-/* sun4m_irq.c
- * arch/sparc/kernel/sun4m_irq.c:
+/*
+ * sun4m irq support
*
* djhr: Hacked out of irq.c into a CPU dependent version.
*
* Copyright (C) 1996 Dave Redman (djhr@tadpole.co.uk)
*/
-#include <linux/errno.h>
-#include <linux/linkage.h>
-#include <linux/kernel_stat.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/ptrace.h>
-#include <linux/smp.h>
-#include <linux/interrupt.h>
-#include <linux/init.h>
-#include <linux/ioport.h>
-#include <linux/of.h>
-#include <linux/of_device.h>
-
-#include <asm/ptrace.h>
-#include <asm/processor.h>
-#include <asm/system.h>
-#include <asm/psr.h>
-#include <asm/vaddrs.h>
#include <asm/timer.h>
-#include <asm/openprom.h>
-#include <asm/oplib.h>
#include <asm/traps.h>
#include <asm/pgalloc.h>
#include <asm/pgtable.h>
-#include <asm/smp.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/cacheflush.h>
#include "irq.h"
+#include "kernel.h"
+
+/* Sample sun4m IRQ layout:
+ *
+ * 0x22 - Power
+ * 0x24 - ESP SCSI
+ * 0x26 - Lance ethernet
+ * 0x2b - Floppy
+ * 0x2c - Zilog uart
+ * 0x32 - SBUS level 0
+ * 0x33 - Parallel port, SBUS level 1
+ * 0x35 - SBUS level 2
+ * 0x37 - SBUS level 3
+ * 0x39 - Audio, Graphics card, SBUS level 4
+ * 0x3b - SBUS level 5
+ * 0x3d - SBUS level 6
+ *
+ * Each interrupt source has a mask bit in the interrupt registers.
+ * When the mask bit is set, this blocks interrupt deliver. So you
+ * clear the bit to enable the interrupt.
+ *
+ * Interrupts numbered less than 0x10 are software triggered interrupts
+ * and unused by Linux.
+ *
+ * Interrupt level assignment on sun4m:
+ *
+ * level source
+ * ------------------------------------------------------------
+ * 1 softint-1
+ * 2 softint-2, VME/SBUS level 1
+ * 3 softint-3, VME/SBUS level 2
+ * 4 softint-4, onboard SCSI
+ * 5 softint-5, VME/SBUS level 3
+ * 6 softint-6, onboard ETHERNET
+ * 7 softint-7, VME/SBUS level 4
+ * 8 softint-8, onboard VIDEO
+ * 9 softint-9, VME/SBUS level 5, Module Interrupt
+ * 10 softint-10, system counter/timer
+ * 11 softint-11, VME/SBUS level 6, Floppy
+ * 12 softint-12, Keyboard/Mouse, Serial
+ * 13 softint-13, VME/SBUS level 7, ISDN Audio
+ * 14 softint-14, per-processor counter/timer
+ * 15 softint-15, Asynchronous Errors (broadcast)
+ *
+ * Each interrupt source is masked distinctly in the sun4m interrupt
+ * registers. The PIL level alone is therefore ambiguous, since multiple
+ * interrupt sources map to a single PIL.
+ *
+ * This ambiguity is resolved in the 'intr' property for device nodes
+ * in the OF device tree. Each 'intr' property entry is composed of
+ * two 32-bit words. The first word is the IRQ priority value, which
+ * is what we're intersted in. The second word is the IRQ vector, which
+ * is unused.
+ *
+ * The low 4 bits of the IRQ priority indicate the PIL, and the upper
+ * 4 bits indicate onboard vs. SBUS leveled vs. VME leveled. 0x20
+ * means onboard, 0x30 means SBUS leveled, and 0x40 means VME leveled.
+ *
+ * For example, an 'intr' IRQ priority value of 0x24 is onboard SCSI
+ * whereas a value of 0x33 is SBUS level 2. Here are some sample
+ * 'intr' property IRQ priority values from ss4, ss5, ss10, ss20, and
+ * Tadpole S3 GX systems.
+ *
+ * esp: 0x24 onboard ESP SCSI
+ * le: 0x26 onboard Lance ETHERNET
+ * p9100: 0x32 SBUS level 1 P9100 video
+ * bpp: 0x33 SBUS level 2 BPP parallel port device
+ * DBRI: 0x39 SBUS level 5 DBRI ISDN audio
+ * SUNW,leo: 0x39 SBUS level 5 LEO video
+ * pcmcia: 0x3b SBUS level 6 PCMCIA controller
+ * uctrl: 0x3b SBUS level 6 UCTRL device
+ * modem: 0x3d SBUS level 7 MODEM
+ * zs: 0x2c onboard keyboard/mouse/serial
+ * floppy: 0x2b onboard Floppy
+ * power: 0x22 onboard power device (XXX unknown mask bit XXX)
+ */
+
struct sun4m_irq_percpu {
u32 pending;
/* Dave Redman (djhr@tadpole.co.uk)
* The sun4m interrupt registers.
