diff options
Diffstat (limited to 'src/northbridge/intel/sandybridge/raminit_shared.c')
| -rw-r--r-- | src/northbridge/intel/sandybridge/raminit_shared.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/src/northbridge/intel/sandybridge/raminit_shared.c b/src/northbridge/intel/sandybridge/raminit_shared.c new file mode 100644 index 0000000000..6162544bdc --- /dev/null +++ b/src/northbridge/intel/sandybridge/raminit_shared.c @@ -0,0 +1,68 @@ +/* + * This file is part of the coreboot project. + * + * 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 + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <console/console.h> +#include <device/mmio.h> +#include <types.h> + +#include "sandybridge.h" + +static const char *const ecc_decoder[] = { + "inactive", + "active on IO", + "disabled on IO", + "active", +}; + +#define ON_OFF(val) (((val) & 1) ? "on" : "off") + +/* Print the memory controller configuration as read from the memory controller registers. */ +void report_memory_config(void) +{ + u32 addr_decoder_common, addr_decode_ch[2]; + int i; + + addr_decoder_common = MCHBAR32(MAD_CHNL); + addr_decode_ch[0] = MCHBAR32(MAD_DIMM_CH0); + addr_decode_ch[1] = MCHBAR32(MAD_DIMM_CH1); + + const int refclk = MCHBAR32(MC_BIOS_REQ) & 0x100 ? 100 : 133; + + printk(BIOS_DEBUG, "memcfg DDR3 ref clock %d MHz\n", refclk); + printk(BIOS_DEBUG, "memcfg DDR3 clock %d MHz\n", + (MCHBAR32(MC_BIOS_DATA) * refclk * 100 * 2 + 50) / 100); + + printk(BIOS_DEBUG, "memcfg channel assignment: A: %d, B % d, C % d\n", + (addr_decoder_common >> 0) & 3, + (addr_decoder_common >> 2) & 3, + (addr_decoder_common >> 4) & 3); + + for (i = 0; i < ARRAY_SIZE(addr_decode_ch); i++) { + u32 ch_conf = addr_decode_ch[i]; + printk(BIOS_DEBUG, "memcfg channel[%d] config (%8.8x):\n", i, ch_conf); + printk(BIOS_DEBUG, " ECC %s\n", ecc_decoder[(ch_conf >> 24) & 3]); + printk(BIOS_DEBUG, " enhanced interleave mode %s\n", ON_OFF(ch_conf >> 22)); + printk(BIOS_DEBUG, " rank interleave %s\n", ON_OFF(ch_conf >> 21)); + printk(BIOS_DEBUG, " DIMMA %d MB width x%d %s rank%s\n", + ((ch_conf >> 0) & 0xff) * 256, + ((ch_conf >> 19) & 1) ? 16 : 8, + ((ch_conf >> 17) & 1) ? "dual" : "single", + ((ch_conf >> 16) & 1) ? "" : ", selected"); + printk(BIOS_DEBUG, " DIMMB %d MB width x%d %s rank%s\n", + ((ch_conf >> 8) & 0xff) * 256, + ((ch_conf >> 20) & 1) ? 16 : 8, + ((ch_conf >> 18) & 1) ? "dual" : "single", + ((ch_conf >> 16) & 1) ? ", selected" : ""); + } +} +#undef ON_OFF |