X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=cpu%2Farm926ejs%2Fstart.S;h=3b81151f49cecaa0b42875ed031b8e3f313cc1c6;hb=8f0fec74ac6d0f3a7134ccebafa1ed9bd8c712ba;hp=297efe07c26fd5d50674f4060f0685ab2e371b8d;hpb=5db6138565ad4da190f94e0bc1d89407d58a2ab2;p=oweals%2Fu-boot.git

diff --git a/cpu/arm926ejs/start.S b/cpu/arm926ejs/start.S
index 297efe07c2..3b81151f49 100644
--- a/cpu/arm926ejs/start.S
+++ b/cpu/arm926ejs/start.S
@@ -7,7 +7,7 @@
  *
  *  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) 2002	Gary Jennejohn <garyj@denx.de>
  *  Copyright (c) 2003	Richard Woodruff <r-woodruff2@ti.com>
  *  Copyright (c) 2003	Kshitij <kshitij@ti.com>
  *
@@ -32,6 +32,7 @@
 
 
 #include <config.h>
+#include <common.h>
 #include <version.h>
 
 #if defined(CONFIG_OMAP1610)
@@ -52,6 +53,27 @@
 .globl _start
 _start:
 	b	reset
+#ifdef CONFIG_PRELOADER
+/* No exception handlers in preloader */
+	ldr	pc, _hang
+	ldr	pc, _hang
+	ldr	pc, _hang
+	ldr	pc, _hang
+	ldr	pc, _hang
+	ldr	pc, _hang
+	ldr	pc, _hang
+
+_hang:
+	.word	do_hang
+/* pad to 64 byte boundary */
+	.word	0x12345678
+	.word	0x12345678
+	.word	0x12345678
+	.word	0x12345678
+	.word	0x12345678
+	.word	0x12345678
+	.word	0x12345678
+#else
 	ldr	pc, _undefined_instruction
 	ldr	pc, _software_interrupt
 	ldr	pc, _prefetch_abort
@@ -75,6 +97,7 @@ _irq:
 _fiq:
 	.word fiq
 
+#endif	/* CONFIG_PRELOADER */
 	.balignl 16,0xdeadbeef
 
 
@@ -149,7 +172,6 @@ relocate:				/* relocate U-Boot to RAM	    */
 	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            */
@@ -165,18 +187,23 @@ copy_loop:
 	/* 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                        */
+	sub	sp, r0, #128		/* leave 32 words for abort-stack   */
+#ifndef CONFIG_PRELOADER
+	sub	r0, r0, #CONFIG_SYS_MALLOC_LEN	/* malloc area                      */
+	sub	r0, r0, #CONFIG_SYS_GBL_DATA_SIZE /* bdinfo                        */
 #ifdef CONFIG_USE_IRQ
 	sub	r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
 #endif
+#endif /* CONFIG_PRELOADER */
 	sub	sp, r0, #12		/* leave 3 words for abort-stack    */
+	bic	sp, r0, #7		/* 8-byte align stack for ABI compliance */
 
 clear_bss:
 	ldr	r0, _bss_start		/* find start of bss segment        */
 	ldr	r1, _bss_end		/* stop here                        */
-	mov 	r2, #0x00000000		/* clear                            */
+	mov	r2, #0x00000000		/* clear                            */
 
+#ifndef CONFIG_PRELOADER
 clbss_l:str	r2, [r0]		/* clear loop...                    */
 	add	r0, r0, #4
 	cmp	r0, r1
@@ -184,11 +211,16 @@ clbss_l:str	r2, [r0]		/* clear loop...                    */
 
 	bl coloured_LED_init
 	bl red_LED_on
+#endif /* CONFIG_PRELOADER */
 
 	ldr	pc, _start_armboot
 
 _start_armboot:
+#ifdef CONFIG_NAND_SPL
+	.word nand_boot
+#else
 	.word start_armboot
+#endif /* CONFIG_NAND_SPL */
 
 
 /*
@@ -229,6 +261,7 @@ cpu_init_crit:
 	mov	pc, lr		/* back to my caller */
 #endif /* CONFIG_SKIP_LOWLEVEL_INIT */
 
+#ifndef CONFIG_PRELOADER
 /*
  *************************************************************************
  *
@@ -276,8 +309,8 @@ cpu_init_crit:
 	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
+	sub	r2, r2, #(CONFIG_STACKSIZE+CONFIG_SYS_MALLOC_LEN)
+	sub	r2, r2, #(CONFIG_SYS_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
@@ -310,8 +343,8 @@ cpu_init_crit:
 
 	.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
+	sub	r13, r13, #(CONFIG_STACKSIZE+CONFIG_SYS_MALLOC_LEN)
+	sub	r13, r13, #(CONFIG_SYS_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
@@ -330,10 +363,18 @@ cpu_init_crit:
 	.macro get_fiq_stack			@ setup FIQ stack
 	ldr	sp, FIQ_STACK_START
 	.endm
+#endif	/* CONFIG_PRELOADER */
 
 /*
  * exception handlers
  */
+#ifdef CONFIG_PRELOADER
+	.align	5
+do_hang:
+	ldr	sp, _TEXT_BASE			/* switch to abort stack */
+1:
+	bl	1b				/* hang and never return */
+#else	/* !CONFIG_PRELOADER */
 	.align  5
 undefined_instruction:
 	get_bad_stack
@@ -370,7 +411,7 @@ not_used:
 irq:
 	get_irq_stack
 	irq_save_user_regs
-	bl 	do_irq
+	bl	do_irq
 	irq_restore_user_regs
 
 	.align	5
@@ -378,7 +419,7 @@ fiq:
 	get_fiq_stack
 	/* someone ought to write a more effiction fiq_save_user_regs */
 	irq_save_user_regs
-	bl 	do_fiq
+	bl	do_fiq
 	irq_restore_user_regs
 
 #else
@@ -396,3 +437,4 @@ fiq:
 	bl	do_fiq
 
 #endif
+#endif	/* CONFIG_PRELOADER */