cris: Break out image loading to hw/cris-boot.c.

Signed-off-by: Edgar E. Iglesias <edgar.iglesias@axis.com>

Makefile.target

@@ -233,7 +233,10 @@ obj-microblaze-y += xilinx_ethlite.o
 obj-microblaze-$(CONFIG_FDT) += device_tree.o
 
 # Boards
-obj-cris-y = cris_pic_cpu.o etraxfs.o axis_dev88.o
+obj-cris-y = cris_pic_cpu.o
+obj-cris-y += cris-boot.o
+obj-cris-y += etraxfs.o axis_dev88.o
+obj-cris-y += axis_dev88.o
 
 # IO blocks
 obj-cris-y += etraxfs_dma.o

hw/axis_dev88.c

@@ -30,6 +30,7 @@
 #include "etraxfs.h"
 #include "loader.h"
 #include "elf.h"
+#include "cris-boot.h"
 
 #define D(x)
 #define DNAND(x)
@@ -240,28 +241,7 @@ static CPUWriteMemoryFunc * const gpio_write[] = {
 
 #define INTMEM_SIZE (128 * 1024)
 
-static struct {
-    uint32_t bootstrap_pc;
-    uint32_t regs[16];
-} loadargs;
-
-static void main_cpu_reset(void *opaque)
-{
-    int i;
-
-    CPUState *env = opaque;
-    cpu_reset(env);
-
-    env->pc = loadargs.bootstrap_pc;
-    for (i = 0; i < 16; i++) {
-        env->regs[i] = loadargs.regs[i];
-    }
-}
-
-static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
-{
-    return addr - 0x80000000LL;
-}
+static struct cris_load_info li;
 
 static
 void axisdev88_init (ram_addr_t ram_size,
@@ -275,7 +255,6 @@ void axisdev88_init (ram_addr_t ram_size,
     qemu_irq irq[30], nmi[2], *cpu_irq;
     void *etraxfs_dmac;
     struct etraxfs_dma_client *eth[2] = {NULL, NULL};
-    int kernel_size;
     int i;
     int nand_regs;
     int gpio_regs;
@@ -287,7 +266,6 @@ void axisdev88_init (ram_addr_t ram_size,
         cpu_model = "crisv32";
     }
     env = cpu_init(cpu_model);
-    qemu_register_reset(main_cpu_reset, env);
 
     /* allocate RAM */
     phys_ram = qemu_ram_alloc(ram_size);
@@ -353,35 +331,14 @@ void axisdev88_init (ram_addr_t ram_size,
                              irq[0x14 + i]);
     }
 
-    if (kernel_filename) {
-        uint64_t entry, high;
-        int kcmdline_len;
-
-        /* Boots a kernel elf binary, os/linux-2.6/vmlinux from the axis 
-           devboard SDK.  */
-        kernel_size = load_elf(kernel_filename, translate_kernel_address, NULL,
-                               &entry, NULL, &high, 0, ELF_MACHINE, 0);
-        loadargs.bootstrap_pc = entry;
-        if (kernel_size < 0) {
-            /* Takes a kimage from the axis devboard SDK.  */
-            kernel_size = load_image_targphys(kernel_filename, 0x40004000,
-                                              ram_size);
-            loadargs.bootstrap_pc = 0x40004000;
-            loadargs.regs[9] = 0x40004000 + kernel_size;
-        }
-        loadargs.regs[8] = 0x56902387; /* RAM init magic.  */
-
-        if (kernel_cmdline && (kcmdline_len = strlen(kernel_cmdline))) {
-            if (kcmdline_len > 256) {
-                fprintf(stderr, "Too long CRIS kernel cmdline (max 256)\n");
-                exit(1);
-            }
-            /* Let the kernel know we are modifying the cmdline.  */
-            loadargs.regs[10] = 0x87109563;
-            loadargs.regs[11] = 0x40000000;
-            pstrcpy_targphys("cmdline", loadargs.regs[11], 256, kernel_cmdline);
-        }
+    if (!kernel_filename) {
+        fprintf(stderr, "Kernel image must be specified\n");
+        exit(1);
     }
+
+    li.image_filename = kernel_filename;
+    li.cmdline = kernel_cmdline;
+    cris_load_image(env, &li);
 }
 
