Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 | /* * (C) Copyright 2003 Josef Baumgartner <josef.baumgartner@telex.de> * * (C) Copyright 2000-2004 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ #include <common.h> #include <watchdog.h> #include <asm/processor.h> #ifdef CONFIG_M5271 #include <asm/m5271.h> #include <asm/immap_5271.h> #endif #ifdef CONFIG_M5272 #include <asm/m5272.h> #include <asm/immap_5272.h> #endif #ifdef CONFIG_M5282 #include <asm/m5282.h> #include <asm/immap_5282.h> #endif #ifdef CONFIG_M5249 #include <asm/m5249.h> #endif #define NR_IRQS 31 /* * Interrupt vector functions. */ struct interrupt_action { interrupt_handler_t *handler; void *arg; }; static struct interrupt_action irq_vecs[NR_IRQS]; static __inline__ unsigned short get_sr (void) { unsigned short sr; asm volatile ("move.w %%sr,%0":"=r" (sr):); return sr; } static __inline__ void set_sr (unsigned short sr) { asm volatile ("move.w %0,%%sr"::"r" (sr)); } /************************************************************************/ /* * Install and free an interrupt handler */ void irq_install_handler (int vec, interrupt_handler_t * handler, void *arg) { #ifdef CONFIG_M5272 volatile intctrl_t *intp = (intctrl_t *) (CFG_MBAR + MCFSIM_ICR1); #endif int vec_base = 0; #ifdef CONFIG_M5272 vec_base = intp->int_pivr & 0xe0; #endif if ((vec < vec_base) || (vec > vec_base + NR_IRQS)) { printf ("irq_install_handler: wrong interrupt vector %d\n", vec); return; } irq_vecs[vec - vec_base].handler = handler; irq_vecs[vec - vec_base].arg = arg; } void irq_free_handler (int vec) { #ifdef CONFIG_M5272 volatile intctrl_t *intp = (intctrl_t *) (CFG_MBAR + MCFSIM_ICR1); #endif int vec_base = 0; #ifdef CONFIG_M5272 vec_base = intp->int_pivr & 0xe0; #endif if ((vec < vec_base) || (vec > vec_base + NR_IRQS)) { return; } irq_vecs[vec - vec_base].handler = NULL; irq_vecs[vec - vec_base].arg = NULL; } void enable_interrupts (void) { unsigned short sr; sr = get_sr (); set_sr (sr & ~0x0700); } int disable_interrupts (void) { unsigned short sr; sr = get_sr (); set_sr (sr | 0x0700); return ((sr & 0x0700) == 0); /* return TRUE, if interrupts were enabled before */ } void int_handler (struct pt_regs *fp) { #ifdef CONFIG_M5272 volatile intctrl_t *intp = (intctrl_t *) (CFG_MBAR + MCFSIM_ICR1); #endif int vec, vec_base = 0; vec = (fp->vector >> 2) & 0xff; #ifdef CONFIG_M5272 vec_base = intp->int_pivr & 0xe0; #endif if (irq_vecs[vec - vec_base].handler != NULL) { irq_vecs[vec - vec_base].handler (irq_vecs[vec - vec_base].arg); } else { printf ("\nBogus External Interrupt Vector %d\n", vec); } } #ifdef CONFIG_M5272 int interrupt_init (void) { volatile intctrl_t *intp = (intctrl_t *) (CFG_MBAR + MCFSIM_ICR1); /* disable all external interrupts */ intp->int_icr1 = 0x88888888; intp->int_icr2 = 0x88888888; intp->int_icr3 = 0x88888888; intp->int_icr4 = 0x88888888; intp->int_pitr = 0x00000000; /* initialize vector register */ intp->int_pivr = 0x40; enable_interrupts (); return 0; } #endif #if defined(CONFIG_M5282) || defined(CONFIG_M5271) int interrupt_init (void) { return 0; } #endif #ifdef CONFIG_M5249 int interrupt_init (void) { enable_interrupts (); return 0; } #endif |