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git.ipfire.org Git - people/ms/u-boot.git/blob - arch/powerpc/cpu/ppc4xx/interrupts.c
2 * (C) Copyright 2000-2002
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * (C) Copyright 2002 (440 port)
6 * Scott McNutt, Artesyn Communication Producs, smcnutt@artsyncp.com
8 * (C) Copyright 2003 (440GX port)
9 * Travis B. Sawyer, Sandburst Corporation, tsawyer@sandburst.com
11 * (C) Copyright 2008 (PPC440X05 port for Virtex 5 FX)
12 * Ricardo Ribalda-Universidad Autonoma de Madrid-ricardo.ribalda@uam.es
13 * Work supported by Qtechnology (htpp://qtec.com)
15 * SPDX-License-Identifier: GPL-2.0+
21 #include <asm/processor.h>
22 #include <asm/interrupt.h>
23 #include <asm/ppc4xx.h>
24 #include <ppc_asm.tmpl>
27 DECLARE_GLOBAL_DATA_PTR
;
30 * CPM interrupt vector functions.
33 interrupt_handler_t
*handler
;
37 static struct irq_action irq_vecs
[IRQ_MAX
];
39 #if defined(CONFIG_440)
41 /* SPRN changed in 440 */
42 static __inline__
void set_evpr(unsigned long val
)
44 asm volatile("mtspr 0x03f,%0" : : "r" (val
));
47 #else /* !defined(CONFIG_440) */
49 static __inline__
void set_pit(unsigned long val
)
51 asm volatile("mtpit %0" : : "r" (val
));
54 static __inline__
void set_evpr(unsigned long val
)
56 asm volatile("mtevpr %0" : : "r" (val
));
58 #endif /* defined(CONFIG_440 */
60 int interrupt_init_cpu (unsigned *decrementer_count
)
65 /* decrementer is automatically reloaded */
66 *decrementer_count
= 0;
69 * Mark all irqs as free
71 for (vec
= 0; vec
< IRQ_MAX
; vec
++) {
72 irq_vecs
[vec
].handler
= NULL
;
73 irq_vecs
[vec
].arg
= NULL
;
74 irq_vecs
[vec
].count
= 0;
81 #if defined(CONFIG_440)
82 val
= mfspr( SPRN_TCR
);
83 val
&= (~0x04400000); /* clear DIS & ARE */
84 mtspr( SPRN_TCR
, val
);
85 mtspr( SPRN_DEC
, 0 ); /* Prevent exception after TSR clear*/
86 mtspr( SPRN_DECAR
, 0 ); /* clear reload */
87 mtspr( SPRN_TSR
, 0x08000000 ); /* clear DEC status */
88 val
= gd
->bd
->bi_intfreq
/1000; /* 1 msec */
89 mtspr( SPRN_DECAR
, val
); /* Set auto-reload value */
90 mtspr( SPRN_DEC
, val
); /* Set inital val */
92 set_pit(gd
->bd
->bi_intfreq
/ 1000);
94 #endif /* CONFIG_4xx */
106 val
= mfspr(SPRN_TCR
);
108 mtspr(SPRN_TCR
, val
);
113 set_evpr(0x00000000);
116 * Call uic or xilinx_irq pic_enable
123 void timer_interrupt_cpu(struct pt_regs
*regs
)
125 /* nothing to do here */
129 void interrupt_run_handler(int vec
)
131 irq_vecs
[vec
].count
++;
133 if (irq_vecs
[vec
].handler
!= NULL
) {
135 (*irq_vecs
[vec
].handler
) (irq_vecs
[vec
].arg
);
137 pic_irq_disable(vec
);
138 printf("Masking bogus interrupt vector %d\n", vec
);
145 void irq_install_handler(int vec
, interrupt_handler_t
* handler
, void *arg
)
148 * Print warning when replacing with a different irq vector
150 if ((irq_vecs
[vec
].handler
!= NULL
) && (irq_vecs
[vec
].handler
!= handler
)) {
151 printf("Interrupt vector %d: handler 0x%x replacing 0x%x\n",
152 vec
, (uint
) handler
, (uint
) irq_vecs
[vec
].handler
);
154 irq_vecs
[vec
].handler
= handler
;
155 irq_vecs
[vec
].arg
= arg
;
161 void irq_free_handler(int vec
)
163 debug("Free interrupt for vector %d ==> %p\n",
164 vec
, irq_vecs
[vec
].handler
);
166 pic_irq_disable(vec
);
168 irq_vecs
[vec
].handler
= NULL
;
169 irq_vecs
[vec
].arg
= NULL
;
173 #if defined(CONFIG_CMD_IRQ)
174 int do_irqinfo(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
178 printf ("Interrupt-Information:\n");
179 printf ("Nr Routine Arg Count\n");
181 for (vec
= 0; vec
< IRQ_MAX
; vec
++) {
182 if (irq_vecs
[vec
].handler
!= NULL
) {
183 printf ("%02d %08lx %08lx %d\n",
185 (ulong
)irq_vecs
[vec
].handler
,
186 (ulong
)irq_vecs
[vec
].arg
,
187 irq_vecs
[vec
].count
);