a7dd645594
AGESA and binaryPI boards have no easy way to determine correct cbmem_top() location early enough when GFXUMA is enabled, so they will use these functions with EARLY_CBMEM_INIT as well. At the end of AmdInitPost() the decisions of UMA base and size have not been written to hardware yet. The decisions are stored inside AGESA heap object we cannot locate from coreboot proper until after AmdInitEnv(). Modify code such that weak backup functions are only defined for LATE_CBMEM_INIT; they are somewhat troublesome to handle. Change-Id: Ifef4f75b36bc6dee6cd56d1d9164281d9b2a4f2a Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/19306 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
71 lines
1.7 KiB
C
71 lines
1.7 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 <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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#if IS_ENABLED(CONFIG_LATE_CBMEM_INIT)
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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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}
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unsigned long __attribute__((weak)) get_top_of_ram(void)
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{
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return 0;
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}
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#endif /* LATE_CBMEM_INIT */
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#if IS_ENABLED(CONFIG_CBMEM_TOP_BACKUP)
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static void *ramtop_pointer;
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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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if (ENV_RAMSTAGE)
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ramtop_pointer = (void *)(uintptr_t)ramtop;
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}
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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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uintptr_t ramtop;
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if (ENV_RAMSTAGE && ramtop_pointer != NULL)
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return ramtop_pointer;
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ramtop = get_top_of_ram();
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if (ENV_RAMSTAGE)
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ramtop_pointer = (void *)ramtop;
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return (void *)ramtop;
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}
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#endif /* CBMEM_TOP_BACKUP */
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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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