arm: move C runtime setup code in crt0.S

Move all the C runtime setup code from every start.S
in arch/arm into arch/arm/lib/crt0.S. This covers
the code sequence from setting up the initial stack
to calling into board_init_r().

Also, rewrite the C runtime setup and make functions
board_init_*() and relocate_code() behave according to
normal C semantics (no jumping across the C stack any
more, etc).

Some SPL targets had to be touched because they use
start.S explicitly or for some reason; the relevant
maintainers and custodians are cc:ed.

Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>

13 files changed, 125 insertions, 663 deletions

diff --git a/arch/arm/cpu/arm1136/start.S b/arch/arm/cpu/arm1136/start.S
index 5d3b4c2..a067b8a 100644
--- a/arch/arm/cpu/arm1136/start.S
+++ b/arch/arm/cpu/arm1136/start.S
@@ -165,13 +165,7 @@ next:
 	bl  cpu_init_crit
 #endif
 
-/* Set stackpointer in internal RAM to call board_init_f */
-call_board_init_f:
-	ldr	sp, =(CONFIG_SYS_INIT_SP_ADDR)
-	bic	sp, sp, #7 /* 8-byte alignment for ABI compliance */
-	ldr	r0,=0x00000000
-
-	bl	board_init_f
+	bl	_main
 
 /*------------------------------------------------------------------------------*/
 
@@ -188,14 +182,10 @@ relocate_code:
 	mov	r5, r1	/* save addr of gd */
 	mov	r6, r2	/* save addr of destination */
 
-	/* Set up the stack						    */
-stack_setup:
-	mov	sp, r4
-
 	adr	r0, _start
 	cmp	r0, r6
 	moveq	r9, #0		/* no relocation. relocation offset(r9) = 0 */
-	beq	clear_bss		/* skip relocation */
+	beq	relocate_done		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
 	ldr	r3, _image_copy_end_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
@@ -245,7 +235,15 @@ fixnext:
 	add	r2, r2, #8		/* each rel.dyn entry is 8 bytes */
 	cmp	r2, r3
 	blo	fixloop
-	b	clear_bss
+	bx	lr
+
+#endif
+
+relocate_done:
+
+	bx	lr
+
+#ifndef CONFIG_SPL_BUILD
 
 _rel_dyn_start_ofs:
 	.word __rel_dyn_start - _start
@@ -253,54 +251,13 @@ _rel_dyn_end_ofs:
 	.word __rel_dyn_end - _start
 _dynsym_start_ofs:
 	.word __dynsym_start - _start
-#endif
 
-clear_bss:
-#ifdef CONFIG_SPL_BUILD
-	/* No relocation for SPL */
-	ldr	r0, =__bss_start
-	ldr	r1, =__bss_end__
-#else
-	ldr	r0, _bss_start_ofs
-	ldr	r1, _bss_end_ofs
-	mov	r4, r6			/* reloc addr */
-	add	r0, r0, r4
-	add	r1, r1, r4
 #endif
-	mov	r2, #0x00000000		/* clear			    */
-
-clbss_l:cmp	r0, r1			/* clear loop... */
-	bhs	clbss_e			/* if reached end of bss, exit */
-	str	r2, [r0]
-	add	r0, r0, #4
-	b	clbss_l
-clbss_e:
 
-/*
- * We are done. Do not return, instead branch to second part of board
- * initialization, now running from RAM.
- */
-#ifdef CONFIG_NAND_SPL
-	ldr     r0, _nand_boot_ofs
-	mov	pc, r0
+	.globl	c_runtime_cpu_setup
+c_runtime_cpu_setup:
 
-_nand_boot_ofs:
-	.word nand_boot
-#else
-jump_2_ram:
-	ldr	r0, _board_init_r_ofs
-	adr	r1, _start
-	add	lr, r0, r1
-	add	lr, lr, r9
-	/* setup parameters for board_init_r */
-	mov	r0, r5		/* gd_t */
-	mov	r1, r6		/* dest_addr */
-	/* jump to it ... */
-	mov	pc, lr
-
-_board_init_r_ofs:
-	.word board_init_r - _start
-#endif
+	bx	lr
 
 /*
  *************************************************************************
diff --git a/arch/arm/cpu/arm1176/start.S b/arch/arm/cpu/arm1176/start.S
index 667a0e0..40df4b1 100644
--- a/arch/arm/cpu/arm1176/start.S
+++ b/arch/arm/cpu/arm1176/start.S
@@ -224,12 +224,7 @@ skip_tcmdisable:
 	 */
 	bl	lowlevel_init		/* go setup pll,mux,memory */
 
-/* Set stackpointer in internal RAM to call board_init_f */
-call_board_init_f:
-	ldr	sp, =(CONFIG_SYS_INIT_SP_ADDR)
-	bic	sp, sp, #7 /* 8-byte alignment for ABI compliance */
-	ldr	r0,=0x00000000
-	bl	board_init_f
+	bl	_main
 
 /*------------------------------------------------------------------------------*/
 
@@ -246,14 +241,10 @@ relocate_code:
 	mov	r5, r1	/* save addr of gd */
 	mov	r6, r2	/* save addr of destination */
 
-	/* Set up the stack						    */
-stack_setup:
-	mov	sp, r4
-
 	adr	r0, _start
 	cmp	r0, r6
 	moveq	r9, #0		/* no relocation. relocation offset(r9) = 0 */
-	beq	clear_bss		/* skip relocation */
+	beq	relocate_done		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
 	ldr	r3, _bss_start_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
@@ -343,49 +334,9 @@ mmu_enable:
 skip_hw_init:
 #endif
 
