summaryrefslogtreecommitdiff
path: root/arch/sparc/kernel/sun4c_irq.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/sparc/kernel/sun4c_irq.c')
-rw-r--r--arch/sparc/kernel/sun4c_irq.c264
1 files changed, 0 insertions, 264 deletions
diff --git a/arch/sparc/kernel/sun4c_irq.c b/arch/sparc/kernel/sun4c_irq.c
deleted file mode 100644
index f6bf25a2ff8..00000000000
--- a/arch/sparc/kernel/sun4c_irq.c
+++ /dev/null
@@ -1,264 +0,0 @@
-/*
- * sun4c irq support
- *
- * djhr: Hacked out of irq.c into a CPU dependent version.
- *
- * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
- * Copyright (C) 1995 Miguel de Icaza (miguel@nuclecu.unam.mx)
- * Copyright (C) 1995 Pete A. Zaitcev (zaitcev@yahoo.com)
- * Copyright (C) 1996 Dave Redman (djhr@tadpole.co.uk)
- */
-
-#include <linux/init.h>
-
-#include <asm/oplib.h>
-#include <asm/timer.h>
-#include <asm/irq.h>
-#include <asm/io.h>
-
-#include "irq.h"
-
-/* Sun4c interrupts are typically laid out as follows:
- *
- * 1 - Software interrupt, SBUS level 1
- * 2 - SBUS level 2
- * 3 - ESP SCSI, SBUS level 3
- * 4 - Software interrupt
- * 5 - Lance ethernet, SBUS level 4
- * 6 - Software interrupt
- * 7 - Graphics card, SBUS level 5
- * 8 - SBUS level 6
- * 9 - SBUS level 7
- * 10 - Counter timer
- * 11 - Floppy
- * 12 - Zilog uart
- * 13 - CS4231 audio
- * 14 - Profiling timer
- * 15 - NMI
- *
- * The interrupt enable bits in the interrupt mask register are
- * really only used to enable/disable the timer interrupts, and
- * for signalling software interrupts. There is also a master
- * interrupt enable bit in this register.
- *
- * Interrupts are enabled by setting the SUN4C_INT_* bits, they
- * are disabled by clearing those bits.
- */
-
-/*
- * Bit field defines for the interrupt registers on various
- * Sparc machines.
- */
-
-/* The sun4c interrupt register. */
-#define SUN4C_INT_ENABLE 0x01 /* Allow interrupts. */
-#define SUN4C_INT_E14 0x80 /* Enable level 14 IRQ. */
-#define SUN4C_INT_E10 0x20 /* Enable level 10 IRQ. */
-#define SUN4C_INT_E8 0x10 /* Enable level 8 IRQ. */
-#define SUN4C_INT_E6 0x08 /* Enable level 6 IRQ. */
-#define SUN4C_INT_E4 0x04 /* Enable level 4 IRQ. */
-#define SUN4C_INT_E1 0x02 /* Enable level 1 IRQ. */
-
-/*
- * Pointer to the interrupt enable byte
- * Used by entry.S
- */
-unsigned char __iomem *interrupt_enable;
-
-static void sun4c_mask_irq(struct irq_data *data)
-{
- unsigned long mask = (unsigned long)data->chip_data;
-
- if (mask) {
- unsigned long flags;
-
- local_irq_save(flags);
- mask = sbus_readb(interrupt_enable) & ~mask;
- sbus_writeb(mask, interrupt_enable);
- local_irq_restore(flags);
- }
-}
-
-static void sun4c_unmask_irq(struct irq_data *data)
-{
- unsigned long mask = (unsigned long)data->chip_data;
-
- if (mask) {
- unsigned long flags;
-
- local_irq_save(flags);
- mask = sbus_readb(interrupt_enable) | mask;
- sbus_writeb(mask, interrupt_enable);
- local_irq_restore(flags);
- }
-}
-
-static unsigned int sun4c_startup_irq(struct irq_data *data)
-{
- irq_link(data->irq);
- sun4c_unmask_irq(data);
-
- return 0;
-}
-
-static void sun4c_shutdown_irq(struct irq_data *data)
-{
- sun4c_mask_irq(data);
- irq_unlink(data->irq);
-}
-
-static struct irq_chip sun4c_irq = {
- .name = "sun4c",
- .irq_startup = sun4c_startup_irq,
- .irq_shutdown = sun4c_shutdown_irq,
- .irq_mask = sun4c_mask_irq,
- .irq_unmask = sun4c_unmask_irq,
-};
-
-static unsigned int sun4c_build_device_irq(struct platform_device *op,
- unsigned int real_irq)
-{
- unsigned int irq;
-
- if (real_irq >= 16) {
- prom_printf("Bogus sun4c IRQ %u\n", real_irq);
- prom_halt();
- }
-
- irq = irq_alloc(real_irq, real_irq);
- if (irq) {
- unsigned long mask = 0UL;
-
- switch (real_irq) {
- case 1:
- mask = SUN4C_INT_E1;
- break;
- case 8:
- mask = SUN4C_INT_E8;
- break;
- case 10:
- mask = SUN4C_INT_E10;
- break;
- case 14:
- mask = SUN4C_INT_E14;
- break;
- default:
- /* All the rest are either always enabled,
- * or are for signalling software interrupts.
