1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * QEMU fw_cfg helpers (LoongArch specific)
5 * Copyright (C) 2021 Loongson Technology Corporation Limited
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"
14 static void fw_cfg_boot_set(void *opaque
, const char *boot_device
,
17 fw_cfg_modify_i16(opaque
, FW_CFG_BOOT_DEVICE
, boot_device
[0]);
20 FWCfgState
*loongarch_fw_cfg_init(ram_addr_t ram_size
, MachineState
*ms
)
23 int max_cpus
= ms
->smp
.max_cpus
;
24 int smp_cpus
= ms
->smp
.cpus
;
26 fw_cfg
= fw_cfg_init_mem_wide(VIRT_FWCFG_BASE
+ 8, VIRT_FWCFG_BASE
, 8,
27 VIRT_FWCFG_BASE
+ 16, &address_space_memory
);
28 fw_cfg_add_i16(fw_cfg
, FW_CFG_MAX_CPUS
, (uint16_t)max_cpus
);
29 fw_cfg_add_i64(fw_cfg
, FW_CFG_RAM_SIZE
, (uint64_t)ram_size
);
30 fw_cfg_add_i16(fw_cfg
, FW_CFG_NB_CPUS
, (uint16_t)smp_cpus
);
32 qemu_register_boot_set(fw_cfg_boot_set
, fw_cfg
);