-clear_bss:
-#ifndef CONFIG_SPL_BUILD
-	ldr	r0, _bss_start_ofs
-	ldr	r1, _bss_end_ofs
-	mov	r4, r6			/* reloc addr */
-	add	r0, r0, r4
-	add	r1, r1, r4
-	mov	r2, #0x00000000		/* clear			    */
-
-clbss_l:cmp	r0, r1			/* clear loop... */
-	bhs	clbss_e			/* if reached end of bss, exit */
-	str	r2, [r0]
-	add	r0, r0, #4
-	b	clbss_l
-clbss_e:
-#ifndef CONFIG_NAND_SPL
-	bl coloured_LED_init
-	bl red_led_on
-#endif
-#endif
+relocate_done:
 
-/*
- * We are done. Do not return, instead branch to second part of board
- * initialization, now running from RAM.
- */
-#ifdef CONFIG_NAND_SPL
-	ldr     pc, _nand_boot
-
-_nand_boot: .word nand_boot
-#else
-	ldr	r0, _board_init_r_ofs
-	adr	r1, _start
-	add	lr, r0, r1
-	add     lr, lr, r9
-	/* setup parameters for board_init_r */
-	mov	r0, r5		/* gd_t */
-	mov	r1, r6		/* dest_addr */
-	/* jump to it ... */
-	mov	pc, lr
-
-_board_init_r_ofs:
-	.word board_init_r - _start
-#endif
+	bx	lr
 
 _rel_dyn_start_ofs:
 	.word __rel_dyn_start - _start
@@ -399,6 +350,11 @@ _mmu_table_base:
 	.word mmu_table
 #endif
 
+	.globl	c_runtime_cpu_setup
+c_runtime_cpu_setup:
+
+	mov	pc, lr
+
 #ifndef CONFIG_NAND_SPL
 /*
  * we assume that cache operation is done before. (eg. cleanup_before_linux())
diff --git a/arch/arm/cpu/arm720t/start.S b/arch/arm/cpu/arm720t/start.S
index c2a7763..771d386 100644
--- a/arch/arm/cpu/arm720t/start.S
+++ b/arch/arm/cpu/arm720t/start.S
@@ -147,12 +147,7 @@ reset:
 	bl	cpu_init_crit
 #endif
 
-/* Set stackpointer in internal RAM to call board_init_f */
-call_board_init_f:
-	ldr	sp, =(CONFIG_SYS_INIT_SP_ADDR)
-	bic	sp, sp, #7 /* 8-byte alignment for ABI compliance */
-	ldr	r0,=0x00000000
-	bl	board_init_f
+	bl	_main
 
 /*------------------------------------------------------------------------------*/
 
@@ -169,14 +164,10 @@ relocate_code:
 	mov	r5, r1	/* save addr of gd */
 	mov	r6, r2	/* save addr of destination */
 
-	/* Set up the stack						    */
-stack_setup:
-	mov	sp, r4
-
 	adr	r0, _start
 	cmp	r0, r6
 	moveq	r9, #0		/* no relocation. relocation offset(r9) = 0 */
-	beq	clear_bss		/* skip relocation */
+	beq	relocate_done		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
 	ldr	r3, _bss_start_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
@@ -228,43 +219,10 @@ fixnext:
 	blo	fixloop
 #endif
 
-clear_bss:
-#ifndef CONFIG_SPL_BUILD
-	ldr	r0, _bss_start_ofs
-	ldr	r1, _bss_end_ofs
-	mov	r4, r6			/* reloc addr */
-	add	r0, r0, r4
-	add	r1, r1, r4
-	mov	r2, #0x00000000		/* clear			    */
-
-clbss_l:cmp	r0, r1			/* clear loop... */
-	bhs	clbss_e			/* if reached end of bss, exit */
-	str	r2, [r0]
-	add	r0, r0, #4
-	b	clbss_l
-clbss_e:
-
-	bl coloured_LED_init
-	bl red_led_on
-#endif
+relocate_done:
 
-/*
- * We are done. Do not return, instead branch to second part of board
- * initialization, now running from RAM.
- */
-	ldr	r0, _board_init_r_ofs
-	adr	r1, _start
-	add	lr, r0, r1
-	add	lr, lr, r9
-	/* setup parameters for board_init_r */
-	mov	r0, r5		/* gd_t */
-	mov	r1, r6		/* dest_addr */
-	/* jump to it ... */
 	mov	pc, lr
 
-_board_init_r_ofs:
-	.word board_init_r - _start
-
 _rel_dyn_start_ofs:
 	.word __rel_dyn_start - _start
 _rel_dyn_end_ofs:
@@ -272,6 +230,11 @@ _rel_dyn_end_ofs:
 _dynsym_start_ofs:
 	.word __dynsym_start - _start
 
+	.globl	c_runtime_cpu_setup
+c_runtime_cpu_setup:
+
+	mov	pc, lr
+
 /*
  *************************************************************************
  *
diff --git a/arch/arm/cpu/arm920t/start.S b/arch/arm/cpu/arm920t/start.S
index 14c9156..511d21d 100644
--- a/arch/arm/cpu/arm920t/start.S
+++ b/arch/arm/cpu/arm920t/start.S
@@ -182,12 +182,7 @@ copyex:
 	bl	cpu_init_crit
 #endif
 
