mirror of
git://projects.qi-hardware.com/xburst-tools.git
synced 2024-12-23 13:30:48 +02:00
blink led all in c code, start add read nand code
This commit is contained in:
xiangfu
parent
474787a501
commit
c382c5066c
@ -7,5 +7,6 @@ AS = $(CROSS_COMPILE)as
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LD = $(CROSS_COMPILE)ld
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CC = $(CROSS_COMPILE)gcc
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OBJCOPY = $(CROSS_COMPILE)objcopy
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OBJDUMP = $(CROSS_COMPILE)objdump
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export CROSS_COMPILE AD LD CC OBJCOPY
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export CROSS_COMPILE AD LD CC OBJCOPY OBJDUMP
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@ -1,11 +1,8 @@
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/*
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* (C) Copyright 2007 OpenMoko, Inc.
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* Author: Harald Welte <laforge@openmoko.org>
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* Author: xiangfu liu <xiangfu@openmoko.org>
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*
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* Configuation settings for the FIC Neo1973 GTA02 Linux GSM phone
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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* Configuation settings for the FIC Neo GTA02 Linux GSM phone
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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@ -26,14 +23,6 @@
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#ifndef __CONFIG_H
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#define __CONFIG_H
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#define TEXT_BASE 0x00000000 /* xiangfu add*/
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#define CFG_ENV_SIZE 0x40000 /* 128k Total Size of Environment Sector */
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/*
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* Size of malloc() pool
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*/
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#define CFG_MALLOC_LEN (CFG_ENV_SIZE + 400*1024)
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/* >> CFG_VIDEO_LOGO_MAX_SIZE */
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#define CFG_GBL_DATA_SIZE 128 /* size in bytes reserved for initial data */
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#define TEXT_BASE 0x33F80000 /* xiangfu add*/
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#endif /* __CONFIG_H */
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@ -19,11 +19,11 @@ INCLUDE =../include
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IMAGE =../image
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CFLAGS =-Wall -I $(INCLUDE) -g -c -o
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all:led.S led.c lowlevel_init.S
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$(CC) $(CFLAGS) led_S.o led.S
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$(CC) $(CFLAGS) led_C.o led.c
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all:start.S blink_led.c lowlevel_init.S
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$(CC) $(CFLAGS) start.o start.S
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$(CC) $(CFLAGS) blink_led.o blink_led.c
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$(CC) $(CFLAGS) lowlevel_init.o lowlevel_init.S
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$(LD) -T$(LDS) -g led_S.o led_C.o lowlevel_init.o -o led.o
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$(LD) -T$(LDS) -g start.o blink_led.o lowlevel_init.o -o led.o
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$(OBJCOPY) -O binary -S led.o $(IMAGE)/led_on
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clean:
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55
qiboot/src/blink_led.c
Normal file
55
qiboot/src/blink_led.c
Normal file
@ -0,0 +1,55 @@
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/*
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* (C) Copyright 2007 OpenMoko, Inc.
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* Author: xiangfu liu <xiangfu@openmoko.org>
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*
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* Configuation settings for the FIC Neo GTA02 Linux GSM phone
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#define GPBCON (*(volatile unsigned *)0x56000010)
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#define GPBDAT (*(volatile unsigned *)0x56000014)
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#define GPBDW (*(volatile unsigned *)0x56000018)
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#define LED3_ON() (GPBDAT &= ~(0x1))
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#define LED4_ON() (GPBDAT &= ~(0x2))
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#define LED3_OFF() (GPBDAT |= (0x1))
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#define LED4_OFF() (GPBDAT |= (0x2))
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int delay(int time)
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{
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int i=0;
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for(i=0;i<time;i++);
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return 0;
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}
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int blink_led()
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{
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GPBCON = 0x5;
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GPBDW = 0xffff;
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while(1)
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{
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LED3_ON();
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delay(0xfffff);
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LED3_OFF() ;
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delay(0xfffff);
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LED4_ON();
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delay(0xfffff);
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LED4_OFF();
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delay(0xfffff);
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}
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return 0;
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}
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@ -32,8 +32,9 @@ SECTIONS
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. = ALIGN(4);
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.text :
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{
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led_S.o (.text)
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led_C.o (.text)
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start.o (.text)
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lowlevel_init.o(.text)
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blink_led.o (.text)
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*(.text)
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}
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@ -48,6 +49,6 @@ SECTIONS
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. = ALIGN(4);
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__bss_start = .;
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.bss (NOLOAD) : { *(.bss) }
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.bss : { *(.bss) }
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_end = .;
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}
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194
qiboot/src/led.S
194
qiboot/src/led.S
@ -1,194 +0,0 @@
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#include <neo_gta02.h>
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.globl _start
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_start: b start_code
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/* ldr pc, _undefined_instruction
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ldr pc, _software_interrupt
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ldr pc, _prefetch_abort
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ldr pc, _data_abort
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ldr pc, _not_used
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ldr pc, _irq
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ldr pc, _fiq
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_undefined_instruction: .word undefined_instruction
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_software_interrupt: .word software_interrupt
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_prefetch_abort: .word prefetch_abort
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_data_abort: .word data_abort
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_not_used: .word not_used
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_irq: .word irq
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_fiq: .word fiq
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.balignl 16,0xdeadbeef
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*/
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_TEXT_BASE:
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.word TEXT_BASE
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.globl _armboot_start
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_armboot_start:
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.word _start
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/*
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* These are defined in the board-specific linker script.
