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hw/loongarch: Add init_cmdline 

Add init_cmline and set boot_info->a0, a1

Signed-off-by: Song Gao <gaosong@loongson.cn>
Reviewed-by: Bibo Mao <maobibo@loongson.cn>
Message-Id: <20240426091551.2397867-5-gaosong@loongson.cn>
This commit is contained in:
Song Gao 2024-04-26 17:15:38 +08:00
parent 7e0510d760
commit 58ee60d2d2
3 changed files with 34 additions and 0 deletions
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30
hw/loongarch/boot.c
View File

@ -63,6 +63,16 @@ static const unsigned int slave_boot_code[] = {
0x4c000020, /* jirl $zero, $ra,0 */
};
static void init_cmdline(struct loongarch_boot_info *info, void *p, void *start)
{
hwaddr cmdline_addr = p - start;
info->a0 = 1;
info->a1 = cmdline_addr;
memcpy(p, info->kernel_cmdline, COMMAND_LINE_SIZE);
}
static uint64_t cpu_loongarch_virt_to_phys(void *opaque, uint64_t addr)
{
return addr & MAKE_64BIT_MASK(0, TARGET_PHYS_ADDR_SPACE_BITS);
@ -121,6 +131,10 @@ static void reset_load_elf(void *opaque)
cpu_reset(CPU(cpu));
if (env->load_elf) {
if (cpu == LOONGARCH_CPU(first_cpu)) {
env->gpr[4] = env->boot_info->a0;
env->gpr[5] = env->boot_info->a1;
}
cpu_set_pc(CPU(cpu), env->elf_address);
}
}
@ -158,8 +172,17 @@ static void loongarch_firmware_boot(LoongArchMachineState *lams,
fw_cfg_add_kernel_info(info, lams->fw_cfg);
}
static void init_boot_rom(struct loongarch_boot_info *info, void *p)
{
void *start = p;
init_cmdline(info, p, start);
p += COMMAND_LINE_SIZE;
}
static void loongarch_direct_kernel_boot(struct loongarch_boot_info *info)
{
void *p, *bp;
int64_t kernel_addr = 0;
LoongArchCPU *lacpu;
CPUState *cs;
@ -173,6 +196,12 @@ static void loongarch_direct_kernel_boot(struct loongarch_boot_info *info)
}
}
/* Load cmdline and system tables at [0 - 1 MiB] */
p = g_malloc0(1 * MiB);
bp = p;
init_boot_rom(info, p);
rom_add_blob_fixed_as("boot_info", bp, 1 * MiB, 0, &address_space_memory);
/* Load slave boot code at pflash0 . */
void *boot_code = g_malloc0(VIRT_FLASH0_SIZE);
memcpy(boot_code, &slave_boot_code, sizeof(slave_boot_code));
@ -190,6 +219,7 @@ static void loongarch_direct_kernel_boot(struct loongarch_boot_info *info)
}
g_free(boot_code);
g_free(bp);
}
void loongarch_load_kernel(MachineState *ms, struct loongarch_boot_info *info)

2
include/hw/loongarch/virt.h
View File

@ -33,6 +33,8 @@
#define VIRT_GED_MEM_ADDR (VIRT_GED_EVT_ADDR + ACPI_GED_EVT_SEL_LEN)
#define VIRT_GED_REG_ADDR (VIRT_GED_MEM_ADDR + MEMORY_HOTPLUG_IO_LEN)
#define COMMAND_LINE_SIZE 512
struct LoongArchMachineState {
/*< private >*/
MachineState parent_obj;

2
target/loongarch/cpu.h
View File

@ -359,6 +359,8 @@ typedef struct CPUArchState {
uint32_t mp_state;
/* Store ipistate to access from this struct */
DeviceState *ipistate;
struct loongarch_boot_info *boot_info;
#endif
} CPULoongArchState;