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/*
* linux/arch/mips/philips/nino/setup.c
*
* Copyright (C) 2001 Steven J. Hill (sjhill@realitydiluted.com)
*
* 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.
*
* Interrupt and exception initialization for Philips Nino.
*/
#include <linux/console.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/mc146818rtc.h>
#include <linux/sched.h>
#include <asm/addrspace.h>
#include <asm/gdb-stub.h>
#include <asm/irq.h>
#include <asm/wbflush.h>
#include <asm/tx3912.h>
extern struct rtc_ops nino_rtc_ops;
extern void nino_wait(void);
extern void setup_nino_reset_vectors(void);
extern asmlinkage void nino_handle_int(void);
extern int setup_nino_irq(int, struct irqaction *);
void (*board_time_init) (struct irqaction * irq);
#ifdef CONFIG_REMOTE_DEBUG
extern void set_debug_traps(void);
extern void breakpoint(void);
static int remote_debug = 0;
#endif
static void __init nino_irq_setup(void)
{
unsigned int tmp;
/* Turn all interrupts off */
IntEnable1 = 0;
IntEnable2 = 0;
IntEnable3 = 0;
IntEnable4 = 0;
IntEnable5 = 0;
IntEnable6 = 0;
/* Clear all interrupts */
IntClear1 = 0xffffffff;
IntClear2 = 0xffffffff;
IntClear3 = 0xffffffff;
IntClear4 = 0xffffffff;
IntClear5 = 0xffffffff;
IntClear6 = 0xffffffff;
/*
* Enable only the interrupts for the UART and negative
* edge (1-to-0) triggered multi-function I/O pins.
*/
change_cp0_status(ST0_BEV, 0);
tmp = read_32bit_cp0_register(CP0_STATUS);
change_cp0_status(ST0_IM, tmp | IE_IRQ2 | IE_IRQ4);
/* Register the global interrupt handler */
set_except_vector(0, nino_handle_int);
#ifdef CONFIG_REMOTE_DEBUG
if (remote_debug) {
set_debug_traps();
breakpoint();
}
#endif
}
static __init void nino_time_init(struct irqaction *irq)
{
unsigned int scratch = 0;
/*
* Enable periodic interrupts
*/
setup_nino_irq(0, irq);
RTCperiodTimer = PER_TIMER_COUNT;
RTCtimerControl = TIM_ENPERTIMER;
IntEnable5 |= INT5_PERIODICINT;
scratch = inl(TX3912_CLK_CTRL_BASE);
scratch |= TX3912_CLK_CTRL_ENTIMERCLK;
outl(scratch, TX3912_CLK_CTRL_BASE);
/* Enable all interrupts */
IntEnable6 |= INT6_GLOBALEN | INT6_PERIODICINT;
}
void __init nino_setup(void)
{
irq_setup = nino_irq_setup;
board_time_init = nino_time_init;
/* Base address to use for PC type I/O accesses */
mips_io_port_base = KSEG1ADDR(0xB0C00000);
setup_nino_reset_vectors();
/* Function called during process idle (cpu_idle) */
cpu_wait = nino_wait;
#ifdef CONFIG_FB
conswitchp = &dummy_con;
#endif
#ifdef CONFIG_REMOTE_DEBUG
remote_debug = 1;
#endif
rtc_ops = &nino_rtc_ops;
}
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