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>
15 #include <asm/microblaze_intc.h>
18 DECLARE_GLOBAL_DATA_PTR;
20 void enable_interrupts(void)
22 debug("Enable interrupts for the whole CPU\n");
26 int disable_interrupts(void)
32 return (msr & 0x2) != 0;
35 static struct irq_action *vecs;
38 /* mapping structure to interrupt controller */
39 microblaze_intc_t *intc;
42 static void def_hdlr(void)
47 static void enable_one_interrupt(int irq)
54 intc->ier = (mask | offset);
56 debug("Enable one interrupt irq %x - mask %x,ier %x\n", offset, mask,
58 debug("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
59 intc->iar, intc->mer);
62 static void disable_one_interrupt(int irq)
69 intc->ier = (mask & ~offset);
71 debug("Disable one interrupt irq %x - mask %x,ier %x\n", irq, mask,
73 debug("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
74 intc->iar, intc->mer);
77 int install_interrupt_handler(int irq, interrupt_handler_t *hdlr, void *arg)
79 struct irq_action *act;
81 /* irq out of range */
82 if ((irq < 0) || (irq > irq_no)) {
83 puts("IRQ out of range\n");
87 if (hdlr) { /* enable */
91 enable_one_interrupt(irq);
96 act->handler = (interrupt_handler_t *)def_hdlr;
97 act->arg = (void *)irq;
98 disable_one_interrupt(irq);
102 /* initialization interrupt controller - hardware */
103 static void intc_init(void)
107 intc->iar = 0xFFFFFFFF;
108 /* XIntc_Start - hw_interrupt enable and all interrupt enable */
111 debug("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
112 intc->iar, intc->mer);
115 int interrupt_init(void)
118 const void *blob = gd->fdt_blob;
121 debug("INTC: Initialization\n");
123 node = fdt_node_offset_by_compatible(blob, node,
124 "xlnx,xps-intc-1.00.a");
126 fdt_addr_t base = fdtdec_get_addr(blob, node, "reg");
127 if (base == FDT_ADDR_T_NONE)
130 debug("INTC: Base addr %lx\n", base);
131 intc = (microblaze_intc_t *)base;
132 irq_no = fdtdec_get_int(blob, node, "xlnx,num-intr-inputs", 0);
133 debug("INTC: IRQ NO %x\n", irq_no);
139 vecs = calloc(1, sizeof(struct irq_action) * irq_no);
141 puts("Interrupt vector allocation failed\n");
145 /* initialize irq list */
146 for (i = 0; i < irq_no; i++) {
147 vecs[i].handler = (interrupt_handler_t *)def_hdlr;
148 vecs[i].arg = (void *)i;
151 /* initialize intc controller */
155 puts("Undefined interrupt controller\n");
160 void interrupt_handler(void)
162 int irqs = intc->ivr; /* find active interrupt */
165 struct irq_action *act = vecs + irqs;
167 debug("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
168 intc->iar, intc->mer);
172 debug("Interrupt handler on %x line, r14 %x\n", irqs, value);
174 debug("Jumping to interrupt handler rutine addr %x,count %x,arg %x\n",
175 (u32)act->handler, act->count, (u32)act->arg);
176 act->handler(act->arg);
179 intc->iar = mask << irqs;
181 debug("Dump INTC reg, isr %x, ier %x, iar %x, mer %x\n", intc->isr,
182 intc->ier, intc->iar, intc->mer);
186 debug("Interrupt handler on %x line, r14 %x\n", irqs, value);
189 #if defined(CONFIG_CMD_IRQ)
190 int do_irqinfo(cmd_tbl_t *cmdtp, int flag, int argc, const char *argv[])
193 struct irq_action *act = vecs;
196 puts("\nInterrupt-Information:\n\n"
197 "Nr Routine Arg Count\n"
198 "-----------------------------\n");
200 for (i = 0; i < irq_no; i++) {
201 if (act->handler != (interrupt_handler_t *)def_hdlr) {
202 printf("%02d %08x %08x %d\n", i,
203 (int)act->handler, (int)act->arg,
210 puts("Undefined interrupt controller\n");