X-Git-Url: http://wien.tomnetworks.com/gitweb/?p=coreboot.git;a=blobdiff_plain;f=src%2Fnorthbridge%2Fintel%2Fsandybridge%2Framinit.c;fp=src%2Fnorthbridge%2Fintel%2Fsandybridge%2Framinit.c;h=0da968d776e69a34ff318b1d974df26d1d3c574d;hp=0000000000000000000000000000000000000000;hb=00636b0daefc3c499990744226a0e1a316d71731;hpb=4dd3853437a3506880e2879e6640d455778f6413 diff --git a/src/northbridge/intel/sandybridge/raminit.c b/src/northbridge/intel/sandybridge/raminit.c new file mode 100644 index 000000000..0da968d77 --- /dev/null +++ b/src/northbridge/intel/sandybridge/raminit.c @@ -0,0 +1,383 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2011 Google Inc. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "raminit.h" +#include "pei_data.h" +#include "sandybridge.h" + +/* Management Engine is in the southbridge */ +#include "southbridge/intel/bd82x6x/me.h" +#if CONFIG_CHROMEOS +#include +#endif +#if 0 +#include +#endif + +/* + * MRC scrambler seed offsets should be reserved in + * mainboard cmos.layout and not covered by checksum. + */ +#if CONFIG_USE_OPTION_TABLE +#include "option_table.h" +#define CMOS_OFFSET_MRC_SEED (CMOS_VSTART_mrc_scrambler_seed >> 3) +#define CMOS_OFFSET_MRC_SEED_S3 (CMOS_VSTART_mrc_scrambler_seed_s3 >> 3) +#define CMOS_OFFSET_MRC_SEED_CHK (CMOS_VSTART_mrc_scrambler_seed_chk >> 3) +#else +#define CMOS_OFFSET_MRC_SEED 112 +#define CMOS_OFFSET_MRC_SEED_S3 116 +#define CMOS_OFFSET_MRC_SEED_CHK 120 +#endif + +#define MRC_DATA_ALIGN 0x1000 +#define MRC_DATA_SIGNATURE (('M'<<0)|('R'<<8)|('C'<<16)|('D'<<24)) + +struct mrc_data_container { + u32 mrc_signature; // "MRCD" + u32 mrc_data_size; // Actual total size of this structure + u32 mrc_checksum; // IP style checksum + u32 reserved; // For header alignment + u8 mrc_data[0]; // Variable size, platform/run time dependent. +} __attribute__ ((packed)); + +static void save_mrc_data(struct pei_data *pei_data) +{ + u16 c1, c2, checksum; + +#if CONFIG_EARLY_CBMEM_INIT + struct mrc_data_container *mrcdata; + int output_len = ALIGN(pei_data->mrc_output_len, 16); + + /* Save the MRC S3 restore data to cbmem */ + cbmem_initialize(); + mrcdata = cbmem_add + (CBMEM_ID_MRCDATA, + output_len + sizeof(struct mrc_data_container)); + + printk(BIOS_DEBUG, "Relocate MRC DATA from %p to %p (%u bytes)\n", + pei_data->mrc_output, mrcdata, output_len); + + mrcdata->mrc_signature = MRC_DATA_SIGNATURE; + mrcdata->mrc_data_size = output_len; + mrcdata->reserved = 0; + memcpy(mrcdata->mrc_data, pei_data->mrc_output, + pei_data->mrc_output_len); + + /* Zero the unused space in aligned buffer. */ + if (output_len > pei_data->mrc_output_len) + memset(mrcdata->mrc_data+pei_data->mrc_output_len, 0, + output_len - pei_data->mrc_output_len); + + mrcdata->mrc_checksum = compute_ip_checksum(mrcdata->mrc_data, + mrcdata->mrc_data_size); +#endif + + /* Save the MRC seed values to CMOS */ + cmos_write32(CMOS_OFFSET_MRC_SEED, pei_data->scrambler_seed); + printk(BIOS_DEBUG, "Save scrambler seed 0x%08x to CMOS 0x%02x\n", + pei_data->scrambler_seed, CMOS_OFFSET_MRC_SEED); + + cmos_write32(CMOS_OFFSET_MRC_SEED_S3, pei_data->scrambler_seed_s3); + printk(BIOS_DEBUG, "Save s3 scrambler seed 0x%08x to CMOS 0x%02x\n", + pei_data->scrambler_seed_s3, CMOS_OFFSET_MRC_SEED_S3); + + /* Save a simple checksum of the seed values */ + c1 = compute_ip_checksum((u8*)&pei_data->scrambler_seed, + sizeof(u32)); + c2 = compute_ip_checksum((u8*)&pei_data->scrambler_seed_s3, + sizeof(u32)); + checksum = add_ip_checksums(sizeof(u32), c1, c2); + + cmos_write(checksum & 