-/* Set stackpointer in internal RAM to call board_init_f */
-call_board_init_f:
-	ldr	sp, =(CONFIG_SYS_INIT_SP_ADDR)
-	bic	sp, sp, #7 /* 8-byte alignment for ABI compliance */
-	ldr	r0,=0x00000000
-	bl	board_init_f
+	bl	_main
 
 /*------------------------------------------------------------------------------*/
 
@@ -204,14 +199,10 @@ relocate_code:
 	mov	r5, r1	/* save addr of gd */
 	mov	r6, r2	/* save addr of destination */
 
-	/* Set up the stack						    */
-stack_setup:
-	mov	sp, r4
-
 	adr	r0, _start
 	cmp	r0, r6
 	moveq	r9, #0		/* no relocation. relocation offset(r9) = 0 */
-	beq	clear_bss		/* skip relocation */
+	beq	relocate_done		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
 	ldr	r3, _bss_start_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
@@ -263,51 +254,10 @@ fixnext:
 	blo	fixloop
 #endif
 
-clear_bss:
-#ifndef CONFIG_SPL_BUILD
-	ldr	r0, _bss_start_ofs
-	ldr	r1, _bss_end_ofs
-	mov	r4, r6			/* reloc addr */
-	add	r0, r0, r4
-	add	r1, r1, r4
-	mov	r2, #0x00000000		/* clear			    */
-
-clbss_l:cmp	r0, r1			/* clear loop... */
-	bhs	clbss_e			/* if reached end of bss, exit */
-	str	r2, [r0]
-	add	r0, r0, #4
-	b	clbss_l
-clbss_e:
-
-	bl coloured_LED_init
-	bl red_led_on
-#endif
-
-/*
- * We are done. Do not return, instead branch to second part of board
- * initialization, now running from RAM.
- */
-#ifdef CONFIG_NAND_SPL
-	ldr     r0, _nand_boot_ofs
-	mov	pc, r0
+relocate_done:
 
-_nand_boot_ofs:
-	.word nand_boot
-#else
-	ldr	r0, _board_init_r_ofs
-	adr	r1, _start
-	add	lr, r0, r1
-	add	lr, lr, r9
-	/* setup parameters for board_init_r */
-	mov	r0, r5		/* gd_t */
-	mov	r1, r6		/* dest_addr */
-	/* jump to it ... */
 	mov	pc, lr
 
-_board_init_r_ofs:
-	.word board_init_r - _start
-#endif
-
 _rel_dyn_start_ofs:
 	.word __rel_dyn_start - _start
 _rel_dyn_end_ofs:
@@ -315,6 +265,11 @@ _rel_dyn_end_ofs:
 _dynsym_start_ofs:
 	.word __dynsym_start - _start
 
+	.globl	c_runtime_cpu_setup
+c_runtime_cpu_setup:
+
+	mov	pc, lr
+
 /*
  *************************************************************************
  *
diff --git a/arch/arm/cpu/arm925t/start.S b/arch/arm/cpu/arm925t/start.S
index 3a483f6..82f5b8b 100644
--- a/arch/arm/cpu/arm925t/start.S
+++ b/arch/arm/cpu/arm925t/start.S
@@ -176,12 +176,7 @@ poll1:
 	bl  cpu_init_crit
 #endif
 
-/* Set stackpointer in internal RAM to call board_init_f */
-call_board_init_f:
-	ldr	sp, =(CONFIG_SYS_INIT_SP_ADDR)
-	bic	sp, sp, #7 /* 8-byte alignment for ABI compliance */
-	ldr	r0,=0x00000000
-	bl	board_init_f
+	bl	_main
 
 /*------------------------------------------------------------------------------*/
 
@@ -198,14 +193,10 @@ relocate_code:
 	mov	r5, r1	/* save addr of gd */
 	mov	r6, r2	/* save addr of destination */
 
-	/* Set up the stack						    */
-stack_setup:
-	mov	sp, r4
-
 	adr	r0, _start
 	cmp	r0, r6
 	moveq	r9, #0		/* no relocation. relocation offset(r9) = 0 */
-	beq	clear_bss		/* skip relocation */
+	beq	relocate_done		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
 	ldr	r3, _bss_start_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
@@ -257,51 +248,10 @@ fixnext:
 	blo	fixloop
 #endif
 
-clear_bss:
-#ifndef CONFIG_SPL_BUILD
-	ldr	r0, _bss_start_ofs
-	ldr	r1, _bss_end_ofs
-	mov	r4, r6			/* reloc addr */
-	add	r0, r0, r4
-	add	r1, r1, r4
-	mov	r2, #0x00000000		/* clear			    */
-
-clbss_l:cmp	r0, r1			/* clear loop... */
-	bhs	clbss_e			/* if reached end of bss, exit */
-	str	r2, [r0]
-	add	r0, r0, #4
-	b	clbss_l
-clbss_e:
-
-	bl coloured_LED_init
-	bl red_led_on
-#endif
-
-/*
- * We are done. Do not return, instead branch to second part of board
- * initialization, now running from RAM.
- */
-#ifdef CONFIG_NAND_SPL
-	ldr     r0, _nand_boot_ofs
-	mov	pc, r0
+relocate_done:
 
-_nand_boot_ofs:
-	.word nand_boot
-#else
-	ldr	r0, _board_init_r_ofs
-	adr	r1, _start
-	add	lr, r0, r1
-	add	lr, lr, r9
-	/* setup parameters for board_init_r */
-	mov	r0, r5		/* gd_t */
-	mov	r1, r6		/* dest_addr */
-	/* jump to it ... */
 	mov	pc, lr
 
