blob: f0a1257fb94192529d15b28bf18a424d2ed4f1a0 [file] [log] [blame]
/*
* This file is part of the coreboot project.
*
* 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 <cbmem.h>
#include <amdblocks/acpimmio.h>
#include <amdblocks/biosram.h>
void backup_top_of_low_cacheable(uintptr_t ramtop)
{
biosram_write32(BIOSRAM_CBMEM_TOP, ramtop);
}
uintptr_t restore_top_of_low_cacheable(void)
{
return biosram_read32(BIOSRAM_CBMEM_TOP);
}
void save_uma_size(uint32_t size)
{
biosram_write32(BIOSRAM_UMA_SIZE, size);
}
void save_uma_base(uint64_t base)
{
biosram_write32(BIOSRAM_UMA_BASE, (uint32_t) base);
biosram_write32(BIOSRAM_UMA_BASE + 4, (uint32_t) (base >> 32));
}
uint32_t get_uma_size(void)
{
return biosram_read32(BIOSRAM_UMA_SIZE);
}
uint64_t get_uma_base(void)
{
uint64_t base;
base = biosram_read32(BIOSRAM_UMA_BASE);
base |= ((uint64_t)(biosram_read32(BIOSRAM_UMA_BASE + 4)) << 32);
return base;
}