- */
- break;
- }
- irq_set_chip_and_handler_name(irq, &sun4c_irq,
- handle_level_irq, "level");
- irq_set_chip_data(irq, (void *)mask);
- }
- return irq;
-}
-
-struct sun4c_timer_info {
- u32 l10_count;
- u32 l10_limit;
- u32 l14_count;
- u32 l14_limit;
-};
-
-static struct sun4c_timer_info __iomem *sun4c_timers;
-
-static void sun4c_clear_clock_irq(void)
-{
- sbus_readl(&sun4c_timers->l10_limit);
-}
-
-static void sun4c_load_profile_irq(int cpu, unsigned int limit)
-{
- /* Errm.. not sure how to do this.. */
-}
-
-static void __init sun4c_init_timers(irq_handler_t counter_fn)
-{
- const struct linux_prom_irqs *prom_irqs;
- struct device_node *dp;
- unsigned int irq;
- const u32 *addr;
- int err;
-
- dp = of_find_node_by_name(NULL, "counter-timer");
- if (!dp) {
- prom_printf("sun4c_init_timers: Unable to find counter-timer\n");
- prom_halt();
- }
-
- addr = of_get_property(dp, "address", NULL);
- if (!addr) {
- prom_printf("sun4c_init_timers: No address property\n");
- prom_halt();
- }
-
- sun4c_timers = (void __iomem *) (unsigned long) addr[0];
-
- prom_irqs = of_get_property(dp, "intr", NULL);
- of_node_put(dp);
- if (!prom_irqs) {
- prom_printf("sun4c_init_timers: No intr property\n");
- prom_halt();
- }
-
- /* Have the level 10 timer tick at 100HZ. We don't touch the
- * level 14 timer limit since we are letting the prom handle
- * them until we have a real console driver so L1-A works.
- */
- sbus_writel((((1000000/HZ) + 1) << 10), &sun4c_timers->l10_limit);
-
- master_l10_counter = &sun4c_timers->l10_count;
-
- irq = sun4c_build_device_irq(NULL, prom_irqs[0].pri);
- err = request_irq(irq, counter_fn, IRQF_TIMER, "timer", NULL);
- if (err) {
- prom_printf("sun4c_init_timers: request_irq() fails with %d\n", err);
- prom_halt();
- }
-
- /* disable timer interrupt */
- sun4c_mask_irq(irq_get_irq_data(irq));
-}
-
-#ifdef CONFIG_SMP
-static void sun4c_nop(void)
-{
-}
-#endif
-
-void __init sun4c_init_IRQ(void)
-{
- struct device_node *dp;
- const u32 *addr;
-
- dp = of_find_node_by_name(NULL, "interrupt-enable");
- if (!dp) {
- prom_printf("sun4c_init_IRQ: Unable to find interrupt-enable\n");
- prom_halt();
- }
-
- addr = of_get_property(dp, "address", NULL);
- of_node_put(dp);
- if (!addr) {
- prom_printf("sun4c_init_IRQ: No address property\n");
- prom_halt();
- }
-
- interrupt_enable = (void __iomem *) (unsigned long) addr[0];
-
- BTFIXUPSET_CALL(clear_clock_irq, sun4c_clear_clock_irq, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(load_profile_irq, sun4c_load_profile_irq, BTFIXUPCALL_NOP);
-
- sparc_irq_config.init_timers = sun4c_init_timers;
- sparc_irq_config.build_device_irq = sun4c_build_device_irq;
-
-#ifdef CONFIG_SMP
- BTFIXUPSET_CALL(set_cpu_int, sun4c_nop, BTFIXUPCALL_NOP);
- BTFIXUPSET_CALL(clear_cpu_int, sun4c_nop, BTFIXUPCALL_NOP);
- BTFIXUPSET_CALL(set_irq_udt, sun4c_nop, BTFIXUPCALL_NOP);
-#endif
- sbus_writeb(SUN4C_INT_ENABLE, interrupt_enable);
- /* Cannot enable interrupts until OBP ticker is disabled. */
-}
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-11-04 12:06:34 +0000