| 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 "system/system.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 *virt_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_dma(VIRT_FWCFG_BASE, &address_space_memory); |
| 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 | } |