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68e99e54e9
Microblaze implement enable/disable interrupts through MSR that's why disable_interrupts function should return 1 when interrupt was enabled. Return 0 when interrupt was disabled. Signed-off-by: John Linn <john.linn@xilinx.com> Signed-off-by: Michal Simek <monstr@monstr.eu> Acked-by: Wolfgang Denk <wd@denx.de>
204 lines
4.8 KiB
C
204 lines
4.8 KiB
C
/*
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* (C) Copyright 2007 Michal Simek
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* (C) Copyright 2004 Atmark Techno, Inc.
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*
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* Michal SIMEK <monstr@monstr.eu>
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* Yasushi SHOJI <yashi@atmark-techno.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <command.h>
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#include <asm/microblaze_intc.h>
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#include <asm/asm.h>
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#undef DEBUG_INT
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extern void microblaze_disable_interrupts (void);
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extern void microblaze_enable_interrupts (void);
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void enable_interrupts (void)
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{
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MSRSET(0x2);
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}
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int disable_interrupts (void)
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{
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unsigned int msr;
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MFS(msr, rmsr);
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MSRCLR(0x2);
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return (msr & 0x2) != 0;
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}
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#ifdef CONFIG_SYS_INTC_0
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static struct irq_action vecs[CONFIG_SYS_INTC_0_NUM];
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/* mapping structure to interrupt controller */
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microblaze_intc_t *intc = (microblaze_intc_t *) (CONFIG_SYS_INTC_0_ADDR);
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/* default handler */
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void def_hdlr (void)
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{
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puts ("def_hdlr\n");
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}
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void enable_one_interrupt (int irq)
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{
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int mask;
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int offset = 1;
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offset <<= irq;
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mask = intc->ier;
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intc->ier = (mask | offset);
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#ifdef DEBUG_INT
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printf ("Enable one interrupt irq %x - mask %x,ier %x\n", offset, mask,
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intc->ier);
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printf ("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
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intc->iar, intc->mer);
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#endif
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}
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void disable_one_interrupt (int irq)
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{
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int mask;
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int offset = 1;
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offset <<= irq;
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mask = intc->ier;
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intc->ier = (mask & ~offset);
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#ifdef DEBUG_INT
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printf ("Disable one interrupt irq %x - mask %x,ier %x\n", irq, mask,
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intc->ier);
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printf ("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
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intc->iar, intc->mer);
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#endif
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}
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/* adding new handler for interrupt */
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void install_interrupt_handler (int irq, interrupt_handler_t * hdlr, void *arg)
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{
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struct irq_action *act;
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/* irq out of range */
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if ((irq < 0) || (irq > CONFIG_SYS_INTC_0_NUM)) {
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puts ("IRQ out of range\n");
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return;
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}
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act = &vecs[irq];
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if (hdlr) { /* enable */
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act->handler = hdlr;
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act->arg = arg;
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act->count = 0;
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enable_one_interrupt (irq);
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} else { /* disable */
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act->handler = (interrupt_handler_t *) def_hdlr;
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act->arg = (void *)irq;
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disable_one_interrupt (irq);
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}
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}
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/* initialization interrupt controller - hardware */
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void intc_init (void)
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{
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intc->mer = 0;
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intc->ier = 0;
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intc->iar = 0xFFFFFFFF;
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/* XIntc_Start - hw_interrupt enable and all interrupt enable */
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intc->mer = 0x3;
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#ifdef DEBUG_INT
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printf ("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
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intc->iar, intc->mer);
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#endif
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}
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int interrupts_init (void)
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{
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int i;
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/* initialize irq list */
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for (i = 0; i < CONFIG_SYS_INTC_0_NUM; i++) {
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vecs[i].handler = (interrupt_handler_t *) def_hdlr;
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vecs[i].arg = (void *)i;
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vecs[i].count = 0;
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}
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/* initialize intc controller */
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intc_init ();
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enable_interrupts ();
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return 0;
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}
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void interrupt_handler (void)
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{
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int irqs = intc->ivr; /* find active interrupt */
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int mask = 1;
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#ifdef DEBUG_INT
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int value;
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printf ("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
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intc->iar, intc->mer);
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R14(value);
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printf ("Interrupt handler on %x line, r14 %x\n", irqs, value);
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#endif
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struct irq_action *act = vecs + irqs;
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intc->iar = mask << irqs;
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#ifdef DEBUG_INT
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printf
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("Jumping to interrupt handler rutine addr %x,count %x,arg %x\n",
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act->handler, act->count, act->arg);
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#endif
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act->handler (act->arg);
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act->count++;
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#ifdef DEBUG_INT
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printf ("Dump INTC reg, isr %x, ier %x, iar %x, mer %x\n", intc->isr,
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intc->ier, intc->iar, intc->mer);
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R14(value);
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printf ("Interrupt handler on %x line, r14 %x\n", irqs, value);
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#endif
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}
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#endif
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#if defined(CONFIG_CMD_IRQ)
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#ifdef CONFIG_SYS_INTC_0
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int do_irqinfo (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
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{
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int i;
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struct irq_action *act = vecs;
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puts ("\nInterrupt-Information:\n\n"
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"Nr Routine Arg Count\n"
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"-----------------------------\n");
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for (i = 0; i < CONFIG_SYS_INTC_0_NUM; i++) {
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if (act->handler != (interrupt_handler_t*) def_hdlr) {
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printf ("%02d %08x %08x %d\n", i,
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(int)act->handler, (int)act->arg, act->count);
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}
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act++;
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}
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puts ("\n");
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return (0);
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}
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#else
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int do_irqinfo (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
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{
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puts ("Undefined interrupt controller\n");
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}
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#endif
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#endif
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