion.\n"); - *base = NULL; - *size = 0; - } -} diff --git a/src/cpu/x86/smm/tseg_region.c b/src/cpu/x86/smm/tseg_region.c new file mode 100644 index 0000000000..df9dea5c0f --- /dev/null +++ b/src/cpu/x86/smm/tseg_region.c @@ -0,0 +1,86 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2013 Google Inc. + * + * 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 <assert.h> +#include <commonlib/helpers.h> +#include <console/console.h> +#include <cpu/x86/smm.h> +#include <stage_cache.h> +#include <types.h> + +void __weak smm_region(uintptr_t *start, size_t *size) +{ + *start = 0; + *size = 0; +} + +/* + * Subregions within SMM + * +-------------------------+ + * | IED | IED_REGION_SIZE + * +-------------------------+ + * | External Stage Cache | SMM_RESERVED_SIZE + * +-------------------------+ + * | code and data | + * | (TSEG) | + * +-------------------------+ TSEG + */ +int smm_subregion(int sub, uintptr_t *start, size_t *size) +{ + uintptr_t sub_base; + size_t sub_size; + const size_t ied_size = CONFIG_IED_REGION_SIZE; + const size_t cache_size = CONFIG_SMM_RESERVED_SIZE; + + smm_region(&sub_base, &sub_size); + + ASSERT(IS_ALIGNED(sub_base, sub_size)); + ASSERT(sub_size > (cache_size + ied_size)); + + switch (sub) { + case SMM_SUBREGION_HANDLER: + /* Handler starts at the base of TSEG. */ + sub_size -= ied_size; + sub_size -= cache_size; + break; + case SMM_SUBREGION_CACHE: + /* External cache is in the middle of TSEG. */ + sub_base += sub_size - (ied_size + cache_size); + sub_size = cache_size; + break; + case SMM_SUBREGION_CHIPSET: + /* IED is at the top. */ + sub_base += sub_size - ied_size; + sub_size = ied_size; + break; + default: + *start = 0; + *size = 0; + return -1; + } + + *start = sub_base; + *size = sub_size; + return 0; +} + +void __weak stage_cache_external_region(void **base, size_t *size) +{ + if (smm_subregion(SMM_SUBREGION_CACHE, (uintptr_t *)base, size)) { + printk(BIOS_ERR, "ERROR: No cache SMM subregion.\n"); + *base = NULL; + *size = 0; + } +} |