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*/
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.globl _bss_start
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_bss_start:
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.word __bss_start
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.globl _bss_end
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_bss_end:
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.word _end
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#ifdef CONFIG_USE_IRQ
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/* IRQ stack memory (calculated at run-time) */
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.globl IRQ_STACK_START
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IRQ_STACK_START:
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.word 0x0badc0de
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/* IRQ stack memory (calculated at run-time) */
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.globl FIQ_STACK_START
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FIQ_STACK_START:
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.word 0x0badc0de
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#endif
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start_code:
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/*
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* set the cpu to SVC32 mode
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*/
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mrs r0,cpsr
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bic r0,r0,#0x1f
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orr r0,r0,#0xd3
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msr cpsr,r0
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/* turn off the watchdog */
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# define pWTCON 0x53000000
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# define INTMSK 0x4A000008 /* Interupt-Controller base addresses */
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# define INTSUBMSK 0x4A00001C
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# define INTSUBMSK_val 0xffff
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# define CAMDIVN 0x4C000018
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ldr r0, =pWTCON
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mov r1, #0x0
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str r1, [r0]
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/*
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* mask all IRQs by setting all bits in the INTMR - default
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*/
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mov r1, #0xffffffff
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ldr r0, =INTMSK
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str r1, [r0]
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ldr r1, =INTSUBMSK_val
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ldr r0, =INTSUBMSK
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str r1, [r0]
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/* Make sure we get FCLK:HCLK:PCLK = 1:3:6 */
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ldr r0, =CAMDIVN
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mov r1, #0
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str r1, [r0]
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/* Clock asynchronous mode */
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mrc p15, 0, r1, c1, c0, 0
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orr r1, r1, #0xc0000000
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mcr p15, 0, r1, c1, c0, 0
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/* enable uart */
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ldr r0, =0x4c00000c /* clkcon */
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ldr r1, =0x7fff0 /* all clocks on */
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str r1, [r0]
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/* gpio UART0 init */
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ldr r0, =0x56000070
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mov r1, #0xaa
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str r1, [r0]
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/* init uart */
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ldr r0, =0x50000000
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mov r1, #0x03
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str r1, [r0]
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ldr r1, =0x245
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str r1, [r0, #0x04]
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mov r1, #0x01
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str r1, [r0, #0x08]
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mov r1, #0x00
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str r1, [r0, #0x0c]
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mov r1, #0x1a
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str r1, [r0, #0x28]
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bl cpu_init_crit
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stack_setup:
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ldr r0, _TEXT_BASE /* upper 128 KiB: relocated uboot */
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sub r0, r0, #CFG_MALLOC_LEN /* malloc area */
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sub r0, r0, #CFG_GBL_DATA_SIZE /* bdinfo */
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#ifdef CONFIG_USE_IRQ
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sub r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
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#endif
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sub sp, r0, #12 /* leave 3 words for abort-stack */
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clear_bss:
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ldr r0, _bss_start /* find start of bss segment */
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ldr r1, _bss_end /* stop here */
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mov r2, #0x00000000 /* clear */
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clbss_l:str r2, [r0] /* clear loop... */
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add r0, r0, #4
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cmp r0, r1
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ble clbss_l
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/* blink led */
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.extern blink_led
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bl blink_led
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.global delay
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delay:
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subs r0,r0,#0x1
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bne delay
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mov pc,lr
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/*
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*************************************************************************
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*
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* CPU_init_critical registers
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*
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* setup important registers
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* setup memory timing
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*
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*************************************************************************
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*/
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cpu_init_crit:
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/*
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* flush v4 I/D caches
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*/
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mov r0, #0
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mcr p15, 0, r0, c7, c7, 0 /* flush v3/v4 cache */
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mcr p15, 0, r0, c8, c7, 0 /* flush v4 TLB */
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/*
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* disable MMU stuff and caches
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*/
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mrc p15, 0, r0, c1, c0, 0
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bic r0, r0, #0x00002300 @ clear bits 13, 9:8 (--V- --RS)
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bic r0, r0, #0x00000087 @ clear bits 7, 2:0 (B--- -CAM)
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orr r0, r0, #0x00000002 @ set bit 2 (A) Align
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orr r0, r0, #0x00001000 @ set bit 12 (I) I-Cache
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mcr p15, 0, r0, c1, c0, 0
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/*
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* before relocating, we have to setup RAM timing
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* because memory timing is board-dependend, you will
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* find a lowlevel_init.S in your board directory.
