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Diffstat (limited to 'arch/cris/arch-v10/kernel/irq.c')
-rw-r--r--arch/cris/arch-v10/kernel/irq.c76
1 files changed, 43 insertions, 33 deletions
diff --git a/arch/cris/arch-v10/kernel/irq.c b/arch/cris/arch-v10/kernel/irq.c
index b2f16d6fc871..4b368a122015 100644
--- a/arch/cris/arch-v10/kernel/irq.c
+++ b/arch/cris/arch-v10/kernel/irq.c
@@ -1,4 +1,4 @@
1/* $Id: irq.c,v 1.2 2004/06/09 05:30:27 starvik Exp $ 1/* $Id: irq.c,v 1.4 2005/01/04 12:22:28 starvik Exp $
2 * 2 *
3 * linux/arch/cris/kernel/irq.c 3 * linux/arch/cris/kernel/irq.c
4 * 4 *
@@ -12,11 +12,13 @@
12 */ 12 */
13 13
14#include <asm/irq.h> 14#include <asm/irq.h>
15#include <linux/irq.h>
15#include <linux/kernel.h> 16#include <linux/kernel.h>
16#include <linux/init.h> 17#include <linux/init.h>
17#include <linux/config.h> 18#include <linux/config.h>
18 19
19irqvectptr irq_shortcuts[NR_IRQS]; /* vector of shortcut jumps after the irq prologue */ 20#define mask_irq(irq_nr) (*R_VECT_MASK_CLR = 1 << (irq_nr));
21#define unmask_irq(irq_nr) (*R_VECT_MASK_SET = 1 << (irq_nr));
20 22
21/* don't use set_int_vector, it bypasses the linux interrupt handlers. it is 23/* don't use set_int_vector, it bypasses the linux interrupt handlers. it is
22 * global just so that the kernel gdb can use it. 24 * global just so that the kernel gdb can use it.
@@ -102,41 +104,52 @@ static void (*interrupt[NR_IRQS])(void) = {
102 IRQ31_interrupt 104 IRQ31_interrupt
103}; 105};
104 106
105static void (*bad_interrupt[NR_IRQS])(void) = { 107static void enable_crisv10_irq(unsigned int irq);
106 NULL, NULL, 108
107 NULL, bad_IRQ3_interrupt, 109static unsigned int startup_crisv10_irq(unsigned int irq)
108 bad_IRQ4_interrupt, bad_IRQ5_interrupt, 110{
109 bad_IRQ6_interrupt, bad_IRQ7_interrupt, 111 enable_crisv10_irq(irq);
110 bad_IRQ8_interrupt, bad_IRQ9_interrupt, 112 return 0;
111 bad_IRQ10_interrupt, bad_IRQ11_interrupt, 113}
112 bad_IRQ12_interrupt, bad_IRQ13_interrupt, 114
113 NULL, NULL, 115#define shutdown_crisv10_irq disable_crisv10_irq
114 bad_IRQ16_interrupt, bad_IRQ17_interrupt,
115 bad_IRQ18_interrupt, bad_IRQ19_interrupt,
116 bad_IRQ20_interrupt, bad_IRQ21_interrupt,
117 bad_IRQ22_interrupt, bad_IRQ23_interrupt,
118 bad_IRQ24_interrupt, bad_IRQ25_interrupt,
119 NULL, NULL, NULL, NULL, NULL,
120 bad_IRQ31_interrupt
121};
122 116
123void arch_setup_irq(int irq) 117static void enable_crisv10_irq(unsigned int irq)
124{ 118{
125 set_int_vector(irq, interrupt[irq]); 119 unmask_irq(irq);
126} 120}
127 121
128void arch_free_irq(int irq) 122static void disable_crisv10_irq(unsigned int irq)
129{ 123{
130 set_int_vector(irq, bad_interrupt[irq]); 124 mask_irq(irq);
131} 125}
132 126
127static void ack_crisv10_irq(unsigned int irq)
128{
129}
130
131static void end_crisv10_irq(unsigned int irq)
132{
133}
134
135static struct hw_interrupt_type crisv10_irq_type = {
136 .typename = "CRISv10",
137 .startup = startup_crisv10_irq,
138 .shutdown = shutdown_crisv10_irq,
139 .enable = enable_crisv10_irq,
140 .disable = disable_crisv10_irq,
141 .ack = ack_crisv10_irq,
142 .end = end_crisv10_irq,
143 .set_affinity = NULL
144};
145
133void weird_irq(void); 146void weird_irq(void);
134void system_call(void); /* from entry.S */ 147void system_call(void); /* from entry.S */
135void do_sigtrap(void); /* from entry.S */ 148void do_sigtrap(void); /* from entry.S */
136void gdb_handle_breakpoint(void); /* from entry.S */ 149void gdb_handle_breakpoint(void); /* from entry.S */
137 150
138/* init_IRQ() is called by start_kernel and is responsible for fixing IRQ masks and 151/* init_IRQ() is called by start_kernel and is responsible for fixing IRQ masks and
139 setting the irq vector table to point to bad_interrupt ptrs. 152 setting the irq vector table.
140*/ 153*/
141 154
142void __init 155void __init
@@ -154,14 +167,15 @@ init_IRQ(void)
154 167
155 *R_VECT_MASK_CLR = 0xffffffff; 168 *R_VECT_MASK_CLR = 0xffffffff;
156 169
157 /* clear the shortcut entry points */
158
159 for(i = 0; i < NR_IRQS; i++)
160 irq_shortcuts[i] = NULL;
161
162 for (i = 0; i < 256; i++) 170 for (i = 0; i < 256; i++)
163 etrax_irv->v[i] = weird_irq; 171 etrax_irv->v[i] = weird_irq;
164 172
173 /* Initialize IRQ handler descriptiors. */
174 for(i = 2; i < NR_IRQS; i++) {
175 irq_desc[i].handler = &crisv10_irq_type;
176 set_int_vector(i, interrupt[i]);
177 }
178
165 /* the entries in the break vector contain actual code to be 179 /* the entries in the break vector contain actual code to be
166 executed by the associated break handler, rather than just a jump 180 executed by the associated break handler, rather than just a jump
167 address. therefore we need to setup a default breakpoint handler 181 address. therefore we need to setup a default breakpoint handler
@@ -170,10 +184,6 @@ init_IRQ(void)
170 for (i = 0; i < 16; i++) 184 for (i = 0; i < 16; i++)
171 set_break_vector(i, do_sigtrap); 185 set_break_vector(i, do_sigtrap);
172 186
173 /* set all etrax irq's to the bad handlers */
174 for (i = 2; i < NR_IRQS; i++)
175 set_int_vector(i, bad_interrupt[i]);
176
177 /* except IRQ 15 which is the multiple-IRQ handler on Etrax100 */ 187 /* except IRQ 15 which is the multiple-IRQ handler on Etrax100 */
178 188
179 set_int_vector(15, multiple_interrupt); 189 set_int_vector(15, multiple_interrupt);