consolidate arch/arm/cpu/start-arm920t.S and arch/arm/cpu/start-arm926ejs.S

3 files changed, 14 insertions, 407 deletions

diff --git a/arch/arm/cpu/Makefile b/arch/arm/cpu/Makefile
index 4670c8b696..46ba6ac073 100644
--- a/arch/arm/cpu/Makefile
+++ b/arch/arm/cpu/Makefile
@@ -1,4 +1,10 @@
 obj-y += cpu.o
 obj-y += interrupts.o
-obj-y += start-arm920t.o
 
+#
+# start-arm920t.S and start-arm926ejs.S have been
+# merged to start-arm920t.S. More start-*.S should
+# be merged here and finally called start-arm.S
+#
+extra-$(CONFIG_ARM920T) += start-arm920t.o
+extra-$(CONFIG_ARM926EJS) += start-arm920t.o
diff --git a/arch/arm/cpu/start-arm920t.S b/arch/arm/cpu/start-arm920t.S
index 111f1bd3b8..3fd4528a8f 100644
--- a/arch/arm/cpu/start-arm920t.S
+++ b/arch/arm/cpu/start-arm920t.S
@@ -27,7 +27,6 @@
 
 #include <config.h>
 
-
 /*
  *************************************************************************
  *
@@ -36,10 +35,9 @@
  *************************************************************************
  */
 
-	.section ".text_entry","ax"
-
 .globl _start
-_start:	b       reset
+_start:
+	b       reset
 	ldr	pc, _undefined_instruction
 	ldr	pc, _software_interrupt
 	ldr	pc, _prefetch_abort
@@ -58,16 +56,15 @@ _fiq:			.word fiq
 
 	.balignl 16,0xdeadbeef
 
-
 /*
  *************************************************************************
  *
  * Startup Code (reset vector)
  *
  * do important init only if we don't start from memory!
+ * setup Memory and board specific bits prior to relocation.
  * relocate armboot to ram
  * setup stack
- * jump to second stage
  *
  *************************************************************************
  */
@@ -203,7 +200,6 @@ clbss_l:str	r2, [r0]		/* clear loop...                    */
 	cmp	r0, r1
 	ble	clbss_l
 
-
 	ldr	pc, _start_armboot
 
 _start_armboot:	.word start_uboot
@@ -220,7 +216,6 @@ _start_armboot:	.word start_uboot
  *************************************************************************
  */
 
-
 #ifndef CONFIG_SKIP_LOWLEVEL_INIT
 cpu_init_crit:
 	/*
@@ -234,10 +229,10 @@ cpu_init_crit:
 	 * disable MMU stuff and caches
 	 */
 	mrc	p15, 0, r0, c1, c0, 0
-	bic	r0, r0, #0x00002300	@ clear bits 13, 9:8 (--V- --RS)
-	bic	r0, r0, #0x00000087	@ clear bits 7, 2:0 (B--- -CAM)
-	orr	r0, r0, #0x00000002	@ set bit 2 (A) Align
-	orr	r0, r0, #0x00001000	@ set bit 12 (I) I-Cache
+	bic	r0, r0, #0x00002300	/* clear bits 13, 9:8 (--V- --RS) */
+	bic	r0, r0, #0x00000087	/* clear bits 7, 2:0 (B--- -CAM) */
+	orr	r0, r0, #0x00000002	/* set bit 2 (A) Align */
+	orr	r0, r0, #0x00001000	/* set bit 12 (I) I-Cache */
 	mcr	p15, 0, r0, c1, c0, 0
 
