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@gmail.com
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>
26 DECLARE_GLOBAL_DATA_PTR;
29 * CPM interrupt vector functions.
32 interrupt_handler_t *handler;
36 static struct irq_action irq_vecs[IRQ_MAX];
38 #if defined(CONFIG_440)
40 /* SPRN changed in 440 */
41 static __inline__ void set_evpr(unsigned long val)
43 asm volatile("mtspr 0x03f,%0" : : "r" (val));
46 #else /* !defined(CONFIG_440) */
48 static __inline__ void set_pit(unsigned long val)
50 asm volatile("mtpit %0" : : "r" (val));
53 static __inline__ void set_evpr(unsigned long val)
55 asm volatile("mtevpr %0" : : "r" (val));
57 #endif /* defined(CONFIG_440 */
59 int interrupt_init_cpu (unsigned *decrementer_count)
64 /* decrementer is automatically reloaded */
65 *decrementer_count = 0;
68 * Mark all irqs as free
70 for (vec = 0; vec < IRQ_MAX; vec++) {
71 irq_vecs[vec].handler = NULL;
72 irq_vecs[vec].arg = NULL;
73 irq_vecs[vec].count = 0;
80 #if defined(CONFIG_440)
81 val = mfspr( SPRN_TCR );
82 val &= (~0x04400000); /* clear DIS & ARE */
83 mtspr( SPRN_TCR, val );
84 mtspr( SPRN_DEC, 0 ); /* Prevent exception after TSR clear*/
85 mtspr( SPRN_DECAR, 0 ); /* clear reload */
86 mtspr( SPRN_TSR, 0x08000000 ); /* clear DEC status */
87 val = gd->bd->bi_intfreq/1000; /* 1 msec */
88 mtspr( SPRN_DECAR, val ); /* Set auto-reload value */
89 mtspr( SPRN_DEC, val ); /* Set inital val */
91 set_pit(gd->bd->bi_intfreq / 1000);
93 #endif /* CONFIG_4xx */
105 val = mfspr(SPRN_TCR);
107 mtspr(SPRN_TCR, val);
112 set_evpr(0x00000000);
115 * Call uic or xilinx_irq pic_enable
122 void timer_interrupt_cpu(struct pt_regs *regs)
124 /* nothing to do here */
128 void interrupt_run_handler(int vec)
130 irq_vecs[vec].count++;
132 if (irq_vecs[vec].handler != NULL) {
134 (*irq_vecs[vec].handler) (irq_vecs[vec].arg);
136 pic_irq_disable(vec);
137 printf("Masking bogus interrupt vector %d\n", vec);
144 void irq_install_handler(int vec, interrupt_handler_t * handler, void *arg)
147 * Print warning when replacing with a different irq vector
149 if ((irq_vecs[vec].handler != NULL) && (irq_vecs[vec].handler != handler)) {
150 printf("Interrupt vector %d: handler 0x%x replacing 0x%x\n",
151 vec, (uint) handler, (uint) irq_vecs[vec].handler);
153 irq_vecs[vec].handler = handler;
154 irq_vecs[vec].arg = arg;
160 void irq_free_handler(int vec)
162 debug("Free interrupt for vector %d ==> %p\n",
163 vec, irq_vecs[vec].handler);
165 pic_irq_disable(vec);
167 irq_vecs[vec].handler = NULL;
168 irq_vecs[vec].arg = NULL;
172 #if defined(CONFIG_CMD_IRQ)
173 int do_irqinfo(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
177 printf ("Interrupt-Information:\n");
178 printf ("Nr Routine Arg Count\n");
180 for (vec = 0; vec < IRQ_MAX; vec++) {
181 if (irq_vecs[vec].handler != NULL) {
182 printf ("%02d %08lx %08lx %d\n",
184 (ulong)irq_vecs[vec].handler,
185 (ulong)irq_vecs[vec].arg,
186 irq_vecs[vec].count);