/* SPDX-License-Identifier: GPL-2.0-only */ #include <cbmem.h> #include <arch/io.h> #include <arch/romstage.h> #include <console/console.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) { printk(BIOS_WARNING, "QEMU: Falling back to RAM info in CMOS\n"); 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) { }