0xff, CMOS_OFFSET_MRC_SEED_CHK); + cmos_write((checksum >> 8) & 0xff, CMOS_OFFSET_MRC_SEED_CHK+1); +} + +#if CONFIG_CHROMEOS +static void prepare_mrc_cache(struct pei_data *pei_data) +{ + const struct fdt_header *fdt_header; + const struct fdt_property *fdtp; + int offset, len; + const char *compatible = "chromeos,flashmap"; + const char *subnode = "rw-mrc-cache"; + const char *property = "reg"; + u32 *data; + struct mrc_data_container *mrc_cache, *mrc_next; + u8 *mrc_region, *region_ptr; + u16 c1, c2, checksum, seed_checksum; + u32 region_size, entry_id = 0; + u64 flashrom_base = 0; + + // preset just in case there is an error + pei_data->mrc_input = NULL; + pei_data->mrc_input_len = 0; + + /* Read scrambler seeds from CMOS */ + pei_data->scrambler_seed = cmos_read32(CMOS_OFFSET_MRC_SEED); + printk(BIOS_DEBUG, "Read scrambler seed 0x%08x from CMOS 0x%02x\n", + pei_data->scrambler_seed, CMOS_OFFSET_MRC_SEED); + + pei_data->scrambler_seed_s3 = cmos_read32(CMOS_OFFSET_MRC_SEED_S3); + printk(BIOS_DEBUG, "Read S3 scrambler seed 0x%08x from CMOS 0x%02x\n", + pei_data->scrambler_seed_s3, CMOS_OFFSET_MRC_SEED_S3); + + /* Compute seed checksum and compare */ + c1 = compute_ip_checksum((u8*)&pei_data->scrambler_seed, + sizeof(u32)); + c2 = compute_ip_checksum((u8*)&pei_data->scrambler_seed_s3, + sizeof(u32)); + checksum = add_ip_checksums(sizeof(u32), c1, c2); + + seed_checksum = cmos_read(CMOS_OFFSET_MRC_SEED_CHK); + seed_checksum |= cmos_read(CMOS_OFFSET_MRC_SEED_CHK+1) << 8; + + if (checksum != seed_checksum) { + printk(BIOS_ERR, "%s: invalid seed checksum\n", __func__); + pei_data->scrambler_seed = 0; + pei_data->scrambler_seed_s3 = 0; + return; + } + + fdt_header = cbfs_find_file(CONFIG_FDT_FILE_NAME, CBFS_TYPE_FDT); + + if (!fdt_header) { + printk(BIOS_ERR, "%s: no FDT found!\n", __func__); + return; + } + + offset = fdt_node_offset_by_compatible(fdt_header, 0, compatible); + if (offset < 0) { + printk(BIOS_ERR, "%s: no %s node found!\n", + __func__, compatible); + return; + } + + if (fdt_get_base_addr(fdt_header, offset, &flashrom_base) < 0) { + printk(BIOS_ERR, "%s: no base address in node name!\n", + __func__); + return; + } + + offset = fdt_subnode_offset(fdt_header, offset, subnode); + if (offset < 0) { + printk(BIOS_ERR, "%s: no %s found!\n", __func__, subnode); + return; + } + + fdtp = fdt_get_property(fdt_header, offset, property, &len); + if (!fdtp || (len != 8)) { + printk(BIOS_ERR, "%s: property %s at %p, len %d!\n", + __func__, property, fdtp, len); + return; + } + + data = (u32 *)fdtp->data; + + // Calculate actual address of the MRC cache in memory + region_size = fdt32_to_cpu(data[1]); + mrc_region = region_ptr = (u8*) + ((unsigned long)flashrom_base + fdt32_to_cpu(data[0])); + mrc_cache = mrc_next = (struct mrc_data_container *)mrc_region; + + if (!mrc_cache || mrc_cache->mrc_signature != MRC_DATA_SIGNATURE) { + printk(BIOS_ERR, "%s: invalid MRC data\n", __func__); + return; + } + + if (mrc_cache->mrc_data_size == -1UL) { + printk(BIOS_ERR, "%s: MRC cache not initialized?