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-rw-r--r--arch/h8300/kernel/Makefile6
-rw-r--r--arch/h8300/kernel/irq.c211
-rw-r--r--arch/h8300/kernel/setup.c3
-rw-r--r--arch/h8300/kernel/time.c2
4 files changed, 214 insertions, 8 deletions
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 @@
4 4
5extra-y := vmlinux.lds 5extra-y := vmlinux.lds
6 6
7obj-y := process.o traps.o ptrace.o ints.o \ 7obj-y := process.o traps.o ptrace.o irq.o \
8 sys_h8300.o time.o semaphore.o signal.o \ 8 sys_h8300.o time.o semaphore.o signal.o \
9 setup.o gpio.o init_task.o syscalls.o devres.o 9 setup.o gpio.o init_task.o syscalls.o
10
11devres-y = ../../../kernel/irq/devres.o
12 10
13obj-$(CONFIG_MODULES) += module.o h8300_ksyms.o 11obj-$(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 @@
1/*
2 * linux/arch/h8300/kernel/irq.c
3 *
4 * Copyright 2007 Yoshinori Sato <ysato@users.sourceforge.jp>
5 */
6
7#include <linux/module.h>
8#include <linux/types.h>
9#include <linux/kernel.h>
10#include <linux/sched.h>
11#include <linux/kernel_stat.h>
12#include <linux/seq_file.h>
13#include <linux/init.h>
14#include <linux/random.h>
15#include <linux/bootmem.h>
16#include <linux/irq.h>
17
18#include <asm/system.h>
19#include <asm/traps.h>
20#include <asm/io.h>
21#include <asm/setup.h>
22#include <asm/errno.h>
23
24/*#define DEBUG*/
25
26extern unsigned long *interrupt_redirect_table;
27extern const int h8300_saved_vectors[];
28extern const unsigned long h8300_trap_table[];
29int h8300_enable_irq_pin(unsigned int irq);
30void h8300_disable_irq_pin(unsigned int irq);
31
32#define CPU_VECTOR ((unsigned long *)0x000000)
33#define ADDR_MASK (0xffffff)
34
35static inline int is_ext_irq(unsigned int irq)
36{
37 return (irq >= EXT_IRQ0 && irq <= (EXT_IRQ0 + EXT_IRQS));
38}
39
40static void h8300_enable_irq(unsigned int irq)
41{
42 if (is_ext_irq(irq))
43 IER_REGS |= 1 << (irq - EXT_IRQ0);
44}
45
46static void h8300_disable_irq(unsigned int irq)
47{
48 if (is_ext_irq(irq))
49 IER_REGS &= ~(1 << (irq - EXT_IRQ0));
50}
51
52static void h8300_end_irq(unsigned int irq)
53{
54}
55
56static unsigned int h8300_startup_irq(unsigned int irq)
57{
58 if (is_ext_irq(irq))
59 return h8300_enable_irq_pin(irq);
60 else
61 return 0;
62}
63
64static void h8300_shutdown_irq(unsigned int irq)
65{
66 if (is_ext_irq(irq))
67 h8300_disable_irq_pin(irq);
68}
69
70/*
71 * h8300 interrupt controler implementation
72 */
73struct irq_chip h8300irq_chip = {
74 .name = "H8300-INTC",
75 .startup = h8300_startup_irq,
76 .shutdown = h8300_shutdown_irq,
77 .enable = h8300_enable_irq,
78 .disable = h8300_disable_irq,
79 .ack = NULL,
80 .end = h8300_end_irq,
81};
82
83void ack_bad_irq(unsigned int irq)
84{
85 printk("unexpected IRQ trap at vector %02x\n", irq);
86}
87
88#if defined(CONFIG_RAMKERNEL)
89static unsigned long __init *get_vector_address(void)
90{
91 unsigned long *rom_vector = CPU_VECTOR;
92 unsigned long base,tmp;
93 int vec_no;
94
95 base = rom_vector[EXT_IRQ0] & ADDR_MASK;
96
97 /* check romvector format */
98 for (vec_no = EXT_IRQ1; vec_no <= EXT_IRQ0+EXT_IRQS; vec_no++) {
99 if ((base+(vec_no - EXT_IRQ0)*4) != (rom_vector[vec_no] & ADDR_MASK))
100 return NULL;
101 }
102
103 /* ramvector base address */
