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h8300 generic irq

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h8300 using generic irq handler patch.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Yoshinori Sato 2007-05-06 14:50:35 -07:00 committed by Linus Torvalds
parent aeecf3142d
commit c728d60455
15 changed files with 237 additions and 108 deletions
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4
arch/h8300/Kconfig
View file

@ -49,6 +49,10 @@ config GENERIC_HWEIGHT
bool
default y
config GENERIC_HARDIRQS
bool
default y
config GENERIC_CALIBRATE_DELAY
bool
default y

2
arch/h8300/Makefile
View file

@ -41,7 +41,7 @@ LDFLAGS += $(ldflags-y)
CROSS_COMPILE = h8300-elf-
LIBGCC := $(shell $(CROSS-COMPILE)$(CC) $(CFLAGS) -print-libgcc-file-name)
head-y := arch/$(ARCH)/platform/$(platform-y)/$(board-y)/crt0_$(model-y).o
head-y := arch/$(ARCH)/platform/$(PLATFORM)/$(BOARD)/crt0_$(MODEL).o
core-y += arch/$(ARCH)/kernel/ \
arch/$(ARCH)/mm/

6
arch/h8300/kernel/Makefile
View file

@ -4,10 +4,8 @@
extra-y := vmlinux.lds
obj-y := process.o traps.o ptrace.o ints.o \
obj-y := process.o traps.o ptrace.o irq.o \
sys_h8300.o time.o semaphore.o signal.o \
setup.o gpio.o init_task.o syscalls.o devres.o
devres-y = ../../../kernel/irq/devres.o
setup.o gpio.o init_task.o syscalls.o
obj-$(CONFIG_MODULES) += module.o h8300_ksyms.o

