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 * See file CREDITS for list of people who contributed to this
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License as
19 * published by the Free Software Foundation; either version 2 of
20 * the License, or (at your option) any later version.
22 * This program is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU General Public License for more details.
27 * You should have received a copy of the GNU General Public License
28 * along with this program; if not, write to the Free Software
29 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
33 #include <asm/stack.h>
36 #include <asm/processor.h>
42 /* 15 normal irqs and a non maskable interrupt */
46 interrupt_handler_t *handler;
51 static struct irq_action irq_handlers[NR_IRQS] = { {0}, };
52 static int spurious_irq_cnt = 0;
53 static int spurious_irq = 0;
55 static inline unsigned int leon2_get_irqmask(unsigned int irq)
57 if ((irq < 0) || (irq >= NR_IRQS)) {
64 static void leon2_ic_disable(unsigned int irq)
66 unsigned int mask, pil;
67 LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS;
71 /* get mask of interrupt */
72 mask = leon2_get_irqmask(irq);
75 leon2->Interrupt_Mask =
76 SPARC_NOCACHE_READ(&leon2->Interrupt_Mask) & (~mask);
81 static void leon2_ic_enable(unsigned int irq)
83 unsigned int mask, pil;
84 LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS;
88 /* get mask of interrupt */
89 mask = leon2_get_irqmask(irq);
92 leon2->Interrupt_Mask =
93 SPARC_NOCACHE_READ(&leon2->Interrupt_Mask) | mask;
98 void handler_irq(int irq, struct pt_regs *regs)
100 if (irq_handlers[irq].handler) {
101 if (((unsigned int)irq_handlers[irq].handler > CONFIG_SYS_RAM_END) ||
102 ((unsigned int)irq_handlers[irq].handler < CONFIG_SYS_RAM_BASE)
104 printf("handler_irq: bad handler: %x, irq number %d\n",
105 (unsigned int)irq_handlers[irq].handler, irq);
108 irq_handlers[irq].handler(irq_handlers[irq].arg);
109 irq_handlers[irq].count++;
116 void leon2_force_int(int irq)
118 LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS;
120 if ((irq >= NR_IRQS) || (irq < 0))
122 printf("Forcing interrupt %d\n", irq);
124 leon2->Interrupt_Force =
125 SPARC_NOCACHE_READ(&leon2->Interrupt_Force) | (1 << irq);
128 /****************************************************************************/
130 int interrupt_init_cpu(void)
135 /****************************************************************************/
137 /* Handle Timer 0 IRQ */
138 void timer_interrupt_cpu(void *arg)
140 LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS;
142 leon2->Timer_Control_1 =
143 (LEON2_TIMER_CTRL_EN | LEON2_TIMER_CTRL_RS | LEON2_TIMER_CTRL_LD);
145 /* nothing to do here */
149 /****************************************************************************/
152 * Install and free a interrupt handler.
155 void irq_install_handler(int irq, interrupt_handler_t * handler, void *arg)
157 if (irq < 0 || irq >= NR_IRQS) {
158 printf("irq_install_handler: bad irq number %d\n", irq);
162 if (irq_handlers[irq].handler != NULL)
163 printf("irq_install_handler: 0x%08lx replacing 0x%08lx\n",
164 (ulong) handler, (ulong) irq_handlers[irq].handler);
166 if (((unsigned int)handler > CONFIG_SYS_RAM_END) ||
167 ((unsigned int)handler < CONFIG_SYS_RAM_BASE)
169 printf("irq_install_handler: bad handler: %x, irq number %d\n",
170 (unsigned int)handler, irq);
173 irq_handlers[irq].handler = handler;
174 irq_handlers[irq].arg = arg;
176 /* enable irq on LEON2 hardware */
177 leon2_ic_enable(irq);
181 void irq_free_handler(int irq)
183 if (irq < 0 || irq >= NR_IRQS) {
184 printf("irq_free_handler: bad irq number %d\n", irq);
188 /* disable irq on LEON2 hardware */
189 leon2_ic_disable(irq);
191 irq_handlers[irq].handler = NULL;
192 irq_handlers[irq].arg = NULL;
195 /****************************************************************************/
197 #if defined(CONFIG_CMD_IRQ)
198 void do_irqinfo(cmd_tbl_t * cmdtp, bd_t * bd, int flag, int argc, char * const argv[])
201 unsigned int pil = get_pil();
202 printf("PIL level: %u\n\r", pil);
203 printf("Spurious IRQ: %u, last unknown IRQ: %d\n",
204 spurious_irq_cnt, spurious_irq);
206 puts("\nInterrupt-Information:\n" "Nr Routine Arg Count\n");
208 for (irq = 0; irq < NR_IRQS; irq++) {
209 if (irq_handlers[irq].handler != NULL) {
210 printf("%02d %08lx %08lx %ld\n", irq,
211 (unsigned int)irq_handlers[irq].handler,
212 (unsigned int)irq_handlers[irq].arg,
213 irq_handlers[irq].count);