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/*
* linux/include/asm-arm/arch-ebsa285/system.h
*
* Copyright (C) 1996-1999 Russell King.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <asm/hardware/dec21285.h>
#include <asm/io.h>
#include <asm/hardware.h>
#include <asm/leds.h>
#include <asm/mach-types.h>
static void arch_idle(void)
{
unsigned long start_idle;
start_idle = jiffies;
do {
if (current->need_resched || hlt_counter)
goto slow_out;
cpu_do_idle(IDLE_WAIT_FAST);
} while (time_before(jiffies, start_idle + HZ/50));
cpu_do_idle(IDLE_CLOCK_SLOW);
while (!current->need_resched && !hlt_counter) {
cpu_do_idle(IDLE_WAIT_SLOW);
}
cpu_do_idle(IDLE_CLOCK_FAST);
slow_out:
}
static inline void arch_reset(char mode)
{
if (mode == 's') {
/*
* Jump into the ROM
*/
cpu_reset(0x41000000);
} else {
if (machine_is_netwinder()) {
/* open up the SuperIO chip
*/
outb(0x87, 0x370);
outb(0x87, 0x370);
/* aux function group 1 (logical device 7)
*/
outb(0x07, 0x370);
outb(0x07, 0x371);
/* set GP16 for WD-TIMER output
*/
outb(0xe6, 0x370);
outb(0x00, 0x371);
/* set a RED LED and toggle WD_TIMER for rebooting
*/
outb(0xc4, 0x338);
} else {
/*
* Force the watchdog to do a CPU reset.
*
* After making sure that the watchdog is disabled
* (so we can change the timer registers) we first
* enable the timer to autoreload itself. Next, the
* timer interval is set really short and any
* current interrupt request is cleared (so we can
* see an edge transition). Finally, TIMER4 is
* enabled as the watchdog.
*/
*CSR_SA110_CNTL &= ~(1 << 13);
*CSR_TIMER4_CNTL = TIMER_CNTL_ENABLE |
TIMER_CNTL_AUTORELOAD |
TIMER_CNTL_DIV16;
*CSR_TIMER4_LOAD = 0x2;
*CSR_TIMER4_CLR = 0;
*CSR_SA110_CNTL |= (1 << 13);
}
}
}
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