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[PATCH] CRIS update: IRQ
Use the generic IRQ framework Signed-off-by: Mikael Starvik <starvik@axis.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Mikael Starvik
Linus Torvalds
parent
63245d2cde
commit
2e0cea1dec
6 changed files with 100 additions and 298 deletions
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@ -1,4 +1,4 @@
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/* $Id: irq.c,v 1.2 2004/06/09 05:30:27 starvik Exp $
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/* $Id: irq.c,v 1.4 2005/01/04 12:22:28 starvik Exp $
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*
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* linux/arch/cris/kernel/irq.c
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*
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@ -12,11 +12,13 @@
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*/
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#include <asm/irq.h>
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#include <linux/irq.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/config.h>
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irqvectptr irq_shortcuts[NR_IRQS]; /* vector of shortcut jumps after the irq prologue */
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#define mask_irq(irq_nr) (*R_VECT_MASK_CLR = 1 << (irq_nr));
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#define unmask_irq(irq_nr) (*R_VECT_MASK_SET = 1 << (irq_nr));
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/* don't use set_int_vector, it bypasses the linux interrupt handlers. it is
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* global just so that the kernel gdb can use it.
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@ -102,41 +104,52 @@ static void (*interrupt[NR_IRQS])(void) = {
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IRQ31_interrupt
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};
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static void (*bad_interrupt[NR_IRQS])(void) = {
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NULL, NULL,
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NULL, bad_IRQ3_interrupt,
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bad_IRQ4_interrupt, bad_IRQ5_interrupt,
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bad_IRQ6_interrupt, bad_IRQ7_interrupt,
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bad_IRQ8_interrupt, bad_IRQ9_interrupt,
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bad_IRQ10_interrupt, bad_IRQ11_interrupt,
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bad_IRQ12_interrupt, bad_IRQ13_interrupt,
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NULL, NULL,
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bad_IRQ16_interrupt, bad_IRQ17_interrupt,
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bad_IRQ18_interrupt, bad_IRQ19_interrupt,
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bad_IRQ20_interrupt, bad_IRQ21_interrupt,
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bad_IRQ22_interrupt, bad_IRQ23_interrupt,
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bad_IRQ24_interrupt, bad_IRQ25_interrupt,
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NULL, NULL, NULL, NULL, NULL,
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bad_IRQ31_interrupt
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static void enable_crisv10_irq(unsigned int irq);
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static unsigned int startup_crisv10_irq(unsigned int irq)
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{
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enable_crisv10_irq(irq);
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return 0;
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}
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#define shutdown_crisv10_irq disable_crisv10_irq
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static void enable_crisv10_irq(unsigned int irq)
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{
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unmask_irq(irq);
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}
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static void disable_crisv10_irq(unsigned int irq)
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{
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mask_irq(irq);
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}
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static void ack_crisv10_irq(unsigned int irq)
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{
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}
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static void end_crisv10_irq(unsigned int irq)
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{
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}
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static struct hw_interrupt_type crisv10_irq_type = {
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.typename = "CRISv10",
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.startup = startup_crisv10_irq,
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.shutdown = shutdown_crisv10_irq,
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.enable = enable_crisv10_irq,
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.disable = disable_crisv10_irq,
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.ack = ack_crisv10_irq,
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.end = end_crisv10_irq,
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.set_affinity = NULL
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};
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void arch_setup_irq(int irq)
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{
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set_int_vector(irq, interrupt[irq]);
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}
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void arch_free_irq(int irq)
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{
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set_int_vector(irq, bad_interrupt[irq]);
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}
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void weird_irq(void);
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void system_call(void); /* from entry.S */
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void do_sigtrap(void); /* from entry.S */
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void gdb_handle_breakpoint(void); /* from entry.S */
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/* init_IRQ() is called by start_kernel and is responsible for fixing IRQ masks and
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setting the irq vector table to point to bad_interrupt ptrs.
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setting the irq vector table.
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*/
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void __init
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@ -154,14 +167,15 @@ init_IRQ(void)
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*R_VECT_MASK_CLR = 0xffffffff;
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/* clear the shortcut entry points */
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for(i = 0; i < NR_IRQS; i++)
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irq_shortcuts[i] = NULL;
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for (i = 0; i < 256; i++)
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etrax_irv->v[i] = weird_irq;
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/* Initialize IRQ handler descriptiors. */
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for(i = 2; i < NR_IRQS; i++) {
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irq_desc[i].handler = &crisv10_irq_type;
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set_int_vector(i, interrupt[i]);
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}
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/* the entries in the break vector contain actual code to be
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executed by the associated break handler, rather than just a jump
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address. therefore we need to setup a default breakpoint handler
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@ -170,10 +184,6 @@ init_IRQ(void)
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for (i = 0; i < 16; i++)
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set_break_vector(i, do_sigtrap);
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/* set all etrax irq's to the bad handlers */
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for (i = 2; i < NR_IRQS; i++)
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set_int_vector(i, bad_interrupt[i]);
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/* except IRQ 15 which is the multiple-IRQ handler on Etrax100 */
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set_int_vector(15, multiple_interrupt);
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@ -12,8 +12,6 @@
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* shouldn't result in any weird surprises, and installing new handlers
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* should be easier.
