powerpc/kexec_file: Mark PPC64 specific code

Some of the kexec_file_load code isn't PPC64 specific. Move PPC64
specific code from kexec/file_load.c to kexec/file_load_64.c. Also,
rename purgatory/trampoline.S to purgatory/trampoline_64.S in the same
spirit. No functional changes.

Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
Tested-by: Pingfan Liu <piliu@redhat.com>
Reviewed-by: Laurent Dufour <ldufour@linux.ibm.com>
Reviewed-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/159602276920.575379.10390965946438306388.stgit@hbathini

1 files changed, 0 insertions, 117 deletions

diff --git a/arch/powerpc/purgatory/trampoline.S b/arch/powerpc/purgatory/trampoline.S
deleted file mode 100644
index a5a83c3f53e6..000000000000
--- a/arch/powerpc/purgatory/trampoline.S
+++ /dev/null
@@ -1,117 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * kexec trampoline
- *
- * Based on code taken from kexec-tools and kexec-lite.
- *
- * Copyright (C) 2004 - 2005, Milton D Miller II, IBM Corporation
- * Copyright (C) 2006, Mohan Kumar M, IBM Corporation
- * Copyright (C) 2013, Anton Blanchard, IBM Corporation
- */
-
-#include <asm/asm-compat.h>
-
-	.machine ppc64
-	.balign 256
-	.globl purgatory_start
-purgatory_start:
-	b	master
-
-	/* ABI: possible run_at_load flag at 0x5c */
-	.org purgatory_start + 0x5c
-	.globl run_at_load
-run_at_load:
-	.long 0
-	.size run_at_load, . - run_at_load
-
-	/* ABI: slaves start at 60 with r3=phys */
-	.org purgatory_start + 0x60
-slave:
-	b .
-	/* ABI: end of copied region */
-	.org purgatory_start + 0x100
-	.size purgatory_start, . - purgatory_start
-
-/*
- * The above 0x100 bytes at purgatory_start are replaced with the
- * code from the kernel (or next stage) by setup_purgatory().
- */
-
-master:
-	or	%r1,%r1,%r1	/* low priority to let other threads catchup */
-	isync
-	mr	%r17,%r3	/* save cpu id to r17 */
-	mr	%r15,%r4	/* save physical address in reg15 */
-
-	or	%r3,%r3,%r3	/* ok now to high priority, lets boot */
-	lis	%r6,0x1
-	mtctr	%r6		/* delay a bit for slaves to catch up */
-	bdnz	.		/* before we overwrite 0-100 again */
-
-	bl	0f		/* Work out where we're running */
-0:	mflr	%r18
-
-	/* load device-tree address */
-	ld	%r3, (dt_offset - 0b)(%r18)
-	mr	%r16,%r3	/* save dt address in reg16 */
-	li	%r4,20
-	LWZX_BE	%r6,%r3,%r4	/* fetch __be32 version number at byte 20 */
-	cmpwi	%cr0,%r6,2	/* v2 or later? */
-	blt	1f
-	li	%r4,28
-	STWX_BE	%r17,%r3,%r4	/* Store my cpu as __be32 at byte 28 */
-1:
-	/* load the kernel address */
-	ld	%r4,(kernel - 0b)(%r18)
-
-	/* load the run_at_load flag */
-	/* possibly patched by kexec */
-	ld	%r6,(run_at_load - 0b)(%r18)
-	/* and patch it into the kernel */
-	stw	%r6,(0x5c)(%r4)
-
-	mr	%r3,%r16	/* restore dt address */
-
-	li	%r5,0		/* r5 will be 0 for kernel */
-
-	mfmsr	%r11
-	andi.	%r10,%r11,1	/* test MSR_LE */
-	bne	.Little_endian
-
-	mtctr	%r4		/* prepare branch to */
-	bctr			/* start kernel */
-
-.Little_endian:
-	mtsrr0	%r4		/* prepare branch to */
-
-	clrrdi	%r11,%r11,1	/* clear MSR_LE */
-	mtsrr1	%r11
-
-	rfid			/* update MSR and start kernel */
-
-
-	.balign 8
-	.globl kernel
-kernel:
-	.8byte  0x0
-	.size kernel, . - kernel
-
-	.balign 8
-	.globl dt_offset
-dt_offset:
-	.8byte  0x0
-	.size dt_offset, . - dt_offset
-
-
-	.data
-	.balign 8
-.globl purgatory_sha256_digest
-purgatory_sha256_digest:
-	.skip	32
-	.size purgatory_sha256_digest, . - purgatory_sha256_digest
-
-	.balign 8
-.globl purgatory_sha_regions
-purgatory_sha_regions:
-	.skip	8 * 2 * 16
-	.size purgatory_sha_regions, . - purgatory_sha_regions