mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-31 16:38:12 +00:00
147 lines
3.4 KiB
C
147 lines
3.4 KiB
C
/*
|
|
* Copyright (C) 2004, 2005 by Thomas Koeller (thomas.koeller@baslerweb.com)
|
|
* Based on the PMC-Sierra Yosemite board support by Ralf Baechle and
|
|
* Manish Lachwani.
|
|
*
|
|
* 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 <linux/init.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/module.h>
|
|
#include <asm/io.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/reboot.h>
|
|
#include <asm/system.h>
|
|
#include <asm/bootinfo.h>
|
|
#include <asm/string.h>
|
|
|
|
#include <excite.h>
|
|
|
|
/* This struct is used by Redboot to pass arguments to the kernel */
|
|
typedef struct
|
|
{
|
|
char *name;
|
|
char *val;
|
|
} t_env_var;
|
|
|
|
struct parmblock {
|
|
t_env_var memsize;
|
|
t_env_var modetty0;
|
|
t_env_var ethaddr;
|
|
t_env_var env_end;
|
|
char *argv[2];
|
|
char text[0];
|
|
};
|
|
|
|
static unsigned int prom_argc;
|
|
static const char ** prom_argv;
|
|
static const t_env_var * prom_env;
|
|
|
|
static void prom_halt(void) __attribute__((noreturn));
|
|
static void prom_exit(void) __attribute__((noreturn));
|
|
|
|
|
|
|
|
const char *get_system_type(void)
|
|
{
|
|
return "Basler eXcite";
|
|
}
|
|
|
|
/*
|
|
* Halt the system
|
|
*/
|
|
static void prom_halt(void)
|
|
{
|
|
printk(KERN_NOTICE "\n** System halted.\n");
|
|
while (1)
|
|
asm volatile (
|
|
"\t.set\tmips3\n"
|
|
"\twait\n"
|
|
"\t.set\tmips0\n"
|
|
);
|
|
}
|
|
|
|
/*
|
|
* Reset the CPU and re-enter Redboot
|
|
*/
|
|
static void prom_exit(void)
|
|
{
|
|
unsigned int i;
|
|
volatile unsigned char * const flg =
|
|
(volatile unsigned char *) (EXCITE_ADDR_FPGA + EXCITE_FPGA_DPR);
|
|
|
|
/* Clear the watchdog reset flag, set the reboot flag */
|
|
*flg &= ~0x01;
|
|
*flg |= 0x80;
|
|
|
|
for (i = 0; i < 10; i++) {
|
|
*(volatile unsigned char *) (EXCITE_ADDR_FPGA + EXCITE_FPGA_SYSCTL) = 0x02;
|
|
iob();
|
|
mdelay(1000);
|
|
}
|
|
|
|
printk(KERN_NOTICE "Reset failed\n");
|
|
prom_halt();
|
|
}
|
|
|
|
static const char __init *prom_getenv(char *name)
|
|
{
|
|
const t_env_var * p;
|
|
for (p = prom_env; p->name != NULL; p++)
|
|
if(strcmp(name, p->name) == 0)
|
|
break;
|
|
return p->val;
|
|
}
|
|
|
|
/*
|
|
* Init routine which accepts the variables from Redboot
|
|
*/
|
|
void __init prom_init(void)
|
|
{
|
|
const struct parmblock * const pb = (struct parmblock *) fw_arg2;
|
|
|
|
prom_argc = fw_arg0;
|
|
prom_argv = (const char **) fw_arg1;
|
|
prom_env = &pb->memsize;
|
|
|
|
/* Callbacks for halt, restart */
|
|
_machine_restart = (void (*)(char *)) prom_exit;
|
|
_machine_halt = prom_halt;
|
|
|
|
#ifdef CONFIG_32BIT
|
|
/* copy command line */
|
|
strcpy(arcs_cmdline, prom_argv[1]);
|
|
memsize = simple_strtol(prom_getenv("memsize"), NULL, 16);
|
|
strcpy(modetty, prom_getenv("modetty0"));
|
|
#endif /* CONFIG_32BIT */
|
|
|
|
#ifdef CONFIG_64BIT
|
|
# error 64 bit support not implemented
|
|
#endif /* CONFIG_64BIT */
|
|
|
|
mips_machgroup = MACH_GROUP_TITAN;
|
|
mips_machtype = MACH_TITAN_EXCITE;
|
|
}
|
|
|
|
/* This is called from free_initmem(), so we need to provide it */
|
|
void __init prom_free_prom_memory(void)
|
|
{
|
|
/* Nothing to do */
|
|
}
|