-_board_init_r_ofs:
-	.word board_init_r - _start
-#endif
-
 _rel_dyn_start_ofs:
 	.word __rel_dyn_start - _start
 _rel_dyn_end_ofs:
@@ -309,6 +259,11 @@ _rel_dyn_end_ofs:
 _dynsym_start_ofs:
 	.word __dynsym_start - _start
 
+	.globl	c_runtime_cpu_setup
+c_runtime_cpu_setup:
+
+	mov	pc, lr
+
 /*
  *************************************************************************
  *
diff --git a/arch/arm/cpu/arm926ejs/start.S b/arch/arm/cpu/arm926ejs/start.S
index 2188f7e..3cdecd9 100644
--- a/arch/arm/cpu/arm926ejs/start.S
+++ b/arch/arm/cpu/arm926ejs/start.S
@@ -198,20 +198,7 @@ reset:
 	bl	cpu_init_crit
 #endif
 
-/* Set stackpointer in internal RAM to call board_init_f */
-call_board_init_f:
-#ifdef CONFIG_NAND_SPL /* deprecated, use instead CONFIG_SPL_BUILD */
-	ldr	sp, =(CONFIG_SYS_INIT_SP_ADDR)
-#else
-#ifdef CONFIG_SPL_BUILD
-	ldr	sp, =(CONFIG_SPL_STACK)
-#else
-	ldr	sp, =(CONFIG_SYS_INIT_SP_ADDR)
-#endif
-#endif
-	bic	sp, sp, #7 /* 8-byte alignment for ABI compliance */
-	ldr	r0,=0x00000000
-	bl	board_init_f
+	bl	_main
 
 /*------------------------------------------------------------------------------*/
 
@@ -229,15 +216,11 @@ relocate_code:
 	mov	r5, r1	/* save addr of gd */
 	mov	r6, r2	/* save addr of destination */
 
-	/* Set up the stack						    */
-stack_setup:
-	mov	sp, r4
-
 	adr	r0, _start
 	sub	r9, r6, r0		/* r9 <- relocation offset */
 	cmp	r0, r6
-	moveq	r9, #0		/* no relocation. relocation offset(r9) = 0 */
-	beq	clear_bss		/* skip relocation */
+	moveq	r9, #0			/* no relocation. offset(r9) = 0 */
+	beq	relocate_done		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy loop */
 	ldr	r3, _bss_start_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
@@ -289,56 +272,9 @@ fixnext:
 	blo	fixloop
 #endif
 
-clear_bss:
-#ifdef CONFIG_SPL_BUILD
-	/* No relocation for SPL */
-	ldr	r0, =__bss_start
-	ldr	r1, =__bss_end__
-#else
-	ldr	r0, _bss_start_ofs
-	ldr	r1, _bss_end_ofs
-	mov	r4, r6			/* reloc addr */
-	add	r0, r0, r4
-	add	r1, r1, r4
-#endif
-	mov	r2, #0x00000000		/* clear			    */
-
-clbss_l:cmp	r0, r1			/* clear loop... */
-	bhs	clbss_e			/* if reached end of bss, exit */
-	str	r2, [r0]
-	add	r0, r0, #4
-	b	clbss_l
-clbss_e:
+relocate_done:
 
-#ifndef CONFIG_SPL_BUILD
-	bl coloured_LED_init
-	bl red_led_on
-#endif
-
-/*
- * We are done. Do not return, instead branch to second part of board
- * initialization, now running from RAM.
- */
-#ifdef CONFIG_NAND_SPL
-	ldr     r0, _nand_boot_ofs
-	mov	pc, r0
-
-_nand_boot_ofs:
-	.word nand_boot
-#else
-	ldr	r0, _board_init_r_ofs
-	ldr	r1, _TEXT_BASE
-	add	lr, r0, r1
-	add	lr, lr, r9
-	/* setup parameters for board_init_r */
-	mov	r0, r5		/* gd_t */
-	mov	r1, r6		/* dest_addr */
-	/* jump to it ... */
-	mov	pc, lr
-
-_board_init_r_ofs:
-	.word board_init_r - _start
-#endif
+	bx	lr
 
 _rel_dyn_start_ofs:
 	.word __rel_dyn_start - _start
@@ -346,8 +282,14 @@ _rel_dyn_end_ofs:
 	.word __rel_dyn_end - _start
 _dynsym_start_ofs:
 	.word __dynsym_start - _start
+
 #endif
 
+	.globl	c_runtime_cpu_setup
+c_runtime_cpu_setup:
+
+	bx	lr
+
 /*
  *************************************************************************
  *
diff --git a/arch/arm/cpu/arm946es/start.S b/arch/arm/cpu/arm946es/start.S
index 30e2183..a7a98a4 100644
--- a/arch/arm/cpu/arm946es/start.S
+++ b/arch/arm/cpu/arm946es/start.S
@@ -147,12 +147,7 @@ reset:
 	bl	cpu_init_crit
 #endif
 
-/* Set stackpointer in internal RAM to call board_init_f */
-call_board_init_f:
-	ldr	sp, =(CONFIG_SYS_INIT_SP_ADDR)
-	bic	sp, sp, #7 /* 8-byte alignment for ABI compliance */
-	ldr	r0,=0x00000000
-	bl	board_init_f
+	bl	_main
 
