[Qemu-trivial] [PATCH v2] hw/sparc/leon3: Allow load of uImage firmwares

[Philippe Mathieu-Daudé]

Currently the Leon3 machine doesn't allow to load legacy u-boot images:

  $ qemu-system-sparc -M leon3_generic -d in_asm \
      -kernel HelenOS-0.6.0-sparc32-leon3.bin
  qemu-system-sparc: could not load kernel 'HelenOS-0.6.0-sparc32-leon3.bin'

  $ file HelenOS-0.6.0-sparc32-leon3.bin
  HelenOS-0.6.0-sparc32-leon3.bin: u-boot legacy uImage, HelenOS-0.6.0,\
    Linux/ARM, OS Kernel Image (Not compressed), 2424229 bytes,\
    Sun Dec 21 19:18:09 2014,\
    Load Address: 0x40000000, Entry Point: 0x40000000,\
    Header CRC: 0x8BCFA236, Data CRC: 0x37AD87DF

Since QEMU can load uImages, add the necessary code,
so the Leon3 machine can load these images:

  $ qemu-system-sparc -M leon3_generic -d in_asm \
      -kernel HelenOS-0.6.0-sparc32-leon3.bin
  ----------------
  IN:
  0x40000000:  b  0x400007a8
  0x40000004:  nop
  ----------------
  IN:
  0x400007a8:  save  %sp, -136, %sp
  0x400007ac:  call  0x40000020
  0x400007b0:  sethi  %hi(0x4000b800), %i1
  ...

Tested with the following firmware:
http://www.helenos.org/releases/HelenOS-0.6.0-sparc32-leon3.bin

Signed-off-by: Philippe Mathieu-Daudé <address@hidden>
---
v2: Fixed GIT_AUTHOR_EMAIL
---
 hw/sparc/leon3.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/hw/sparc/leon3.c b/hw/sparc/leon3.c
index 774639af33..0383b17c29 100644
--- a/hw/sparc/leon3.c
+++ b/hw/sparc/leon3.c
@@ -193,6 +193,10 @@ static void leon3_generic_hw_init(MachineState *machine)
         kernel_size = load_elf(kernel_filename, NULL, NULL, NULL,
                                &entry, NULL, NULL,
                                1 /* big endian */, EM_SPARC, 0, 0);
+        if (kernel_size < 0) {
+            kernel_size = load_uimage(kernel_filename, NULL, &entry,
+                                      NULL, NULL, NULL);
+        }
         if (kernel_size < 0) {
             error_report("could not load kernel '%s'", kernel_filename);
             exit(1);
-- 
2.19.1