 	/*
diff --git a/arch/arm/cpu/start-arm926ejs.S b/arch/arm/cpu/start-arm926ejs.S
deleted file mode 100644
index 725c6639a1..0000000000
--- a/arch/arm/cpu/start-arm926ejs.S
+++ /dev/null
@@ -1,394 +0,0 @@
-/*
- *  armboot - Startup Code for ARM926EJS CPU-core
- *
- *  Copyright (c) 2003  Texas Instruments
- *
- *  ----- Adapted for OMAP1610 OMAP730 from ARM925t code ------
- *
- *  Copyright (c) 2001	Marius Gröger <mag@sysgo.de>
- *  Copyright (c) 2002	Alex Züpke <azu@sysgo.de>
- *  Copyright (c) 2002	Gary Jennejohn <gj@denx.de>
- *  Copyright (c) 2003	Richard Woodruff <r-woodruff2@ti.com>
- *  Copyright (c) 2003	Kshitij <kshitij@ti.com>
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * 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.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-
-#include <config.h>
-#include <version.h>
-
-#if defined(CONFIG_OMAP1610)
-#include <./configs/omap1510.h>
-#elif defined(CONFIG_OMAP730)
-#include <./configs/omap730.h>
-#endif
-
-/*
- *************************************************************************
- *
- * Jump vector table as in table 3.1 in [1]
- *
- *************************************************************************
- */
-
-
-.globl _start
-_start:
-	b	reset
-	ldr	pc, _undefined_instruction
-	ldr	pc, _software_interrupt
-	ldr	pc, _prefetch_abort
-	ldr	pc, _data_abort
-	ldr	pc, _not_used
-	ldr	pc, _irq
-	ldr	pc, _fiq
-
-_undefined_instruction:
-	.word undefined_instruction
-_software_interrupt:
-	.word software_interrupt
-_prefetch_abort:
-	.word prefetch_abort
-_data_abort:
-	.word data_abort
-_not_used:
-	.word not_used
-_irq:
-	.word irq
-_fiq:
-	.word fiq
-
-	.balignl 16,0xdeadbeef
-
-
-/*
- *************************************************************************
- *
- * Startup Code (reset vector)
- *
- * do important init only if we don't start from memory!
- * setup Memory and board specific bits prior to relocation.
- * relocate armboot to ram
- * setup stack
- *
- *************************************************************************
- */
-
-_TEXT_BASE:
-	.word	TEXT_BASE
-
-.globl _armboot_start
-_armboot_start:
-	.word _start
-
-/*
- * These are defined in the board-specific linker script.
- */
-.globl _bss_start
-_bss_start:
-	.word __bss_start
-
-.globl _bss_end
-_bss_end:
-	.word _end
-
-#ifdef CONFIG_USE_IRQ
-/* IRQ stack memory (calculated at run-time) */
-.globl IRQ_STACK_START
-IRQ_STACK_START:
-	.word	0x0badc0de
-
-/* IRQ stack memory (calculated at run-time) */
-.globl FIQ_STACK_START
-FIQ_STACK_START:
-	.word 0x0badc0de
-#endif
-
-
-/*
- * the actual reset code
- */
-
-reset:
-	/*
-	 * set the cpu to SVC32 mode
-	 */
-	mrs	r0,cpsr
-	bic	r0,r0,#0x1f
-	orr	r0,r0,#0xd3
-	msr	cpsr,r0
-
-	/*
-	 * we do sys-critical inits only at reboot,
-	 * not when booting from ram!
-	 */
-#ifndef CONFIG_SKIP_LOWLEVEL_INIT
-	bl	cpu_init_crit
-#endif
-
-#ifndef CONFIG_SKIP_RELOCATE_UBOOT
-relocate:				/* relocate U-Boot to RAM	    */
-	adr	r0, _start		/* r0 <- current position of code   */
