/*
- * linux/arch/m68k/amiga/amiints.c -- Amiga Linux interrupt handling code
+ * Amiga Linux interrupt handling code
*
* 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.
- *
- * 11/07/96: rewritten interrupt handling, irq lists are exists now only for
- * this sources where it makes sense (VERTB/PORTS/EXTER) and you must
- * be careful that dev_id for this sources is unique since this the
- * only possibility to distinguish between different handlers for
- * free_irq. irq lists also have different irq flags:
- * - IRQ_FLG_FAST: handler is inserted at top of list (after other
- * fast handlers)
- * - IRQ_FLG_SLOW: handler is inserted at bottom of list and before
- * they're executed irq level is set to the previous
- * one, but handlers don't need to be reentrant, if
- * reentrance occurred, slow handlers will be just
- * called again.
- * The whole interrupt handling for CIAs is moved to cia.c
- * /Roman Zippel
- *
- * 07/08/99: rewamp of the interrupt handling - we now have two types of
- * interrupts, normal and fast handlers, fast handlers being
- * marked with IRQF_DISABLED and runs with all other interrupts
- * disabled. Normal interrupts disable their own source but
- * run with all other interrupt sources enabled.
- * PORTS and EXTER interrupts are always shared even if the
- * drivers do not explicitly mark this when calling
- * request_irq which they really should do.
- * This is similar to the way interrupts are handled on all
- * other architectures and makes a ton of sense besides
- * having the advantage of making it easier to share
- * drivers.
- * /Jes
*/
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/errno.h>
+#ifdef CONFIG_GENERIC_HARDIRQS
+#include <linux/irq.h>
+#endif
#include <asm/irq.h>
#include <asm/traps.h>
#include <asm/amigaints.h>
#include <asm/amipcmcia.h>
-static void amiga_irq_enable(struct irq_data *data);
-static void amiga_irq_disable(struct irq_data *data);
-static irqreturn_t ami_int1(int irq, void *dev_id);
-static irqreturn_t ami_int3(int irq, void *dev_id);
-static irqreturn_t ami_int4(int irq, void *dev_id);
-static irqreturn_t ami_int5(int irq, void *dev_id);
+
+/*
+ * Enable/disable a particular machine specific interrupt source.
+ * Note that this may affect other interrupts in case of a shared interrupt.
+ * This function should only be called for a _very_ short time to change some
+ * internal data, that may not be changed by the interrupt at the same time.
+ */
+
+static void amiga_irq_enable(struct irq_data *data)
+{
+ amiga_custom.intena = IF_SETCLR | (1 << (data->irq - IRQ_USER));
+}
+
+static void amiga_irq_disable(struct irq_data *data)
+{
+ amiga_custom.intena = 1 << (data->irq - IRQ_USER);
+}
static struct irq_chip amiga_irq_chip = {
.name = "amiga",
.irq_disable = amiga_irq_disable,
};
+
/*
- * void amiga_init_IRQ(void)
- *
- * Parameters: None
- *
- * Returns: Nothing
- *
- * This function should be called during kernel startup to initialize
- * the amiga IRQ handling routines.
+ * The builtin Amiga hardware interrupt handlers.
*/
-void __init amiga_init_IRQ(void)
+#ifdef CONFIG_GENERIC_HARDIRQS
+static void ami_int1(unsigned int irq, struct irq_desc *desc)
{
- if (request_irq(IRQ_AUTO_1, ami_int1, 0, "int1", NULL))
- pr_err("Couldn't register int%d\n", 1);
- if (request_irq(IRQ_AUTO_3, ami_int3, 0, "int3", NULL))
- pr_err("Couldn't register int%d\n", 3);
- if (request_irq(IRQ_AUTO_4, ami_int4, 0, "int4", NULL))
- pr_err("Couldn't register int%d\n", 4);
- if (request_irq(IRQ_AUTO_5, ami_int5, 0, "int5", NULL))
- pr_err("Couldn't register int%d\n", 5);
-
- m68k_setup_irq_chip(&amiga_irq_chip, IRQ_USER, AMI_STD_IRQS);
+ unsigned short ints = amiga_custom.intreqr & amiga_custom.intenar;
- /* turn off PCMCIA interrupts */
- if (AMIGAHW_PRESENT(PCMCIA))
- gayle.inten = GAYLE_IRQ_IDE;
+ /* if serial transmit buffer empty, interrupt */
+ if (ints & IF_TBE) {
+ amiga_custom.intreq = IF_TBE;
+ generic_handle_irq(IRQ_AMIGA_TBE);
+ }
- /* turn off all interrupts and enable the master interrupt bit */
- amiga_custom.intena = 0x7fff;
- amiga_custom.intreq = 0x7fff;
- amiga_custom.intena = IF_SETCLR | IF_INTEN;
+ /* if floppy disk transfer complete, interrupt */
+ if (ints & IF_DSKBLK) {
+ amiga_custom.intreq = IF_DSKBLK;
+ generic_handle_irq(IRQ_AMIGA_DSKBLK);
+ }
- cia_init_IRQ(&ciaa_base);
- cia_init_IRQ(&ciab_base);
+ /* if software interrupt set, interrupt */
+ if (ints & IF_SOFT) {
+ amiga_custom.intreq = IF_SOFT;
+ generic_handle_irq(IRQ_AMIGA_SOFT);
+ }
}
-/*
- * Enable/disable a particular machine specific interrupt source.