104 base -= EXT_IRQ0*4;
105
106 /* writerble check */
107 tmp = ~(*(volatile unsigned long *)base);
108 (*(volatile unsigned long *)base) = tmp;
109 if ((*(volatile unsigned long *)base) != tmp)
110 return NULL;
111 return (unsigned long *)base;
112}
113
114static void __init setup_vector(void)
115{
116 int i;
117 unsigned long *ramvec,*ramvec_p;
118 const unsigned long *trap_entry;
119 const int *saved_vector;
120
121 ramvec = get_vector_address();
122 if (ramvec == NULL)
123 panic("interrupt vector serup failed.");
124 else
125 printk(KERN_INFO "virtual vector at 0x%08lx\n",(unsigned long)ramvec);
126
127 /* create redirect table */
128 ramvec_p = ramvec;
129 trap_entry = h8300_trap_table;
130 saved_vector = h8300_saved_vectors;
131 for ( i = 0; i < NR_IRQS; i++) {
132 if (i == *saved_vector) {
133 ramvec_p++;
134 saved_vector++;
135 } else {
136 if ( i < NR_TRAPS ) {
137 if (*trap_entry)
138 *ramvec_p = VECTOR(*trap_entry);
139 ramvec_p++;
140 trap_entry++;
141 } else
142 *ramvec_p++ = REDIRECT(interrupt_entry);
143 }
144 }
145 interrupt_redirect_table = ramvec;
146#ifdef DEBUG
147 ramvec_p = ramvec;
148 for (i = 0; i < NR_IRQS; i++) {
149 if ((i % 8) == 0)
150 printk(KERN_DEBUG "\n%p: ",ramvec_p);
151 printk(KERN_DEBUG "%p ",*ramvec_p);
152 ramvec_p++;
153 }
154 printk(KERN_DEBUG "\n");
155#endif
156}
157#else
158#define setup_vector() do { } while(0)
159#endif
160
161void __init init_IRQ(void)
162{
163 int c;
164
165 setup_vector();
166
167 for (c = 0; c < NR_IRQS; c++) {
168 irq_desc[c].status = IRQ_DISABLED;
169 irq_desc[c].action = NULL;
170 irq_desc[c].depth = 1;
171 irq_desc[c].chip = &h8300irq_chip;
172 }
173}
174
175asmlinkage void do_IRQ(int irq)
176{
177 irq_enter();
178 __do_IRQ(irq);
179 irq_exit();
180}
181
182#if defined(CONFIG_PROC_FS)
183int show_interrupts(struct seq_file *p, void *v)
184{
185 int i = *(loff_t *) v, j;
186 struct irqaction * action;
187 unsigned long flags;
188
189 if (i == 0)
190 seq_puts(p, " CPU0");
191
192 if (i < NR_IRQS) {
193 spin_lock_irqsave(&irq_desc[i].lock, flags);
194 action = irq_desc[i].action;
195 if (!action)
196 goto unlock;
197 seq_printf(p, "%3d: ",i);
198 seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
199 seq_printf(p, " %14s", irq_desc[i].chip->name);
200 seq_printf(p, "-%-8s", irq_desc[i].name);
201 seq_printf(p, " %s", action->name);
202
203 for (action=action->next; action; action = action->next)
204 seq_printf(p, ", %s", action->name);
205 seq_putc(p, '\n');
206unlock:
207 spin_unlock_irqrestore(&irq_desc[i].lock, flags);
208 }
209 return 0;
210}
211#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 @@
33 33
34#include <asm/setup.h> 34#include <asm/setup.h>
35#include <asm/irq.h> 35#include <asm/irq.h>
36
37#ifdef CONFIG_BLK_DEV_INITRD
38#include <asm/pgtable.h> 36#include <asm/pgtable.h>
39#endif
40 37
41#if defined(__H8300H__) 38#if defined(__H8300H__)
42#define CPU "H8/300H" 39#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)
44#ifndef CONFIG_SMP 44#ifndef CONFIG_SMP
45 update_process_times(user_mode(regs)); 45 update_process_times(user_mode(regs));
46#endif 46#endif
47 profile_tick(CPU_PROFILING, regs); 47 profile_tick(CPU_PROFILING);
48} 48}
49 49
50void time_init(void) 50void time_init(void)