Sparc64: refactor kernel init

Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

hw/sun4u.c

@@ -148,6 +148,56 @@ static int sun4u_NVRAM_set_params (m48t59_t *nvram, uint16_t NVRAM_size,
 
     return 0;
 }
+static unsigned long sun4u_load_kernel(const char *kernel_filename,
+                                       const char *initrd_filename,
+                                       ram_addr_t RAM_size, long *initrd_size)
+{
+    int linux_boot;
+    unsigned int i;
+    long kernel_size;
+
+    linux_boot = (kernel_filename != NULL);
+
+    kernel_size = 0;
+    if (linux_boot) {
+        kernel_size = load_elf(kernel_filename, 0, NULL, NULL, NULL);
+        if (kernel_size < 0)
+            kernel_size = load_aout(kernel_filename, KERNEL_LOAD_ADDR,
+                                    RAM_size - KERNEL_LOAD_ADDR);
+        if (kernel_size < 0)
+            kernel_size = load_image_targphys(kernel_filename,
+                                              KERNEL_LOAD_ADDR,
+                                              RAM_size - KERNEL_LOAD_ADDR);
+        if (kernel_size < 0) {
+            fprintf(stderr, "qemu: could not load kernel '%s'\n",
+                    kernel_filename);
+            exit(1);
+        }
+
+        /* load initrd */
+        *initrd_size = 0;
+        if (initrd_filename) {
+            *initrd_size = load_image_targphys(initrd_filename,
+                                               INITRD_LOAD_ADDR,
+                                               RAM_size - INITRD_LOAD_ADDR);
+            if (*initrd_size < 0) {
+                fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
+                        initrd_filename);
+                exit(1);
+            }
+        }
+        if (*initrd_size > 0) {
+            for (i = 0; i < 64 * TARGET_PAGE_SIZE; i += TARGET_PAGE_SIZE) {
+                if (ldl_phys(KERNEL_LOAD_ADDR + i) == 0x48647253) { // HdrS
+                    stl_phys(KERNEL_LOAD_ADDR + i + 16, INITRD_LOAD_ADDR);
+                    stl_phys(KERNEL_LOAD_ADDR + i + 20, *initrd_size);
+                    break;
+                }
+            }
+        }
+    }
+    return kernel_size;
+}
 
 void pic_info(Monitor *mon)
 {
@@ -503,7 +553,6 @@ static void sun4uv_init(ram_addr_t RAM_size,
 {
     CPUState *env;
     m48t59_t *nvram;
-    int linux_boot;
     unsigned int i;
     long initrd_size, kernel_size;
     PCIBus *pci_bus, *pci_bus2, *pci_bus3;
@@ -513,8 +562,6 @@ static void sun4uv_init(ram_addr_t RAM_size,
     BlockDriverState *fd[MAX_FD];
     void *fw_cfg;
 
-    linux_boot = (kernel_filename != NULL);
-
     /* init CPUs */
     env = cpu_devinit(cpu_model, hwdef);
 
@@ -523,45 +570,6 @@ static void sun4uv_init(ram_addr_t RAM_size,
 
     prom_init(hwdef->prom_addr, bios_name);
 
-    kernel_size = 0;
-    initrd_size = 0;
-    if (linux_boot) {
-        /* XXX: put correct offset */
-        kernel_size = load_elf(kernel_filename, 0, NULL, NULL, NULL);
-        if (kernel_size < 0)
-            kernel_size = load_aout(kernel_filename, KERNEL_LOAD_ADDR,
-                                    ram_size - KERNEL_LOAD_ADDR);
-        if (kernel_size < 0)
-            kernel_size = load_image_targphys(kernel_filename,
-                                              KERNEL_LOAD_ADDR,
-                                              ram_size - KERNEL_LOAD_ADDR);
-        if (kernel_size < 0) {
-            fprintf(stderr, "qemu: could not load kernel '%s'\n",
-                    kernel_filename);
-            exit(1);
-        }
-
-        /* load initrd */
-        if (initrd_filename) {
-            initrd_size = load_image_targphys(initrd_filename,
-                                              INITRD_LOAD_ADDR,
-                                              ram_size - INITRD_LOAD_ADDR);
-            if (initrd_size < 0) {
-                fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
-                        initrd_filename);
-                exit(1);
-            }
-        }
-        if (initrd_size > 0) {
-            for (i = 0; i < 64 * TARGET_PAGE_SIZE; i += TARGET_PAGE_SIZE) {
-                if (ldl_phys(KERNEL_LOAD_ADDR + i) == 0x48647253) { // HdrS
-                    stl_phys(KERNEL_LOAD_ADDR + i + 16, INITRD_LOAD_ADDR);
-                    stl_phys(KERNEL_LOAD_ADDR + i + 20, initrd_size);
-                    break;
-                }
-            }
-        }
-    }
 
     irq = qemu_allocate_irqs(cpu_set_irq, env, MAX_PILS);
     pci_bus = pci_apb_init(APB_SPECIAL_BASE, APB_MEM_BASE, irq, &pci_bus2,
@@ -621,6 +629,11 @@ static void sun4uv_init(ram_addr_t RAM_size,
     }
     floppy_controller = fdctrl_init(NULL/*6*/, 2, 0, 0x3f0, fd);
     nvram = m48t59_init(NULL/*8*/, 0, 0x0074, NVRAM_SIZE, 59);
+
+    initrd_size = 0;
+    kernel_size = sun4u_load_kernel(kernel_filename, initrd_filename,
+                                    ram_size, &initrd_size);
+
     sun4u_NVRAM_set_params(nvram, NVRAM_SIZE, "Sun4u", RAM_size, boot_devices,
                            KERNEL_LOAD_ADDR, kernel_size,
                            kernel_cmdline,