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[PULL 18/21] hw/loongarch: Add linux kernel booting support
From: |
Richard Henderson |
Subject: |
[PULL 18/21] hw/loongarch: Add linux kernel booting support |
Date: |
Tue, 19 Jul 2022 23:29:57 +0530 |
From: Xiaojuan Yang <yangxiaojuan@loongson.cn>
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>
---
hw/loongarch/loongson3.c | 114 +++++++++++++++++++++++++++++++++------
1 file changed, 99 insertions(+), 15 deletions(-)
diff --git a/hw/loongarch/loongson3.c b/hw/loongarch/loongson3.c
index 3f1849b8b0..88e38ce17e 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);
}
--
2.34.1
- [PULL 08/21] fpu/softfloat: Add LoongArch specializations for pickNaN*, (continued)
- [PULL 08/21] fpu/softfloat: Add LoongArch specializations for pickNaN*, Richard Henderson, 2022/07/19
- [PULL 09/21] target/loongarch: Fix float_convd/float_convs test failing, Richard Henderson, 2022/07/19
- [PULL 11/21] tests/tcg/loongarch64: Add clo related instructions test, Richard Henderson, 2022/07/19
- [PULL 10/21] tests/tcg/loongarch64: Add float reference files, Richard Henderson, 2022/07/19
- [PULL 12/21] tests/tcg/loongarch64: Add div and mod related instructions test, Richard Henderson, 2022/07/19
- [PULL 13/21] tests/tcg/loongarch64: Add fclass test, Richard Henderson, 2022/07/19
- [PULL 14/21] tests/tcg/loongarch64: Add fp comparison instructions test, Richard Henderson, 2022/07/19
- [PULL 16/21] hw/loongarch: Add fw_cfg table support, Richard Henderson, 2022/07/19
- [PULL 17/21] hw/loongarch: Add uefi bios loading support, Richard Henderson, 2022/07/19
- [PULL 15/21] tests/tcg/loongarch64: Add pcadd related instructions test, Richard Henderson, 2022/07/19
- [PULL 18/21] hw/loongarch: Add linux kernel booting support,
Richard Henderson <=
- [PULL 19/21] hw/loongarch: Add smbios support, Richard Henderson, 2022/07/19
- [PULL 20/21] hw/loongarch: Add acpi ged support, Richard Henderson, 2022/07/19
- [PULL 21/21] hw/loongarch: Add fdt support, Richard Henderson, 2022/07/19
- Re: [PULL 00/21] loongarch patch queue, Peter Maydell, 2022/07/20