- * Note that this may affect other interrupts in case of a shared interrupt.
- * This function should only be called for a _very_ short time to change some
- * internal data, that may not be changed by the interrupt at the same time.
- */
-
-static void amiga_irq_enable(struct irq_data *data)
+static void ami_int3(unsigned int irq, struct irq_desc *desc)
{
- amiga_custom.intena = IF_SETCLR | (1 << (data->irq - IRQ_USER));
+ unsigned short ints = amiga_custom.intreqr & amiga_custom.intenar;
+
+ /* if a blitter interrupt */
+ if (ints & IF_BLIT) {
+ amiga_custom.intreq = IF_BLIT;
+ generic_handle_irq(IRQ_AMIGA_BLIT);
+ }
+
+ /* if a copper interrupt */
+ if (ints & IF_COPER) {
+ amiga_custom.intreq = IF_COPER;
+ generic_handle_irq(IRQ_AMIGA_COPPER);
+ }
+
+ /* if a vertical blank interrupt */
+ if (ints & IF_VERTB) {
+ amiga_custom.intreq = IF_VERTB;
+ generic_handle_irq(IRQ_AMIGA_VERTB);
+ }
}
-static void amiga_irq_disable(struct irq_data *data)
+static void ami_int4(unsigned int irq, struct irq_desc *desc)
{
- amiga_custom.intena = 1 << (data->irq - IRQ_USER);
+ unsigned short ints = amiga_custom.intreqr & amiga_custom.intenar;
+
+ /* if audio 0 interrupt */
+ if (ints & IF_AUD0) {
+ amiga_custom.intreq = IF_AUD0;
+ generic_handle_irq(IRQ_AMIGA_AUD0);
+ }
+
+ /* if audio 1 interrupt */
+ if (ints & IF_AUD1) {
+ amiga_custom.intreq = IF_AUD1;
+ generic_handle_irq(IRQ_AMIGA_AUD1);
+ }
+
+ /* if audio 2 interrupt */
+ if (ints & IF_AUD2) {
+ amiga_custom.intreq = IF_AUD2;
+ generic_handle_irq(IRQ_AMIGA_AUD2);
+ }
+
+ /* if audio 3 interrupt */
+ if (ints & IF_AUD3) {
+ amiga_custom.intreq = IF_AUD3;
+ generic_handle_irq(IRQ_AMIGA_AUD3);
+ }
}
-/*
- * The builtin Amiga hardware interrupt handlers.
- */
+static void ami_int5(unsigned int irq, struct irq_desc *desc)
+{
+ unsigned short ints = amiga_custom.intreqr & amiga_custom.intenar;
+
+ /* if serial receive buffer full interrupt */
+ if (ints & IF_RBF) {
+ /* acknowledge of IF_RBF must be done by the serial interrupt */
+ generic_handle_irq(IRQ_AMIGA_RBF);
+ }
+ /* if a disk sync interrupt */
+ if (ints & IF_DSKSYN) {
+ amiga_custom.intreq = IF_DSKSYN;
+ generic_handle_irq(IRQ_AMIGA_DSKSYN);
+ }
+}
+#else /* !CONFIG_GENERIC_HARDIRQS */
static irqreturn_t ami_int1(int irq, void *dev_id)
{
unsigned short ints = amiga_custom.intreqr & amiga_custom.intenar;
/* if serial transmit buffer empty, interrupt */
if (ints & IF_TBE) {
amiga_custom.intreq = IF_TBE;
- m68k_handle_int(IRQ_AMIGA_TBE);
+ generic_handle_irq(IRQ_AMIGA_TBE);
}
/* if floppy disk transfer complete, interrupt */
if (ints & IF_DSKBLK) {
amiga_custom.intreq = IF_DSKBLK;
- m68k_handle_int(IRQ_AMIGA_DSKBLK);
+ generic_handle_irq(IRQ_AMIGA_DSKBLK);
}
/* if software interrupt set, interrupt */
if (ints & IF_SOFT) {
amiga_custom.intreq = IF_SOFT;
- m68k_handle_int(IRQ_AMIGA_SOFT);
+ generic_handle_irq(IRQ_AMIGA_SOFT);
}
return IRQ_HANDLED;
}
/* if a blitter interrupt */
if (ints & IF_BLIT) {
amiga_custom.intreq = IF_BLIT;
- m68k_handle_int(IRQ_AMIGA_BLIT);
