qemu
1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3* QEMU fw_cfg helpers (LoongArch specific)
4*
5* Copyright (C) 2021 Loongson Technology Corporation Limited
6*/
7
8#include "qemu/osdep.h"9#include "hw/loongarch/fw_cfg.h"10#include "hw/loongarch/virt.h"11#include "hw/nvram/fw_cfg.h"12#include "sysemu/sysemu.h"13
14static void fw_cfg_boot_set(void *opaque, const char *boot_device,15Error **errp)16{
17fw_cfg_modify_i16(opaque, FW_CFG_BOOT_DEVICE, boot_device[0]);18}
19
20FWCfgState *virt_fw_cfg_init(ram_addr_t ram_size, MachineState *ms)21{
22FWCfgState *fw_cfg;23int max_cpus = ms->smp.max_cpus;24int smp_cpus = ms->smp.cpus;25
26fw_cfg = fw_cfg_init_mem_wide(VIRT_FWCFG_BASE + 8, VIRT_FWCFG_BASE, 8,27VIRT_FWCFG_BASE + 16, &address_space_memory);28fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, (uint16_t)max_cpus);29fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)ram_size);30fw_cfg_add_i16(fw_cfg, FW_CFG_NB_CPUS, (uint16_t)smp_cpus);31
32qemu_register_boot_set(fw_cfg_boot_set, fw_cfg);33return fw_cfg;34}
35