qemu

FORK: QEMU emulator
git clone https://git.neptards.moe/neptards/qemu.git
Log | Files | Refs | Submodules | LICENSE

fw_cfg.c (1085B)

      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,
     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 }