diff options
Diffstat (limited to 'src/soc/intel/braswell/memmap.c')
| -rw-r--r-- | src/soc/intel/braswell/memmap.c | 60 |
1 files changed, 56 insertions, 4 deletions
diff --git a/src/soc/intel/braswell/memmap.c b/src/soc/intel/braswell/memmap.c index 110dc45aac..28156a360d 100644 --- a/src/soc/intel/braswell/memmap.c +++ b/src/soc/intel/braswell/memmap.c @@ -2,13 +2,14 @@ * This file is part of the coreboot project. * * Copyright (C) 2013 Google, Inc. + * Copyright (C) 2015 Intel Corp. * * 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 + * but WITHOUT ANY WARRANTY; without even the implied wacbmem_entryanty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * @@ -19,15 +20,66 @@ #include <arch/io.h> #include <cbmem.h> +#include <console/console.h> +#include <soc/intel/common/memmap.h> #include <soc/iosf.h> #include <soc/smm.h> -uintptr_t smm_region_start(void) +static size_t smm_region_size(void) { - return (iosf_bunit_read(BUNIT_SMRRL) << 20); + u32 smm_size; + smm_size = iosf_bunit_read(BUNIT_SMRRH) & 0xFFFF; + smm_size -= iosf_bunit_read(BUNIT_SMRRL) & 0xFFFF; + smm_size = (smm_size + 1) << 20; + return smm_size; +} + +void smm_region(void **start, size_t *size) +{ + *start = (void *)((iosf_bunit_read(BUNIT_SMRRL) & 0xFFFF) << 20); + *size = smm_region_size(); +} + +size_t mmap_region_granluarity(void) +{ + /* Align to TSEG size when SMM is in use, and 8MiB by default */ + return IS_ENABLED(CONFIG_HAVE_SMI_HANDLER) ? smm_region_size() + : 8 << 20; } void *cbmem_top(void) { - return (void *) smm_region_start(); + char *smm_base; + size_t smm_size; + + /* + * +-------------------------+ Top of RAM (aligned) + * | System Management Mode | + * | code and data | Length: CONFIG_TSEG_SIZE + * | (TSEG) | + * +-------------------------+ SMM base (aligned) + * | | + * | Chipset Reserved Memory | Length: Multiple of CONFIG_TSEG_SIZE + * | | + * +-------------------------+ top_of_ram (aligned) + * | | + * | CBMEM Root | + * | | + * +-------------------------+ + * | | + * | FSP Reserved Memory | + * | | + * +-------------------------+ + * | | + * | Various CBMEM Entries | + * | | + * +-------------------------+ top_of_stack (8 byte aligned) + * | | + * | stack (CBMEM Entry) | + * | | + * +-------------------------+ + */ + + smm_region((void **)&smm_base, &smm_size); + return (void *)(smm_base - CONFIG_CHIPSET_RESERVED_MEM_BYTES); } |