add neo_gta02.h lowlevel_init.S kboot-stage1.lds

qiboot/src/Makefile

@@ -14,18 +14,16 @@
 # MA 02111-1307 USA
 #
 
-
+LDS		=kboot-stage1.lds
-
-TEXT_BASE	=0x0000000
-
 INCLUDE		=../include
 IMAGE		=../image
-CFLAGS		=-I $(INCLUDE) -g -c -o
+CFLAGS		=-Wall -I $(INCLUDE) -g -c -o
 
-all:led.S led.c
+all:led.S led.c lowlevel_init.S
 	$(CC) $(CFLAGS) led_S.o led.S
 	$(CC) $(CFLAGS) led_C.o led.c
-	$(LD) -Ttext $(TEXT_BASE) -g led_S.o led_C.o  -o led.o
+	$(CC) $(CFLAGS) lowlevel_init.o lowlevel_init.S
+	$(LD) -T$(LDS) -g led_S.o led_C.o lowlevel_init.o -o led.o
 	$(OBJCOPY) -O binary -S led.o $(IMAGE)/led_on 
 
 clean:

qiboot/src/kboot.lds

@@ -1,53 +0,0 @@
-/*
- * (C) Copyright 2002
- * Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
- *
- * 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
- */
-
-OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
-/*OUTPUT_FORMAT("elf32-arm", "elf32-arm", "elf32-arm")*/
-OUTPUT_ARCH(arm)
-ENTRY(_start)
-SECTIONS
-{
-	. = 0x00000000;
-
-	. = ALIGN(4);
-	.text      :
-	{
-	  led_S.o	(.text)
-	  led_C.o (.text)
-	  *(.text)
-	}
-
-	. = ALIGN(4);
-	.rodata : { *(.rodata) }
-
-	. = ALIGN(4);
-	.data : { *(.data) }
-
-	. = ALIGN(4);
-	.got : { *(.got) }
-
-	. = ALIGN(4);
-	__bss_start = .;
-	.bss (NOLOAD) : { *(.bss) }
-	_end = .;
-}

qiboot/src/led.S

@@ -1,5 +1,57 @@
+
+#include <neo_gta02.h>
 .globl _start
 _start:	b       start_code
+/*	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
+*/
+
+_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
+
+
 
 start_code:	
 
@@ -65,8 +117,28 @@ start_code:
 	mov	r1, #0x1a
 	str	r1, [r0, #0x28]
 
+	bl	cpu_init_crit
+
+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
+
 	/* blink led */
-	ldr	sp,=1024*4
 .extern blink_led
 	bl	blink_led
 
@@ -76,3 +148,47 @@ delay:
 	bne	delay
 	mov	pc,lr
 
+
+
+/*
+ *************************************************************************
+ *
+ * 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
+
+	/*
+	 * before relocating, we have to setup RAM timing
+	 * because memory timing is board-dependend, you will
+	 * find a lowlevel_init.S in your board directory.
+	 */
+	mov	ip, lr
+ 
+/*	bl	lowlevel_init*/
+
+	mov	lr, ip
+	mov	pc, lr
+
+