| /* |
| * 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 <stdlib.h> |
| #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__ */ |