From ad63eabe3a35b32cbea47a20bd2f36510fb7a506 Mon Sep 17 00:00:00 2001 From: Xi Chen Date: Thu, 17 Feb 2022 16:48:52 +0800 Subject: src/mediatek/mt8186: Implement sdram_size() to get real dram size Originally, dram size is hard-coded to 4GB by default. To support different dram size, calculate it from the mem chip info stored in CBMEM. BUG=b:206014043 TEST=Output "dram size: 0x100000000" on Kingler Signed-off-by: Xi Chen Change-Id: I017e9d1a2d6e26f1fc21b67b5962dfb5c6ade8a5 Reviewed-on: https://review.coreboot.org/c/coreboot/+/62065 Tested-by: build bot (Jenkins) Reviewed-by: Yu-Ping Wu --- src/soc/mediatek/mt8186/emi.c | 21 ++++++++++++++++++++- 1 file changed, 20 insertions(+), 1 deletion(-) diff --git a/src/soc/mediatek/mt8186/emi.c b/src/soc/mediatek/mt8186/emi.c index 48a7b3ef07..6e2544185e 100644 --- a/src/soc/mediatek/mt8186/emi.c +++ b/src/soc/mediatek/mt8186/emi.c @@ -5,11 +5,30 @@ * Chapter number: 4.8 */ +#include +#include +#include #include size_t sdram_size(void) { - return (size_t)4 * GiB; + const struct mem_chip_info *mc; + size_t size = 0; + + if (ENV_ROMSTAGE) { + size = mtk_dram_size(); + printk(BIOS_INFO, "dram size (romstage): %#lx\n", size); + return size; + } + + mc = cbmem_find(CBMEM_ID_MEM_CHIP_INFO); + assert(mc); + + for (unsigned int i = 0; i < mc->num_channels; ++i) + size += mc->channel[i].density; + + printk(BIOS_INFO, "dram size: %#lx\n", size); + return size; } void mt_set_emi(struct dramc_param *dparam) -- cgit v1.2.3