mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-04 10:30:32 +00:00
92 lines
2.2 KiB
C
92 lines
2.2 KiB
C
/*
|
|
* (C) Copyright 2004 Texas Insturments
|
|
*
|
|
* (C) Copyright 2002
|
|
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
|
|
* Marius Groeger <mgroeger@sysgo.de>
|
|
*
|
|
* (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
|
|
*/
|
|
|
|
/*
|
|
* CPU specific code
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <asm/system.h>
|
|
|
|
#ifdef CONFIG_USE_IRQ
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
#endif
|
|
|
|
static void cache_flush(void);
|
|
|
|
int cpu_init (void)
|
|
{
|
|
/*
|
|
* setup up stacks if necessary
|
|
*/
|
|
#ifdef CONFIG_USE_IRQ
|
|
IRQ_STACK_START = _armboot_start - CONFIG_SYS_MALLOC_LEN - CONFIG_SYS_GBL_DATA_SIZE - 4;
|
|
FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ;
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
int cleanup_before_linux (void)
|
|
{
|
|
/*
|
|
* this function is called just before we call linux
|
|
* it prepares the processor for linux
|
|
*
|
|
* we turn off caches etc ...
|
|
*/
|
|
|
|
disable_interrupts ();
|
|
|
|
#ifdef CONFIG_LCD
|
|
{
|
|
extern void lcd_disable(void);
|
|
extern void lcd_panel_disable(void);
|
|
|
|
lcd_disable(); /* proper disable of lcd & panel */
|
|
lcd_panel_disable();
|
|
}
|
|
#endif
|
|
|
|
/* turn off I/D-cache */
|
|
icache_disable();
|
|
dcache_disable();
|
|
/* flush I/D-cache */
|
|
cache_flush();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void cache_flush(void)
|
|
{
|
|
unsigned long i = 0;
|
|
|
|
asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (i)); /* invalidate both caches and flush btb */
|
|
asm ("mcr p15, 0, %0, c7, c10, 4": :"r" (i)); /* mem barrier to sync things */
|
|
}
|