microblaze: Remove interrupt handler

The primary purpose for this code was timer. By converting it to
CONFIG_TIMER there is no code which uses this implementation that's why
remove it. If there is a need to handle interrupts this patch can be
reverted in future.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/5f2decc5a30a5678490ebde26d8c6f5a5f873cda.1654684731.git.michal.simek@amd.com

2 files changed, 1 insertions, 218 deletions

diff --git a/arch/microblaze/cpu/interrupts.c b/arch/microblaze/cpu/interrupts.c
index fe65f3728f..ac53208bda 100644
--- a/arch/microblaze/cpu/interrupts.c
+++ b/arch/microblaze/cpu/interrupts.c
@@ -8,17 +8,8 @@
  */
 
 #include <common.h>
-#include <command.h>
-#include <fdtdec.h>
-#include <irq_func.h>
-#include <log.h>
-#include <malloc.h>
-#include <asm/global_data.h>
-#include <asm/microblaze_intc.h>
 #include <asm/asm.h>
 
-DECLARE_GLOBAL_DATA_PTR;
-
 void enable_interrupts(void)
 {
 	debug("Enable interrupts for the whole CPU\n");
@@ -34,183 +25,12 @@ int disable_interrupts(void)
 	return (msr & 0x2) != 0;
 }
 
-static struct irq_action *vecs;
-static u32 irq_no;
-
-/* mapping structure to interrupt controller */
-microblaze_intc_t *intc;
-
-/* default handler */
-static void def_hdlr(void)
-{
-	puts("def_hdlr\n");
-}
-
-static void enable_one_interrupt(int irq)
-{
-	int mask;
-	int offset = 1;
-
-	offset <<= irq;
-	mask = intc->ier;
-	intc->ier = (mask | offset);
-
-	debug("Enable one interrupt irq %x - mask %x,ier %x\n", offset, mask,
-	      intc->ier);
-	debug("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
-	      intc->iar, intc->mer);
-}
-
-static void disable_one_interrupt(int irq)
-{
-	int mask;
-	int offset = 1;
-
-	offset <<= irq;
-	mask = intc->ier;
-	intc->ier = (mask & ~offset);
-
-	debug("Disable one interrupt irq %x - mask %x,ier %x\n", irq, mask,
-	      intc->ier);
-	debug("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
-	      intc->iar, intc->mer);
-}
-
-int install_interrupt_handler(int irq, interrupt_handler_t *hdlr, void *arg)
-{
-	struct irq_action *act;
-
-	/* irq out of range */
-	if ((irq < 0) || (irq > irq_no)) {
-		puts("IRQ out of range\n");
-		return -1;
-	}
-	act = &vecs[irq];
-	if (hdlr) {		/* enable */
-		act->handler = hdlr;
-		act->arg = arg;
-		act->count = 0;
-		enable_one_interrupt(irq);
-		return 0;
-	}
-
-	/* Disable */
-	act->handler = (interrupt_handler_t *)def_hdlr;
-	act->arg = (void *)irq;
-	disable_one_interrupt(irq);
-	return 1;
-}
-
-/* initialization interrupt controller - hardware */
-static void intc_init(void)
-{
-	intc->mer = 0;
-	intc->ier = 0;
-	intc->iar = 0xFFFFFFFF;
-	/* XIntc_Start - hw_interrupt enable and all interrupt enable */
-	intc->mer = 0x3;
-
-	debug("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
-	      intc->iar, intc->mer);
-}
-
 int interrupt_init(void)
 {
-	int i;
-	const void *blob = gd->fdt_blob;
-	int node = 0;
-
-	debug("INTC: Initialization\n");
-
-	node = fdt_node_offset_by_compatible(blob, node,
-				"xlnx,xps-intc-1.00.a");
-	if (node != -1) {
-		fdt_addr_t base = fdtdec_get_addr(blob, node, "reg");
-		if (base == FDT_ADDR_T_NONE)
-			return -1;
-
-		debug("INTC: Base addr %lx\n", base);
-		intc = (microblaze_intc_t *)base;
-		irq_no = fdtdec_get_int(blob, node, "xlnx,num-intr-inputs", 0);
-		debug("INTC: IRQ NO %x\n", irq_no);
-	} else {
-		return node;
-	}
-
-	if (irq_no) {
-		vecs = calloc(1, sizeof(struct irq_action) * irq_no);
-		if (vecs == NULL) {
-			puts("Interrupt vector allocation failed\n");
-			return -1;
-		}
-
-		/* initialize irq list */
-		for (i = 0; i < irq_no; i++) {
-			vecs[i].handler = (interrupt_handler_t *)def_hdlr;
-			vecs[i].arg = (void *)i;
-			vecs[i].count = 0;
-		}
-		/* initialize intc controller */
-		intc_init();
-		enable_interrupts();
-	} else {
-		puts("Undefined interrupt controller\n");
-	}
 	return 0;
 }
 
