| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* This file is part of the coreboot project. */ |
| |
| #include <cbmem.h> |
| #include <arch/io.h> |
| #include <arch/romstage.h> |
| #include "memory.h" |
| #include "fw_cfg.h" |
| |
| #define CMOS_ADDR_PORT 0x70 |
| #define CMOS_DATA_PORT 0x71 |
| |
| #define HIGH_RAM_ADDR 0x35 |
| #define LOW_RAM_ADDR 0x34 |
| |
| #define HIGH_HIGHRAM_ADDR 0x5d |
| #define MID_HIGHRAM_ADDR 0x5c |
| #define LOW_HIGHRAM_ADDR 0x5b |
| |
| unsigned long qemu_get_high_memory_size(void) |
| { |
| unsigned long high; |
| outb(HIGH_HIGHRAM_ADDR, CMOS_ADDR_PORT); |
| high = ((unsigned long) inb(CMOS_DATA_PORT)) << 22; |
| outb(MID_HIGHRAM_ADDR, CMOS_ADDR_PORT); |
| high |= ((unsigned long) inb(CMOS_DATA_PORT)) << 14; |
| outb(LOW_HIGHRAM_ADDR, CMOS_ADDR_PORT); |
| high |= ((unsigned long) inb(CMOS_DATA_PORT)) << 6; |
| return high; |
| } |
| |
| unsigned long qemu_get_memory_size(void) |
| { |
| unsigned long tomk; |
| outb(HIGH_RAM_ADDR, CMOS_ADDR_PORT); |
| tomk = ((unsigned long) inb(CMOS_DATA_PORT)) << 14; |
| outb(LOW_RAM_ADDR, CMOS_ADDR_PORT); |
| tomk |= ((unsigned long) inb(CMOS_DATA_PORT)) << 6; |
| tomk += 16 * 1024; |
| return tomk; |
| } |
| |
| void *cbmem_top_chipset(void) |
| { |
| uintptr_t top = 0; |
| |
| top = fw_cfg_tolud(); |
| if (!top) |
| top = (uintptr_t)qemu_get_memory_size() * 1024; |
| |
| return (void *)top; |
| } |
| |
| /* Nothing to do, MTRRs are no-op on QEMU. */ |
| void fill_postcar_frame(struct postcar_frame *pcf) |
| { |
| } |