[POWERPC] Fix BootX booting with an initrd

The bootx_init.c trampoline didn't properly add the ramdisk to the
"reserve map" (list of reserved areas of memory), thus causing all sorts
of failures when using BootX with an initrd. Also fixes a possible
problem if the ramdisk is located before the device-tree passed by
BootX.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 11 insertions, 4 deletions

diff --git a/arch/powerpc/platforms/powermac/bootx_init.c b/arch/powerpc/platforms/powermac/bootx_init.c
index 6a026c733f6..9d73d0234c5 100644
--- a/arch/powerpc/platforms/powermac/bootx_init.c
+++ b/arch/powerpc/platforms/powermac/bootx_init.c
@@ -411,8 +411,15 @@ static unsigned long __init bootx_flatten_dt(unsigned long start)
         DBG("End of boot params: %x\n", mem_end);
         rsvmap[0] = mem_start;
         rsvmap[1] = mem_end;
-        rsvmap[2] = 0;
-        rsvmap[3] = 0;
+        if (bootx_info->ramDisk) {
+                rsvmap[2] = ((unsigned long)bootx_info) + bootx_info->ramDisk;
+                rsvmap[3] = rsvmap[2] + bootx_info->ramDiskSize;
+                rsvmap[4] = 0;
+                rsvmap[5] = 0;
+        } else {
+                rsvmap[2] = 0;
+                rsvmap[3] = 0;
+        }
 
         return (unsigned long)hdr;
 }
@@ -543,12 +550,12 @@ void __init bootx_init(unsigned long r3, unsigned long r4)
          */
         if (bi->version < 5) {
                 space = bi->deviceTreeOffset + bi->deviceTreeSize;
-                if (bi->ramDisk)
+                if (bi->ramDisk >= space)
                         space = bi->ramDisk + bi->ramDiskSize;
         } else
                 space = bi->totalParamsSize;
 
-        bootx_printf("Total space used by parameters & ramdisk: %x \n", space);
+        bootx_printf("Total space used by parameters & ramdisk: 0x%x \n", space);
 
         /* New BootX will have flushed all TLBs and enters kernel with
          * MMU switched OFF, so this should not be useful anymore.