 static QEMUMachine axisdev88_machine = {

hw/cris-boot.c

+/*
+ * CRIS image loading.
+ *
+ * Copyright (c) 2010 Edgar E. Iglesias, Axis Communications AB.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "hw.h"
+#include "sysemu.h"
+#include "loader.h"
+#include "elf.h"
+#include "cris-boot.h"
+
+static void main_cpu_reset(void *opaque)
+{
+    CPUState *env = opaque;
+    struct cris_load_info *li;
+
+    li = env->load_info;
+
+    cpu_reset(env);
+
+    if (!li) {
+        /* nothing more to do.  */
+        return;
+    }
+
+    env->pc = li->entry;
+
+    if (li->image_filename) {
+        env->regs[8] = 0x56902387; /* RAM boot magic.  */
+        env->regs[9] = 0x40004000 + li->image_size;
+    }
+
+    if (li->cmdline) {
+        /* Let the kernel know we are modifying the cmdline.  */
+        env->regs[10] = 0x87109563;
+        env->regs[11] = 0x40000000;
+    }
+}
+
+static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
+{
+    return addr - 0x80000000LL;
+}
+
+void cris_load_image(CPUState *env, struct cris_load_info *li)
+{
+    uint64_t entry, high;
+    int kcmdline_len;
+    int image_size;
+
+    env->load_info = li;
+    /* Boots a kernel elf binary, os/linux-2.6/vmlinux from the axis 
+       devboard SDK.  */
+    image_size = load_elf(li->image_filename, translate_kernel_address, NULL,
+                          &entry, NULL, &high, 0, ELF_MACHINE, 0);
+    li->entry = entry;
+    if (image_size < 0) {
+        /* Takes a kimage from the axis devboard SDK.  */
+        image_size = load_image_targphys(li->image_filename, 0x40004000,
+                                         ram_size);
+        li->entry = 0x40004000;
+    }
+
+    if (image_size < 0) {
+        fprintf(stderr, "qemu: could not load kernel '%s'\n",
+                li->image_filename);
+        exit(1);
+    }
+
+    if (li->cmdline && (kcmdline_len = strlen(li->cmdline))) {
+        if (kcmdline_len > 256) {
+            fprintf(stderr, "Too long CRIS kernel cmdline (max 256)\n");
+            exit(1);
+        }
+        pstrcpy_targphys("cmdline", 0x40000000, 256, li->cmdline);
+    }
+    qemu_register_reset(main_cpu_reset, env);
+}

hw/cris-boot.h

+
+struct cris_load_info
+{
+    const char *image_filename;
+    const char *cmdline;
+    int image_size;
+
+    target_phys_addr_t entry;
+};
+
+void cris_load_image(CPUState *env, struct cris_load_info *li);

hw/etraxfs.c

@@ -30,23 +30,17 @@
 #include "etraxfs.h"
 #include "loader.h"
 #include "elf.h"
+#include "cris-boot.h"
 
 #define FLASH_SIZE 0x2000000
 #define INTMEM_SIZE (128 * 1024)
 
-static uint32_t bootstrap_pc;
+static struct cris_load_info li;
 
-static void main_cpu_reset(void *opaque)
+static void flash_cpu_reset(void *opaque)
 {
     CPUState *env = opaque;
     cpu_reset(env);
-
-    env->pc = bootstrap_pc;
-}
-
-static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
-{
-    return addr - 0x80000000LL;
 }
 
 static
@@ -61,7 +55,6 @@ void bareetraxfs_init (ram_addr_t ram_size,
     qemu_irq irq[30], nmi[2], *cpu_irq; 
     void *etraxfs_dmac;
     struct etraxfs_dma_client *eth[2] = {NULL, NULL};
-    int kernel_size;
     DriveInfo *dinfo;
     int i;
     ram_addr_t phys_ram;
@@ -73,7 +66,6 @@ void bareetraxfs_init (ram_addr_t ram_size,
         cpu_model = "crisv32";
     }
     env = cpu_init(cpu_model);
-    qemu_register_reset(main_cpu_reset, env);
 
     /* allocate RAM */
     phys_ram = qemu_ram_alloc(ram_size);
@@ -137,38 +129,19 @@ void bareetraxfs_init (ram_addr_t ram_size,
     }
 
     if (kernel_filename) {
-        uint64_t entry, high;
-        int kcmdline_len;
-
-        /* Boots a kernel elf binary, os/linux-2.6/vmlinux from the axis 
-           devboard SDK.  */
-        kernel_size = load_elf(kernel_filename, translate_kernel_address, NULL,
-                               &entry, NULL, &high, 0, ELF_MACHINE, 0);
-        bootstrap_pc = entry;
-        if (kernel_size < 0) {
-            /* Takes a kimage from the axis devboard SDK.  */
-            kernel_size = load_image_targphys(kernel_filename, 0x40004000,
-                                              ram_size);
-            bootstrap_pc = 0x40004000;
-            env->regs[9] = 0x40004000 + kernel_size;
+        li.image_filename = kernel_filename;
+        li.cmdline = kernel_cmdline;
+        cris_load_image(env, &li);
+    } else {
+        if (!dinfo) {
+            fprintf(stderr,
+                    "Provide a kernel image or a flash image to boot from.\n");
+           exit(1);
         }
-        env->regs[8] = 0x56902387; /* RAM init magic.  */
-
-        if (kernel_cmdline && (kcmdline_len = strlen(kernel_cmdline))) {
-            if (kcmdline_len > 256) {
-                fprintf(stderr, "Too long CRIS kernel cmdline (max 256)\n");
-                exit(1);
-            }
-            /* Let the kernel know we are modifying the cmdline.  */
-            env->regs[10] = 0x87109563;
-            env->regs[11] = 0x40000000;
-            pstrcpy_targphys("cmdline", env->regs[11], 256, kernel_cmdline);
-        }
-    }
-    env->pc = bootstrap_pc;
 
-    printf ("pc =%x\n", env->pc);
-    printf ("ram size =%ld\n", ram_size);
+        /* Nothing more to do for flash images, those boot from addr 0.  */
+        qemu_register_reset(flash_cpu_reset, env);
+    }
 }
 
 static QEMUMachine bareetraxfs_machine = {

target-cris/cpu.h

@@ -155,6 +155,8 @@ typedef struct CPUCRISState {
 		uint32_t lo;
 	} tlbsets[2][4][16];
 
+	void *load_info;
+
 	CPU_COMMON
 } CPUCRISState;