LXR qemu/hw/loongarch/fw

   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
  14static 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
  20FWCfgState *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}
  35