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*/
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mov ip, lr
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bl lowlevel_init
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mov lr, ip
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mov pc, lr
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@ -1,29 +0,0 @@
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#define GPBCON (*(volatile unsigned *)0x56000010)
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#define GPBDAT (*(volatile unsigned *)0x56000014)
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#define GPBDW (*(volatile unsigned *)0x56000018)
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#define LED3_ON() (GPBDAT &= ~(0x1))
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#define LED4_ON() (GPBDAT &= ~(0x2))
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#define LED3_OFF() (GPBDAT |= (0x1))
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#define LED4_OFF() (GPBDAT |= (0x2))
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extern void delay(int time);
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int blink_led()
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{
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GPBCON = 0x5;
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GPBDW = 0xffff;
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while(1)
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{
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LED3_ON();
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delay(0xffff);
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LED3_OFF() ;
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delay(0xffff);
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LED4_ON();
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delay(0xffff);
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LED4_OFF();
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delay(0xffff);
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}
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return 1;
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}
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@ -1,14 +1,8 @@
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/*
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* Memory Setup stuff - taken from blob memsetup.S
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*
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* Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl) and
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* Jan-Derk Bakker (J.D.Bakker@its.tudelft.nl)
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*
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* Modified for the FIC Neo1973 GTA01 by Harald Welte <laforge@openmoko.org>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
|
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* modify it under the terms of the GNU General Public License as
|
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* published by the Free Software Foundation; either version 2 of
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@ -26,11 +20,10 @@
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*/
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/*
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* #include <config.h>
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* #include <version.h>
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*/
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* #include <config.h>
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* #include <version.h>
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*/
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#include <neo_gta02.h>
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/* some parameters for the board */
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/*
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*
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@ -62,7 +55,7 @@
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#define B0_Tcos 0x0 /* 0clk */
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#define B0_Tacc 0x7 /* 14clk */
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#define B0_Tcoh 0x0 /* 0clk */
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#define B0_Tah 0x0 /* 0clk */
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#define B0_Tah 0x0 /* 0clk */
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#define B0_Tacp 0x0
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#define B0_PMC 0x0 /* normal */
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@ -71,7 +64,7 @@
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#define B1_Tcos 0x3 /* 4clk */
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#define B1_Tacc 0x3 /* 4clk */
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#define B1_Tcoh 0x3 /* 4clk */
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#define B1_Tah 0x0 /* 0clk */
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#define B1_Tah 0x0 /* 0clk */
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#define B1_Tacp 0x0
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#define B1_PMC 0x0
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@ -79,7 +72,7 @@
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#define B2_Tcos 0x0
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#define B2_Tacc 0x7
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#define B2_Tcoh 0x0
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#define B2_Tah 0x0
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#define B2_Tah 0x0
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#define B2_Tacp 0x0
