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Commit 0c9fa291 authored by Benjamin Herrenschmidt's avatar Benjamin Herrenschmidt
Browse files

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



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: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent cbc9565e

arch/powerpc/boot/Makefile

+2 −2
Original line number Diff line number Diff line
@@ -74,7 +74,7 @@ src-wlib-$(CONFIG_8xx) += mpc8xx.c planetcore.c 
src-wlib-$(CONFIG_PPC_82xx) += pq2.c fsl-soc.c planetcore.c

src-wlib-$(CONFIG_EMBEDDED6xx) += mv64x60.c mv64x60_i2c.c ugecon.c



src-plat-y := of.c

src-plat-y := of.c epapr.c

src-plat-$(CONFIG_40x) += fixed-head.S ep405.c cuboot-hotfoot.c \

				treeboot-walnut.c cuboot-acadia.c \

				cuboot-kilauea.c simpleboot.c \
@@ -97,7 +97,7 @@ src-plat-$(CONFIG_EMBEDDED6xx) += cuboot-pq2.c cuboot-mpc7448hpc2.c \ 
					prpmc2800.c

src-plat-$(CONFIG_AMIGAONE) += cuboot-amigaone.c

src-plat-$(CONFIG_PPC_PS3) += ps3-head.S ps3-hvcall.S ps3.c

src-plat-$(CONFIG_EPAPR_BOOT) += epapr.c

src-plat-$(CONFIG_EPAPR_BOOT) += epapr.c epapr-wrapper.c



src-wlib := $(sort $(src-wlib-y))

src-plat := $(sort $(src-plat-y))

arch/powerpc/boot/epapr-wrapper.c

0 → 100644
+9 −0
Original line number Diff line number Diff line 
extern void epapr_platform_init(unsigned long r3, unsigned long r4,

				unsigned long r5, unsigned long r6,

				unsigned long r7);



void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,

		   unsigned long r6, unsigned long r7)

{

	epapr_platform_init(r3, r4, r5, r6, r7);

}

arch/powerpc/boot/epapr.c

+2 −2
Original line number Diff line number Diff line
@@ -48,7 +48,7 @@ static void platform_fixups(void) 
		       fdt_addr, fdt_totalsize((void *)fdt_addr), ima_size);

}



void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,

void epapr_platform_init(unsigned long r3, unsigned long r4, unsigned long r5,

			 unsigned long r6, unsigned long r7)

{

	epapr_magic = r6;

arch/powerpc/boot/of.c

+15 −1
Original line number Diff line number Diff line
@@ -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);

}

arch/powerpc/boot/wrapper

+5 −4
Original line number Diff line number Diff line
@@ -148,18 +148,18 @@ make_space=y 


case "$platform" in

pseries)

    platformo=$object/of.o

    platformo="$object/of.o $object/epapr.o"

    link_address='0x4000000'

    ;;

maple)

    platformo=$object/of.o

    platformo="$object/of.o $object/epapr.o"

    link_address='0x400000'

    ;;

pmac|chrp)

    platformo=$object/of.o

    platformo="$object/of.o $object/epapr.o"

    ;;

coff)

    platformo="$object/crt0.o $object/of.o"

    platformo="$object/crt0.o $object/of.o $object/epapr.o"

    lds=$object/zImage.coff.lds

    link_address='0x500000'

    pie=
@@ -253,6 +253,7 @@ treeboot-iss4xx-mpic) 
    platformo="$object/treeboot-iss4xx.o"

    ;;

epapr)

    platformo="$object/epapr.o $object/epapr-wrapper.o"

    link_address='0x20000000'

    pie=-pie

    ;;