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/virt.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(VIRT_FWCFG_BASE + 8, VIRT_FWCFG_BASE, 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
@@ -28,13 +28,46 @@
#include "hw/pci-host/ls7a.h"
#include "hw/pci-host/gpex.h"
#include "hw/misc/unimp.h"
-
+#include "hw/loongarch/fw_cfg.h"
#include "target/loongarch/cpu.h"
#define PM_BASE 0x10080000
#define PM_SIZE 0x100
#define PM_CTRL 0x10
+struct memmap_entry {
+ uint64_t address;
+ uint64_t length;
+ uint32_t type;
+ uint32_t reserved;
+};
+
+static struct memmap_entry *memmap_table;
+static unsigned memmap_entries;
+
+static int memmap_add_entry(uint64_t address, uint64_t length, uint32_t type)
+{
+ int i;
+
+ for (i = 0; i < memmap_entries; i++) {
+ if (memmap_table[i].address == address) {
+ fprintf(stderr, "%s address:0x%lx length:0x%lx already exists\n",
+ __func__, address, length);
+ return 0;
+ }
+ }
+
+ memmap_table = g_renew(struct memmap_entry, memmap_table,
+ memmap_entries + 1);
+ memmap_table[memmap_entries].address = cpu_to_le64(address);
+ memmap_table[memmap_entries].length = cpu_to_le64(length);
+ memmap_table[memmap_entries].type = cpu_to_le32(type);
+ memmap_entries++;
+
+ return memmap_entries;
+}
+
+
/*
* This is a placeholder for missing ACPI,
* and will eventually be replaced.
@@ -331,15 +364,27 @@ static void loongarch_init(MachineState *machine)
machine->ram, 0, 256 * MiB);
memory_region_add_subregion(address_space_mem, offset, &lams->lowmem);
offset += 256 * MiB;
+ memmap_add_entry(0, 256 * MiB, 1);
highram_size = ram_size - 256 * MiB;
memory_region_init_alias(&lams->highmem, NULL, "loongarch.highmem",
machine->ram, offset, highram_size);
memory_region_add_subregion(address_space_mem, 0x90000000, &lams->highmem);
+ memmap_add_entry(0x90000000, highram_size, 1);
/* Add isa io region */
memory_region_init_alias(&lams->isa_io, NULL, "isa-io",
get_system_io(), 0, LOONGARCH_ISA_IO_SIZE);
memory_region_add_subregion(address_space_mem, LOONGARCH_ISA_IO_BASE,
&lams->isa_io);
+ /* fw_cfg init */
+ lams->fw_cfg = loongarch_fw_cfg_init(ram_size, machine);
+ rom_set_fw(lams->fw_cfg);
+
+ if (lams->fw_cfg != NULL) {
+ fw_cfg_add_file(lams->fw_cfg, "etc/memmap",
+ memmap_table,
+ sizeof(struct memmap_entry) * (memmap_entries));
+ }
+
if (kernel_filename) {
loaderparams.ram_size = ram_size;
loaderparams.kernel_filename = kernel_filename;
@@ -1,4 +1,7 @@
loongarch_ss = ss.source_set()
+loongarch_ss.add(files(
+ 'fw_cfg.c',
+))
loongarch_ss.add(when: 'CONFIG_LOONGARCH_VIRT', if_true: files('loongson3.c'))
hw_arch += {'loongarch': loongarch_ss}
@@ -17,6 +17,7 @@
#define LOONGARCH_ISA_IO_BASE 0x18000000UL
#define LOONGARCH_ISA_IO_SIZE 0x0004000
+#define VIRT_FWCFG_BASE 0x1e020000UL
struct LoongArchMachineState {
/*< private >*/
@@ -26,6 +27,8 @@ struct LoongArchMachineState {
MemoryRegion lowmem;
MemoryRegion highmem;
MemoryRegion isa_io;
+ /* State for other subsystems/APIs: */
+ FWCfgState *fw_cfg;
};
#define TYPE_LOONGARCH_MACHINE MACHINE_TYPE_NAME("virt")
Add fw_cfg table for loongarch virt machine, including memmap table. Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn> --- hw/loongarch/fw_cfg.c | 33 ++++++++++++++++++++++++++ hw/loongarch/fw_cfg.h | 15 ++++++++++++ hw/loongarch/loongson3.c | 47 ++++++++++++++++++++++++++++++++++++- hw/loongarch/meson.build | 3 +++ include/hw/loongarch/virt.h | 3 +++ 5 files changed, 100 insertions(+), 1 deletion(-) create mode 100644 hw/loongarch/fw_cfg.c create mode 100644 hw/loongarch/fw_cfg.h