Re: [Qemu-devel] [Qemu-ppc] [RFC PATCH v2 2/5] use reset handlers to reload kernel and initrd

[Alexander Graf]

On 29.10.2012, at 06:21, Olivia Yin wrote:

> Signed-off-by: Olivia Yin <address@hidden>
> ---
> hw/loader.c |   64 ++++++++++++++++++++++++++++++++++++++--------------------
> 1 files changed, 42 insertions(+), 22 deletions(-)
> 
> diff --git a/hw/loader.c b/hw/loader.c
> index cadf58f..9e2c3c8 100644
> --- a/hw/loader.c
> +++ b/hw/loader.c
> @@ -151,7 +151,12 @@ int load_image_targphys(const char *filename,
>         return -1;
>     }
>     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;
> }
> @@ -472,15 +477,14 @@ static ssize_t gunzip(void *dst, size_t dstlen, uint8_t 
> *src,
>     return dstbytes;
> }
> 
> -/* Load a U-Boot image.  */
> -int load_uimage(const char *filename, hwaddr *ep,
> -                hwaddr *loadaddr, int *is_linux)
> +/* write uimage into memory */
> +static int uimage_physical_loader(const char *filename, uint8_t **data,
> +                                  hwaddr *loadaddr)
> {
>     int fd;
>     int size;
>     uboot_image_header_t h;
>     uboot_image_header_t *hdr = &h;
> -    uint8_t *data = NULL;
>     int ret = -1;
> 
>     fd = open(filename, O_RDONLY | O_BINARY);
> @@ -513,18 +517,9 @@ int load_uimage(const char *filename, hwaddr *ep,
>         goto out;
>     }
> 
> -    /* TODO: Check CPU type.  */
> -    if (is_linux) {
> -        if (hdr->ih_os == IH_OS_LINUX)
> -            *is_linux = 1;
> -        else
> -            *is_linux = 0;
> -    }
> -
> -    *ep = hdr->ih_ep;
> -    data = g_malloc(hdr->ih_size);
> +    *data = g_malloc(hdr->ih_size);
> 
> -    if (read(fd, data, hdr->ih_size) != hdr->ih_size) {
> +    if (read(fd, *data, hdr->ih_size) != hdr->ih_size) {
>         fprintf(stderr, "Error reading file\n");
>         goto out;
>     }
> @@ -534,11 +529,11 @@ int load_uimage(const char *filename, hwaddr *ep,
>         size_t max_bytes;
>         ssize_t bytes;
> 
> -        compressed_data = data;
> +        compressed_data = *data;
>         max_bytes = UBOOT_MAX_GUNZIP_BYTES;
> -        data = g_malloc(max_bytes);
> +        *data = g_malloc(max_bytes);
> 
> -        bytes = gunzip(data, max_bytes, compressed_data, hdr->ih_size);
> +        bytes = gunzip(*data, max_bytes, compressed_data, hdr->ih_size);
>         g_free(compressed_data);
>         if (bytes < 0) {
>             fprintf(stderr, "Unable to decompress gzipped image!\n");
> @@ -547,7 +542,6 @@ int load_uimage(const char *filename, hwaddr *ep,
>         hdr->ih_size = bytes;
>     }
> 
> -    rom_add_blob_fixed(filename, data, hdr->ih_size, hdr->ih_load);
> 
>     if (loadaddr)
>         *loadaddr = hdr->ih_load;
> @@ -555,12 +549,38 @@ int load_uimage(const char *filename, hwaddr *ep,
>     ret = hdr->ih_size;
> 
> out:
> -    if (data)
> -        g_free(data);
>     close(fd);
>     return ret;
> }
> 
> +static void uimage_reset(void *opaque)
> +{
> +    ImageFile *image = opaque;
> +    uint8_t *data = NULL;
> +    int size;
> +
> +    size = uimage_physical_loader(image->name, &data, &image->addr);
> +    cpu_physical_memory_rw(image->addr, data, size, 1);
> +    g_free(data);
> +}
> +
> +/* Load a U-Boot image.  */
> +int load_uimage(const char *filename, hwaddr *ep,
> +                hwaddr *loadaddr, int *is_linux)

is_linux is never set.


Alex

> +{
> +    int size;
> +    ImageFile *image;
> +    uint8_t *data = NULL;
> +
> +    size= uimage_physical_loader(filename, &data, loadaddr);
> +    g_free(data);
> +    image = g_malloc0(sizeof(*image));
> +    image->name = g_strdup(filename);
> +    image->addr = *loadaddr;
> +    qemu_register_reset(uimage_reset, image);
> +    return size;
> +}
> +
> /*
>  * Functions for reboot-persistent memory regions.
>  *  - used for vga bios and option roms.
> -- 
> 1.7.1
> 
> 
>