99 lines
2.6 KiB
C
99 lines
2.6 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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
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*/
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#include <stdlib.h>
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#include <console/console.h>
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#include <cbmem.h>
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#include <arch/acpi.h>
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/* FIXME: Remove after CBMEM_INIT_HOOKS. */
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#include <cpu/x86/gdt.h>
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#include <console/cbmem_console.h>
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#include <timestamp.h>
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#if !CONFIG_DYNAMIC_CBMEM
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void get_cbmem_table(uint64_t *base, uint64_t *size)
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{
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uint64_t top_of_ram = get_top_of_ram();
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if (top_of_ram >= HIGH_MEMORY_SIZE) {
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*base = top_of_ram - HIGH_MEMORY_SIZE;
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*size = HIGH_MEMORY_SIZE;
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} else {
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*base = 0;
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*size = 0;
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}
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}
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#if !defined(__PRE_RAM__)
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void __attribute__((weak)) backup_top_of_ram(uint64_t ramtop)
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{
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/* Do nothing. Chipset may have implementation to save ramtop in NVRAM. */
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}
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/* This is for compatibility with old boards only. Any new chipset and board
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* must implement get_top_of_ram() for both romstage and ramstage to support
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* early features like COLLECT_TIMESTAMPS and CBMEM_CONSOLE.
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*/
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void set_top_of_ram(uint64_t ramtop)
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{
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backup_top_of_ram(ramtop);
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cbmem_late_set_table(ramtop - HIGH_MEMORY_SIZE, HIGH_MEMORY_SIZE);
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}
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#endif /* !__PRE_RAM__ */
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#if IS_ENABLED(CONFIG_LATE_CBMEM_INIT)
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unsigned long __attribute__((weak)) get_top_of_ram(void)
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{
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printk(BIOS_WARNING, "WARNING: you need to define get_top_of_ram() for your chipset\n");
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return 0;
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}
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#endif
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#else
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void *cbmem_top(void)
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{
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/* Top of cbmem is at lowest usable DRAM address below 4GiB. */
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return (void *)get_top_of_ram();
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}
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#endif /* DYNAMIC_CBMEM */
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void cbmem_run_init_hooks(void)
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{
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#if !defined(__PRE_RAM__)
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/* Relocate CBMEM console. */
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cbmemc_reinit();
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/* Relocate timestamps stash. */
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timestamp_reinit();
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move_gdt();
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#endif
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}
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/* Something went wrong, our high memory area got wiped */
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void cbmem_fail_resume(void)
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{
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#if !defined(__PRE_RAM__) && IS_ENABLED(CONFIG_HAVE_ACPI_RESUME)
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/* ACPI resume needs to be cleared in the fail-to-recover case, but that
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* condition is only handled during ramstage. */
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acpi_fail_wakeup();
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#endif
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}
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