[Qemu-devel] [RFC PATCH v4 1/3] use image_file_reset to reload initrd image

[Olivia Yin <hong-hua.yin@freescale.com>]

Signed-off-by: Olivia Yin <hong-hua.yin@freescale.com>
---
 hw/loader.c |   39 +++++++++++++++++++++++++++++++++++++++
 hw/loader.h |    7 +++++++
 2 files changed, 46 insertions(+), 0 deletions(-)

diff --git a/hw/loader.c b/hw/loader.c
index ba01ca6..a8a0a09 100644
--- a/hw/loader.c
+++ b/hw/loader.c
@@ -86,6 +86,39 @@ int load_image(const char *filename, uint8_t *addr)
     return size;
 }
 
+static void image_file_reset(void *opaque)
+{
+    ImageFile *image = opaque;
+    GError *err = NULL;
+    gboolean res;
+    gchar *content;
+    gsize size;
+
+    if(image->dir) {
+        const char *basename;
+        char fw_file_name[56];
+
+        basename = strrchr(image->name, '/');
+        if (basename) {
+            basename++;
+        } else {
+            basename = image->name;
+        }
+        snprintf(fw_file_name, sizeof(fw_file_name), "%s/%s", image->dir,
+                 basename);
+        image->name = g_strdup(fw_file_name);
+    }
+
+    res = g_file_get_contents(image->name, &content, &size, &err);
+    if (res == FALSE) {
+       error_report("failed to read image file: %s\n", image->name);
+       g_error_free(err);
+    } else {
+       cpu_physical_memory_write(image->addr, (uint8_t *)content, size);
+       g_free(content);
+    }
+}
+
 /* read()-like version */
 ssize_t read_targphys(const char *name,
                       int fd, hwaddr dst_addr, size_t nbytes)
@@ -113,6 +146,12 @@ int load_image_targphys(const char *filename,
     }
     if (size > 0) {
         rom_add_file_fixed(filename, addr, -1);
+        ImageFile *image;
+        image = g_malloc0(sizeof(*image));
+        image->name = g_strdup(filename);
+        image->addr = addr;
+ 
+        qemu_register_reset(image_file_reset, image);
     }
     return size;
 }
diff --git a/hw/loader.h b/hw/loader.h
index 26480ad..d021629 100644
--- a/hw/loader.h
+++ b/hw/loader.h
@@ -1,6 +1,13 @@
 #ifndef LOADER_H
 #define LOADER_H
 
+typedef struct ImageFile ImageFile;
+struct ImageFile {
+    char *name;
+    char *dir;
+    hwaddr addr;
+};
+
 /* loader.c */
 int get_image_size(const char *filename);
 int load_image(const char *filename, uint8_t *addr); /* deprecated */
-- 
1.7.1