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#define B2_PMC 0x0
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@ -87,15 +80,15 @@
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#define B3_Tcos 0x3 /* 4clk */
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#define B3_Tacc 0x7 /* 14clk */
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#define B3_Tcoh 0x1 /* 1clk */
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#define B3_Tah 0x0 /* 0clk */
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#define B3_Tacp 0x3 /* 6clk */
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#define B3_Tah 0x0 /* 0clk */
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#define B3_Tacp 0x3 /* 6clk */
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#define B3_PMC 0x0 /* normal */
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#define B4_Tacs 0x0 /* 0clk */
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#define B4_Tcos 0x0 /* 0clk */
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#define B4_Tacc 0x7 /* 14clk */
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#define B4_Tcoh 0x0 /* 0clk */
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#define B4_Tah 0x0 /* 0clk */
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#define B4_Tah 0x0 /* 0clk */
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#define B4_Tacp 0x0
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#define B4_PMC 0x0 /* normal */
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@ -103,26 +96,26 @@
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#define B5_Tcos 0x0 /* 0clk */
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#define B5_Tacc 0x7 /* 14clk */
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#define B5_Tcoh 0x0 /* 0clk */
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#define B5_Tah 0x0 /* 0clk */
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#define B5_Tah 0x0 /* 0clk */
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#define B5_Tacp 0x0
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#define B5_PMC 0x0 /* normal */
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#define B6_MT 0x3 /* SDRAM */
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#define B6_MT 0x3 /* SDRAM */
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#define B6_Trcd 0x1 /* 3clk */
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#define B6_SCAN 0x1 /* 9bit */
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#define B7_SCAN 0x1 /* 9bit */
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#define B7_MT 0x3 /* SDRAM */
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#define B7_MT 0x3 /* SDRAM */
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#define B7_Trcd 0x1 /* 3clk */
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|
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/* REFRESH parameter */
|
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#define REFEN 0x1 /* Refresh enable */
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#define REFEN 0x1 /* Refresh enable */
|
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#define TREFMD 0x0 /* CBR(CAS before RAS)/Auto refresh */
|
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#define Trp 0x1 /* 3clk */
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#define Trc 0x3 /* 7clk */
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#define Tchr 0x2 /* 3clk */
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#define Trp 0x1 /* 3clk */
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#define Trc 0x3 /* 7clk */
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#define Tchr 0x2 /* 3clk */
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//#define REFCNT 1113 /* period=15.6us, HCLK=60Mhz, (2048+1-15.6*60) */
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#define REFCNT 997 /* period=17.5us, HCLK=60Mhz, (2048+1-15.6*60) */
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/**************************************/
|
||||
@ -149,30 +142,6 @@ lowlevel_init:
|
||||
orr r1, r1, #0xc0000000
|
||||
mcr p15, 0, r1, c1, c0, 0
|
||||
|
||||
#if defined(CONFIG_ARCH_GTA01_v4) || defined(CONFIG_ARCH_GTA01B_v2) || defined(CONFIG_ARCH_GTA01B_v3)
|
||||
/* switch on power for NAND */
|
||||
ldr r0, =0x56000010 /* GPBCON */
|
||||
ldr r1, [r0]
|
||||
orr r1, r1, #0x10
|
||||
str r1, [r0]
|
||||
|
||||
ldr r0, =0x56000014 /* GPBDAT */
|
||||
ldr r1, [r0]
|
||||
orr r1, r1, #(1 <<2)
|
||||
str r1, [r0]
|
||||
#endif
|
||||
|
||||
#if defined(CONFIG_ARCH_GTA02_v1)
|
||||
/* enable KEEPACT(GPJ3) to make sure PMU keeps us alive */
|
||||
ldr r0, =0x56000000 /* GPJ base */
|
||||
ldr r1, [r0, #0xd0] /* GPJCON */
|
||||
orr r1, r1, #(1 << 6)
|
||||
str r1, [r0, #0xd0]
|
||||
|
||||
ldr r1, [r0, #0xd4] /* GPJDAT */
|
||||
orr r1, r1, #(1 << 3)
|
||||
str r1, [r0, #0xd4]
|
||||
#elif CONFIG_GTA02_REVISION >= 2
|
||||
/* enable KEEPACT(GPJ8) to make sure PMU keeps us alive */
|
||||
ldr r0, =0x56000000 /* GPJ base */
|
||||
ldr r1, [r0, #0xd0] /* GPJCON */
|
||||
@ -182,7 +151,6 @@ lowlevel_init:
|
||||
ldr r1, [r0, #0xd4] /* GPJDAT */
|
||||
orr r1, r1, #(1 << 8)
|
||||
str r1, [r0, #0xd4]
|
||||
#endif
|
||||
/* everything is fine now */
|
||||
mov pc, lr
|
||||
|
||||
@ -200,10 +168,6 @@ SMRDATA:
|
||||
.word ((B6_MT<<15)+(B6_Trcd<<2)+(B6_SCAN))
|
||||
.word ((B7_MT<<15)+(B7_Trcd<<2)+(B7_SCAN))
|
||||
.word ((REFEN<<23)+(TREFMD<<22)+(Trp<<20)+(Trc<<18)+(Tchr<<16)+REFCNT)
|
||||
#if CONFIG_GTA02_REVISION >= 2
|
||||
.word 0xb1
|
||||
#else
|
||||
.word 0xb2
|
||||
#endif
|
||||
.word 0x30
|
||||
.word 0x30
|
||||
|
||||
417
qiboot/src/start.S
Normal file
417
qiboot/src/start.S
Normal file
@ -0,0 +1,417 @@
|
||||
/*
|
||||
* (C) Copyright 2007 OpenMoko, Inc.