 /*------------------------------------------------------------------------------*/
 
@@ -169,14 +164,10 @@ relocate_code:
 	mov	r5, r1	/* save addr of gd */
 	mov	r6, r2	/* save addr of destination */
 
-	/* Set up the stack						    */
-stack_setup:
-	mov	sp, r4
-
 	adr	r0, _start
 	cmp	r0, r6
 	moveq	r9, #0		/* no relocation. relocation offset(r9) = 0 */
-	beq	clear_bss		/* skip relocation */
+	beq	relocate_done		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
 	ldr	r3, _bss_start_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
@@ -228,46 +219,10 @@ fixnext:
 	blo	fixloop
 #endif
 
-clear_bss:
-#ifndef CONFIG_SPL_BUILD
-	ldr	r0, _bss_start_ofs
-	ldr	r1, _bss_end_ofs
-	mov	r4, r6			/* reloc addr */
-	add	r0, r0, r4
-	add	r1, r1, r4
-	mov	r2, #0x00000000		/* clear			    */
-
-clbss_l:cmp	r0, r1			/* clear loop... */
-	bhs	clbss_e			/* if reached end of bss, exit */
-	str	r2, [r0]
-	add	r0, r0, #4
-	b	clbss_l
-clbss_e:
-#endif
-
-/*
- * We are done. Do not return, instead branch to second part of board
- * initialization, now running from RAM.
- */
-#ifdef CONFIG_NAND_SPL
-	ldr     pc, _nand_boot
+relocate_done:
 
-_nand_boot: .word nand_boot
-#else
-	ldr	r0, _board_init_r_ofs
-	adr	r1, _start
-	add	lr, r0, r1
-	add	lr, lr, r9
-	/* setup parameters for board_init_r */
-	mov	r0, r5		/* gd_t */
-	mov	r1, r6		/* dest_addr */
-	/* jump to it ... */
 	mov	pc, lr
 
-_board_init_r_ofs:
-	.word board_init_r - _start
-#endif
-
 _rel_dyn_start_ofs:
 	.word __rel_dyn_start - _start
 _rel_dyn_end_ofs:
@@ -275,6 +230,11 @@ _rel_dyn_end_ofs:
 _dynsym_start_ofs:
 	.word __dynsym_start - _start
 
+	.globl	c_runtime_cpu_setup
+c_runtime_cpu_setup:
+
+	mov	pc, lr
+
 /*
  *************************************************************************
  *
diff --git a/arch/arm/cpu/arm_intcm/start.S b/arch/arm/cpu/arm_intcm/start.S
index a133d19..c189849 100644
--- a/arch/arm/cpu/arm_intcm/start.S
+++ b/arch/arm/cpu/arm_intcm/start.S
@@ -143,12 +143,7 @@ reset:
 	bl	cpu_init_crit
 #endif
 
-/* Set stackpointer in internal RAM to call board_init_f */
-call_board_init_f:
-	ldr	sp, =(CONFIG_SYS_INIT_SP_ADDR)
-	bic	sp, sp, #7 /* 8-byte alignment for ABI compliance */
-	ldr	r0,=0x00000000
-	bl	board_init_f
+	bl	_main
 
 /*------------------------------------------------------------------------------*/
 
@@ -165,14 +160,10 @@ relocate_code:
 	mov	r5, r1	/* save addr of gd */
 	mov	r6, r2	/* save addr of destination */
 
-	/* Set up the stack						    */
-stack_setup:
-	mov	sp, r4
-
 	adr	r0, _start
 	cmp	r0, r6
 	moveq	r9, #0		/* no relocation. relocation offset(r9) = 0 */
-	beq	clear_bss		/* skip relocation */
+	beq	relocate_done		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
 	ldr	r3, _bss_start_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
@@ -224,50 +215,9 @@ fixnext:
 	blo	fixloop
 #endif
 
-clear_bss:
-#ifndef CONFIG_SPL_BUILD
-	ldr	r0, _bss_start_ofs
-	ldr	r1, _bss_end_ofs
-	mov	r4, r6			/* reloc addr */
-	add	r0, r0, r4
-	add	r1, r1, r4
-	mov	r2, #0x00000000		/* clear			    */
-
-clbss_l:cmp	r0, r1			/* clear loop... */
-	bhs	clbss_e			/* if reached end of bss, exit */
-	str	r2, [r0]
-	add	r0, r0, #4
-	b	clbss_l
-clbss_e:
-
-	bl coloured_LED_init
-	bl red_led_on
-#endif
+relocate_done:
 
-/*
- * We are done. Do not return, instead branch to second part of board
- * initialization, now running from RAM.
- */
-#ifdef CONFIG_NAND_SPL
-	ldr     r0, _nand_boot_ofs
-	mov	pc, r0
-
-_nand_boot_ofs:
-	.word nand_boot
-#else
-	ldr	r0, _board_init_r_ofs
-	adr	r1, _start
-	add	lr, r0, r1
-	add	lr, lr, r9
-	/* setup parameters for board_init_r */
-	mov	r0, r5		/* gd_t */
-	mov	r1, r6		/* dest_addr */
-	/* jump to it ... */
-	mov	pc, lr
-
-_board_init_r_ofs:
-	.word board_init_r - _start
-#endif
+	bx	lr
 
 _rel_dyn_start_ofs:
 	.word __rel_dyn_start - _start
@@ -276,6 +226,11 @@ _rel_dyn_end_ofs:
 _dynsym_start_ofs:
 	.word __dynsym_start - _start
 
