1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2007 Michal Simek
4 * (C) Copyright 2004 Atmark Techno, Inc.
6 * Michal SIMEK <monstr@monstr.eu>
7 * Yasushi SHOJI <yashi@atmark-techno.com>
16 #include <asm/microblaze_intc.h>
19 DECLARE_GLOBAL_DATA_PTR;
21 void enable_interrupts(void)
23 debug("Enable interrupts for the whole CPU\n");
27 int disable_interrupts(void)
33 return (msr & 0x2) != 0;
36 static struct irq_action *vecs;
39 /* mapping structure to interrupt controller */
40 microblaze_intc_t *intc;
43 static void def_hdlr(void)
48 static void enable_one_interrupt(int irq)
55 intc->ier = (mask | offset);
57 debug("Enable one interrupt irq %x - mask %x,ier %x\n", offset, mask,
59 debug("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
60 intc->iar, intc->mer);
63 static void disable_one_interrupt(int irq)
70 intc->ier = (mask & ~offset);
72 debug("Disable one interrupt irq %x - mask %x,ier %x\n", irq, mask,
74 debug("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
75 intc->iar, intc->mer);
78 int install_interrupt_handler(int irq, interrupt_handler_t *hdlr, void *arg)
80 struct irq_action *act;
82 /* irq out of range */
83 if ((irq < 0) || (irq > irq_no)) {
84 puts("IRQ out of range\n");
88 if (hdlr) { /* enable */
92 enable_one_interrupt(irq);
97 act->handler = (interrupt_handler_t *)def_hdlr;
98 act->arg = (void *)irq;
99 disable_one_interrupt(irq);
103 /* initialization interrupt controller - hardware */
104 static void intc_init(void)
108 intc->iar = 0xFFFFFFFF;
109 /* XIntc_Start - hw_interrupt enable and all interrupt enable */
112 debug("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
113 intc->iar, intc->mer);
116 int interrupt_init(void)
119 const void *blob = gd->fdt_blob;
122 debug("INTC: Initialization\n");
124 node = fdt_node_offset_by_compatible(blob, node,
125 "xlnx,xps-intc-1.00.a");
127 fdt_addr_t base = fdtdec_get_addr(blob, node, "reg");
128 if (base == FDT_ADDR_T_NONE)
131 debug("INTC: Base addr %lx\n", base);
132 intc = (microblaze_intc_t *)base;
133 irq_no = fdtdec_get_int(blob, node, "xlnx,num-intr-inputs", 0);
134 debug("INTC: IRQ NO %x\n", irq_no);
140 vecs = calloc(1, sizeof(struct irq_action) * irq_no);
142 puts("Interrupt vector allocation failed\n");
146 /* initialize irq list */
147 for (i = 0; i < irq_no; i++) {
148 vecs[i].handler = (interrupt_handler_t *)def_hdlr;
149 vecs[i].arg = (void *)i;
152 /* initialize intc controller */
156 puts("Undefined interrupt controller\n");
161 void interrupt_handler(void)
163 int irqs = intc->ivr; /* find active interrupt */
166 struct irq_action *act = vecs + irqs;
168 debug("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
169 intc->iar, intc->mer);
173 debug("Interrupt handler on %x line, r14 %x\n", irqs, value);
175 debug("Jumping to interrupt handler rutine addr %x,count %x,arg %x\n",
176 (u32)act->handler, act->count, (u32)act->arg);
177 act->handler(act->arg);
180 intc->iar = mask << irqs;
182 debug("Dump INTC reg, isr %x, ier %x, iar %x, mer %x\n", intc->isr,
183 intc->ier, intc->iar, intc->mer);
187 debug("Interrupt handler on %x line, r14 %x\n", irqs, value);
190 #if defined(CONFIG_CMD_IRQ)
191 int do_irqinfo(struct cmd_tbl *cmdtp, int flag, int argc, const char *argv[])
194 struct irq_action *act = vecs;
197 puts("\nInterrupt-Information:\n\n"
198 "Nr Routine Arg Count\n"
199 "-----------------------------\n");
201 for (i = 0; i < irq_no; i++) {
202 if (act->handler != (interrupt_handler_t *)def_hdlr) {
203 printf("%02d %08x %08x %d\n", i,
204 (int)act->handler, (int)act->arg,
211 puts("Undefined interrupt controller\n");