|
||||
*
|
||||
* Configuation settings for the FIC Neo GTA02 Linux GSM phone
|
||||
*
|
||||
* 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 <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
|
||||
/*
|
||||
*************************************************************************
|
||||
*
|
||||
* Startup Code (called from the ARM reset exception vector)
|
||||
*
|
||||
* do important init only if we don't start from memory!
|
||||
* relocate armboot to ram
|
||||
* setup stack
|
||||
*
|
||||
*************************************************************************
|
||||
*/
|
||||
|
||||
.globl preboot_override
|
||||
preboot_override:
|
||||
.word 0
|
||||
|
||||
/* Must follow preboot_override , so we get a well-known address ! */
|
||||
.globl env_override
|
||||
env_override:
|
||||
.word 0
|
||||
|
||||
/* we want to be able to start kboot directly from within NAND flash */
|
||||
.globl booted_from_nand
|
||||
booted_from_nand:
|
||||
.word 0
|
||||
_booted_from_nand:
|
||||
.word booted_from_nand
|
||||
|
||||
|
||||
_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
|
||||
|
||||
/* 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
|
||||
|
||||
|
||||
start_code:
|
||||
/*
|
||||
* set the cpu to SVC32 mode
|
||||
*/
|
||||
mrs r0,cpsr
|
||||
bic r0,r0,#0x1f
|
||||
orr r0,r0,#0xd3
|
||||
msr cpsr,r0
|
||||
|
||||
/* turn off the watchdog */
|
||||
# define pWTCON 0x53000000
|
||||
ldr r0, =pWTCON
|
||||
mov r1, #0x0
|
||||
str r1, [r0]
|
||||
/*
|
||||
* mask all IRQs by setting all bits in the INTMR - default
|
||||
*/
|
||||
# define INTMSK 0x4A000008 /* Interupt-Controller base addresses */
|
||||
# define INTSUBMSK 0x4A00001C
|
||||
# define INTSUBMSK_val 0xffff
|
||||
mov r1, #0xffffffff
|
||||
ldr r0, =INTMSK
|
||||
str r1, [r0]
|
||||
|
||||
ldr r1, =INTSUBMSK_val
|
||||
ldr r0, =INTSUBMSK
|
||||
str r1, [r0]
|
||||
|
||||
/* Make sure we get FCLK:HCLK:PCLK = 1:3:6 */
|
||||
# define CAMDIVN 0x4C000018
|
||||
ldr r0, =CAMDIVN
|
||||
mov r1, #0
|
||||
str r1, [r0]
|
||||
|
||||
/* Clock asynchronous mode */
|
||||
mrc p15, 0, r1, c1, c0, 0
|
||||
orr r1, r1, #0xc0000000
|
||||
mcr p15, 0, r1, c1, c0, 0
|
||||
|
||||
# define LOCKTIME 0x4c000000
|
||||
# define UPLLCON 0x4c000008
|
||||
# define UPLLCON_val (( 88 << 12) + (8 << 4) + 2)
|
||||
# define MPLLCON 0x4c000004
|
||||
# define MPLLCON_val ((142 << 12) + (7 << 4) + 1)
|
||||
|
||||
ldr r0, =LOCKTIME
|
||||
mov r1, #0xffffff
|
||||
str r1, [r0]
|
||||
|
||||
ldr r0, =UPLLCON
|
||||
ldr r1, =UPLLCON_val
|
||||
str r1, [r0]
|
||||
|
||||
/* Page 7-23 in s3c2442B manual, seven nops between UPLL and MPLL */
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
|
||||
ldr r0, =MPLLCON
|
||||
ldr r1, =MPLLCON_val
|
||||
str r1, [r0] /* MPLLCON */
|
||||
|
||||
# define CLKDIVN 0x4C000014 /* clock divisor register */
|
