Initial import

1 files changed, 138 insertions, 0 deletions

diff --git a/arch/m68k/68360/ints.c b/arch/m68k/68360/ints.c
new file mode 100644
index 000000000..2360fc046
--- /dev/null
+++ b/arch/m68k/68360/ints.c
@@ -0,0 +1,138 @@
+/*
+ * 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);
+	}
+}
+