[PATCH v3 04/17] hw/loongarch: Add init_cmdline

[Song Gao]

Add init_cmline and set boot_info->a0, a1

Signed-off-by: Song Gao <gaos...@loongson.cn>
---
 hw/loongarch/boot.c    | 20 ++++++++++++++++++++
 target/loongarch/cpu.h |  2 ++
 2 files changed, 22 insertions(+)

diff --git a/hw/loongarch/boot.c b/hw/loongarch/boot.c
index faff880153..27eae6f0cb 100644
--- a/hw/loongarch/boot.c
+++ b/hw/loongarch/boot.c
@@ -13,6 +13,7 @@
 #include "elf.h"
 #include "qemu/error-report.h"
 #include "sysemu/reset.h"
+#include <asm-generic/setup.h>
 
 static unsigned int slave_boot_code[] = {
                   /* Configure reset ebase.         */
@@ -62,6 +63,16 @@ static unsigned int slave_boot_code[] = {
     0x4c000020,   /* jirl       $r0,$r1,0           */
 };
 
+static void init_cmdline(struct loongarch_boot_info *info, void *p, void 
*start)
+{
+    hwaddr cmdline_addr = (hwaddr)p - (hwaddr)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 +132,10 @@ 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);
     }
 }
@@ -160,8 +175,13 @@ static void loongarch_firmware_boot(LoongArchMachineState 
*lams,
 
 static void init_boot_rom(struct loongarch_boot_info *info, void *p)
 {
+    void *start = p;
+
     memcpy(p, &slave_boot_code, sizeof(slave_boot_code));
     p += sizeof(slave_boot_code);
+
+    init_cmdline(info, p, start);
+    p += COMMAND_LINE_SIZE;
 }
 
 static void loongarch_direct_kernel_boot(struct loongarch_boot_info *info)
diff --git a/target/loongarch/cpu.h b/target/loongarch/cpu.h
index 00d1fba597..c7c695138e 100644
--- a/target/loongarch/cpu.h
+++ b/target/loongarch/cpu.h
@@ -362,6 +362,8 @@ typedef struct CPUArchState {
     uint64_t elf_address;
     /* Store ipistate to access from this struct */
     DeviceState *ipistate;
+
+    struct loongarch_boot_info *boot_info;
 #endif
 } CPULoongArchState;
 
-- 
2.25.1