| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright 2015 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. |
| */ |
| |
| #include <arch/early_variables.h> |
| #include <console/console.h> |
| #include <cpu/x86/mtrr.h> |
| #include <fsp/car.h> |
| #include <fsp/util.h> |
| #include <program_loading.h> |
| #include <timestamp.h> |
| |
| FSP_INFO_HEADER *fih_car CAR_GLOBAL; |
| |
| /* Save FSP_INFO_HEADER for TempRamExit() call in assembly. */ |
| static inline void set_fih_car(FSP_INFO_HEADER *fih) |
| { |
| /* This variable is written in the raw form because it's only |
| * ever accessed in code that that has the cache-as-ram enabled. The |
| * assembly routine which tears down cache-as-ram utilizes this |
| * variable for determining where to find FSP. */ |
| fih_car = fih; |
| } |
| |
| asmlinkage void *cache_as_ram_main(struct cache_as_ram_params *car_params) |
| { |
| int i; |
| const int num_guards = 4; |
| const u32 stack_guard = 0xdeadbeef; |
| u32 *stack_base; |
| void *ram_stack; |
| u32 size; |
| |
| /* Size of unallocated CAR. */ |
| size = _car_region_end - _car_relocatable_data_end; |
| size = ALIGN_DOWN(size, 16); |
| |
| stack_base = (u32 *) (_car_region_end - size); |
| |
| for (i = 0; i < num_guards; i++) |
| stack_base[i] = stack_guard; |
| |
| /* Initialize timestamp book keeping only once. */ |
| timestamp_init(car_params->tsc); |
| |
| /* Call into pre-console init code then initialize console. */ |
| car_soc_pre_console_init(); |
| car_mainboard_pre_console_init(); |
| console_init(); |
| |
| printk(BIOS_DEBUG, "FSP TempRamInit successful\n"); |
| |
| printk(BIOS_SPEW, "bist: 0x%08x\n", car_params->bist); |
| printk(BIOS_SPEW, "tsc: 0x%016llx\n", car_params->tsc); |
| |
| display_mtrrs(); |
| |
| if (car_params->bootloader_car_start != CONFIG_DCACHE_RAM_BASE || |
| car_params->bootloader_car_end != |
| (CONFIG_DCACHE_RAM_BASE + CONFIG_DCACHE_RAM_SIZE)) { |
| printk(BIOS_INFO, "CAR mismatch: %08x--%08x vs %08lx--%08lx\n", |
| CONFIG_DCACHE_RAM_BASE, |
| CONFIG_DCACHE_RAM_BASE + CONFIG_DCACHE_RAM_SIZE, |
| (long)car_params->bootloader_car_start, |
| (long)car_params->bootloader_car_end); |
| } |
| |
| car_soc_post_console_init(); |
| car_mainboard_post_console_init(); |
| |
| set_fih_car(car_params->fih); |
| |
| /* Return new stack value in RAM back to assembly stub. */ |
| ram_stack = cache_as_ram_stage_main(car_params->fih); |
| |
| /* Check the stack. */ |
| for (i = 0; i < num_guards; i++) { |
| if (stack_base[i] == stack_guard) |
| continue; |
| printk(BIOS_DEBUG, "Smashed stack detected in romstage!\n"); |
| } |
| |
| return ram_stack; |
| } |
| |
| /* Entry point taken when romstage is called after a separate verstage. */ |
| asmlinkage void *romstage_c_entry(void) |
| { |
| /* Need to locate the current FSP_INFO_HEADER. The cache-as-ram |
| * is still enabled. We can directly access work buffer here. */ |
| FSP_INFO_HEADER *fih; |
| struct prog fsp = PROG_INIT(PROG_REFCODE, "fsp.bin"); |
| |
| console_init(); |
| |
| if (prog_locate(&fsp)) { |
| fih = NULL; |
| printk(BIOS_ERR, "Unable to locate %s\n", prog_name(&fsp)); |
| } else |
| /* This leaks a mapping which this code assumes is benign as |
| * the flash is memory mapped CPU's address space. */ |
| fih = find_fsp((uintptr_t)rdev_mmap_full(prog_rdev(&fsp))); |
| |
| set_fih_car(fih); |
| |
| /* Return new stack value in RAM back to assembly stub. */ |
| return cache_as_ram_stage_main(fih); |
| } |
| |
| asmlinkage void after_cache_as_ram(void *chipset_context) |
| { |
| timestamp_add_now(TS_FSP_TEMP_RAM_EXIT_END); |
| printk(BIOS_DEBUG, "FspTempRamExit returned successfully\n"); |
| display_mtrrs(); |
| |
| after_cache_as_ram_stage(); |
| } |
| |
| void __weak car_mainboard_pre_console_init(void) |
| { |
| } |
| |
| void __weak car_soc_pre_console_init(void) |
| { |
| } |
| |
| void __weak car_mainboard_post_console_init(void) |
| { |
| } |
| |
| void __weak car_soc_post_console_init(void) |
| { |
| } |