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 14 static void fw_cfg_boot_set(void *opaque, const char *boot_device, 15 Error **errp) 16 { 17 fw_cfg_modify_i16(opaque, FW_CFG_BOOT_DEVICE, boot_device[0]); 18 } 19 20 FWCfgState *loongarch_fw_cfg_init(ram_addr_t ram_size, MachineState *ms) 21 { 22 FWCfgState *fw_cfg; 23 int max_cpus = ms->smp.max_cpus; 24 int smp_cpus = ms->smp.cpus; 25 26 fw_cfg = fw_cfg_init_mem_wide(VIRT_FWCFG_BASE + 8, VIRT_FWCFG_BASE, 8, 0, NULL); 27 fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, (uint16_t)max_cpus); 28 fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)ram_size); 29 fw_cfg_add_i16(fw_cfg, FW_CFG_NB_CPUS, (uint16_t)smp_cpus); 30 31 qemu_register_boot_set(fw_cfg_boot_set, fw_cfg); 32 return fw_cfg; 33 } 34