@@ -13,3 +13,7 @@ config LOONGSON3_LS7A
select LOONGARCH_PCH_MSI
select LOONGARCH_EXTIOI
select LS7A_RTC
+ select FW_CFG_LOONGARCH
+
+config FW_CFG_LOONGARCH
+ bool
new file mode 100644
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * QEMU fw_cfg helpers (LoongArch specific)
+ *
+ * Copyright (C) 2021 Loongson Technology Corporation Limited
+ */
+
+#include "qemu/osdep.h"
+#include "hw/loongarch/fw_cfg.h"
+#include "hw/loongarch/loongarch.h"
+#include "hw/nvram/fw_cfg.h"
+#include "sysemu/sysemu.h"
+
+static void fw_cfg_boot_set(void *opaque, const char *boot_device,
+ Error **errp)
+{
+ fw_cfg_modify_i16(opaque, FW_CFG_BOOT_DEVICE, boot_device[0]);
+}
+
+FWCfgState *loongarch_fw_cfg_init(ram_addr_t ram_size, MachineState *ms)
+{
+ FWCfgState *fw_cfg;
+ int max_cpus = ms->smp.max_cpus;
+ int smp_cpus = ms->smp.cpus;
+
+ fw_cfg = fw_cfg_init_mem_wide(FW_CFG_ADDR + 8, FW_CFG_ADDR, 8, 0, NULL);
+ fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, (uint16_t)max_cpus);
+ fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)ram_size);
+ fw_cfg_add_i16(fw_cfg, FW_CFG_NB_CPUS, (uint16_t)smp_cpus);
+
+ qemu_register_boot_set(fw_cfg_boot_set, fw_cfg);
+ return fw_cfg;
+}
new file mode 100644
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * QEMU fw_cfg helpers (LoongArch specific)
+ *
+ * Copyright (C) 2021 Loongson Technology Corporation Limited
+ */
+
+#ifndef HW_LOONGARCH_FW_CFG_H
+#define HW_LOONGARCH_FW_CFG_H
+
+#include "hw/boards.h"
+#include "hw/nvram/fw_cfg.h"
+
+FWCfgState *loongarch_fw_cfg_init(ram_addr_t ram_size, MachineState *ms);
+#endif
@@ -17,6 +17,8 @@
#include "sysemu/reset.h"
#include "hw/irq.h"
#include "net/net.h"
+#include "hw/loader.h"
+#include "elf.h"
#include "hw/loongarch/loongarch.h"
#include "hw/intc/loongarch_ipi.h"
#include "hw/intc/loongarch_extioi.h"
@@ -24,6 +26,9 @@
#include "hw/intc/loongarch_pch_msi.h"
#include "hw/pci-host/ls7a.h"
#include "hw/misc/unimp.h"
+#include "hw/loongarch/fw_cfg.h"
+
+#define LOONGSON3_BIOSNAME "loongarch_bios.bin"
static void loongarch_cpu_reset(void *opaque)
{
@@ -260,6 +265,8 @@ static void loongarch_init(MachineState *machine)
MemoryRegion *address_space_mem = get_system_memory();
LoongArchMachineState *lams = LOONGARCH_MACHINE(machine);
int i;
+ int bios_size;
+ char *filename;
if (!cpu_model) {
cpu_model = LOONGARCH_CPU_TYPE_NAME("Loongson-3A5000");
@@ -284,6 +291,11 @@ static void loongarch_init(MachineState *machine)
LOONGARCH_SIMPLE_MMIO_OPS(MISC_FUNC_REG, "loongarch_misc_func", 0x8, 3);
}
+ if (ram_size < 1 * GiB) {
+ error_report("ram_size must be greater than 1G due to the bios memory layout");
+ exit(1);
+ }
+
/* Add memory region */
memory_region_init_alias(&lams->lowmem, NULL, "loongarch.lowram",
machine->ram, 0, 256 * MiB);
@@ -302,6 +314,28 @@ static void loongarch_init(MachineState *machine)
memory_region_add_subregion(get_system_memory(), LOONGARCH_ISA_IO_BASE,
&lams->isa_io);
+ /* load the BIOS image. */
+ filename = qemu_find_file(QEMU_FILE_TYPE_BIOS,
+ machine->firmware ?: LOONGSON3_BIOSNAME);
+ if (filename) {
+ bios_size = load_image_targphys(filename, LA_BIOS_BASE, LA_BIOS_SIZE);
+ lams->fw_cfg = loongarch_fw_cfg_init(ram_size, machine);
+ rom_set_fw(lams->fw_cfg);
+ g_free(filename);
+ } else {
+ bios_size = -1;
+ }
+
+ if ((bios_size < 0 || bios_size > LA_BIOS_SIZE) && !qtest_enabled()) {
+ error_report("Could not load LOONGARCH bios '%s'", machine->firmware);
+ exit(1);
+ }
+
+ memory_region_init_ram(&lams->bios, NULL, "loongarch.bios",
+ LA_BIOS_SIZE, &error_fatal);
+ memory_region_set_readonly(&lams->bios, true);
+ memory_region_add_subregion(get_system_memory(), LA_BIOS_BASE, &lams->bios);
+
/* Initialize the IO interrupt subsystem */
loongarch_irq_init(lams);
}
@@ -317,6 +351,7 @@ static void loongarch_class_init(ObjectClass *oc, void *data)
mc->default_ram_id = "loongarch.ram";
mc->max_cpus = LOONGARCH_MAX_VCPUS;
mc->is_default = 1;
+ mc->default_machine_opts = "firmware=loongarch_bios.bin";
mc->default_kernel_irqchip_split = false;
mc->block_default_type = IF_VIRTIO;
mc->default_boot_order = "c";
@@ -1,4 +1,5 @@
loongarch_ss = ss.source_set()
loongarch_ss.add(when: 'CONFIG_LOONGSON3_LS7A', if_true: files('loongson3.c'))
+loongarch_ss.add(when: 'CONFIG_FW_CFG_LOONGARCH', if_true: files('fw_cfg.c'))
hw_arch += {'loongarch': loongarch_ss}
@@ -35,6 +35,10 @@
#define LOONGARCH_ISA_IO_BASE 0x18000000UL
#define LOONGARCH_ISA_IO_SIZE 0x0004000
+#define FW_CFG_ADDR 0x1e020000
+#define LA_BIOS_BASE 0x1c000000
+#define LA_BIOS_SIZE (4 * 1024 * 1024)
+
typedef struct LoongArchMachineState {
/*< private >*/
MachineState parent_obj;
@@ -42,6 +46,10 @@ typedef struct LoongArchMachineState {
MemoryRegion lowmem;
MemoryRegion highmem;
MemoryRegion isa_io;
+ MemoryRegion bios;
+
+ /* State for other subsystems/APIs: */
+ FWCfgState *fw_cfg;
} LoongArchMachineState;
#define TYPE_LOONGARCH_MACHINE MACHINE_TYPE_NAME("loongson3-ls7a")