+	.globl	c_runtime_cpu_setup
+c_runtime_cpu_setup:
+
+	mov	pc, lr
+
 /*
  *************************************************************************
  *
diff --git a/arch/arm/cpu/armv7/start.S b/arch/arm/cpu/armv7/start.S
index 7df97c5..dcc1f83 100644
--- a/arch/arm/cpu/armv7/start.S
+++ b/arch/arm/cpu/armv7/start.S
@@ -155,12 +155,7 @@ reset:
 	bl	cpu_init_crit
 #endif
 
-/* Set stackpointer in internal RAM to call board_init_f */
-call_board_init_f:
-	ldr	sp, =(CONFIG_SYS_INIT_SP_ADDR)
-	bic	sp, sp, #7 /* 8-byte alignment for ABI compliance */
-	ldr	r0,=0x00000000
-	bl	board_init_f
+	bl	_main
 
 /*------------------------------------------------------------------------------*/
 
@@ -177,14 +172,10 @@ ENTRY(relocate_code)
 	mov	r5, r1	/* save addr of gd */
 	mov	r6, r2	/* save addr of destination */
 
-	/* Set up the stack						    */
-stack_setup:
-	mov	sp, r4
-
 	adr	r0, _start
 	cmp	r0, r6
 	moveq	r9, #0		/* no relocation. relocation offset(r9) = 0 */
-	beq	clear_bss		/* skip relocation */
+	beq	relocate_done		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
 	ldr	r3, _image_copy_end_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
@@ -233,34 +224,22 @@ fixnext:
 	add	r2, r2, #8		/* each rel.dyn entry is 8 bytes */
 	cmp	r2, r3
 	blo	fixloop
-	b	clear_bss
+
+relocate_done:
+
+	bx	lr
+
 _rel_dyn_start_ofs:
 	.word __rel_dyn_start - _start
 _rel_dyn_end_ofs:
 	.word __rel_dyn_end - _start
 _dynsym_start_ofs:
 	.word __dynsym_start - _start
+ENDPROC(relocate_code)
 
-clear_bss:
-	ldr	r0, _bss_start_ofs
-	ldr	r1, _bss_end_ofs
-	mov	r4, r6			/* reloc addr */
-	add	r0, r0, r4
-	add	r1, r1, r4
-	mov	r2, #0x00000000		/* clear			    */
-
-clbss_l:cmp	r0, r1			/* clear loop... */
-	bhs	clbss_e			/* if reached end of bss, exit */
-	str	r2, [r0]
-	add	r0, r0, #4
-	b	clbss_l
-clbss_e:
+#endif
 
-/*
- * We are done. Do not return, instead branch to second part of board
- * initialization, now running from RAM.
- */
-jump_2_ram:
+ENTRY(c_runtime_cpu_setup)
 /*
  * If I-cache is enabled invalidate it
  */
@@ -279,20 +258,9 @@ jump_2_ram:
 	mcr     p15, 0, r0, c12, c0, 0  @Set VBAR
 #endif /* !Tegra20 */
 
-	ldr	r0, _board_init_r_ofs
-	adr	r1, _start
-	add	lr, r0, r1
-	add	lr, lr, r9
-	/* setup parameters for board_init_r */
-	mov	r0, r5		/* gd_t */
-	mov	r1, r6		/* dest_addr */
-	/* jump to it ... */
-	mov	pc, lr
-
-_board_init_r_ofs:
-	.word board_init_r - _start
-ENDPROC(relocate_code)
-#endif
+	bx	lr
+
+ENDPROC(c_runtime_cpu_setup)
 
 /*************************************************************************
  *
diff --git a/arch/arm/cpu/ixp/start.S b/arch/arm/cpu/ixp/start.S
index c12f1a7..efb5a40 100644
--- a/arch/arm/cpu/ixp/start.S
+++ b/arch/arm/cpu/ixp/start.S
@@ -245,12 +245,7 @@ reset:
 	orr	r0,r0,#0x13
 	msr	cpsr,r0
 
-/* Set initial stackpointer in SDRAM to call board_init_f */
-call_board_init_f:
-	ldr	sp, =(CONFIG_SYS_INIT_SP_ADDR)
-	bic	sp, sp, #7 /* 8-byte alignment for ABI compliance */
-	ldr	r0,=0x00000000
-	bl	board_init_f
+	bl	_main
 
 /*------------------------------------------------------------------------------*/
 
@@ -267,14 +262,10 @@ relocate_code:
 	mov	r5, r1	/* save addr of gd */
 	mov	r6, r2	/* save addr of destination */
 
-	/* Set up the stack						    */
-stack_setup:
-	mov	sp, r4
-
 	adr	r0, _start
 	cmp	r0, r6
 	moveq	r9, #0		/* no relocation. relocation offset(r9) = 0 */
-	beq	clear_bss		/* skip relocation */
+	beq	relocate_done		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
 	ldr	r3, _bss_start_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
@@ -326,42 +317,9 @@ fixnext:
 	blo	fixloop
 #endif
 
-clear_bss:
-#ifndef CONFIG_SPL_BUILD
-	ldr	r0, _bss_start_ofs
-	ldr	r1, _bss_end_ofs
-	mov	r4, r6			/* reloc addr */
-	add	r0, r0, r4
-	add	r1, r1, r4
-	mov	r2, #0x00000000		/* clear			    */
-
-clbss_l:cmp	r0, r1			/* clear loop... */
-	bhs	clbss_e			/* if reached end of bss, exit */
-	str	r2, [r0]
-	add	r0, r0, #4
-	b	clbss_l
-clbss_e:
-
-	bl coloured_LED_init
-	bl red_led_on
-#endif
+relocate_done:
 
