mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-29 16:10:58 +00:00
ba94a1bba3
- Add IXP4xx NPE ethernet MAC support - Add support for Intel IXDPG425 board - Add support for Prodrive PDNB3 board - Add IRQ support Patch by Stefan Roese, 23 May 2006 [This patch does not include cpu/ixp/npe/IxNpeMicrocode.c which still sufferes from licensing issues. Blame Intel.]
217 lines
4 KiB
C
217 lines
4 KiB
C
/*
|
|
* (C) Copyright 2002
|
|
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
|
|
* Marius Groeger <mgroeger@sysgo.de>
|
|
*
|
|
* (C) Copyright 2002
|
|
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
|
|
* Alex Zuepke <azu@sysgo.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/arch/ixp425.h>
|
|
|
|
ulong loops_per_jiffy;
|
|
|
|
#ifdef CONFIG_USE_IRQ
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
#endif
|
|
|
|
#if defined(CONFIG_DISPLAY_CPUINFO)
|
|
int print_cpuinfo (void)
|
|
{
|
|
unsigned long id;
|
|
int speed = 0;
|
|
|
|
asm ("mrc p15, 0, %0, c0, c0, 0":"=r" (id));
|
|
|
|
puts("CPU: Intel IXP425 at ");
|
|
switch ((id & 0x000003f0) >> 4) {
|
|
case 0x1c:
|
|
loops_per_jiffy = 887467;
|
|
speed = 533;
|
|
break;
|
|
|
|
case 0x1d:
|
|
loops_per_jiffy = 666016;
|
|
speed = 400;
|
|
break;
|
|
|
|
case 0x1f:
|
|
loops_per_jiffy = 442901;
|
|
speed = 266;
|
|
break;
|
|
}
|
|
|
|
if (speed)
|
|
printf("%d MHz\n", speed);
|
|
else
|
|
puts("unknown revision\n");
|
|
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_DISPLAY_CPUINFO */
|
|
|
|
int cpu_init (void)
|
|
{
|
|
/*
|
|
* setup up stacks if necessary
|
|
*/
|
|
#ifdef CONFIG_USE_IRQ
|
|
IRQ_STACK_START = _armboot_start - CFG_MALLOC_LEN - CFG_GBL_DATA_SIZE - 4;
|
|
FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ;
|
|
#endif
|
|
|
|
#if (CONFIG_COMMANDS & CFG_CMD_PCI) || defined (CONFIG_PCI)
|
|
pci_init();
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
int cleanup_before_linux (void)
|
|
{
|
|
/*
|
|
* this function is called just before we call linux
|
|
* it prepares the processor for linux
|
|
*
|
|
* just disable everything that can disturb booting linux
|
|
*/
|
|
|
|
unsigned long i;
|
|
|
|
disable_interrupts ();
|
|
|
|
/* turn off I-cache */
|
|
asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
|
|
i &= ~0x1000;
|
|
asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
|
|
|
|
/* flush I-cache */
|
|
asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i));
|
|
|
|
return (0);
|
|
}
|
|
|
|
int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
|
|
{
|
|
printf ("resetting ...\n");
|
|
|
|
udelay (50000); /* wait 50 ms */
|
|
disable_interrupts ();
|
|
reset_cpu (0);
|
|
|
|
/*NOTREACHED*/
|
|
return (0);
|
|
}
|
|
|
|
/* taken from blob */
|
|
void icache_enable (void)
|
|
{
|
|
register u32 i;
|
|
|
|
/* read control register */
|
|
asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
|
|
|
|
/* set i-cache */
|
|
i |= 0x1000;
|
|
|
|
/* write back to control register */
|
|
asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
|
|
}
|
|
|
|
void icache_disable (void)
|
|
{
|
|
register u32 i;
|
|
|
|
/* read control register */
|
|
asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
|
|
|
|
/* clear i-cache */
|
|
i &= ~0x1000;
|
|
|
|
/* write back to control register */
|
|
asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
|
|
|
|
/* flush i-cache */
|
|
asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i));
|
|
}
|
|
|
|
int icache_status (void)
|
|
{
|
|
register u32 i;
|
|
|
|
/* read control register */
|
|
asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
|
|
|
|
/* return bit */
|
|
return (i & 0x1000);
|
|
}
|
|
|
|
/* we will never enable dcache, because we have to setup MMU first */
|
|
void dcache_enable (void)
|
|
{
|
|
return;
|
|
}
|
|
|
|
void dcache_disable (void)
|
|
{
|
|
return;
|
|
}
|
|
|
|
int dcache_status (void)
|
|
{
|
|
return 0; /* always off */
|
|
}
|
|
|
|
/* FIXME */
|
|
/*
|
|
void pci_init(void)
|
|
{
|
|
return;
|
|
}
|
|
*/
|
|
|
|
#ifdef CONFIG_BOOTCOUNT_LIMIT
|
|
|
|
void bootcount_store (ulong a)
|
|
{
|
|
volatile ulong *save_addr = (volatile ulong *)(CFG_BOOTCOUNT_ADDR);
|
|
|
|
save_addr[0] = a;
|
|
save_addr[1] = BOOTCOUNT_MAGIC;
|
|
}
|
|
|
|
ulong bootcount_load (void)
|
|
{
|
|
volatile ulong *save_addr = (volatile ulong *)(CFG_BOOTCOUNT_ADDR);
|
|
|
|
if (save_addr[1] != BOOTCOUNT_MAGIC)
|
|
return 0;
|
|
else
|
|
return save_addr[0];
|
|
}
|
|
|
|
#endif /* CONFIG_BOOTCOUNT_LIMIT */
|