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