-/*
- * We are done. Do not return, instead branch to second part of board
- * initialization, now running from RAM.
- */
-	ldr	r0, _board_init_r_ofs
-	adr	r1, _start
-	add	lr, r0, r1
-	add	lr, lr, r9
-	/* setup parameters for board_init_r */
-	mov	r0, r5		/* gd_t */
-	mov	r1, r6		/* dest_addr */
-	/* jump to it ... */
-	mov	pc, lr
-
-_board_init_r_ofs:
-	.word board_init_r - _start
+	bx	lr
 
 _rel_dyn_start_ofs:
 	.word __rel_dyn_start - _start
@@ -370,6 +328,11 @@ _rel_dyn_end_ofs:
 _dynsym_start_ofs:
 	.word __dynsym_start - _start
 
+	.globl	c_runtime_cpu_setup
+c_runtime_cpu_setup:
+
+	bx	lr
+
 /****************************************************************************/
 /*									    */
 /* Interrupt handling							    */
diff --git a/arch/arm/cpu/pxa/start.S b/arch/arm/cpu/pxa/start.S
index 536cf5c..72af869 100644
--- a/arch/arm/cpu/pxa/start.S
+++ b/arch/arm/cpu/pxa/start.S
@@ -164,12 +164,7 @@ reset:
 	bl	lock_cache_for_stack
 #endif
 
-/* Set stackpointer in internal RAM to call board_init_f */
-call_board_init_f:
-	ldr	sp, =(CONFIG_SYS_INIT_SP_ADDR)
-	bic	sp, sp, #7 /* 8-byte alignment for ABI compliance */
-	ldr	r0, =0x00000000
-	bl	board_init_f
+	bl	_main
 
 /*------------------------------------------------------------------------------*/
 #ifndef CONFIG_SPL_BUILD
@@ -186,10 +181,6 @@ relocate_code:
 	mov	r5, r1	/* save addr of gd */
 	mov	r6, r2	/* save addr of destination */
 
-	/* Set up the stack						    */
-stack_setup:
-	mov	sp, r4
-
 /* Disable the Dcache RAM lock for stack now */
 #ifdef	CONFIG_CPU_PXA25X
 	bl	cpu_init_crit
@@ -198,7 +189,7 @@ stack_setup:
 	adr	r0, _start
 	cmp	r0, r6
 	moveq	r9, #0		/* no relocation. relocation offset(r9) = 0 */
-	beq	clear_bss		/* skip relocation */
+	beq	relocate_done		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
 	ldr	r3, _bss_start_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
@@ -250,48 +241,9 @@ fixnext:
 	blo	fixloop
 #endif
 
-clear_bss:
-#ifndef CONFIG_SPL_BUILD
-	ldr	r0, _bss_start_ofs
-	ldr	r1, _bss_end_ofs
-	mov	r4, r6			/* reloc addr */
-	add	r0, r0, r4
-	add	r1, r1, r4
-	mov	r2, #0x00000000		/* clear			    */
-
-clbss_l:cmp	r0, r1			/* clear loop... */
-	bhs	clbss_e			/* if reached end of bss, exit */
-	str	r2, [r0]
-	add	r0, r0, #4
-	b	clbss_l
-clbss_e:
-#endif	/* #ifndef CONFIG_SPL_BUILD */
+relocate_done:
 
-/*
- * We are done. Do not return, instead branch to second part of board
- * initialization, now running from RAM.
- */
-#ifdef CONFIG_ONENAND_SPL
-	ldr     r0, _onenand_boot_ofs
-	mov	pc, r0
-
-_onenand_boot_ofs:
-	.word onenand_boot
-#else
-jump_2_ram:
-	ldr	r0, _board_init_r_ofs
-	ldr     r1, _TEXT_BASE
-	add	lr, r0, r1
-	add	lr, lr, r9
-	/* setup parameters for board_init_r */
-	mov	r0, r5		/* gd_t */
-	mov	r1, r6		/* dest_addr */
-	/* jump to it ... */
-	mov	pc, lr
-
-_board_init_r_ofs:
-	.word board_init_r - _start
-#endif
+	bx	lr
 
 _rel_dyn_start_ofs:
 	.word __rel_dyn_start - _start
@@ -299,7 +251,14 @@ _rel_dyn_end_ofs:
 	.word __rel_dyn_end - _start
 _dynsym_start_ofs:
 	.word __dynsym_start - _start
+
 #endif
+
+	.globl	c_runtime_cpu_setup
+c_runtime_cpu_setup:
+
+	bx	lr
+
 /*
  *************************************************************************
  *
diff --git a/arch/arm/cpu/s3c44b0/start.S b/arch/arm/cpu/s3c44b0/start.S
index 323b923..4528c91 100644
--- a/arch/arm/cpu/s3c44b0/start.S
+++ b/arch/arm/cpu/s3c44b0/start.S
@@ -128,12 +128,7 @@ reset:
 	bl	lowlevel_init
 #endif
 
