]>
git.ipfire.org Git - people/ms/u-boot.git/blob - arch/sparc/cpu/leon3/interrupts.c
3 * Daniel Hellstrom, Gaisler Research, daniel@gaisler.com
6 * Detlev Zundel, DENX Software Engineering, dzu@denx.de
9 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
12 * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
14 * SPDX-License-Identifier: GPL-2.0+
17 #include <asm/stack.h>
20 #include <asm/processor.h>
26 #include <grlib/irqmp.h>
27 #include <grlib/gptimer.h>
29 /* 15 normal irqs and a non maskable interrupt */
33 interrupt_handler_t
*handler
;
38 extern ambapp_dev_irqmp
*irqmp
;
39 extern ambapp_dev_gptimer
*gptimer
;
41 static struct irq_action irq_handlers
[NR_IRQS
] = { {0}, };
42 static int spurious_irq_cnt
= 0;
43 static int spurious_irq
= 0;
45 static inline unsigned int irqmp_get_irqmask(unsigned int irq
)
47 if ((irq
< 0) || (irq
>= NR_IRQS
)) {
55 static void leon3_ic_disable(unsigned int irq
)
57 unsigned int mask
, pil
;
63 /* get mask of interrupt */
64 mask
= irqmp_get_irqmask(irq
);
67 irqmp
->cpu_mask
[0] = SPARC_NOCACHE_READ(&irqmp
->cpu_mask
[0]) & (~mask
);
72 static void leon3_ic_enable(unsigned int irq
)
74 unsigned int mask
, pil
;
80 /* get mask of interrupt */
81 mask
= irqmp_get_irqmask(irq
);
84 irqmp
->cpu_mask
[0] = SPARC_NOCACHE_READ(&irqmp
->cpu_mask
[0]) | mask
;
90 void handler_irq(int irq
, struct pt_regs
*regs
)
92 if (irq_handlers
[irq
].handler
) {
93 if (((unsigned int)irq_handlers
[irq
].handler
> CONFIG_SYS_RAM_END
) ||
94 ((unsigned int)irq_handlers
[irq
].handler
< CONFIG_SYS_RAM_BASE
)
96 printf("handler_irq: bad handler: %x, irq number %d\n",
97 (unsigned int)irq_handlers
[irq
].handler
, irq
);
100 irq_handlers
[irq
].handler(irq_handlers
[irq
].arg
);
101 irq_handlers
[irq
].count
++;
108 void leon3_force_int(int irq
)
110 if (!irqmp
|| (irq
>= NR_IRQS
) || (irq
< 0))
112 printf("Forcing interrupt %d\n", irq
);
114 irqmp
->iforce
= SPARC_NOCACHE_READ(&irqmp
->iforce
) | (1 << irq
);
117 /****************************************************************************/
119 int interrupt_init_cpu(void)
125 /****************************************************************************/
127 /* Handle Timer 0 IRQ */
128 void timer_interrupt_cpu(void *arg
)
130 gptimer
->e
[0].ctrl
= (GPTIMER_CTRL_EN
| GPTIMER_CTRL_RS
|
131 GPTIMER_CTRL_LD
| GPTIMER_CTRL_IE
);
132 /* nothing to do here */
136 /****************************************************************************/
139 * Install and free a interrupt handler.
142 void irq_install_handler(int irq
, interrupt_handler_t
* handler
, void *arg
)
144 if (irq
< 0 || irq
>= NR_IRQS
) {
145 printf("irq_install_handler: bad irq number %d\n", irq
);
149 if (irq_handlers
[irq
].handler
!= NULL
)
150 printf("irq_install_handler: 0x%08lx replacing 0x%08lx\n",
151 (ulong
) handler
, (ulong
) irq_handlers
[irq
].handler
);
153 if (((unsigned int)handler
> CONFIG_SYS_RAM_END
) ||
154 ((unsigned int)handler
< CONFIG_SYS_RAM_BASE
)
156 printf("irq_install_handler: bad handler: %x, irq number %d\n",
157 (unsigned int)handler
, irq
);
160 irq_handlers
[irq
].handler
= handler
;
161 irq_handlers
[irq
].arg
= arg
;
163 /* enable irq on IRQMP hardware */
164 leon3_ic_enable(irq
);
168 void irq_free_handler(int irq
)
170 if (irq
< 0 || irq
>= NR_IRQS
) {
171 printf("irq_free_handler: bad irq number %d\n", irq
);
175 /* disable irq on IRQMP hardware */
176 leon3_ic_disable(irq
);
178 irq_handlers
[irq
].handler
= NULL
;
179 irq_handlers
[irq
].arg
= NULL
;
182 /****************************************************************************/
184 #if defined(CONFIG_CMD_IRQ)
185 void do_irqinfo(cmd_tbl_t
* cmdtp
, bd_t
* bd
, int flag
, int argc
, char * const argv
[])
188 unsigned int pil
= get_pil();
189 printf("PIL level: %u\n\r", pil
);
190 printf("Spurious IRQ: %u, last unknown IRQ: %d\n",
191 spurious_irq_cnt
, spurious_irq
);
193 puts("\nInterrupt-Information:\n" "Nr Routine Arg Count\n");
195 for (irq
= 0; irq
< NR_IRQS
; irq
++) {
196 if (irq_handlers
[irq
].handler
!= NULL
) {
197 printf("%02d %p %p %d\n", irq
,
198 irq_handlers
[irq
].handler
,
199 irq_handlers
[irq
].arg
,
200 irq_handlers
[irq
].count
);