Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 128 insertions, 0 deletions

diff --git a/arch/powerpc/boot/crt0.S b/arch/powerpc/boot/crt0.S
new file mode 100644
index 00000000..0f7428a3
--- /dev/null
+++ b/arch/powerpc/boot/crt0.S
@@ -0,0 +1,128 @@
+/*
+ * Copyright (C) Paul Mackerras 1997.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * NOTE: this code runs in 32 bit mode, is position-independent,
+ * and is packaged as ELF32.
+ */
+
+#include "ppc_asm.h"
+
+	.text
+	/* A procedure descriptor used when booting this as a COFF file.
+	 * When making COFF, this comes first in the link and we're
+	 * linked at 0x500000.
+	 */
+	.globl	_zimage_start_opd
+_zimage_start_opd:
+	.long	0x500000, 0, 0, 0
+
+p_start:	.long	_start
+p_etext:	.long	_etext
+p_bss_start:	.long	__bss_start
+p_end:		.long	_end
+
+	.weak	_platform_stack_top
+p_pstack:	.long	_platform_stack_top
+
+	.weak	_zimage_start
+	.globl	_zimage_start
+_zimage_start:
+	.globl	_zimage_start_lib
+_zimage_start_lib:
+	/* Work out the offset between the address we were linked at
+	   and the address where we're running. */
+	bl	.+4
+p_base:	mflr	r10		/* r10 now points to runtime addr of p_base */
+	/* grab the link address of the dynamic section in r11 */
+	addis	r11,r10,(_GLOBAL_OFFSET_TABLE_-p_base)@ha
+	lwz	r11,(_GLOBAL_OFFSET_TABLE_-p_base)@l(r11)
+	cmpwi	r11,0
+	beq	3f		/* if not linked -pie */
+	/* get the runtime address of the dynamic section in r12 */
+	.weak	__dynamic_start
+	addis	r12,r10,(__dynamic_start-p_base)@ha
+	addi	r12,r12,(__dynamic_start-p_base)@l
+	subf	r11,r11,r12	/* runtime - linktime offset */
+
+	/* The dynamic section contains a series of tagged entries.
+	 * We need the RELA and RELACOUNT entries. */
+RELA = 7
+RELACOUNT = 0x6ffffff9
+	li	r9,0
+	li	r0,0
+9:	lwz	r8,0(r12)	/* get tag */
+	cmpwi	r8,0
+	beq	10f		/* end of list */
+	cmpwi	r8,RELA
+	bne	11f
+	lwz	r9,4(r12)	/* get RELA pointer in r9 */
+	b	12f
+11:	addis	r8,r8,(-RELACOUNT)@ha
+	cmpwi	r8,RELACOUNT@l
+	bne	12f
+	lwz	r0,4(r12)	/* get RELACOUNT value in r0 */
+12:	addi	r12,r12,8
+	b	9b
+
+	/* The relocation section contains a list of relocations.
+	 * We now do the R_PPC_RELATIVE ones, which point to words
+	 * which need to be initialized with addend + offset.
+	 * The R_PPC_RELATIVE ones come first and there are RELACOUNT
+	 * of them. */
+10:	/* skip relocation if we don't have both */
+	cmpwi	r0,0
+	beq	3f
+	cmpwi	r9,0
+	beq	3f
+
+	add	r9,r9,r11	/* Relocate RELA pointer */
+	mtctr	r0
+2:	lbz	r0,4+3(r9)	/* ELF32_R_INFO(reloc->r_info) */
+	cmpwi	r0,22		/* R_PPC_RELATIVE */
+	bne	3f
+	lwz	r12,0(r9)	/* reloc->r_offset */
+	lwz	r0,8(r9)	/* reloc->r_addend */
+	add	r0,r0,r11
+	stwx	r0,r11,r12
+	addi	r9,r9,12
+	bdnz	2b
+
+	/* Do a cache flush for our text, in case the loader didn't */
+3:	lwz	r9,p_start-p_base(r10)	/* note: these are relocated now */
+	lwz	r8,p_etext-p_base(r10)
+4:	dcbf	r0,r9
+	icbi	r0,r9
+	addi	r9,r9,0x20
+	cmplw	cr0,r9,r8
+	blt	4b
+	sync
+	isync
+
+	/* Clear the BSS */
+	lwz	r9,p_bss_start-p_base(r10)
+	lwz	r8,p_end-p_base(r10)
+	li	r0,0
+5:	stw	r0,0(r9)
+	addi	r9,r9,4
+	cmplw	cr0,r9,r8
+	blt	5b
+
+	/* Possibly set up a custom stack */
+	lwz	r8,p_pstack-p_base(r10)
+	cmpwi	r8,0
+	beq	6f
+	lwz	r1,0(r8)
+	li	r0,0
+	stwu	r0,-16(r1)	/* establish a stack frame */
+6:
+
+	/* Call platform_init() */
+	bl	platform_init
+
+	/* Call start */
+	b	start