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authorXiaojuan Yang <yangxiaojuan@loongson.cn>2022-07-12 16:32:03 +0800
committerRichard Henderson <richard.henderson@linaro.org>2022-07-19 22:55:10 +0530
commitfb1cd3a2925ee3479b1a82adb2df967952a94300 (patch)
tree5340f828fe2a0eccfc8077e91ebd7f8b16f26d65 /hw/loongarch
parent98afb0d4e95322d728375a1171a5f77a9eeb4d68 (diff)
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hw/loongarch: Add linux kernel booting support
There are two situations to start system by kernel file. If exists bios option, system will boot from loaded bios file, else system will boot from hardcoded auxcode, and jump to kernel elf entry. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn> Message-Id: <20220712083206.4187715-4-yangxiaojuan@loongson.cn> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'hw/loongarch')
-rw-r--r--hw/loongarch/loongson3.c114
1 files changed, 99 insertions, 15 deletions
diff --git a/hw/loongarch/loongson3.c b/hw/loongarch/loongson3.c
index 3f1849b..88e38ce 100644
--- a/hw/loongarch/loongson3.c
+++ b/hw/loongarch/loongson3.c
@@ -103,6 +103,8 @@ static const MemoryRegionOps loongarch_virt_pm_ops = {
static struct _loaderparams {
uint64_t ram_size;
const char *kernel_filename;
+ const char *kernel_cmdline;
+ const char *initrd_filename;
} loaderparams;
static uint64_t cpu_loongarch_virt_to_phys(void *opaque, uint64_t addr)
@@ -352,18 +354,97 @@ static void reset_load_elf(void *opaque)
}
}
+/* Load an image file into an fw_cfg entry identified by key. */
+static void load_image_to_fw_cfg(FWCfgState *fw_cfg, uint16_t size_key,
+ uint16_t data_key, const char *image_name,
+ bool try_decompress)
+{
+ size_t size = -1;
+ uint8_t *data;
+
+ if (image_name == NULL) {
+ return;
+ }
+
+ if (try_decompress) {
+ size = load_image_gzipped_buffer(image_name,
+ LOAD_IMAGE_MAX_GUNZIP_BYTES, &data);
+ }
+
+ if (size == (size_t)-1) {
+ gchar *contents;
+ gsize length;
+
+ if (!g_file_get_contents(image_name, &contents, &length, NULL)) {
+ error_report("failed to load \"%s\"", image_name);
+ exit(1);
+ }
+ size = length;
+ data = (uint8_t *)contents;
+ }
+
+ fw_cfg_add_i32(fw_cfg, size_key, size);
+ fw_cfg_add_bytes(fw_cfg, data_key, data, size);
+}
+
+static void fw_cfg_add_kernel_info(FWCfgState *fw_cfg)
+{
+ /*
+ * Expose the kernel, the command line, and the initrd in fw_cfg.
+ * We don't process them here at all, it's all left to the
+ * firmware.
+ */
+ load_image_to_fw_cfg(fw_cfg,
+ FW_CFG_KERNEL_SIZE, FW_CFG_KERNEL_DATA,
+ loaderparams.kernel_filename,
+ false);
+
+ if (loaderparams.initrd_filename) {
+ load_image_to_fw_cfg(fw_cfg,
+ FW_CFG_INITRD_SIZE, FW_CFG_INITRD_DATA,
+ loaderparams.initrd_filename, false);
+ }
+
+ if (loaderparams.kernel_cmdline) {
+ fw_cfg_add_i32(fw_cfg, FW_CFG_CMDLINE_SIZE,
+ strlen(loaderparams.kernel_cmdline) + 1);
+ fw_cfg_add_string(fw_cfg, FW_CFG_CMDLINE_DATA,
+ loaderparams.kernel_cmdline);
+ }
+}
+
+static void loongarch_firmware_boot(LoongArchMachineState *lams)
+{
+ fw_cfg_add_kernel_info(lams->fw_cfg);
+}
+
+static void loongarch_direct_kernel_boot(LoongArchMachineState *lams)
+{
+ MachineState *machine = MACHINE(lams);
+ int64_t kernel_addr = 0;
+ LoongArchCPU *lacpu;
+ int i;
+
+ kernel_addr = load_kernel_info();
+ if (!machine->firmware) {
+ for (i = 0; i < machine->smp.cpus; i++) {
+ lacpu = LOONGARCH_CPU(qemu_get_cpu(i));
+ lacpu->env.load_elf = true;
+ lacpu->env.elf_address = kernel_addr;
+ }
+ }
+}
+
static void loongarch_init(MachineState *machine)
{
+ LoongArchCPU *lacpu;
const char *cpu_model = machine->cpu_type;
- const char *kernel_filename = machine->kernel_filename;
ram_addr_t offset = 0;
ram_addr_t ram_size = machine->ram_size;
uint64_t highram_size = 0;
MemoryRegion *address_space_mem = get_system_memory();
LoongArchMachineState *lams = LOONGARCH_MACHINE(machine);
- LoongArchCPU *lacpu;
int i;
- int64_t kernel_addr = 0;
if (!cpu_model) {
cpu_model = LOONGARCH_CPU_TYPE_NAME("la464");
@@ -412,20 +493,23 @@ static void loongarch_init(MachineState *machine)
memmap_table,
sizeof(struct memmap_entry) * (memmap_entries));
}
-
- if (kernel_filename) {
- loaderparams.ram_size = ram_size;
- loaderparams.kernel_filename = kernel_filename;
- kernel_addr = load_kernel_info();
- if (!machine->firmware) {
- for (i = 0; i < machine->smp.cpus; i++) {
- lacpu = LOONGARCH_CPU(qemu_get_cpu(i));
- lacpu->env.load_elf = true;
- lacpu->env.elf_address = kernel_addr;
- qemu_register_reset(reset_load_elf, lacpu);
- }
+ loaderparams.ram_size = ram_size;
+ loaderparams.kernel_filename = machine->kernel_filename;
+ loaderparams.kernel_cmdline = machine->kernel_cmdline;
+ loaderparams.initrd_filename = machine->initrd_filename;
+ /* load the kernel. */
+ if (loaderparams.kernel_filename) {
+ if (lams->bios_loaded) {
+ loongarch_firmware_boot(lams);
+ } else {
+ loongarch_direct_kernel_boot(lams);
}
}
+ /* register reset function */
+ for (i = 0; i < machine->smp.cpus; i++) {
+ lacpu = LOONGARCH_CPU(qemu_get_cpu(i));
+ qemu_register_reset(reset_load_elf, lacpu);
+ }
/* Initialize the IO interrupt subsystem */
loongarch_irq_init(lams);
}