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
fw_cfg_boot_set(void * opaque,const char * boot_device,Error ** errp)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
virt_fw_cfg_init(ram_addr_t ram_size,MachineState * ms)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_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);
31
32 qemu_register_boot_set(fw_cfg_boot_set, fw_cfg);
33 return fw_cfg;
34 }
35