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Diffstat (limited to 'arch/nios/cpu/interrupts.c')
| -rw-r--r-- | arch/nios/cpu/interrupts.c | 196 |
1 files changed, 0 insertions, 196 deletions
diff --git a/arch/nios/cpu/interrupts.c b/arch/nios/cpu/interrupts.c deleted file mode 100644 index 55a5718..0000000 --- a/arch/nios/cpu/interrupts.c +++ /dev/null @@ -1,196 +0,0 @@ -/* - * (C) Copyright 2000-2002 - * Wolfgang Denk, DENX Software Engineering, wd@denx.de. - * - * (C) Copyright 2003, Psyent Corporation <www.psyent.com> - * Scott McNutt <smcnutt@psyent.com> - * - * 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 - */ - - -#include <nios.h> -#include <nios-io.h> -#include <asm/ptrace.h> -#include <common.h> -#include <command.h> -#include <watchdog.h> -#ifdef CONFIG_STATUS_LED -#include <status_led.h> -#endif - -/****************************************************************************/ - -struct irq_action { - interrupt_handler_t *handler; - void *arg; - int count; -}; - -static struct irq_action irq_vecs[64]; - -/*************************************************************************/ -volatile ulong timestamp = 0; - -void reset_timer (void) -{ - timestamp = 0; -} - -ulong get_timer (ulong base) -{ - WATCHDOG_RESET (); - return (timestamp - base); -} - -void set_timer (ulong t) -{ - timestamp = t; -} - - -/* The board must handle this interrupt if a timer is not - * provided. - */ -#if defined(CONFIG_SYS_NIOS_TMRBASE) -void timer_interrupt (struct pt_regs *regs) -{ - /* Interrupt is cleared by writing anything to the - * status register. - */ - nios_timer_t *tmr = (nios_timer_t *)CONFIG_SYS_NIOS_TMRBASE; - tmr->status = 0; - timestamp += CONFIG_SYS_NIOS_TMRMS; -#ifdef CONFIG_STATUS_LED - status_led_tick(timestamp); -#endif -} -#endif - -/*************************************************************************/ -int disable_interrupts (void) -{ - int val = 0; - - /* Writing anything to CLR_IE disables interrupts */ - val = rdctl (CTL_STATUS); - wrctl (CTL_CLR_IE, 0); - return (val & STATUS_IE); -} - -void enable_interrupts( void ) -{ - /* Writing anything SET_IE enables interrupts */ - wrctl (CTL_SET_IE, 0); -} - -void external_interrupt (struct pt_regs *regs) -{ - unsigned vec; - - vec = (regs->status & STATUS_IPRI) >> 9; /* ipri */ - - irq_vecs[vec].count++; - if (irq_vecs[vec].handler != NULL) { - (*irq_vecs[vec].handler)(irq_vecs[vec].arg); - } else { - /* A sad side-effect of masking a bogus interrupt is - * that lower priority interrupts will also be disabled. - * This is probably not what we want ... so hang insted. - */ - printf ("Unhandled interrupt: 0x%x\n", vec); - disable_interrupts (); - hang (); - } -} - -/*************************************************************************/ -int interrupt_init (void) -{ - int vec; - -#if defined(CONFIG_SYS_NIOS_TMRBASE) - nios_timer_t *tmr = (nios_timer_t *)CONFIG_SYS_NIOS_TMRBASE; - - tmr->control &= ~NIOS_TIMER_ITO; - tmr->control |= NIOS_TIMER_STOP; -#if defined(CONFIG_SYS_NIOS_TMRCNT) - tmr->periodl = CONFIG_SYS_NIOS_TMRCNT & 0xffff; - tmr->periodh = (CONFIG_SYS_NIOS_TMRCNT >> 16) & 0xffff; -#endif -#endif - - for (vec=0; vec<64; vec++ ) { - irq_vecs[vec].handler = NULL; - irq_vecs[vec].arg = NULL; - irq_vecs[vec].count = 0; - } - - /* Need timus interruptus -- start the lopri timer */ -#if defined(CONFIG_SYS_NIOS_TMRBASE) - tmr->control |= ( NIOS_TIMER_ITO | - NIOS_TIMER_CONT | - NIOS_TIMER_START ); - ipri (CONFIG_SYS_NIOS_TMRIRQ + 1); -#endif - enable_interrupts (); - return (0); -} - -void irq_install_handler (int vec, interrupt_handler_t *handler, void *arg) -{ - struct irq_action *irqa = irq_vecs; - int i = vec; - int flag; - - if (irqa[i].handler != NULL) { - printf ("Interrupt vector %d: handler 0x%x " - "replacing 0x%x\n", - vec, (uint)handler, (uint)irqa[i].handler); - } - - flag = disable_interrupts (); - irqa[i].handler = handler; - irqa[i].arg = arg; - if (flag ) - enable_interrupts (); -} - -/*************************************************************************/ -#if defined(CONFIG_CMD_IRQ) -int do_irqinfo (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) -{ - int vec; - - printf ("\nInterrupt-Information:\n"); - printf ("Nr Routine Arg Count\n"); - - for (vec=0; vec<64; vec++) { - if (irq_vecs[vec].handler != NULL) { - printf ("%02d %08lx %08lx %d\n", - vec, - (ulong)irq_vecs[vec].handler<<1, - (ulong)irq_vecs[vec].arg, - irq_vecs[vec].count); - } - } - - return (0); -} -#endif |