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author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2014-12-22 12:28:07 +0200 |
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committer | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2015-01-27 22:48:06 +0100 |
commit | f1e3c763b3eef15dbfae73f485408a0dec230d00 (patch) | |
tree | 28682b0d4ad36063b3612c8a774af868a3e55878 /src/soc/intel/fsp_baytrail/memmap.c | |
parent | 91fac61240612291f7be3362f7acad31803e8b03 (diff) |
CBMEM: Do not use get_top_of_ram() with DYNAMIC_CBMEM
The name was always obscure and confusing. Instead define cbmem_top()
directly in the chipset code for x86 like on ARMs.
TODO: Check TSEG alignment, it used for MTRR programming.
Change-Id: Ibbe5f05ab9c7d87d09caa673766cd17d192cd045
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/7888
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@google.com>
Diffstat (limited to 'src/soc/intel/fsp_baytrail/memmap.c')
-rw-r--r-- | src/soc/intel/fsp_baytrail/memmap.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/src/soc/intel/fsp_baytrail/memmap.c b/src/soc/intel/fsp_baytrail/memmap.c index 83858b89a8..615916b96d 100644 --- a/src/soc/intel/fsp_baytrail/memmap.c +++ b/src/soc/intel/fsp_baytrail/memmap.c @@ -2,6 +2,7 @@ * This file is part of the coreboot project. * * Copyright (C) 2013 Google, Inc. + * Copyright (C) 2014 Sage Electronic Engineering, LLC. * * 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 @@ -21,8 +22,25 @@ #include <cbmem.h> #include <baytrail/iosf.h> #include <baytrail/smm.h> +#include <drivers/intel/fsp/fsp_util.h> -void *smm_region_start(void) +uintptr_t smm_region_start(void) { - return (void *)(iosf_bunit_read(BUNIT_SMRRL) << 20); + return (iosf_bunit_read(BUNIT_SMRRL) << 20); +} + +/* + * Calculate the top of usable (low) DRAM. + * The FSP's reserved memory sits just below the SMM region, + * allowing calculation of the top of usable memory. + * + * The entire memory map is shown in northcluster.c + */ + +void *cbmem_top(void) +{ + uintptr_t tom = smm_region_start(); + if (!tom) + tom = iosf_bunit_read(BUNIT_BMBOUND); + return (void *) tom - FSP_RESERVE_MEMORY_SIZE; } |