\n", __func__); + return; + } else { + /* MRC data blocks are aligned within the region */ + u32 mrc_size = sizeof(*mrc_cache) + mrc_cache->mrc_data_size; + if (mrc_size & (MRC_DATA_ALIGN - 1UL)) { + mrc_size &= ~(MRC_DATA_ALIGN - 1UL); + mrc_size += MRC_DATA_ALIGN; + } + + /* Search for the last filled entry in the region */ + while (mrc_next && + mrc_next->mrc_signature == MRC_DATA_SIGNATURE) { + entry_id++; + mrc_cache = mrc_next; + /* Stay in the mrcdata region defined in fdt */ + if ((entry_id * mrc_size) > region_size) + break; + region_ptr += mrc_size; + mrc_next = (struct mrc_data_container *)region_ptr; + } + entry_id--; + } + + /* Verify checksum */ + if (mrc_cache->mrc_checksum != + compute_ip_checksum(mrc_cache->mrc_data, + mrc_cache->mrc_data_size)) { + printk(BIOS_ERR, "%s: MRC cache checksum mismatch\n", __func__); + return; + } + + pei_data->mrc_input = mrc_cache->mrc_data; + pei_data->mrc_input_len = mrc_cache->mrc_data_size; + + printk(BIOS_DEBUG, "%s: at %p, entry %u size %x checksum %04x\n", + __func__, pei_data->mrc_input, entry_id, + pei_data->mrc_input_len, mrc_cache->mrc_checksum); +} +#endif + +static const char* ecc_decoder[] = { + "inactive", + "active on IO", + "disabled on IO", + "active" +}; + +/* + * Dump in the log memory controller configuration as read from the memory + * controller registers. + */ +static void report_memory_config(void) +{ + u32 addr_decoder_common, addr_decode_ch[2]; + int i; + + addr_decoder_common = MCHBAR32(0x5000); + addr_decode_ch[0] = MCHBAR32(0x5004); + addr_decode_ch[1] = MCHBAR32(0x5008); + + printk(BIOS_DEBUG, "memcfg DDR3 clock %d MHz\n", + (MCHBAR32(0x5e04) * 13333 * 2 + 50)/100); + printk(BIOS_DEBUG, "memcfg channel assignment: A: %d, B % d, C % d\n", + addr_decoder_common & 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", + ((ch_conf >> 22) & 1) ? "on" : "off"); + printk(BIOS_DEBUG, " rank interleave %s\n", + ((ch_conf >> 21) & 1) ? "on" : "off"); + 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" : ""); + } +} + +/** + * Find PEI executable in coreboot filesystem and execute it. + * + * @param pei_data: configuration data for UEFI PEI reference code + */ +void sdram_initialize(struct pei_data *pei_data) +{ + struct sys_info sysinfo; + const char *target = "mrc.bin"; + unsigned long entry; + + /* Wait for ME to be ready */ + intel_early_me_init(); + intel_early_me_uma_size(); + + printk(BIOS_DEBUG, "Starting UEFI PEI System Agent\n"); + + memset(&sysinfo, 0, sizeof(sysinfo)); + + sysinfo.boot_path = pei_data->boot_mode; + +#if CONFIG_CHROMEOS + /* + * Do not pass MRC data in for recovery mode boot, + * Always pass it in for S3 resume. + */ + if (!recovery_mode_enabled() || pei_data->boot_mode == 2) + prepare_mrc_cache(pei_data); + + /* If MRC data is not found we cannot continue S3 resume. */ + if (pei_data->boot_mode == 2 && !pei_data->mrc_input) { + outb(0x6, 0xcf9); + hlt(); + } +#endif + + /* Locate and call UEFI System Agent binary. */ + entry = (unsigned long)cbfs_find_file(target, 0xab); + if (entry) { + int rv; + asm volatile ( + "call *%%ecx\n\t" + :"=a" (rv) : "c" (entry), "a" (pei_data)); + if (rv) { + printk(BIOS_ERR, "MRC returned %d\n", rv); + die("Nonzero MRC return value\n"); + } + } else { + die("UEFI PEI System Agent not found.\n"); + } + + /* For reference print the System Agent version + * after executing the UEFI PEI stage. + */ + u32 version = MCHBAR32(0x5034); + printk(BIOS_DEBUG, "System Agent Version %d.%d.%d Build %d\n", + version >> 24 , (version >> 16) & 0xff, + (version >> 8) & 0xff, version & 0xff); + + intel_early_me_init_done(ME_INIT_STATUS_SUCCESS); + + report_memory_config(); + + /* S3 resume: don't save scrambler seed or MRC data */ + if (pei_data->boot_mode != 2) + save_mrc_data(pei_data); +} + +struct cbmem_entry *get_cbmem_toc(void) +{ + return (struct cbmem_entry *)(get_top_of_ram() - HIGH_MEMORY_SIZE); +} + +unsigned long get_top_of_ram(void) +{ + /* Base of TSEG is top of usable DRAM */ + u32 tom = pci_read_config32(PCI_DEV(0,0,0), TSEG); + return (unsigned long) tom; +}