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*
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* Notice Linux/CRIS: these routines do not care about SMP
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*
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*/
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/*
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@ -24,6 +22,7 @@
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/ptrace.h>
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#include <linux/irq.h>
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#include <linux/kernel_stat.h>
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#include <linux/signal.h>
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@ -36,84 +35,56 @@
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#include <linux/init.h>
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#include <linux/seq_file.h>
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#include <linux/errno.h>
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#include <linux/bitops.h>
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#include <linux/spinlock.h>
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#include <asm/io.h>
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/* Defined in arch specific irq.c */
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extern void arch_setup_irq(int irq);
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extern void arch_free_irq(int irq);
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void
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disable_irq(unsigned int irq_nr)
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void ack_bad_irq(unsigned int irq)
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{
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unsigned long flags;
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local_save_flags(flags);
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local_irq_disable();
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mask_irq(irq_nr);
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local_irq_restore(flags);
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printk("unexpected IRQ trap at vector %02x\n", irq);
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}
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void
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enable_irq(unsigned int irq_nr)
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{
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unsigned long flags;
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local_save_flags(flags);
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local_irq_disable();
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unmask_irq(irq_nr);
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local_irq_restore(flags);
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}
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unsigned long
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probe_irq_on()
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{
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return 0;
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}
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EXPORT_SYMBOL(probe_irq_on);
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int
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probe_irq_off(unsigned long x)
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{
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return 0;
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}
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EXPORT_SYMBOL(probe_irq_off);
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/*
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* Initial irq handlers.
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*/
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static struct irqaction *irq_action[NR_IRQS];
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int show_interrupts(struct seq_file *p, void *v)
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{
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int i = *(loff_t *) v;
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int i = *(loff_t *) v, j;
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struct irqaction * action;
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unsigned long flags;
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if (i == 0) {
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seq_printf(p, " ");
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for (j=0; j<NR_CPUS; j++)
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if (cpu_online(j))
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seq_printf(p, "CPU%d ",j);
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seq_putc(p, '\n');
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}
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if (i < NR_IRQS) {
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local_irq_save(flags);
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action = irq_action[i];
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if (!action)
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spin_lock_irqsave(&irq_desc[i].lock, flags);
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action = irq_desc[i].action;
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if (!action)
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goto skip;
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seq_printf(p, "%2d: %10u %c %s",
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i, kstat_this_cpu.irqs[i],
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(action->flags & SA_INTERRUPT) ? '+' : ' ',
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action->name);
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for (action = action->next; action; action = action->next) {
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seq_printf(p, ",%s %s",
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(action->flags & SA_INTERRUPT) ? " +" : "",
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action->name);
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}
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seq_printf(p, "%3d: ",i);
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#ifndef CONFIG_SMP
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seq_printf(p, "%10u ", kstat_irqs(i));
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#else
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for (j = 0; j < NR_CPUS; j++)
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if (cpu_online(j))
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seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
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#endif
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seq_printf(p, " %14s", irq_desc[i].handler->typename);
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seq_printf(p, " %s", action->name);
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for (action=action->next; action; action = action->next)
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seq_printf(p, ", %s", action->name);
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seq_putc(p, '\n');
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skip:
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local_irq_restore(flags);
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spin_unlock_irqrestore(&irq_desc[i].lock, flags);
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}
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return 0;
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}
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/* called by the assembler IRQ entry functions defined in irq.h
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* to dispatch the interrupts to registred handlers
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* interrupts are disabled upon entry - depending on if the
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@ -123,164 +94,17 @@ skip:
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asmlinkage void do_IRQ(int irq, struct pt_regs * regs)
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{