-/* Set stackpointer in internal RAM to call board_init_f */
-call_board_init_f:
-	ldr	sp, =(CONFIG_SYS_INIT_SP_ADDR)
-	bic	sp, sp, #7 /* 8-byte alignment for ABI compliance */
-	ldr	r0,=0x00000000
-	bl	board_init_f
+	bl	_main
 
 /*------------------------------------------------------------------------------*/
 
@@ -150,14 +145,10 @@ relocate_code:
 	mov	r5, r1	/* save addr of gd */
 	mov	r6, r2	/* save addr of destination */
 
-	/* Set up the stack						    */
-stack_setup:
-	mov	sp, r4
-
 	adr	r0, _start
 	cmp	r0, r6
 	moveq	r9, #0		/* no relocation. relocation offset(r9) = 0 */
-	beq	clear_bss		/* skip relocation */
+	beq	relocate_done		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
 	ldr	r3, _bss_start_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
@@ -209,42 +200,9 @@ fixnext:
 	blo	fixloop
 #endif
 
-clear_bss:
-#ifndef CONFIG_SPL_BUILD
-	ldr	r0, _bss_start_ofs
-	ldr	r1, _bss_end_ofs
-	mov	r4, r6			/* reloc addr */
-	add	r0, r0, r4
-	add	r1, r1, r4
-	mov	r2, #0x00000000		/* clear			    */
-
-clbss_l:cmp	r0, r1			/* clear loop... */
-	bhs	clbss_e			/* if reached end of bss, exit */
-	str	r2, [r0]
-	add	r0, r0, #4
-	b	clbss_l
-clbss_e:
-
-	bl coloured_LED_init
-	bl red_led_on
-#endif
+relocate_done:
 
-/*
- * We are done. Do not return, instead branch to second part of board
- * initialization, now running from RAM.
- */
-	ldr	r0, _board_init_r_ofs
-	adr	r1, _start
-	add	lr, r0, r1
-	add	lr, lr, r9
-	/* setup parameters for board_init_r */
-	mov	r0, r5		/* gd_t */
-	mov	r1, r6		/* dest_addr */
-	/* jump to it ... */
-	mov	pc, lr
-
-_board_init_r_ofs:
-	.word board_init_r - _start
+	bx	lr
 
 _rel_dyn_start_ofs:
 	.word __rel_dyn_start - _start
@@ -253,6 +211,11 @@ _rel_dyn_end_ofs:
 _dynsym_start_ofs:
 	.word __dynsym_start - _start
 
+	.globl	c_runtime_cpu_setup
+c_runtime_cpu_setup:
+
+	bx	lr
+
 /*
  *************************************************************************
  *
diff --git a/arch/arm/cpu/sa1100/start.S b/arch/arm/cpu/sa1100/start.S
index 1ea92d1..3144299 100644
--- a/arch/arm/cpu/sa1100/start.S
+++ b/arch/arm/cpu/sa1100/start.S
@@ -132,12 +132,7 @@ reset:
 	bl	cpu_init_crit
 #endif
 
-/* Set stackpointer in internal RAM to call board_init_f */
-call_board_init_f:
-	ldr	sp, =(CONFIG_SYS_INIT_SP_ADDR)
-	bic	sp, sp, #7 /* 8-byte alignment for ABI compliance */
-	ldr	r0,=0x00000000
-	bl	board_init_f
+	bl	_main
 
 /*------------------------------------------------------------------------------*/
 
@@ -154,14 +149,10 @@ relocate_code:
 	mov	r5, r1	/* save addr of gd */
 	mov	r6, r2	/* save addr of destination */
 
-	/* Set up the stack						    */
-stack_setup:
-	mov	sp, r4
-
 	adr	r0, _start
 	cmp	r0, r6
 	moveq	r9, #0		/* no relocation. relocation offset(r9) = 0 */
-	beq	clear_bss		/* skip relocation */
+	beq	relocate_done		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
 	ldr	r3, _bss_start_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
@@ -213,40 +204,10 @@ fixnext:
 	blo	fixloop
 #endif
 
-clear_bss:
-#ifndef CONFIG_SPL_BUILD
-	ldr	r0, _bss_start_ofs
-	ldr	r1, _bss_end_ofs
-	mov	r4, r6			/* reloc addr */
-	add	r0, r0, r4
-	add	r1, r1, r4
-	mov	r2, #0x00000000		/* clear			    */
-
-clbss_l:cmp	r0, r1			/* clear loop... */
-	bhs	clbss_e			/* if reached end of bss, exit */
-	str	r2, [r0]
-	add	r0, r0, #4
-	b	clbss_l
-clbss_e:
-#endif
+relocate_done:
 
-/*
- * We are done. Do not return, instead branch to second part of board
- * initialization, now running from RAM.
- */
-	ldr	r0, _board_init_r_ofs
-	adr	r1, _start
-	add	lr, r0, r1
-	add	lr, lr, r9
-	/* setup parameters for board_init_r */
-	mov	r0, r5		/* gd_t */
-	mov	r1, r6		/* dest_addr */
-	/* jump to it ... */
 	mov	pc, lr
 
-_board_init_r_ofs:
-	.word board_init_r - _start
-
 _rel_dyn_start_ofs:
 	.word __rel_dyn_start - _start
 _rel_dyn_end_ofs:
@@ -254,6 +215,11 @@ _rel_dyn_end_ofs:
 _dynsym_start_ofs:
 	.word __dynsym_start - _start
 
+	.globl	c_runtime_cpu_setup
+c_runtime_cpu_setup:
+
+	mov	pc, lr
+
 /*
  *************************************************************************
  *