diff options
Diffstat (limited to 'src/soc/intel/common/block/systemagent/memmap.c')
| -rw-r--r-- | src/soc/intel/common/block/systemagent/memmap.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/systemagent/memmap.c b/src/soc/intel/common/block/systemagent/memmap.c new file mode 100644 index 0000000000..ea22aa6d18 --- /dev/null +++ b/src/soc/intel/common/block/systemagent/memmap.c @@ -0,0 +1,48 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2014 Google Inc. + * Copyright (C) 2015-2017 Intel Corporation. + * + * 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/romstage.h> +#include <cbmem.h> +#include <console/console.h> +#include <cpu/x86/mtrr.h> +#include <cpu/x86/smm.h> +#include <intelblocks/systemagent.h> +#include <stdlib.h> + +void smm_region(uintptr_t *start, size_t *size) +{ + *start = sa_get_tseg_base(); + *size = sa_get_tseg_size(); +} + +void fill_postcar_frame(struct postcar_frame *pcf) +{ + uintptr_t top_of_ram; + + /* + * We need to make sure ramstage will be run cached. At this + * point exact location of ramstage in cbmem is not known. + * Instruct postcar to cache 16 megs under cbmem top which is + * a safe bet to cover ramstage. + */ + top_of_ram = (uintptr_t) cbmem_top(); + printk(BIOS_DEBUG, "top_of_ram = 0x%lx\n", top_of_ram); + top_of_ram -= 16*MiB; + postcar_frame_add_mtrr(pcf, top_of_ram, 16*MiB, MTRR_TYPE_WRBACK); + + /* Cache the TSEG region */ + postcar_enable_tseg_cache(pcf); +} |