211
arch/h8300/kernel/irq.c Normal file
View file

@ -0,0 +1,211 @@
/*
* linux/arch/h8300/kernel/irq.c
*
* Copyright 2007 Yoshinori Sato <ysato@users.sourceforge.jp>
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/kernel_stat.h>
#include <linux/seq_file.h>
#include <linux/init.h>
#include <linux/random.h>
#include <linux/bootmem.h>
#include <linux/irq.h>
#include <asm/system.h>
#include <asm/traps.h>
#include <asm/io.h>
#include <asm/setup.h>
#include <asm/errno.h>
/*#define DEBUG*/
extern unsigned long *interrupt_redirect_table;
extern const int h8300_saved_vectors[];
extern const unsigned long h8300_trap_table[];
int h8300_enable_irq_pin(unsigned int irq);
void h8300_disable_irq_pin(unsigned int irq);
#define CPU_VECTOR ((unsigned long *)0x000000)
#define ADDR_MASK (0xffffff)
static inline int is_ext_irq(unsigned int irq)
{
return (irq >= EXT_IRQ0 && irq <= (EXT_IRQ0 + EXT_IRQS));
}
static void h8300_enable_irq(unsigned int irq)
{
if (is_ext_irq(irq))
IER_REGS |= 1 << (irq - EXT_IRQ0);
}
static void h8300_disable_irq(unsigned int irq)
{
if (is_ext_irq(irq))
IER_REGS &= ~(1 << (irq - EXT_IRQ0));
}
static void h8300_end_irq(unsigned int irq)
{
}
static unsigned int h8300_startup_irq(unsigned int irq)
{
if (is_ext_irq(irq))
return h8300_enable_irq_pin(irq);
else
return 0;
}
static void h8300_shutdown_irq(unsigned int irq)
{
if (is_ext_irq(irq))
h8300_disable_irq_pin(irq);
}
/*
* h8300 interrupt controler implementation
*/
struct irq_chip h8300irq_chip = {
.name = "H8300-INTC",
.startup = h8300_startup_irq,
.shutdown = h8300_shutdown_irq,
.enable = h8300_enable_irq,
.disable = h8300_disable_irq,
.ack = NULL,
.end = h8300_end_irq,
};
void ack_bad_irq(unsigned int irq)
{
printk("unexpected IRQ trap at vector %02x\n", irq);
}
#if defined(CONFIG_RAMKERNEL)
static unsigned long __init *get_vector_address(void)
{
unsigned long *rom_vector = CPU_VECTOR;
unsigned long base,tmp;
int vec_no;
base = rom_vector[EXT_IRQ0] & ADDR_MASK;
/* check romvector format */
for (vec_no = EXT_IRQ1; vec_no <= EXT_IRQ0+EXT_IRQS; vec_no++) {
if ((base+(vec_no - EXT_IRQ0)*4) != (rom_vector[vec_no] & ADDR_MASK))
return NULL;
}
/* ramvector base address */
base -= EXT_IRQ0*4;
/* writerble check */
tmp = ~(*(volatile unsigned long *)base);
(*(volatile unsigned long *)base) = tmp;
if ((*(volatile unsigned long *)base) != tmp)
return NULL;
return (unsigned long *)base;
}
static void __init setup_vector(void)
{
int i;
unsigned long *ramvec,*ramvec_p;
const unsigned long *trap_entry;
const int *saved_vector;
ramvec = get_vector_address();
if (ramvec == NULL)
panic("interrupt vector serup failed.");
else
printk(KERN_INFO "virtual vector at 0x%08lx\n",(unsigned long)ramvec);
/* create redirect table */
ramvec_p = ramvec;
trap_entry = h8300_trap_table;
saved_vector = h8300_saved_vectors;
for ( i = 0; i < NR_IRQS; i++) {
if (i == *saved_vector) {
ramvec_p++;
saved_vector++;
} else {
if ( i < NR_TRAPS ) {
if (*trap_entry)
*ramvec_p = VECTOR(*trap_entry);
ramvec_p++;
trap_entry++;
} else
*ramvec_p++ = REDIRECT(interrupt_entry);
}
}
interrupt_redirect_table = ramvec;
#ifdef DEBUG
ramvec_p = ramvec;
for (i = 0; i < NR_IRQS; i++) {
if ((i % 8) == 0)
printk(KERN_DEBUG "\n%p: ",ramvec_p);
printk(KERN_DEBUG "%p ",*ramvec_p);
ramvec_p++;
}
printk(KERN_DEBUG "\n");
#endif
}
#else
#define setup_vector() do { } while(0)
#endif
void __init init_IRQ(void)
{
int c;
setup_vector();
for (c = 0; c < NR_IRQS; c++) {
irq_desc[c].status = IRQ_DISABLED;
irq_desc[c].action = NULL;
irq_desc[c].depth = 1;
irq_desc[c].chip = &h8300irq_chip;
}
}
asmlinkage void do_IRQ(int irq)
{
irq_enter();
__do_IRQ(irq);
irq_exit();
}
#if defined(CONFIG_PROC_FS)
int show_interrupts(struct seq_file *p, void *v)
{
int i = *(loff_t *) v, j;
struct irqaction * action;
unsigned long flags;
if (i == 0)
seq_puts(p, " CPU0");
if (i < NR_IRQS) {
spin_lock_irqsave(&irq_desc[i].lock, flags);
action = irq_desc[i].action;
if (!action)
goto unlock;
seq_printf(p, "%3d: ",i);
seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
seq_printf(p, " %14s", irq_desc[i].chip->name);
seq_printf(p, "-%-8s", irq_desc[i].name);
seq_printf(p, " %s", action->name);
for (action=action->next; action; action = action->next)
seq_printf(p, ", %s", action->name);
seq_putc(p, '\n');
unlock:
spin_unlock_irqrestore(&irq_desc[i].lock, flags);
}
return 0;
}
#endif

3
arch/h8300/kernel/setup.c
View file

@ -33,10 +33,7 @@
#include <asm/setup.h>
#include <asm/irq.h>
#ifdef CONFIG_BLK_DEV_INITRD
#include <asm/pgtable.h>
#endif
#if defined(__H8300H__)
#define CPU "H8/300H"

