arch/m68knommu/platform/68360/ints.c

   1 /*
   2  * linux/arch/$(ARCH)/platform/$(PLATFORM)/ints.c
   3  *
   4  * This file is subject to the terms and conditions of the GNU General Public
   5  * License.  See the file COPYING in the main directory of this archive
   6  * for more details.
   7  *
   8  * Copyright (c) 2000  Michael Leslie <mleslie@lineo.com>
   9  * Copyright (c) 1996 Roman Zippel
  10  * Copyright (c) 1999 D. Jeff Dionne <jeff@uclinux.org>
  11  */
  12
  13 #include <linux/types.h>
  14 #include <linux/kernel.h>
  15 #include <linux/init.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/irq.h>
  18 #include <asm/traps.h>
  19 #include <asm/machdep.h>
  20 #include <asm/m68360.h>
  21
  22 /* from quicc/commproc.c: */
  23 extern QUICC *pquicc;
  24 extern void cpm_interrupt_init(void);
  25
  26 #define INTERNAL_IRQS (96)
  27
  28 /* assembler routines */
  29 asmlinkage void system_call(void);
  30 asmlinkage void buserr(void);
  31 asmlinkage void trap(void);
  32 asmlinkage void bad_interrupt(void);
  33 asmlinkage void inthandler(void);
  34
  35 extern void *_ramvec[];
  36
  37 /* The number of spurious interrupts */
  38 volatile unsigned int num_spurious;
  39
  40 /*
  41  * This function should be called during kernel startup to initialize
  42  * the vector table.
  43  */
  44 void init_vectors(void)
  45 {
  46         int i;
  47         int vba = (CPM_VECTOR_BASE<<4);
  48
  49         /* set up the vectors */
  50         _ramvec[2] = buserr;
  51         _ramvec[3] = trap;
  52         _ramvec[4] = trap;
  53         _ramvec[5] = trap;
  54         _ramvec[6] = trap;
  55         _ramvec[7] = trap;
  56         _ramvec[8] = trap;
  57         _ramvec[9] = trap;
  58         _ramvec[10] = trap;
  59         _ramvec[11] = trap;
  60         _ramvec[12] = trap;
  61         _ramvec[13] = trap;
  62         _ramvec[14] = trap;
  63         _ramvec[15] = trap;
  64
  65         _ramvec[32] = system_call;
  66         _ramvec[33] = trap;
  67
  68         cpm_interrupt_init();
  69
  70         /* set up CICR for vector base address and irq level */
  71         /* irl = 4, hp = 1f - see MC68360UM p 7-377 */
  72         pquicc->intr_cicr = 0x00e49f00 | vba;
  73
  74         /* CPM interrupt vectors: (p 7-376) */
  75         _ramvec[vba+CPMVEC_ERROR]       = bad_interrupt; /* Error */
  76         _ramvec[vba+CPMVEC_PIO_PC11]    = inthandler;   /* pio - pc11 */
  77         _ramvec[vba+CPMVEC_PIO_PC10]    = inthandler;   /* pio - pc10 */
  78         _ramvec[vba+CPMVEC_SMC2]        = inthandler;   /* smc2/pip */
  79         _ramvec[vba+CPMVEC_SMC1]        = inthandler;   /* smc1 */
  80         _ramvec[vba+CPMVEC_SPI]         = inthandler;   /* spi */
  81         _ramvec[vba+CPMVEC_PIO_PC9]     = inthandler;   /* pio - pc9 */
  82         _ramvec[vba+CPMVEC_TIMER4]      = inthandler;   /* timer 4 */
  83         _ramvec[vba+CPMVEC_RESERVED1]   = inthandler;   /* reserved */
  84         _ramvec[vba+CPMVEC_PIO_PC8]     = inthandler;   /* pio - pc8 */
  85         _ramvec[vba+CPMVEC_PIO_PC7]     = inthandler;  /* pio - pc7 */
  86         _ramvec[vba+CPMVEC_PIO_PC6]     = inthandler;  /* pio - pc6 */
  87         _ramvec[vba+CPMVEC_TIMER3]      = inthandler;  /* timer 3 */
  88         _ramvec[vba+CPMVEC_RISCTIMER]   = inthandler;  /* reserved */
  89         _ramvec[vba+CPMVEC_PIO_PC5]     = inthandler;  /* pio - pc5 */
  90         _ramvec[vba+CPMVEC_PIO_PC4]     = inthandler;  /* pio - pc4 */
  91         _ramvec[vba+CPMVEC_RESERVED2]   = inthandler;  /* reserved */
  92         _ramvec[vba+CPMVEC_RISCTIMER]   = inthandler;  /* timer table */
  93         _ramvec[vba+CPMVEC_TIMER2]      = inthandler;  /* timer 2 */
  94         _ramvec[vba+CPMVEC_RESERVED3]   = inthandler;  /* reserved */
  95         _ramvec[vba+CPMVEC_IDMA2]       = inthandler;  /* idma 2 */
  96         _ramvec[vba+CPMVEC_IDMA1]       = inthandler;  /* idma 1 */
  97         _ramvec[vba+CPMVEC_SDMA_CB_ERR] = inthandler;  /* sdma channel bus error */
  98         _ramvec[vba+CPMVEC_PIO_PC3]     = inthandler;  /* pio - pc3 */
  99         _ramvec[vba+CPMVEC_PIO_PC2]     = inthandler;  /* pio - pc2 */
 100         /* _ramvec[vba+CPMVEC_TIMER1]      = cpm_isr_timer1; */  /* timer 1 */
 101         _ramvec[vba+CPMVEC_TIMER1]      = inthandler;  /* timer 1 */
 102         _ramvec[vba+CPMVEC_PIO_PC1]     = inthandler;  /* pio - pc1 */
 103         _ramvec[vba+CPMVEC_SCC4]        = inthandler;  /* scc 4 */
 104         _ramvec[vba+CPMVEC_SCC3]        = inthandler;  /* scc 3 */
 105         _ramvec[vba+CPMVEC_SCC2]        = inthandler;  /* scc 2 */
 106         _ramvec[vba+CPMVEC_SCC1]        = inthandler;  /* scc 1 */
 107         _ramvec[vba+CPMVEC_PIO_PC0]     = inthandler;  /* pio - pc0 */
 108
 109
 110         /* turn off all CPM interrupts */
 111         pquicc->intr_cimr = 0x00000000;
 112 }
 113
 114 void enable_vector(unsigned int irq)
 115 {
 116         pquicc->intr_cimr |= (1 << irq);
 117 }
 118
 119 void disable_vector(unsigned int irq)
 120 {
 121         pquicc->intr_cimr &= ~(1 << irq);
 122 }
 123
 124 void ack_vector(unsigned int irq)
 125 {
 126         pquicc->intr_cisr = (1 << irq);
 127 }
 128