 void interrupt_handler(void)
 {
-	int irqs = intc->ivr;	/* find active interrupt */
-	int mask = 1;
-	int value;
-	struct irq_action *act = vecs + irqs;
-
-	debug("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
-	      intc->iar, intc->mer);
-#ifdef DEBUG
-	R14(value);
-#endif
-	debug("Interrupt handler on %x line, r14 %x\n", irqs, value);
-
-	debug("Jumping to interrupt handler rutine addr %x,count %x,arg %x\n",
-	      (u32)act->handler, act->count, (u32)act->arg);
-	act->handler(act->arg);
-	act->count++;
-
-	intc->iar = mask << irqs;
-
-	debug("Dump INTC reg, isr %x, ier %x, iar %x, mer %x\n", intc->isr,
-	      intc->ier, intc->iar, intc->mer);
-#ifdef DEBUG
-	R14(value);
-#endif
-	debug("Interrupt handler on %x line, r14 %x\n", irqs, value);
-}
-
-#if defined(CONFIG_CMD_IRQ)
-int do_irqinfo(struct cmd_tbl *cmdtp, int flag, int argc, const char *argv[])
-{
-	int i;
-	struct irq_action *act = vecs;
-
-	if (irq_no) {
-		puts("\nInterrupt-Information:\n\n"
-		      "Nr  Routine   Arg       Count\n"
-		      "-----------------------------\n");
-
-		for (i = 0; i < irq_no; i++) {
-			if (act->handler != (interrupt_handler_t *)def_hdlr) {
-				printf("%02d  %08x  %08x  %d\n", i,
-				       (int)act->handler, (int)act->arg,
-				       act->count);
-			}
-			act++;
-		}
-		puts("\n");
-	} else {
-		puts("Undefined interrupt controller\n");
-	}
-	return 0;
+	panic("Interrupt occurred\n");
 }
-#endif
diff --git a/arch/microblaze/include/asm/microblaze_intc.h b/arch/microblaze/include/asm/microblaze_intc.h
deleted file mode 100644
index a7e8715851..0000000000
--- a/arch/microblaze/include/asm/microblaze_intc.h
+++ /dev/null
@@ -1,37 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0+ */
-/*
- * (C) Copyright 2007 Michal Simek
- *
- * Michal  SIMEK <monstr@monstr.cz>
- */
-
-#include <irq_func.h>
-
-typedef volatile struct microblaze_intc_t {
-	int isr; /* interrupt status register */
-	int ipr; /* interrupt pending register */
-	int ier; /* interrupt enable register */
-	int iar; /* interrupt acknowledge register */
-	int sie; /* set interrupt enable bits */
-	int cie; /* clear interrupt enable bits */
-	int ivr; /* interrupt vector register */
-	int mer; /* master enable register */
-} microblaze_intc_t;
-
-struct irq_action {
-	interrupt_handler_t *handler; /* pointer to interrupt rutine */
-	void *arg;
-	int count; /* number of interrupt */
-};
-
-/**
- * Register and unregister interrupt handler rutines
- *
- * @param irq	IRQ number
- * @param hdlr	Interrupt handler rutine
- * @param arg	Pointer to argument which is passed to int. handler rutine
- * Return:	0 if registration pass, 1 if unregistration pass,
- *		or an error code < 0 otherwise
- */
-int install_interrupt_handler(int irq, interrupt_handler_t *hdlr,
-				       void *arg);