| /* |
| * linux/arch/$(ARCH)/platform/$(PLATFORM)/ints.c |
| * |
| * 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); |
| |
| extern void *_ramvec[]; |
| |
| /* The number of spurious interrupts */ |
| volatile unsigned int num_spurious; |
| |
| 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_IRQ(void) |
| { |
| int i; |
| 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; |
| |
| for (i = 0; (i < NR_IRQS); i++) { |
| irq_set_chip(i, &intc_irq_chip); |
| irq_set_handler(i, handle_level_irq); |
| } |
| } |
| |