diff options
Diffstat (limited to 'src/soc/intel/braswell/romstage/raminit.c')
| -rw-r--r-- | src/soc/intel/braswell/romstage/raminit.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/src/soc/intel/braswell/romstage/raminit.c b/src/soc/intel/braswell/romstage/raminit.c new file mode 100644 index 0000000000..61c122cd1d --- /dev/null +++ b/src/soc/intel/braswell/romstage/raminit.c @@ -0,0 +1,191 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2013 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 <stddef.h> +#include <arch/io.h> +#include <bootmode.h> +#include <cbfs.h> +#include <cbmem.h> +#include <console/console.h> +#include <device/pci_def.h> +#include <halt.h> +#include <stage_cache.h> +#include <soc/gpio.h> +#include <soc/intel/common/mrc_cache.h> +#include <soc/iomap.h> +#include <soc/iosf.h> +#include <soc/pci_devs.h> +#include <soc/reset.h> +#include <soc/romstage.h> +#include <ec/google/chromeec/ec.h> +#include <ec/google/chromeec/ec_commands.h> + +static void reset_system(void) +{ + warm_reset(); + halt(); +} + +static void enable_smbus(void) +{ + uint32_t reg; + const uint32_t smbus_dev = PCI_DEV(0, SMBUS_DEV, SMBUS_FUNC); + + /* SMBus I/O BAR */ + reg = SMBUS_BASE_ADDRESS | 2; + pci_write_config32(smbus_dev, PCI_BASE_ADDRESS_4, reg); + /* Enable decode of I/O space. */ + reg = pci_read_config16(smbus_dev, PCI_COMMAND); + reg |= 0x1; + pci_write_config16(smbus_dev, PCI_COMMAND, reg); + /* Enable Host Controller */ + reg = pci_read_config8(smbus_dev, 0x40); + reg |= 1; + pci_write_config8(smbus_dev, 0x40, reg); + + /* Configure pads to be used for SMBus */ + score_select_func(PCU_SMB_CLK_PAD, 1); + score_select_func(PCU_SMB_DATA_PAD, 1); +} + +static void ABI_X86 send_to_console(unsigned char b) +{ + do_putchar(b); +} + +static void print_dram_info(void) +{ + const int mrc_ver_reg = 0xf0; + const uint32_t soc_dev = PCI_DEV(0, SOC_DEV, SOC_FUNC); + uint32_t reg; + int num_channels; + int speed; + uint32_t ch0; + uint32_t ch1; + + reg = pci_read_config32(soc_dev, mrc_ver_reg); + + printk(BIOS_INFO, "MRC v%d.%02d\n", (reg >> 8) & 0xff, reg & 0xff); + + /* Number of channels enabled and DDR3 type. Determine number of + * channels by keying of the rank enable bits [3:0]. * */ + ch0 = iosf_dunit_ch0_read(DRP); + ch1 = iosf_dunit_ch1_read(DRP); + num_channels = 0; + if (ch0 & DRP_RANK_MASK) + num_channels++; + if (ch1 & DRP_RANK_MASK) + num_channels++; + + printk(BIOS_INFO, "%d channels of %sDDR3 @ ", num_channels, + (reg & (1 << 22)) ? "LP" : ""); + + /* DRAM frequency -- all channels run at same frequency. */ + reg = iosf_dunit_read(DTR0); + switch (reg & 0x3) { + case 0: + speed = 800; break; + case 1: + speed = 1066; break; + case 2: + speed = 1333; break; + case 3: + speed = 1600; break; + } + printk(BIOS_INFO, "%dMHz\n", speed); +} + +void raminit(struct mrc_params *mp, int prev_sleep_state) +{ + int ret; + mrc_wrapper_entry_t mrc_entry; + const struct mrc_saved_data *cache; + + /* Fill in default entries. */ + mp->version = MRC_PARAMS_VER; + mp->console_out = &send_to_console; + mp->prev_sleep_state = prev_sleep_state; + mp->rmt_enabled = IS_ENABLED(CONFIG_MRC_RMT); + + /* Default to 2GiB IO hole. */ + if (!mp->io_hole_mb) + mp->io_hole_mb = 2048; + + if (recovery_mode_enabled()) { + printk(BIOS_DEBUG, "Recovery mode: not using MRC cache.\n"); + } else if (!mrc_cache_get_current(&cache)) { + mp->saved_data_size = cache->size; + mp->saved_data = &cache->data[0]; + } else if (prev_sleep_state == 3) { + /* If waking from S3 and no cache then. */ + printk(BIOS_DEBUG, "No MRC cache found in S3 resume path.\n"); + post_code(POST_RESUME_FAILURE); + reset_system(); + } else { + printk(BIOS_DEBUG, "No MRC cache found.\n"); +#if CONFIG_EC_GOOGLE_CHROMEEC + if (prev_sleep_state == 0) { + /* Ensure EC is running RO firmware. */ + google_chromeec_check_ec_image(EC_IMAGE_RO); + } +#endif + } + + /* Determine if mrc.bin is in the cbfs. */ + if (cbfs_get_file_content(CBFS_DEFAULT_MEDIA, "mrc.bin", CBFS_TYPE_MRC, + NULL) == NULL) { + printk(BIOS_DEBUG, "Couldn't find mrc.bin\n"); + return; + } + + /* + * The entry point is currently the first instruction. Handle the + * case of an ELF file being put in the cbfs by setting the entry + * to the CONFIG_MRC_BIN_ADDRESS. + */ + mrc_entry = (void *)(uintptr_t)CONFIG_MRC_BIN_ADDRESS; + + if (mp->mainboard.dram_info_location == DRAM_INFO_SPD_SMBUS) + enable_smbus(); + + ret = mrc_entry(mp); + + print_dram_info(); + + if (prev_sleep_state != 3) { + cbmem_initialize_empty(); + stage_cache_create_empty(); + } else { + stage_cache_recover(); + if (cbmem_initialize()) { + #if CONFIG_HAVE_ACPI_RESUME + printk(BIOS_DEBUG, "Failed to recover CBMEM in S3 resume.\n"); + /* Failed S3 resume, reset to come up cleanly */ + reset_system(); + #endif + } + } + + printk(BIOS_DEBUG, "MRC Wrapper returned %d\n", ret); + printk(BIOS_DEBUG, "MRC data at %p %d bytes\n", mp->data_to_save, + mp->data_to_save_size); + + if (mp->data_to_save != NULL && mp->data_to_save_size > 0) + mrc_cache_stash_data(mp->data_to_save, mp->data_to_save_size); +} |