From 8216b46d7b9b88be4e31660362c4b9077670fd33 Mon Sep 17 00:00:00 2001 From: Jacob Garber Date: Wed, 29 May 2019 14:29:45 -0600 Subject: mb/{asrock,intel,purism}: Copy channel arrays separately DqByteMapCh0 and DqByteMapCh1 are declared adjacently in the FSP_M_CONFIG struct, so it is tempting to begin memcpy at the address of the first array and overwrite both of them at once. However, FSP_M_CONFIG is not declared with the packed attribute, so this is not guaranteed to work and is undefined behaviour to boot. It is cleaner and less tricky to copy them independently. The same is true for DqsMapCpu2DramCh0 and DqsMapCpu2DramCh1, so we change those as well. Change-Id: Ic6bb2bd5773af24329575926dbc70e0211f29051 Signed-off-by: Jacob Garber Found-by: Coverity CID 136538{8,9}, 140134{1,4} Reviewed-on: https://review.coreboot.org/c/coreboot/+/33135 Reviewed-by: Patrick Georgi Reviewed-by: Angel Pons Tested-by: build bot (Jenkins) --- src/mainboard/purism/librem_skl/romstage.c | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) (limited to 'src/mainboard/purism') diff --git a/src/mainboard/purism/librem_skl/romstage.c b/src/mainboard/purism/librem_skl/romstage.c index faf4090ae1..42003738c3 100644 --- a/src/mainboard/purism/librem_skl/romstage.c +++ b/src/mainboard/purism/librem_skl/romstage.c @@ -21,7 +21,7 @@ #include #include -static void mainboard_fill_dq_map_data(void *dq_map_ptr) +static void mainboard_fill_dq_map_data(void *dq_map_ch0, void *dq_map_ch1) { /* DQ byte map */ const u8 dq_map[2][12] = { @@ -29,16 +29,18 @@ static void mainboard_fill_dq_map_data(void *dq_map_ptr) 0x0F, 0x00, 0xFF, 0x00, 0xFF, 0x00 }, { 0x33, 0xCC, 0x00, 0xCC, 0x33, 0xCC, 0x33, 0x00, 0xFF, 0x00, 0xFF, 0x00 } }; - memcpy(dq_map_ptr, dq_map, sizeof(dq_map)); + memcpy(dq_map_ch0, dq_map[0], sizeof(dq_map[0])); + memcpy(dq_map_ch1, dq_map[1], sizeof(dq_map[1])); } -static void mainboard_fill_dqs_map_data(void *dqs_map_ptr) +static void mainboard_fill_dqs_map_data(void *dqs_map_ch0, void *dqs_map_ch1) { /* DQS CPU<>DRAM map */ const u8 dqs_map[2][8] = { { 0, 1, 3, 2, 4, 5, 6, 7 }, { 1, 0, 4, 5, 2, 3, 6, 7 } }; - memcpy(dqs_map_ptr, dqs_map, sizeof(dqs_map)); + memcpy(dqs_map_ch0, dqs_map[0], sizeof(dqs_map[0])); + memcpy(dqs_map_ch1, dqs_map[1], sizeof(dqs_map[1])); } static void mainboard_fill_rcomp_res_data(void *rcomp_ptr) @@ -68,8 +70,10 @@ void mainboard_memory_init_params(FSPM_UPD *mupd) dump_spd_info(&blk); assert(blk.spd_array[0][0] != 0); - mainboard_fill_dq_map_data(&mem_cfg->DqByteMapCh0); - mainboard_fill_dqs_map_data(&mem_cfg->DqsMapCpu2DramCh0); + mainboard_fill_dq_map_data(&mem_cfg->DqByteMapCh0, + &mem_cfg->DqByteMapCh1); + mainboard_fill_dqs_map_data(&mem_cfg->DqsMapCpu2DramCh0, + &mem_cfg->DqsMapCpu2DramCh1); mainboard_fill_rcomp_res_data(&mem_cfg->RcompResistor); mainboard_fill_rcomp_strength_data(&mem_cfg->RcompTarget); -- cgit v1.2.3