2
arch/h8300/kernel/time.c
View file

@ -44,7 +44,7 @@ static void timer_interrupt(int irq, void *dummy, struct pt_regs * regs)
#ifndef CONFIG_SMP
update_process_times(user_mode(regs));
#endif
profile_tick(CPU_PROFILING, regs);
profile_tick(CPU_PROFILING);
}
void time_init(void)

4
arch/h8300/mm/kmap.c
View file

@ -24,12 +24,14 @@
#undef DEBUG
#define VIRT_OFFSET (0x01000000)
/*
* Map some physical address range into the kernel address space.
*/
void *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag)
{
return (void *)physaddr;
return (void *)(physaddr + VIRT_OFFSET);
}
/*

2
arch/h8300/platform/h8300h/Makefile
View file

@ -4,4 +4,4 @@
# Reuse any files we can from the H8/300H
#
obj-y := entry.o ints_h8300h.o ptrace_h8300h.o
obj-y := entry.o irq_pin.o ptrace_h8300h.o

4
arch/h8300/platform/h8300h/entry.S
View file

@ -30,12 +30,12 @@
mov.l er0,@-sp
stc ccr,r0l /* check kernel mode */
orc #0x10,ccr
btst #4,r0l
bne 5f
mov.l sp,@SYMBOL_NAME(sw_usp) /* user mode */
mov.l @sp,er0
orc #0x10,ccr
mov.l @SYMBOL_NAME(sw_ksp),sp
sub.l #(LRET-LORIG),sp /* allocate LORIG - LRET */
mov.l er0,@-sp
@ -165,7 +165,7 @@ SYMBOL_NAME_LABEL(interrupt_entry)
dec.l #1,er0
mov.l sp,er1
subs #4,er1 /* adjust ret_pc */
jsr @SYMBOL_NAME(process_int)
jsr @SYMBOL_NAME(do_IRQ)
mov.l @SYMBOL_NAME(irq_stat)+CPUSTAT_SOFTIRQ_PENDING,er0
beq 1f
jsr @SYMBOL_NAME(do_softirq)

2
arch/h8300/platform/h8300h/generic/Makefile
View file

@ -2,5 +2,5 @@
# Makefile for the linux kernel.
#
extra-y := crt0_$(MODEL).o
obj-y := timer.o
extra-y = crt0_$(MODEL).o

85
arch/h8300/platform/h8300h/ints_h8300h.c
View file

@ -1,85 +0,0 @@
/*
* linux/arch/h8300/platform/h8300h/ints_h8300h.c
* Interrupt handling CPU variants
*
* Yoshinori Sato <ysato@users.sourceforge.jp>
*
*/
#include <linux/init.h>
#include <linux/errno.h>
#include <asm/ptrace.h>
#include <asm/traps.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/gpio.h>
#include <asm/regs306x.h>
/* saved vector list */
const int __initdata h8300_saved_vectors[]={
#if defined(CONFIG_GDB_DEBUG)
TRAP3_VEC,
#endif
-1
};
/* trap entry table */
const unsigned long __initdata h8300_trap_table[NR_TRAPS]={
0,0,0,0,0,0,0,0,
(unsigned long)system_call, /* TRAPA #0 */
0,0,
(unsigned long)trace_break, /* TRAPA #3 */
};
int h8300_enable_irq_pin(unsigned int irq)
{
int bitmask;
if (irq < EXT_IRQ0 || irq > EXT_IRQ5)
return 0;
/* initialize IRQ pin */
bitmask = 1 << (irq - EXT_IRQ0);
switch(irq) {
case EXT_IRQ0:
case EXT_IRQ1:
case EXT_IRQ2:
case EXT_IRQ3:
if (H8300_GPIO_RESERVE(H8300_GPIO_P8, bitmask) == 0)
return -EBUSY;
H8300_GPIO_DDR(H8300_GPIO_P8, bitmask, H8300_GPIO_INPUT);
break;
case EXT_IRQ4:
case EXT_IRQ5:
if (H8300_GPIO_RESERVE(H8300_GPIO_P9, bitmask) == 0)
return -EBUSY;
H8300_GPIO_DDR(H8300_GPIO_P9, bitmask, H8300_GPIO_INPUT);
break;
}
return 0;
}
void h8300_disable_irq_pin(unsigned int irq)
{
int bitmask;
if (irq < EXT_IRQ0 || irq > EXT_IRQ5)
return;
/* disable interrupt & release IRQ pin */
bitmask = 1 << (irq - EXT_IRQ0);
switch(irq) {
case EXT_IRQ0:
case EXT_IRQ1:
case EXT_IRQ2:
case EXT_IRQ3:
*(volatile unsigned char *)IER &= ~bitmask;
H8300_GPIO_FREE(H8300_GPIO_P8, bitmask);
break ;
case EXT_IRQ4:
case EXT_IRQ5:
*(volatile unsigned char *)IER &= ~bitmask;
H8300_GPIO_FREE(H8300_GPIO_P9, bitmask);
break;
}
}

