6f4a8856e0
Quite a few of the non-mmu specific support files have a pathname in the title comments of the file. These files have moved around a bit over the years, and most are no longer accurate. Remove the pathname and fix the comments to include at least a short description of the files contents. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
138 lines
4.2 KiB
C
138 lines
4.2 KiB
C
/*
|
|
* ints.c - first level interrupt handlers
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file COPYING in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (c) 2000 Michael Leslie <mleslie@lineo.com>
|
|
* Copyright (c) 1996 Roman Zippel
|
|
* Copyright (c) 1999 D. Jeff Dionne <jeff@uclinux.org>
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/irq.h>
|
|
#include <asm/traps.h>
|
|
#include <asm/machdep.h>
|
|
#include <asm/m68360.h>
|
|
|
|
/* from quicc/commproc.c: */
|
|
extern QUICC *pquicc;
|
|
extern void cpm_interrupt_init(void);
|
|
|
|
#define INTERNAL_IRQS (96)
|
|
|
|
/* assembler routines */
|
|
asmlinkage void system_call(void);
|
|
asmlinkage void buserr(void);
|
|
asmlinkage void trap(void);
|
|
asmlinkage void bad_interrupt(void);
|
|
asmlinkage void inthandler(void);
|
|
|
|
static void intc_irq_unmask(struct irq_data *d)
|
|
{
|
|
pquicc->intr_cimr |= (1 << d->irq);
|
|
}
|
|
|
|
static void intc_irq_mask(struct irq_data *d)
|
|
{
|
|
pquicc->intr_cimr &= ~(1 << d->irq);
|
|
}
|
|
|
|
static void intc_irq_ack(struct irq_data *d)
|
|
{
|
|
pquicc->intr_cisr = (1 << d->irq);
|
|
}
|
|
|
|
static struct irq_chip intc_irq_chip = {
|
|
.name = "M68K-INTC",
|
|
.irq_mask = intc_irq_mask,
|
|
.irq_unmask = intc_irq_unmask,
|
|
.irq_ack = intc_irq_ack,
|
|
};
|
|
|
|
/*
|
|
* This function should be called during kernel startup to initialize
|
|
* the vector table.
|
|
*/
|
|
void __init trap_init(void)
|
|
{
|
|
int vba = (CPM_VECTOR_BASE<<4);
|
|
|
|
/* set up the vectors */
|
|
_ramvec[2] = buserr;
|
|
_ramvec[3] = trap;
|
|
_ramvec[4] = trap;
|
|
_ramvec[5] = trap;
|
|
_ramvec[6] = trap;
|
|
_ramvec[7] = trap;
|
|
_ramvec[8] = trap;
|
|
_ramvec[9] = trap;
|
|
_ramvec[10] = trap;
|
|
_ramvec[11] = trap;
|
|
_ramvec[12] = trap;
|
|
_ramvec[13] = trap;
|
|
_ramvec[14] = trap;
|
|
_ramvec[15] = trap;
|
|
|
|
_ramvec[32] = system_call;
|
|
_ramvec[33] = trap;
|
|
|
|
cpm_interrupt_init();
|
|
|
|
/* set up CICR for vector base address and irq level */
|
|
/* irl = 4, hp = 1f - see MC68360UM p 7-377 */
|
|
pquicc->intr_cicr = 0x00e49f00 | vba;
|
|
|
|
/* CPM interrupt vectors: (p 7-376) */
|
|
_ramvec[vba+CPMVEC_ERROR] = bad_interrupt; /* Error */
|
|
_ramvec[vba+CPMVEC_PIO_PC11] = inthandler; /* pio - pc11 */
|
|
_ramvec[vba+CPMVEC_PIO_PC10] = inthandler; /* pio - pc10 */
|
|
_ramvec[vba+CPMVEC_SMC2] = inthandler; /* smc2/pip */
|
|
_ramvec[vba+CPMVEC_SMC1] = inthandler; /* smc1 */
|
|
_ramvec[vba+CPMVEC_SPI] = inthandler; /* spi */
|
|
_ramvec[vba+CPMVEC_PIO_PC9] = inthandler; /* pio - pc9 */
|
|
_ramvec[vba+CPMVEC_TIMER4] = inthandler; /* timer 4 */
|
|
_ramvec[vba+CPMVEC_RESERVED1] = inthandler; /* reserved */
|
|
_ramvec[vba+CPMVEC_PIO_PC8] = inthandler; /* pio - pc8 */
|
|
_ramvec[vba+CPMVEC_PIO_PC7] = inthandler; /* pio - pc7 */
|
|
_ramvec[vba+CPMVEC_PIO_PC6] = inthandler; /* pio - pc6 */
|
|
_ramvec[vba+CPMVEC_TIMER3] = inthandler; /* timer 3 */
|
|
_ramvec[vba+CPMVEC_PIO_PC5] = inthandler; /* pio - pc5 */
|
|
_ramvec[vba+CPMVEC_PIO_PC4] = inthandler; /* pio - pc4 */
|
|
_ramvec[vba+CPMVEC_RESERVED2] = inthandler; /* reserved */
|
|
_ramvec[vba+CPMVEC_RISCTIMER] = inthandler; /* timer table */
|
|
_ramvec[vba+CPMVEC_TIMER2] = inthandler; /* timer 2 */
|
|
_ramvec[vba+CPMVEC_RESERVED3] = inthandler; /* reserved */
|
|
_ramvec[vba+CPMVEC_IDMA2] = inthandler; /* idma 2 */
|
|
_ramvec[vba+CPMVEC_IDMA1] = inthandler; /* idma 1 */
|
|
_ramvec[vba+CPMVEC_SDMA_CB_ERR] = inthandler; /* sdma channel bus error */
|
|
_ramvec[vba+CPMVEC_PIO_PC3] = inthandler; /* pio - pc3 */
|
|
_ramvec[vba+CPMVEC_PIO_PC2] = inthandler; /* pio - pc2 */
|
|
/* _ramvec[vba+CPMVEC_TIMER1] = cpm_isr_timer1; */ /* timer 1 */
|
|
_ramvec[vba+CPMVEC_TIMER1] = inthandler; /* timer 1 */
|
|
_ramvec[vba+CPMVEC_PIO_PC1] = inthandler; /* pio - pc1 */
|
|
_ramvec[vba+CPMVEC_SCC4] = inthandler; /* scc 4 */
|
|
_ramvec[vba+CPMVEC_SCC3] = inthandler; /* scc 3 */
|
|
_ramvec[vba+CPMVEC_SCC2] = inthandler; /* scc 2 */
|
|
_ramvec[vba+CPMVEC_SCC1] = inthandler; /* scc 1 */
|
|
_ramvec[vba+CPMVEC_PIO_PC0] = inthandler; /* pio - pc0 */
|
|
|
|
|
|
/* turn off all CPM interrupts */
|
|
pquicc->intr_cimr = 0x00000000;
|
|
}
|
|
|
|
void init_IRQ(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; (i < NR_IRQS); i++) {
|
|
irq_set_chip(i, &intc_irq_chip);
|
|
irq_set_handler(i, handle_level_irq);
|
|
}
|
|
}
|
|
|