From f08fa7a2018495c6f2a5eaba5f6d8fdcbc67e6c6 Mon Sep 17 00:00:00 2001 From: Gabe Black Date: Mon, 5 Dec 2011 12:09:25 +0000 Subject: [PATCH] x86: Add infrastructure to extract an e820 table from the coreboot tables Also approximate the size of RAM using the largest RAM address available in the tables. There may be areas which are marked as reserved which are actually at the end of RAM. Signed-off-by: Gabe Black --- arch/x86/cpu/coreboot/sdram.c | 38 +++++++++++++++++++++++++++++++++++++- 1 file changed, 37 insertions(+), 1 deletion(-) diff --git a/arch/x86/cpu/coreboot/sdram.c b/arch/x86/cpu/coreboot/sdram.c index b56085a..f8fdac6 100644 --- a/arch/x86/cpu/coreboot/sdram.c +++ b/arch/x86/cpu/coreboot/sdram.c @@ -23,13 +23,49 @@ */ #include +#include +#include #include +#include +#include +#include DECLARE_GLOBAL_DATA_PTR; +unsigned install_e820_map(unsigned max_entries, struct e820entry *entries) +{ + int i; + + unsigned num_entries = min(lib_sysinfo.n_memranges, max_entries); + if (num_entries < lib_sysinfo.n_memranges) { + printf("Warning: Limiting e820 map to %d entries.\n", + num_entries); + } + for (i = 0; i < num_entries; i++) { + struct memrange *memrange = &lib_sysinfo.memrange[i]; + + entries[i].addr = memrange->base; + entries[i].size = memrange->size; + entries[i].type = memrange->type; + } + return num_entries; +} + int dram_init_f(void) { - gd->ram_size = 64*1024*1024; + int i; + phys_size_t ram_size = 0; + + for (i = 0; i < lib_sysinfo.n_memranges; i++) { + struct memrange *memrange = &lib_sysinfo.memrange[i]; + unsigned long long end = memrange->base + memrange->size; + + if (memrange->type == CB_MEM_RAM && end > ram_size) + ram_size = end; + } + gd->ram_size = ram_size; + if (ram_size == 0) + return -1; return 0; } -- 2.7.4