||||
# define CLKDIVN_val 7 /* FCLK:HCLK:PCLK = 1:3:6 */
|
||||
ldr r0, =CLKDIVN
|
||||
mov r1, #CLKDIVN_val
|
||||
str r1, [r0]
|
||||
|
||||
/* enable uart */
|
||||
ldr r0, =0x4c00000c /* clkcon */
|
||||
ldr r1, =0x7fff0 /* all clocks on */
|
||||
str r1, [r0]
|
||||
|
||||
/* gpio UART0 init */
|
||||
ldr r0, =0x56000070
|
||||
mov r1, #0xaa
|
||||
str r1, [r0]
|
||||
|
||||
/* init uart */
|
||||
ldr r0, =0x50000000
|
||||
mov r1, #0x03
|
||||
str r1, [r0]
|
||||
ldr r1, =0x245
|
||||
str r1, [r0, #0x04]
|
||||
mov r1, #0x01
|
||||
str r1, [r0, #0x08]
|
||||
mov r1, #0x00
|
||||
str r1, [r0, #0x0c]
|
||||
mov r1, #0x1a
|
||||
str r1, [r0, #0x28]
|
||||
|
||||
bl cpu_init_crit
|
||||
/*
|
||||
* Size of malloc() pool
|
||||
*/
|
||||
#define CFG_ENV_SIZE 0x40000 /* 128k Total Size of Environment Sector */
|
||||
#define CFG_MALLOC_LEN (CFG_ENV_SIZE + 400*1024)
|
||||
/* >> CFG_VIDEO_LOGO_MAX_SIZE */
|
||||
#define CFG_GBL_DATA_SIZE 128 /* size in bytes reserved for initial data */
|
||||
#define CONFIG_STACKSIZE (128*1024) /* regular stack */
|
||||
#define CONFIG_STACKSIZE_IRQ (8*1024) /* IRQ stack */
|
||||
#define CONFIG_STACKSIZE_FIQ (4*1024) /* FIQ 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 r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
|
||||
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 pc, _start_armboot
|
||||
|
||||
_start_armboot:
|
||||
.word blink_led
|
||||
|
||||
/*
|
||||
*************************************************************************
|
||||
*
|
||||
* 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
|
||||
|
||||
/*
|
||||
*************************************************************************
|
||||
*
|
||||
* 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
|
||||
sub sp, sp, #S_FRAME_SIZE
|
||||
stmia sp, {r0 - r12} @ Calling 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
|
||||
ldmia r2, {r2 - r3} @ get pc, cpsr
|
||||
add r0, sp, #S_FRAME_SIZE @ restore sp_SVC
|
||||
|
||||
add r5, sp, #S_SP
|
||||
mov r1, lr
|
||||
stmia r5, {r0 - r3} @ save sp_SVC, lr_SVC, pc, cpsr
|
||||
mov r0, sp
|
||||
.endm
|
||||
|
||||
.macro irq_save_user_regs
|
||||
sub sp, sp, #S_FRAME_SIZE
|
||||
stmia sp, {r0 - r12} @ Calling r0-r12
|
||||
add r7, sp, #S_PC
|
||||
stmdb r7, {sp, lr}^ @ Calling SP, LR
|
||||
str lr, [r7, #0] @ Save calling PC
|
||||
mrs r6, spsr
|
||||
str r6, [r7, #4] @ Save CPSR
|
||||
str r0, [r7, #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 / spsr
|
||||
mrs lr, spsr
|
||||
str lr, [r13, #4]
|
||||
|
||||
mov r13, #MODE_SVC @ prepare SVC-Mode
|
||||
@ msr spsr_c, r13
|
||||
msr spsr, r13
|
||||
mov lr, pc
|
||||
movs pc, lr
|
||||
.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
|
||||
|
||||
/* 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
|
||||
Loading…
Reference in New Issue
Block a user