17
arch/h8300/platform/h8s/entry.S
View file

@ -31,12 +31,13 @@
mov.l er0,@-sp
stc ccr,r0l /* check kernel mode */
orc #0x10,ccr
btst #4,r0l
bne 5f
mov.l sp,@SYMBOL_NAME(sw_usp) /* user mode */
mov.l @sp,er0
/* user mode */
mov.l sp,@SYMBOL_NAME(sw_usp)
mov.l @sp,er0 /* restore saved er0 */
orc #0x10,ccr /* switch kernel stack */
mov.l @SYMBOL_NAME(sw_ksp),sp
sub.l #(LRET-LORIG),sp /* allocate LORIG - LRET */
stm.l er0-er3,@-sp
@ -55,8 +56,9 @@
mov.l er0,@(LER0-LER3:16,sp) /* copy ER0 */
bra 6f
5:
mov.l @sp,er0 /* kernel mode */
subs #2,sp /* dummy ccr */
/* kernel mode */
mov.l @sp,er0 /* restore saved er0 */
subs #2,sp /* set dummy ccr */
stm.l er0-er3,@-sp
mov.w @(LRET-LER3:16,sp),r1 /* copy old ccr */
mov.b r1h,r1l
@ -94,6 +96,7 @@
mov.l @sp+,er1
add.l #(LRET-LER1),sp /* remove LORIG - LRET */
mov.l sp,@SYMBOL_NAME(sw_ksp)
andc #0xef,ccr /* switch to user mode */
mov.l er0,sp
bra 8f
7:
@ -173,9 +176,6 @@ SYMBOL_NAME_LABEL(interrupt_entry)
SYMBOL_NAME_LABEL(system_call)
subs #4,sp /* dummy LVEC */
SAVE_ALL
mov.w @(LCCR:16,sp),r1
bset #4,r1l
ldc r1l,ccr /* restore ccr */
mov.l er0,er4
mov.l #-ENOSYS,er0
mov.l er0,@(LER0:16,sp)
@ -198,6 +198,7 @@ SYMBOL_NAME_LABEL(system_call)
mov.l @(LER1:16,sp),er0
mov.l @(LER2:16,sp),er1
mov.l @(LER3:16,sp),er2
andc #0x7f,ccr
jsr @er4
mov.l er0,@(LER0:16,sp) /* save the return value */
#if defined(CONFIG_SYSCALL_PRINT)

1
include/asm-h8300/irq.h
View file

@ -61,6 +61,5 @@ static __inline__ int irq_canonicalize(int irq)
extern void enable_irq(unsigned int);
extern void disable_irq(unsigned int);
#define disable_irq_nosync(x) disable_irq(x)
#endif /* _H8300_IRQ_H_ */

1
include/asm-h8300/irq_regs.h Normal file
View file

@ -0,0 +1 @@
#include <asm-generic/irq_regs.h>

1
include/asm-h8300/pgtable.h
View file

@ -73,4 +73,5 @@ extern int is_in_rom(unsigned long);
#define VMALLOC_START 0
#define VMALLOC_END 0xffffffff
#define arch_enter_lazy_cpu_mode() do {} while (0)
#endif /* _H8300_PGTABLE_H */