| /* |
| * 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 <console/console.h> |
| #include <string.h> |
| #include <arch/hlt.h> |
| #include <arch/io.h> |
| #include <arch/romcc_io.h> |
| #include <cbmem.h> |
| #include <arch/cbfs.h> |
| #include <cbfs.h> |
| #include <ip_checksum.h> |
| #include <pc80/mc146818rtc.h> |
| #include <device/pci_def.h> |
| #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 <vendorcode/google/chromeos/chromeos.h> |
| #else |
| #define recovery_mode_enabled(x) 0 |
| #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 152 |
| #define CMOS_OFFSET_MRC_SEED_S3 156 |
| #define CMOS_OFFSET_MRC_SEED_CHK 160 |
| #endif |
| |
| 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); |
| } |
| |
| static void prepare_mrc_cache(struct pei_data *pei_data) |
| { |
| struct mrc_data_container *mrc_cache; |
| u16 c1, c2, checksum, seed_checksum; |
| |
| // 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; |
| } |
| |
| if ((mrc_cache = find_current_mrc_cache()) == NULL) { |
| /* error message printed in find_current_mrc_cache */ |
| 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, size %x checksum %04x\n", |
| __func__, pei_data->mrc_input, |
| pei_data->mrc_input_len, mrc_cache->mrc_checksum); |
| } |
| |
| 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; |
| unsigned long entry; |
| |
| report_platform_info(); |
| |
| /* 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; |
| |
| /* |
| * 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) { |
| printk(BIOS_DEBUG, "Giving up in sdram_initialize: No MRC data\n"); |
| outb(0x6, 0xcf9); |
| hlt(); |
| } |
| |
| /* Locate and call UEFI System Agent binary. */ |
| entry = (unsigned long)cbfs_find_file("mrc.bin", 0xab); |
| if (entry) { |
| int rv; |
| asm volatile ( |
| "call *%%ecx\n\t" |
| :"=a" (rv) : "c" (entry), "a" (pei_data)); |
| if (rv) { |
| switch (rv) { |
| case -1: |
| printk(BIOS_ERR, "PEI version mismatch.\n"); |
| break; |
| case -2: |
| printk(BIOS_ERR, "Invalid memory frequency.\n"); |
| break; |
| default: |
| printk(BIOS_ERR, "MRC returned %x.\n", rv); |
| } |
| die("Nonzero MRC return value.\n"); |
| } |
| } else { |
| die("UEFI PEI System Agent not found.\n"); |
| } |
| |
| #if CONFIG_USBDEBUG |
| /* mrc.bin reconfigures USB, so reinit it to have debug */ |
| early_usbdebug_init(); |
| #endif |
| |
| /* 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); |
| |
| /* Send ME init done for SandyBridge here. This is done |
| * inside the SystemAgent binary on IvyBridge. */ |
| if (BASE_REV_SNB == |
| (pci_read_config16(PCI_CPU_DEVICE, PCI_DEVICE_ID) & BASE_REV_MASK)) |
| intel_early_me_init_done(ME_INIT_STATUS_SUCCESS); |
| else |
| intel_early_me_status(); |
| |
| 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; |
| } |