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struct irqaction *action;
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int do_random, cpu;
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int ret, retval = 0;
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cpu = smp_processor_id();
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irq_enter();
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kstat_cpu(cpu).irqs[irq - FIRST_IRQ]++;
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action = irq_action[irq - FIRST_IRQ];
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if (action) {
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if (!(action->flags & SA_INTERRUPT))
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local_irq_enable();
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do_random = 0;
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do {
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ret = action->handler(irq, action->dev_id, regs);
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if (ret == IRQ_HANDLED)
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do_random |= action->flags;
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retval |= ret;
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action = action->next;
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} while (action);
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if (retval != 1) {
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if (retval) {
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printk("irq event %d: bogus retval mask %x\n",
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irq, retval);
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} else {
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printk("irq %d: nobody cared\n", irq);
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}
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}
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if (do_random & SA_SAMPLE_RANDOM)
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add_interrupt_randomness(irq);
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local_irq_disable();
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}
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unsigned long sp;
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irq_enter();
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sp = rdsp();
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if (unlikely((sp & (PAGE_SIZE - 1)) < (PAGE_SIZE/8))) {
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printk("do_IRQ: stack overflow: %lX\n", sp);
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show_stack(NULL, (unsigned long *)sp);
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}
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__do_IRQ(irq, regs);
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irq_exit();
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}
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/* this function links in a handler into the chain of handlers for the
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given irq, and if the irq has never been registred, the appropriate
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handler is entered into the interrupt vector
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*/
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int setup_irq(int irq, struct irqaction * new)
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{
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int shared = 0;
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struct irqaction *old, **p;
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unsigned long flags;
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p = irq_action + irq - FIRST_IRQ;
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if ((old = *p) != NULL) {
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/* Can't share interrupts unless both agree to */
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if (!(old->flags & new->flags & SA_SHIRQ))
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return -EBUSY;
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/* Can't share interrupts unless both are same type */
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if ((old->flags ^ new->flags) & SA_INTERRUPT)
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return -EBUSY;
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/* add new interrupt at end of irq queue */
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do {
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p = &old->next;
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old = *p;
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} while (old);
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shared = 1;
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}
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if (new->flags & SA_SAMPLE_RANDOM)
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rand_initialize_irq(irq);
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local_save_flags(flags);
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local_irq_disable();
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*p = new;
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if (!shared) {
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/* if the irq wasn't registred before, enter it into the vector table
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and unmask it physically
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*/
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arch_setup_irq(irq);
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unmask_irq(irq);
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}
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local_irq_restore(flags);
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return 0;
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}
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/* this function is called by a driver to register an irq handler
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Valid flags:
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SA_INTERRUPT -> it's a fast interrupt, handler called with irq disabled and
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no signal checking etc is performed upon exit
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SA_SHIRQ -> the interrupt can be shared between different handlers, the handler
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is required to check if the irq was "aimed" at it explicitely
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SA_RANDOM -> the interrupt will add to the random generators entropy
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*/
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int request_irq(unsigned int irq,
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irqreturn_t (*handler)(int, void *, struct pt_regs *),
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unsigned long irqflags,
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const char * devname,
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void *dev_id)
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{
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int retval;
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struct irqaction * action;
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if(!handler)
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return -EINVAL;
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/* allocate and fill in a handler structure and setup the irq */
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action = (struct irqaction *)kmalloc(sizeof(struct irqaction), GFP_KERNEL);
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if (!action)
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return -ENOMEM;
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action->handler = handler;
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action->flags = irqflags;
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cpus_clear(action->mask);
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action->name = devname;
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action->next = NULL;