-	ldr	r1, _TEXT_BASE		/* test if we run from flash or RAM */
-	cmp     r0, r1                  /* don't reloc during debug         */
-	beq     stack_setup
-
-	ldr	r2, _armboot_start
-	ldr	r3, _bss_start
-	sub	r2, r3, r2		/* r2 <- size of armboot            */
-	add	r2, r0, r2		/* r2 <- source end address         */
-
-copy_loop:
-	ldmia	r0!, {r3-r10}		/* copy from source address [r0]    */
-	stmia	r1!, {r3-r10}		/* copy to   target address [r1]    */
-	cmp	r0, r2			/* until source end addreee [r2]    */
-	ble	copy_loop
-#endif	/* CONFIG_SKIP_RELOCATE_UBOOT */
-
-	/* Set up the stack						    */
-stack_setup:
-	ldr	r0, _TEXT_BASE		/* upper 128 KiB: relocated uboot   */
-	sub	r0, r0, #CFG_MALLOC_LEN	/* malloc area                      */
-	sub	r0, r0, #CFG_GBL_DATA_SIZE /* bdinfo                        */
-#ifdef CONFIG_USE_IRQ
-	sub	r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
-#endif
-	sub	sp, r0, #12		/* leave 3 words for abort-stack    */
-
-clear_bss:
-	ldr	r0, _bss_start		/* find start of bss segment        */
-	ldr	r1, _bss_end		/* stop here                        */
-	mov 	r2, #0x00000000		/* clear                            */
-
-clbss_l:str	r2, [r0]		/* clear loop...                    */
-	add	r0, r0, #4
-	cmp	r0, r1
-	ble	clbss_l
-
-	ldr	pc, _start_armboot
-
-_start_armboot:
-	.word start_armboot
-
-
-/*
- *************************************************************************
- *
- * CPU_init_critical registers
- *
- * setup important registers
- * setup memory timing
- *
- *************************************************************************
- */
-
-
-cpu_init_crit:
-	/*
-	 * flush v4 I/D caches
-	 */
-	mov	r0, #0
-	mcr	p15, 0, r0, c7, c7, 0	/* flush v3/v4 cache */
-	mcr	p15, 0, r0, c8, c7, 0	/* flush v4 TLB */
-
-	/*
-	 * disable MMU stuff and caches
-	 */
-	mrc	p15, 0, r0, c1, c0, 0
-	bic	r0, r0, #0x00002300	/* clear bits 13, 9:8 (--V- --RS) */
-	bic	r0, r0, #0x00000087	/* clear bits 7, 2:0 (B--- -CAM) */
-	orr	r0, r0, #0x00000002	/* set bit 2 (A) Align */
-	orr	r0, r0, #0x00001000	/* set bit 12 (I) I-Cache */
-	mcr	p15, 0, r0, c1, c0, 0
-
-	/*
-	 * Go setup Memory and board specific bits prior to relocation.
-	 */
-	mov	ip, lr		/* perserve link reg across call */
-	bl	lowlevel_init	/* go setup pll,mux,memory */
-	mov	lr, ip		/* restore link */
-	mov	pc, lr		/* back to my caller */
-/*
- *************************************************************************
- *
- * Interrupt handling
- *
- *************************************************************************
- */
-
-@
-@ IRQ stack frame.
-@
-#define S_FRAME_SIZE	72
-
-#define S_OLD_R0	68
-#define S_PSR		64
-#define S_PC		60
-#define S_LR		56
-#define S_SP		52
-
-#define S_IP		48
-#define S_FP		44
-#define S_R10		40
-#define S_R9		36
-#define S_R8		32
-#define S_R7		28
-#define S_R6		24
-#define S_R5		20
-#define S_R4		16
-#define S_R3		12
-#define S_R2		8
-#define S_R1		4
-#define S_R0		0
-
-#define MODE_SVC 0x13
-#define I_BIT	 0x80
-