+ generic_handle_irq(IRQ_AMIGA_BLIT);
}
/* if a copper interrupt */
if (ints & IF_COPER) {
amiga_custom.intreq = IF_COPER;
- m68k_handle_int(IRQ_AMIGA_COPPER);
+ generic_handle_irq(IRQ_AMIGA_COPPER);
}
/* if a vertical blank interrupt */
if (ints & IF_VERTB) {
amiga_custom.intreq = IF_VERTB;
- m68k_handle_int(IRQ_AMIGA_VERTB);
+ generic_handle_irq(IRQ_AMIGA_VERTB);
}
return IRQ_HANDLED;
}
/* if audio 0 interrupt */
if (ints & IF_AUD0) {
amiga_custom.intreq = IF_AUD0;
- m68k_handle_int(IRQ_AMIGA_AUD0);
+ generic_handle_irq(IRQ_AMIGA_AUD0);
}
/* if audio 1 interrupt */
if (ints & IF_AUD1) {
amiga_custom.intreq = IF_AUD1;
- m68k_handle_int(IRQ_AMIGA_AUD1);
+ generic_handle_irq(IRQ_AMIGA_AUD1);
}
/* if audio 2 interrupt */
if (ints & IF_AUD2) {
amiga_custom.intreq = IF_AUD2;
- m68k_handle_int(IRQ_AMIGA_AUD2);
+ generic_handle_irq(IRQ_AMIGA_AUD2);
}
/* if audio 3 interrupt */
if (ints & IF_AUD3) {
amiga_custom.intreq = IF_AUD3;
- m68k_handle_int(IRQ_AMIGA_AUD3);
+ generic_handle_irq(IRQ_AMIGA_AUD3);
}
return IRQ_HANDLED;
}
/* if serial receive buffer full interrupt */
if (ints & IF_RBF) {
/* acknowledge of IF_RBF must be done by the serial interrupt */
- m68k_handle_int(IRQ_AMIGA_RBF);
+ generic_handle_irq(IRQ_AMIGA_RBF);
}
/* if a disk sync interrupt */
if (ints & IF_DSKSYN) {
amiga_custom.intreq = IF_DSKSYN;
- m68k_handle_int(IRQ_AMIGA_DSKSYN);
+ generic_handle_irq(IRQ_AMIGA_DSKSYN);
}
return IRQ_HANDLED;
}
+#endif /* !CONFIG_GENERIC_HARDIRQS */
+
+
+/*
+ * void amiga_init_IRQ(void)
+ *
+ * Parameters: None
+ *
+ * Returns: Nothing
+ *
+ * This function should be called during kernel startup to initialize
+ * the amiga IRQ handling routines.
+ */
+
+void __init amiga_init_IRQ(void)
+{
+#ifdef CONFIG_GENERIC_HARDIRQS
+ m68k_setup_irq_controller(&amiga_irq_chip, handle_simple_irq, IRQ_USER,
+ AMI_STD_IRQS);
+
+ irq_set_chained_handler(IRQ_AUTO_1, ami_int1);
+ irq_set_chained_handler(IRQ_AUTO_3, ami_int3);
+ irq_set_chained_handler(IRQ_AUTO_4, ami_int4);
+ irq_set_chained_handler(IRQ_AUTO_5, ami_int5);
+#else /* !CONFIG_GENERIC_HARDIRQS */
+ if (request_irq(IRQ_AUTO_1, ami_int1, 0, "int1", NULL))
+ pr_err("Couldn't register int%d\n", 1);
+ if (request_irq(IRQ_AUTO_3, ami_int3, 0, "int3", NULL))
+ pr_err("Couldn't register int%d\n", 3);
+ if (request_irq(IRQ_AUTO_4, ami_int4, 0, "int4", NULL))
+ pr_err("Couldn't register int%d\n", 4);
+ if (request_irq(IRQ_AUTO_5, ami_int5, 0, "int5", NULL))
+ pr_err("Couldn't register int%d\n", 5);
+
+ m68k_setup_irq_controller(&amiga_irq_chip, handle_simple_irq, IRQ_USER,
+ AMI_STD_IRQS);
+#endif /* !CONFIG_GENERIC_HARDIRQS */
+
+ /* turn off PCMCIA interrupts */
+ if (AMIGAHW_PRESENT(PCMCIA))
+ gayle.inten = GAYLE_IRQ_IDE;
+
+ /* turn off all interrupts and enable the master interrupt bit */
+ amiga_custom.intena = 0x7fff;
+ amiga_custom.intreq = 0x7fff;
+ amiga_custom.intena = IF_SETCLR | IF_INTEN;
+
+ cia_init_IRQ(&ciaa_base);
+ cia_init_IRQ(&ciab_base);
+}
projects / platform / adaptation / renesas_rcar / renesas_kernel.git / blobdiff