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powerpc/zImage: make the "OF" wrapper support ePAPR boot

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This makes the "OF" zImage wrapper (zImage.pseries, zImage.pmac,
zImage.maple) work if booted via a flat device-tree (ePAPR boot
mode), and thus potentially usable with kexec.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt 2013-09-24 16:10:38 +10:00
parent cbc9565ee8
commit 0c9fa29149
5 changed files with 33 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

16
arch/powerpc/boot/of.c
View file

@ -26,6 +26,9 @@
static unsigned long claim_base;
void epapr_platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7);
static void *of_try_claim(unsigned long size)
{
unsigned long addr = 0;
@ -61,7 +64,7 @@ static void of_image_hdr(const void *hdr)
}
}
void platform_init(unsigned long a1, unsigned long a2, void *promptr)
static void of_platform_init(unsigned long a1, unsigned long a2, void *promptr)
{
platform_ops.image_hdr = of_image_hdr;
platform_ops.malloc = of_try_claim;
@ -81,3 +84,14 @@ void platform_init(unsigned long a1, unsigned long a2, void *promptr)
loader_info.initrd_size = a2;
}
}
void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7)
{
/* Detect OF vs. ePAPR boot */
if (r5)
of_platform_init(r3, r4, (void *)r5);
else
epapr_platform_init(r3, r4, r5, r6, r7);
}