ARM: p2v: move patching code to separate assembler source file

Move the phys2virt patching code into a separate .S file before doing
some work on it.

Suggested-by: Nicolas Pitre <nico@fluxnic.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

1 files changed, 0 insertions, 138 deletions

diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index 98c1e68bdfcb..7e3f36809011 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -586,142 +586,4 @@ ENTRY(fixup_smp)
 	ldmfd	sp!, {r4 - r6, pc}
 ENDPROC(fixup_smp)
 
-#ifdef __ARMEB__
-#define LOW_OFFSET	0x4
-#define HIGH_OFFSET	0x0
-#else
-#define LOW_OFFSET	0x0
-#define HIGH_OFFSET	0x4
-#endif
-
-#ifdef CONFIG_ARM_PATCH_PHYS_VIRT
-
-/* __fixup_pv_table - patch the stub instructions with the delta between
- * PHYS_OFFSET and PAGE_OFFSET, which is assumed to be 16MiB aligned and
- * can be expressed by an immediate shifter operand. The stub instruction
- * has a form of '(add|sub) rd, rn, #imm'.
- */
-	__HEAD
-__fixup_pv_table:
-	adr	r0, 1f
-	ldmia	r0, {r3-r7}
-	mvn	ip, #0
-	subs	r3, r0, r3	@ PHYS_OFFSET - PAGE_OFFSET
-	add	r4, r4, r3	@ adjust table start address
-	add	r5, r5, r3	@ adjust table end address
-	add	r6, r6, r3	@ adjust __pv_phys_pfn_offset address
-	add	r7, r7, r3	@ adjust __pv_offset address
-	mov	r0, r8, lsr #PAGE_SHIFT	@ convert to PFN
-	str	r0, [r6]	@ save computed PHYS_OFFSET to __pv_phys_pfn_offset
-	strcc	ip, [r7, #HIGH_OFFSET]	@ save to __pv_offset high bits
-	mov	r6, r3, lsr #24	@ constant for add/sub instructions
-	teq	r3, r6, lsl #24 @ must be 16MiB aligned
-THUMB(	it	ne		@ cross section branch )
-	bne	__error
-	str	r3, [r7, #LOW_OFFSET]	@ save to __pv_offset low bits
-	b	__fixup_a_pv_table
-ENDPROC(__fixup_pv_table)
-
-	.align
-1:	.long	.
-	.long	__pv_table_begin
-	.long	__pv_table_end
-2:	.long	__pv_phys_pfn_offset
-	.long	__pv_offset
-
-	.text
-__fixup_a_pv_table:
-	adr	r0, 3f
-	ldr	r6, [r0]
-	add	r6, r6, r3
-	ldr	r0, [r6, #HIGH_OFFSET]	@ pv_offset high word
-	ldr	r6, [r6, #LOW_OFFSET]	@ pv_offset low word
-	mov	r6, r6, lsr #24
-	cmn	r0, #1
-#ifdef CONFIG_THUMB2_KERNEL
-	moveq	r0, #0x200000	@ set bit 21, mov to mvn instruction
-	lsls	r6, #24
-	beq	2f
-	clz	r7, r6
-	lsr	r6, #24
-	lsl	r6, r7
-	bic	r6, #0x0080
-	lsrs	r7, #1
-	orrcs	r6, #0x0080
-	orr	r6, r6, r7, lsl #12
-	orr	r6, #0x4000
-	b	2f
-1:	add     r7, r3
-	ldrh	ip, [r7, #2]
-ARM_BE8(rev16	ip, ip)
-	tst	ip, #0x4000
-	and	ip, #0x8f00
-	orrne	ip, r6	@ mask in offset bits 31-24
-	orreq	ip, r0	@ mask in offset bits 7-0
-ARM_BE8(rev16	ip, ip)
-	strh	ip, [r7, #2]
-	bne	2f
-	ldrh	ip, [r7]
-ARM_BE8(rev16	ip, ip)
-	bic	ip, #0x20
-	orr	ip, ip, r0, lsr #16
-ARM_BE8(rev16	ip, ip)
-	strh	ip, [r7]
-2:	cmp	r4, r5
-	ldrcc	r7, [r4], #4	@ use branch for delay slot
-	bcc	1b
-	bx	lr
-#else
-	moveq	r0, #0x400000	@ set bit 22, mov to mvn instruction
-	b	2f
-1:	ldr	ip, [r7, r3]
-#ifdef CONFIG_CPU_ENDIAN_BE8
-	@ in BE8, we load data in BE, but instructions still in LE
-	bic	ip, ip, #0xff000000
-	tst	ip, #0x000f0000	@ check the rotation field
-	orrne	ip, ip, r6, lsl #24 @ mask in offset bits 31-24
-	biceq	ip, ip, #0x00004000 @ clear bit 22
-	orreq	ip, ip, r0, ror #8  @ mask in offset bits 7-0
-#else
-	bic	ip, ip, #0x000000ff
-	tst	ip, #0xf00	@ check the rotation field
-	orrne	ip, ip, r6	@ mask in offset bits 31-24
-	biceq	ip, ip, #0x400000	@ clear bit 22
-	orreq	ip, ip, r0	@ mask in offset bits 7-0
-#endif
-	str	ip, [r7, r3]
-2:	cmp	r4, r5
-	ldrcc	r7, [r4], #4	@ use branch for delay slot
-	bcc	1b
-	ret	lr
-#endif
-ENDPROC(__fixup_a_pv_table)
-
-	.align
-3:	.long __pv_offset
-
-ENTRY(fixup_pv_table)
-	stmfd	sp!, {r4 - r7, lr}
-	mov	r3, #0			@ no offset
-	mov	r4, r0			@ r0 = table start
-	add	r5, r0, r1		@ r1 = table size
-	bl	__fixup_a_pv_table
-	ldmfd	sp!, {r4 - r7, pc}
-ENDPROC(fixup_pv_table)
-
-	.data
-	.align	2
-	.globl	__pv_phys_pfn_offset
-	.type	__pv_phys_pfn_offset, %object
-__pv_phys_pfn_offset:
-	.word	0
-	.size	__pv_phys_pfn_offset, . -__pv_phys_pfn_offset
-
-	.globl	__pv_offset
-	.type	__pv_offset, %object
-__pv_offset:
-	.quad	0
-	.size	__pv_offset, . -__pv_offset
-#endif
-
 #include "head-common.S"