105 lines
2.7 KiB
C
105 lines
2.7 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <bootblock_common.h>
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#include <console/console.h>
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#include <cpu/intel/romstage.h>
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#include <cpu/x86/mtrr.h>
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#include <cpu/x86/smm.h>
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#include <arch/symbols.h>
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#include <commonlib/helpers.h>
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#include <program_loading.h>
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#include <timestamp.h>
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#define DCACHE_RAM_ROMSTAGE_STACK_SIZE 0x2000
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static struct postcar_frame early_mtrrs;
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/* prepare_and_run_postcar() determines the stack to use after
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* cache-as-ram is torn down as well as the MTRR settings to use. */
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static void prepare_and_run_postcar(struct postcar_frame *pcf)
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{
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if (postcar_frame_init(pcf, 0))
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die("Unable to initialize postcar frame.\n");
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fill_postcar_frame(pcf);
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postcar_frame_common_mtrrs(pcf);
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run_postcar_phase(pcf);
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/* We do not return here. */
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}
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static void romstage_main(unsigned long bist)
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{
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int i;
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const int num_guards = 4;
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const u32 stack_guard = 0xdeadbeef;
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u32 *stack_base;
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u32 size;
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/* Size of unallocated CAR. */
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size = ALIGN_DOWN(_car_stack_size, 16);
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size = MIN(size, DCACHE_RAM_ROMSTAGE_STACK_SIZE);
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if (size < DCACHE_RAM_ROMSTAGE_STACK_SIZE)
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printk(BIOS_DEBUG, "Romstage stack size limited to 0x%x!\n",
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size);
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stack_base = (u32 *) (_car_stack_end - size);
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for (i = 0; i < num_guards; i++)
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stack_base[i] = stack_guard;
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mainboard_romstage_entry(bist);
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/* Check the stack. */
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for (i = 0; i < num_guards; i++) {
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if (stack_base[i] == stack_guard)
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continue;
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printk(BIOS_DEBUG, "Smashed stack detected in romstage!\n");
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}
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if (CONFIG(SMM_TSEG))
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smm_list_regions();
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prepare_and_run_postcar(&early_mtrrs);
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/* We do not return here. */
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}
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#if !CONFIG(C_ENVIRONMENT_BOOTBLOCK)
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/* This wrapper enables easy transition towards C_ENVIRONMENT_BOOTBLOCK,
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* keeping changes in cache_as_ram.S easy to manage.
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*/
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asmlinkage void bootblock_c_entry_bist(uint64_t base_timestamp, uint32_t bist)
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{
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timestamp_init(base_timestamp);
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timestamp_add_now(TS_START_ROMSTAGE);
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romstage_main(bist);
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}
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#endif
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/* We don't carry BIST from bootblock in a good location to read from.
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* Any error should have been reported in bootblock already.
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*/
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#define NO_BIST 0
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asmlinkage void car_stage_entry(void)
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{
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/* Assumes the hardware was set up during the bootblock */
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console_init();
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romstage_main(NO_BIST);
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}
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