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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/m68k/68360/ints.c
Initial import
Diffstat (limited to 'arch/m68k/68360/ints.c')
-rw-r--r--arch/m68k/68360/ints.c138
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);
+ }
+}
+