h8300 generic irq

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>

15 files changed, 237 insertions, 108 deletions

diff --git a/arch/h8300/Kconfig b/arch/h8300/Kconfig
index 86f6ca36363f..618dbad696f6 100644
--- a/arch/h8300/Kconfig
+++ b/arch/h8300/Kconfig
@@ -49,6 +49,10 @@ config GENERIC_HWEIGHT
         bool
         default y
 
+config GENERIC_HARDIRQS
+        bool
+        default y
+
 config GENERIC_CALIBRATE_DELAY
         bool
         default y
diff --git a/arch/h8300/Makefile b/arch/h8300/Makefile
index 40b3f56f3666..b2d896a7e598 100644
--- a/arch/h8300/Makefile
+++ b/arch/h8300/Makefile
@@ -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/
diff --git a/arch/h8300/kernel/Makefile b/arch/h8300/kernel/Makefile
index 4edbc2ef6ca2..ccc1a7fbf94b 100644
--- a/arch/h8300/kernel/Makefile
+++ b/arch/h8300/kernel/Makefile
@@ -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 
diff --git a/arch/h8300/kernel/irq.c b/arch/h8300/kernel/irq.c
new file mode 100644
index 000000000000..43d21e93f41f
--- /dev/null
+++ b/arch/h8300/kernel/irq.c
@@ -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
diff --git a/arch/h8300/kernel/setup.c b/arch/h8300/kernel/setup.c
index 313cd8081044..b2e86d0255e6 100644
--- a/arch/h8300/kernel/setup.c
+++ b/arch/h8300/kernel/setup.c
@@ -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"
diff --git a/arch/h8300/kernel/time.c b/arch/h8300/kernel/time.c
index 91d3b56ddc68..330638220a2e 100644
--- a/arch/h8300/kernel/time.c
+++ b/arch/h8300/kernel/time.c
@@ -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)
diff --git a/arch/h8300/mm/kmap.c b/arch/h8300/mm/kmap.c
index 26ab17286a53..5c7af09ae8d1 100644
--- a/arch/h8300/mm/kmap.c
+++ b/arch/h8300/mm/kmap.c
@@ -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);
 }
 
 /*
diff --git a/arch/h8300/platform/h8300h/Makefile b/arch/h8300/platform/h8300h/Makefile
index 5d42c772f75a..b24ea08aa0a7 100644
--- a/arch/h8300/platform/h8300h/Makefile
+++ b/arch/h8300/platform/h8300h/Makefile
@@ -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
diff --git a/arch/h8300/platform/h8300h/entry.S b/arch/h8300/platform/h8300h/entry.S
index d2dea2432fb2..f86ac3b5d4de 100644
--- a/arch/h8300/platform/h8300h/entry.S
+++ b/arch/h8300/platform/h8300h/entry.S
@@ -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)
diff --git a/arch/h8300/platform/h8300h/generic/Makefile b/arch/h8300/platform/h8300h/generic/Makefile
index b6ea7688a616..32b964a9010e 100644
--- a/arch/h8300/platform/h8300h/generic/Makefile
+++ b/arch/h8300/platform/h8300h/generic/Makefile
@@ -2,5 +2,5 @@
 # Makefile for the linux kernel.
 #
 
+extra-y :=  crt0_$(MODEL).o
 obj-y := timer.o
-extra-y =  crt0_$(MODEL).o
diff --git a/arch/h8300/platform/h8300h/ints_h8300h.c b/arch/h8300/platform/h8300h/ints_h8300h.c
deleted file mode 100644
index f1777119b871..000000000000
--- a/arch/h8300/platform/h8300h/ints_h8300h.c
+++ /dev/null
@@ -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;
-        }
-}
diff --git a/arch/h8300/platform/h8s/entry.S b/arch/h8300/platform/h8s/entry.S
index aeb2e9faa9b2..f3d6b8e8f959 100644
--- a/arch/h8300/platform/h8s/entry.S
+++ b/arch/h8300/platform/h8s/entry.S
@@ -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)
diff --git a/include/asm-h8300/irq.h b/include/asm-h8300/irq.h
index 42a3ac424a9e..41be646c3514 100644
--- a/include/asm-h8300/irq.h
+++ b/include/asm-h8300/irq.h
@@ -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_ */
diff --git a/include/asm-h8300/irq_regs.h b/include/asm-h8300/irq_regs.h
new file mode 100644
index 000000000000..3dd9c0b70270
--- /dev/null
+++ b/include/asm-h8300/irq_regs.h
@@ -0,0 +1 @@
+#include <asm-generic/irq_regs.h>
diff --git a/include/asm-h8300/pgtable.h b/include/asm-h8300/pgtable.h
index 8b7c6857998b..ddd07f485dd8 100644
--- a/include/asm-h8300/pgtable.h
+++ b/include/asm-h8300/pgtable.h
@@ -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 */