2 * (C) Copyright 2003 Josef Baumgartner <josef.baumgartner@telex.de>
4 * (C) Copyright 2000-2004
5 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
7 * See file CREDITS for list of people who contributed to this
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
28 #include <asm/processor.h>
31 #include <asm/m5272.h>
32 #include <asm/immap_5272.h>
36 #include <asm/m5282.h>
37 #include <asm/immap_5282.h>
44 * Interrupt vector functions.
46 struct interrupt_action {
47 interrupt_handler_t *handler;
51 static struct interrupt_action irq_vecs[NR_IRQS];
53 static __inline__ unsigned short get_sr (void)
57 asm volatile ("move.w %%sr,%0":"=r" (sr):);
62 static __inline__ void set_sr (unsigned short sr)
64 asm volatile ("move.w %0,%%sr"::"r" (sr));
67 /************************************************************************/
69 * Install and free an interrupt handler
71 void irq_install_handler (int vec, interrupt_handler_t * handler, void *arg)
74 volatile intctrl_t *intp = (intctrl_t *) (CFG_MBAR + MCFSIM_ICR1);
79 vec_base = intp->int_pivr & 0xe0;
82 if ((vec < vec_base) || (vec > vec_base + NR_IRQS)) {
83 printf ("irq_install_handler: wrong interrupt vector %d\n",
88 irq_vecs[vec - vec_base].handler = handler;
89 irq_vecs[vec - vec_base].arg = arg;
92 void irq_free_handler (int vec)
95 volatile intctrl_t *intp = (intctrl_t *) (CFG_MBAR + MCFSIM_ICR1);
100 vec_base = intp->int_pivr & 0xe0;
103 if ((vec < vec_base) || (vec > vec_base + NR_IRQS)) {
107 irq_vecs[vec - vec_base].handler = NULL;
108 irq_vecs[vec - vec_base].arg = NULL;
111 void enable_interrupts (void)
116 set_sr (sr & ~0x0700);
119 int disable_interrupts (void)
124 set_sr (sr | 0x0700);
126 return ((sr & 0x0700) == 0); /* return TRUE, if interrupts were enabled before */
129 void int_handler (struct pt_regs *fp)
132 volatile intctrl_t *intp = (intctrl_t *) (CFG_MBAR + MCFSIM_ICR1);
134 int vec, vec_base = 0;
136 vec = (fp->vector >> 2) & 0xff;
138 vec_base = intp->int_pivr & 0xe0;
141 if (irq_vecs[vec - vec_base].handler != NULL) {
143 vec_base].handler (irq_vecs[vec - vec_base].arg);
145 printf ("\nBogus External Interrupt Vector %ld\n", vec);
150 int interrupt_init (void)
152 volatile intctrl_t *intp = (intctrl_t *) (CFG_MBAR + MCFSIM_ICR1);
154 /* disable all external interrupts */
155 intp->int_icr1 = 0x88888888;
156 intp->int_icr2 = 0x88888888;
157 intp->int_icr3 = 0x88888888;
158 intp->int_icr4 = 0x88888888;
159 intp->int_pitr = 0x00000000;
160 /* initialize vector register */
161 intp->int_pivr = 0x40;
163 enable_interrupts ();
170 int interrupt_init (void)