-/*
- * use bad_save_user_regs for abort/prefetch/undef/swi ...
- * use irq_save_user_regs / irq_restore_user_regs for IRQ/FIQ handling
- */
-
-	.macro	bad_save_user_regs
-	@ carve out a frame on current user stack
-	sub	sp, sp, #S_FRAME_SIZE
-	stmia	sp, {r0 - r12}	@ Save user registers (now in svc mode) r0-r12
-
-	ldr	r2, _armboot_start
-	sub	r2, r2, #(CONFIG_STACKSIZE+CFG_MALLOC_LEN)
-	sub	r2, r2, #(CFG_GBL_DATA_SIZE+8)  @ set base 2 words into abort stack
-	@ get values for "aborted" pc and cpsr (into parm regs)
-	ldmia	r2, {r2 - r3}
-	add	r0, sp, #S_FRAME_SIZE		@ grab pointer to old stack
-	add	r5, sp, #S_SP
-	mov	r1, lr
-	stmia	r5, {r0 - r3}	@ save sp_SVC, lr_SVC, pc, cpsr
-	mov	r0, sp		@ save current stack into r0 (param register)
-	.endm
-
-	.macro	irq_save_user_regs
-	sub	sp, sp, #S_FRAME_SIZE
-	stmia	sp, {r0 - r12}			@ Calling r0-r12
-	@ !!!! R8 NEEDS to be saved !!!! a reserved stack spot would be good.
-	add	r8, sp, #S_PC
-	stmdb	r8, {sp, lr}^		@ Calling SP, LR
-	str	lr, [r8, #0]		@ Save calling PC
-	mrs	r6, spsr
-	str	r6, [r8, #4]		@ Save CPSR
-	str	r0, [r8, #8]		@ Save OLD_R0
-	mov	r0, sp
-	.endm
-
-	.macro	irq_restore_user_regs
-	ldmia	sp, {r0 - lr}^			@ Calling r0 - lr
-	mov	r0, r0
-	ldr	lr, [sp, #S_PC]			@ Get PC
-	add	sp, sp, #S_FRAME_SIZE
-	subs	pc, lr, #4		@ return & move spsr_svc into cpsr
-	.endm
-
-	.macro get_bad_stack
-	ldr	r13, _armboot_start		@ setup our mode stack
-	sub	r13, r13, #(CONFIG_STACKSIZE+CFG_MALLOC_LEN)
-	sub	r13, r13, #(CFG_GBL_DATA_SIZE+8) @ reserved a couple spots in abort stack
-
-	str	lr, [r13]	@ save caller lr in position 0 of saved stack
-	mrs	lr, spsr	@ get the spsr
-	str	lr, [r13, #4]	@ save spsr in position 1 of saved stack
-	mov	r13, #MODE_SVC	@ prepare SVC-Mode
-	@ msr	spsr_c, r13
-	msr	spsr, r13	@ switch modes, make sure moves will execute
-	mov	lr, pc		@ capture return pc
-	movs	pc, lr		@ jump to next instruction & switch modes.
-	.endm
-
-	.macro get_irq_stack			@ setup IRQ stack
-	ldr	sp, IRQ_STACK_START
-	.endm
-
-	.macro get_fiq_stack			@ setup FIQ stack
-	ldr	sp, FIQ_STACK_START
-	.endm
-
-/*
- * exception handlers
- */
-	.align  5
-undefined_instruction:
-	get_bad_stack
-	bad_save_user_regs
-	bl	do_undefined_instruction
-
-	.align	5
-software_interrupt:
-	get_bad_stack
-	bad_save_user_regs
-	bl	do_software_interrupt
-
-	.align	5
-prefetch_abort:
-	get_bad_stack
-	bad_save_user_regs
-	bl	do_prefetch_abort
-
-	.align	5
-data_abort:
-	get_bad_stack
-	bad_save_user_regs
-	bl	do_data_abort
-
-	.align	5
-not_used:
-	get_bad_stack
-	bad_save_user_regs
-	bl	do_not_used
-
-#ifdef CONFIG_USE_IRQ
-
-	.align	5
-irq:
-	get_irq_stack
-	irq_save_user_regs
-	bl 	do_irq
-	irq_restore_user_regs
-
-	.align	5
-fiq:
-	get_fiq_stack
-	/* someone ought to write a more effiction fiq_save_user_regs */
-	irq_save_user_regs
-	bl 	do_fiq
-	irq_restore_user_regs
-
-#else
-
-	.align	5
-irq:
-	get_bad_stack
-	bad_save_user_regs
-	bl	do_irq
-
-	.align	5
-fiq:
-	get_bad_stack
-	bad_save_user_regs
-	bl	do_fiq
-
-#endif