From ed1694157c4f14d4ce60e7c053ea044aca6777fb Mon Sep 17 00:00:00 2001 From: Subrata Banik Date: Thu, 19 Oct 2017 16:40:14 +0530 Subject: soc/intel/cannonlake: Use EBDA structure to store soc reserve memory size Avoid calling calculate_dram_base() function to get chipset reserved memory size during pci resource allocation. Rather use EBDA to store chipset reserved memory size while calling cbmem_top_int(). This patch avoids one extra calculate_dram_base() call. BRANCH=none BUG=b:63974384 TEST=Ensures DRAM based resource allocation has taken care of Intel SoC reserved ranges. Change-Id: I2771ea55253ca7d16cd2e2951889ab092b47a9b1 Signed-off-by: Subrata Banik Reviewed-on: https://review.coreboot.org/22099 Reviewed-by: Aaron Durbin Tested-by: build bot (Jenkins) --- src/soc/intel/cannonlake/include/soc/ebda.h | 1 + src/soc/intel/cannonlake/memmap.c | 7 ++++--- 2 files changed, 5 insertions(+), 3 deletions(-) (limited to 'src/soc/intel/cannonlake') diff --git a/src/soc/intel/cannonlake/include/soc/ebda.h b/src/soc/intel/cannonlake/include/soc/ebda.h index 4cde5c0106..15a9d28a91 100644 --- a/src/soc/intel/cannonlake/include/soc/ebda.h +++ b/src/soc/intel/cannonlake/include/soc/ebda.h @@ -19,6 +19,7 @@ struct ebda_config { uint32_t signature; /* 0x00 - EBDA signature */ uint32_t tolum_base; /* 0x04 - coreboot memory start */ + uint32_t reserved_mem_size; /* 0x08 - chipset reserved memory size */ }; #endif diff --git a/src/soc/intel/cannonlake/memmap.c b/src/soc/intel/cannonlake/memmap.c index 8cf74c5585..0636b08abe 100644 --- a/src/soc/intel/cannonlake/memmap.c +++ b/src/soc/intel/cannonlake/memmap.c @@ -263,12 +263,12 @@ static uintptr_t calculate_dram_base(size_t *reserved_mem_size) */ size_t soc_reserved_mmio_size(void) { - size_t chipset_mem_size; + struct ebda_config cfg; - calculate_dram_base(&chipset_mem_size); + retrieve_ebda_object(&cfg); /* Get Intel Reserved Memory Range Size */ - return chipset_mem_size; + return cfg.reserved_mem_size; } /* Fill up memory layout information */ @@ -277,6 +277,7 @@ void fill_soc_memmap_ebda(struct ebda_config *cfg) size_t chipset_mem_size; cfg->tolum_base = calculate_dram_base(&chipset_mem_size); + cfg->reserved_mem_size = chipset_mem_size; } void cbmem_top_init(void) -- cgit v1.2.3