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action->dev_id = dev_id;
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retval = setup_irq(irq, action);
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if (retval)
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kfree(action);
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return retval;
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}
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EXPORT_SYMBOL(request_irq);
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void free_irq(unsigned int irq, void *dev_id)
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{
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struct irqaction * action, **p;
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unsigned long flags;
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if (irq >= NR_IRQS) {
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printk("Trying to free IRQ%d\n",irq);
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return;
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}
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for (p = irq - FIRST_IRQ + irq_action; (action = *p) != NULL; p = &action->next) {
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if (action->dev_id != dev_id)
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continue;
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/* Found it - now free it */
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local_save_flags(flags);
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local_irq_disable();
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*p = action->next;
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if (!irq_action[irq - FIRST_IRQ]) {
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mask_irq(irq);
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arch_free_irq(irq);
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}
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local_irq_restore(flags);
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kfree(action);
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return;
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}
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printk("Trying to free free IRQ%d\n",irq);
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}
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EXPORT_SYMBOL(free_irq);
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void weird_irq(void)
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{
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local_irq_disable();
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@ -288,10 +112,3 @@ void weird_irq(void)
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while(1);
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}
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#if defined(CONFIG_PROC_FS) && defined(CONFIG_SYSCTL)
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/* Used by other archs to show/control IRQ steering during SMP */
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void __init
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init_irq_proc(void)
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{
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}
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#endif
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@ -74,12 +74,9 @@ struct etrax_interrupt_vector {
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};
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extern struct etrax_interrupt_vector *etrax_irv;
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void set_int_vector(int n, irqvectptr addr, irqvectptr saddr);
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void set_int_vector(int n, irqvectptr addr);
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void set_break_vector(int n, irqvectptr addr);
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#define mask_irq(irq_nr) (*R_VECT_MASK_CLR = 1 << (irq_nr));
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#define unmask_irq(irq_nr) (*R_VECT_MASK_SET = 1 << (irq_nr));
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#define __STR(x) #x
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#define STR(x) __STR(x)
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@ -121,26 +118,17 @@ void set_break_vector(int n, irqvectptr addr);
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#define BUILD_IRQ(nr,mask) \
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void IRQ_NAME(nr); \
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void sIRQ_NAME(nr); \
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void BAD_IRQ_NAME(nr); \
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__asm__ ( \
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".text\n\t" \
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"IRQ" #nr "_interrupt:\n\t" \
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SAVE_ALL \
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"sIRQ" #nr "_interrupt:\n\t" /* shortcut for the multiple irq handler */ \
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BLOCK_IRQ(mask,nr) /* this must be done to prevent irq loops when we ei later */ \
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"moveq "#nr",$r10\n\t" \
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"move.d $sp,$r11\n\t" \
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"jsr do_IRQ\n\t" /* irq.c, r10 and r11 are arguments */ \
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UNBLOCK_IRQ(mask) \
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"moveq 0,$r9\n\t" /* make ret_from_intr realise we came from an irq */ \
|
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"jump ret_from_intr\n\t" \
|
||||
"bad_IRQ" #nr "_interrupt:\n\t" \
|
||||
"push $r0\n\t" \
|
||||
BLOCK_IRQ(mask,nr) \
|
||||
"pop $r0\n\t" \
|
||||
"reti\n\t" \
|
||||
"nop\n");
|
||||
"jump ret_from_intr\n\t");
|
||||
|
||||
/* This is subtle. The timer interrupt is crucial and it should not be disabled for
|
||||
* too long. However, if it had been a normal interrupt as per BUILD_IRQ, it would
|
||||
|
|
@ -159,23 +147,14 @@ __asm__ ( \
|
|||
|
||||
#define BUILD_TIMER_IRQ(nr,mask) \
|
||||
void IRQ_NAME(nr); \
|
||||
void sIRQ_NAME(nr); \
|
||||
void BAD_IRQ_NAME(nr); \
|
||||
__asm__ ( \
|
||||
".text\n\t" \
|
||||
"IRQ" #nr "_interrupt:\n\t" \
|
||||
SAVE_ALL \
|
||||
"sIRQ" #nr "_interrupt:\n\t" /* shortcut for the multiple irq handler */ \
|
||||
"moveq "#nr",$r10\n\t" \
|
||||
"move.d $sp,$r11\n\t" \
|
||||
"jsr do_IRQ\n\t" /* irq.c, r10 and r11 are arguments */ \
|
||||
"moveq 0,$r9\n\t" /* make ret_from_intr realise we came from an irq */ \
|
||||
"jump ret_from_intr\n\t" \
|
||||
"bad_IRQ" #nr "_interrupt:\n\t" \
|
||||
"push $r0\n\t" \
|
||||
BLOCK_IRQ(mask,nr) \
|
||||
"pop $r0\n\t" \
|
||||
"reti\n\t" \
|
||||
"nop\n");
|
||||
"jump ret_from_intr\n\t");
|
||||
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -1,18 +1,17 @@
|
|||
#ifndef __ASM_HARDIRQ_H
|
||||
#define __ASM_HARDIRQ_H
|
||||
|
||||
/* only non-SMP supported */
|
||||
|
||||
#include <linux/threads.h>
|
||||
#include <linux/cache.h>
|
||||
|
||||
/* entry.S is sensitive to the offsets of these fields */
|
||||
typedef struct {
|
||||
unsigned int __softirq_pending;
|
||||
} ____cacheline_aligned irq_cpustat_t;
|
||||
|
||||
#include <linux/irq_cpustat.h> /* Standard mappings for irq_cpustat_t above */
|
||||
|
||||
void ack_bad_irq(unsigned int irq);
|
||||
|
||||
#define HARDIRQ_BITS 8
|
||||
|
||||
/*
|
||||
|
|
|
|||
7
include/asm-cris/hw_irq.h
Normal file
7
include/asm-cris/hw_irq.h
Normal file
|
|
@ -0,0 +1,7 @@
|
|||
#ifndef _ASM_HW_IRQ_H
|
||||
#define _ASM_HW_IRQ_H
|
||||
|
||||
static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i) {}
|
||||
|
||||
#endif
|
||||
|
||||
|
|
@ -8,16 +8,6 @@ extern __inline__ int irq_canonicalize(int irq)
|
|||
return irq;
|
||||
}
|
||||
|
||||
extern void disable_irq(unsigned int);
|
||||
extern void enable_irq(unsigned int);
|
||||
|
||||
#define disable_irq_nosync disable_irq
|
||||
#define enable_irq_nosync enable_irq
|
||||
|
||||
struct irqaction;
|
||||
struct pt_regs;
|
||||
int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *);
|
||||
|
||||
#endif /* _ASM_IRQ_H */
|
||||
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue