diff options
Diffstat (limited to 'src/soc/intel/apollolake/romstage.c')
| -rw-r--r-- | src/soc/intel/apollolake/romstage.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/src/soc/intel/apollolake/romstage.c b/src/soc/intel/apollolake/romstage.c new file mode 100644 index 0000000000..499417e2ec --- /dev/null +++ b/src/soc/intel/apollolake/romstage.c @@ -0,0 +1,155 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2015 Intel Corp. + * (Written by Alexandru Gagniuc <alexandrux.gagniuc@intel.com> for Intel Corp.) + * (Written by Andrey Petrov <andrey.petrov@intel.com> for Intel Corp.) + * + * 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; either version 2 of the License, or + * (at your option) any later version. + */ + +#include <arch/io.h> +#include <arch/symbols.h> +#include <cbfs.h> +#include <cbmem.h> +#include <console/console.h> +#include <device/pci_def.h> +#include <fsp/api.h> +#include <fsp/util.h> +#include <device/resource.h> +#include <string.h> +#include <soc/iomap.h> +#include <soc/pci_devs.h> +#include <soc/northbridge.h> +#include <soc/romstage.h> +#include <soc/uart.h> + +#define FIT_POINTER (0x100000000ULL - 0x40) + +/* + * Enables several BARs and devices which are needed for memory init + * - MCH_BASE_ADDR is needed in order to talk to the memory controller + * - PMC_BAR0 and PMC_BAR1 are used by FSP (with the base address hardcoded) + * Once raminit is done, we can safely let the allocator re-assign them + * - HPET is enabled because FSP wants to store a pointer to global data in the + * HPET comparator register + */ +static void soc_early_romstage_init(void) +{ + device_t pmc = PMC_DEV; + + /* Set MCH base address and enable bit */ + pci_write_config32(NB_DEV_ROOT, MCHBAR, MCH_BASE_ADDR | 1); + + /* Set PMC base address */ + pci_write_config32(pmc, PCI_BASE_ADDRESS_0, PMC_BAR0); + pci_write_config32(pmc, PCI_BASE_ADDRESS_1, 0); /* 64-bit BAR */ + pci_write_config32(pmc, PCI_BASE_ADDRESS_2, PMC_BAR1); + pci_write_config32(pmc, PCI_BASE_ADDRESS_3, 0); /* 64-bit BAR */ + + /* PMIO BAR4 was already set earlier, hence the COMMAND_IO below */ + pci_write_config32(pmc, PCI_COMMAND, + PCI_COMMAND_IO | PCI_COMMAND_MEMORY | + PCI_COMMAND_MASTER); + + /* Enable decoding for HPET. Needed for FSP global pointer storage */ + pci_write_config32(P2SB_DEV, 0x60, 1<<7); +} + +static void disable_watchdog(void) +{ + uint32_t reg; + device_t dev = PMC_DEV; + + /* Open up an IO window */ + pci_write_config16(dev, PCI_BASE_ADDRESS_4, ACPI_PMIO_BASE); + pci_write_config32(dev, PCI_COMMAND, + PCI_COMMAND_MASTER | PCI_COMMAND_IO); + + /* Stop TCO timer */ + reg = inl(ACPI_PMIO_BASE + 0x68); + reg |= 1 << 11; + outl(reg, ACPI_PMIO_BASE + 0x68); +} + + +asmlinkage void car_stage_entry(void) +{ + void *hob_list_ptr; + struct resource fsp_mem; + struct range_entry reg_car; + + printk(BIOS_DEBUG, "Starting romstage...\n"); + + disable_watchdog(); + + soc_early_romstage_init(); + + /* Make sure the blob does not override our data in CAR */ + memset(®_car, 0, sizeof(reg_car)); + reg_car.begin = (uintptr_t) _car_relocatable_data_end; + reg_car.end = (uintptr_t) _car_region_end; + + if (fsp_memory_init(&hob_list_ptr, ®_car) != FSP_SUCCESS) { + die("FSP memory init failed. Giving up."); + } + + fsp_find_reserved_memory(&fsp_mem, hob_list_ptr); + + /* initialize cbmem by adding FSP reserved memory first thing */ + cbmem_initialize_empty_id_size(CBMEM_ID_FSP_RESERVED_MEMORY, + fsp_mem.size); + + /* make sure FSP memory is reserved in cbmem */ + if (fsp_mem.base != (uintptr_t)cbmem_find(CBMEM_ID_FSP_RESERVED_MEMORY)) + die("Failed to accommodate FSP reserved memory request"); + + /* Now that CBMEM is up, save the list so ramstage can use it */ + fsp_save_hob_list(hob_list_ptr); + + run_ramstage(); +} + +static void fill_console_params(struct FSPM_UPD *mupd) +{ + if (IS_ENABLED(CONFIG_CONSOLE_SERIAL)) { + mupd->FspmConfig.SerialDebugPortDevice = CONFIG_UART_FOR_CONSOLE; + /* use MMIO port type */ + mupd->FspmConfig.SerialDebugPortType = 2; + /* use 4 byte register stride */ + mupd->FspmConfig.SerialDebugPortStrideSize = 2; + /* used only for port type set to external */ + mupd->FspmConfig.SerialDebugPortAddress = 0; + } else { + mupd->FspmConfig.SerialDebugPortType = 0; + } +} + +void platform_fsp_memory_init_params_cb(struct FSPM_UPD *mupd) +{ + fill_console_params(mupd); + mainboard_memory_init_params(mupd); + + /* Do NOT let FSP do any GPIO pad configuration */ + mupd->FspmConfig.GpioPadInitTablePtr = NULL; + /* + * At FIT_POINTER there is an address that points to FIT. Even though it + * is technically 64bit value we know only 32bit address is used. + */ + mupd->FspmConfig.FitTablePtr = read32((void*) FIT_POINTER); + /* Reserve enough memory under TOLUD to save CBMEM header */ + mupd->FspmArchUpd.BootLoaderTolumSize = cbmem_overhead_size(); + /* Let FSPM use memory right at the bottom of CAR */ + /* TODO: Add checks to see if we collide with other areas */ + mupd->FspmArchUpd.StackBase = _car_region_end - CONFIG_FSPM_STACK_SIZE; + mupd->FspmArchUpd.StackSize = CONFIG_FSPM_STACK_SIZE; +} + +__attribute__ ((weak)) +void mainboard_memory_init_params(struct FSPM_UPD *mupd) +{ + printk(BIOS_DEBUG, "WEAK: %s/%s called\n", __FILE__, __func__); +} |