*/
-#define SUN4M_INT_ENABLE 0x80000000
-#define SUN4M_INT_E14 0x00000080
-#define SUN4M_INT_E10 0x00080000
+#define SUN4M_INT_ENABLE 0x80000000
+#define SUN4M_INT_E14 0x00000080
+#define SUN4M_INT_E10 0x00080000
#define SUN4M_HARD_INT(x) (0x000000001 << (x))
#define SUN4M_SOFT_INT(x) (0x000010000 << (x))
#define OBP_INT_LEVEL_SBUS 0x30
#define OBP_INT_LEVEL_VME 0x40
-/* Interrupt level assignment on sun4m:
- *
- * level source
- * ------------------------------------------------------------
- * 1 softint-1
- * 2 softint-2, VME/SBUS level 1
- * 3 softint-3, VME/SBUS level 2
- * 4 softint-4, onboard SCSI
- * 5 softint-5, VME/SBUS level 3
- * 6 softint-6, onboard ETHERNET
- * 7 softint-7, VME/SBUS level 4
- * 8 softint-8, onboard VIDEO
- * 9 softint-9, VME/SBUS level 5, Module Interrupt
- * 10 softint-10, system counter/timer
- * 11 softint-11, VME/SBUS level 6, Floppy
- * 12 softint-12, Keyboard/Mouse, Serial
- * 13 softint-13, VME/SBUS level 7, ISDN Audio
- * 14 softint-14, per-processor counter/timer
- * 15 softint-15, Asynchronous Errors (broadcast)
- *
- * Each interrupt source is masked distinctly in the sun4m interrupt
- * registers. The PIL level alone is therefore ambiguous, since multiple
- * interrupt sources map to a single PIL.
- *
- * This ambiguity is resolved in the 'intr' property for device nodes
- * in the OF device tree. Each 'intr' property entry is composed of
- * two 32-bit words. The first word is the IRQ priority value, which
- * is what we're intersted in. The second word is the IRQ vector, which
- * is unused.
- *
- * The low 4 bits of the IRQ priority indicate the PIL, and the upper
- * 4 bits indicate onboard vs. SBUS leveled vs. VME leveled. 0x20
- * means onboard, 0x30 means SBUS leveled, and 0x40 means VME leveled.
- *
- * For example, an 'intr' IRQ priority value of 0x24 is onboard SCSI
- * whereas a value of 0x33 is SBUS level 2. Here are some sample
- * 'intr' property IRQ priority values from ss4, ss5, ss10, ss20, and
- * Tadpole S3 GX systems.
- *
- * esp: 0x24 onboard ESP SCSI
- * le: 0x26 onboard Lance ETHERNET
- * p9100: 0x32 SBUS level 1 P9100 video
- * bpp: 0x33 SBUS level 2 BPP parallel port device
- * DBRI: 0x39 SBUS level 5 DBRI ISDN audio
- * SUNW,leo: 0x39 SBUS level 5 LEO video
- * pcmcia: 0x3b SBUS level 6 PCMCIA controller
- * uctrl: 0x3b SBUS level 6 UCTRL device
- * modem: 0x3d SBUS level 7 MODEM
- * zs: 0x2c onboard keyboard/mouse/serial
- * floppy: 0x2b onboard Floppy
- * power: 0x22 onboard power device (XXX unknown mask bit XXX)
- */
-
static unsigned long irq_mask[0x50] = {
/* SMP */
0, SUN4M_SOFT_INT(1),
static unsigned long sun4m_get_irqmask(unsigned int irq)
{
unsigned long mask;
-
+
if (irq < 0x50)
mask = irq_mask[irq];
else
sbus_writel(mask, &sun4m_irq_global->mask_set);
else
sbus_writel(mask, &sun4m_irq_percpu[cpu]->set);
- local_irq_restore(flags);
+ local_irq_restore(flags);
}
static void sun4m_enable_irq(unsigned int irq_nr)
int cpu = smp_processor_id();
/* Dreadful floppy hack. When we use 0x2b instead of
- * 0x0b the system blows (it starts to whistle!).
- * So we continue to use 0x0b. Fixme ASAP. --P3
- */
- if (irq_nr != 0x0b) {
+ * 0x0b the system blows (it starts to whistle!).
+ * So we continue to use 0x0b. Fixme ASAP. --P3
+ */
+ if (irq_nr != 0x0b) {
mask = sun4m_get_irqmask(irq_nr);
local_irq_save(flags);
if (irq_nr > 15)
sbus_writel(mask, &sun4m_irq_global->mask_clear);
else
sbus_writel(mask, &sun4m_irq_percpu[cpu]->clear);
- local_irq_restore(flags);
+ local_irq_restore(flags);
} else {
local_irq_save(flags);
sbus_writel(SUN4M_INT_FLOPPY, &sun4m_irq_global->mask_clear);
/*12*/ SUN4M_INT_SERIAL | SUN4M_INT_KBDMS,
/*13*/ SUN4M_INT_SBUS(6) | SUN4M_INT_VME(6) | SUN4M_INT_AUDIO,
/*14*/ SUN4M_INT_E14,
-/*15*/ SUN4M_INT_ERROR
+/*15*/ SUN4M_INT_ERROR,
};
/* We assume the caller has disabled local interrupts when these are called,
static void sun4m_send_ipi(int cpu, int level)
{
unsigned long mask = sun4m_get_irqmask(level);
+
sbus_writel(mask, &sun4m_irq_percpu[cpu]->set);
}
static void sun4m_clear_ipi(int cpu, int level)
{
unsigned long mask = sun4m_get_irqmask(level);
+
sbus_writel(mask, &sun4m_irq_percpu[cpu]->clear);
}
static struct sun4m_timer_global __iomem *timers_global;
-#define TIMER_IRQ (OBP_INT_LEVEL_ONBOARD | 10)
+#define TIMER_IRQ (OBP_INT_LEVEL_ONBOARD | 10)
unsigned int lvl14_resolution = (((1000000/HZ) + 1) << 10);
#ifdef CONFIG_SMP
{
unsigned long flags;
- extern unsigned long lvl14_save[4];
struct tt_entry *trap_table = &sparc_ttable[SP_TRAP_IRQ1 + (14 - 1)];
/* For SMP we use the level 14 ticker, however the bootup code
projects / karo-tx-linux.git / blobdiff