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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
144 lines
2.9 KiB
C
144 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2000-2002
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* (C) Copyright 2004, Psyent Corporation <www.psyent.com>
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* Scott McNutt <smcnutt@psyent.com>
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*/
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#include <common.h>
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#include <command.h>
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#include <irq_func.h>
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#include <asm/nios2.h>
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#include <asm/types.h>
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#include <asm/io.h>
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#include <asm/ptrace.h>
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/*************************************************************************/
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struct irq_action {
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interrupt_handler_t *handler;
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void *arg;
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int count;
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};
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static struct irq_action vecs[32];
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int disable_interrupts(void)
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{
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int val = rdctl (CTL_STATUS);
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wrctl (CTL_STATUS, val & ~STATUS_IE);
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return (val & STATUS_IE);
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}
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void enable_interrupts( void )
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{
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int val = rdctl (CTL_STATUS);
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wrctl (CTL_STATUS, val | STATUS_IE);
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}
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void external_interrupt(struct pt_regs *regs)
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{
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unsigned irqs;
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struct irq_action *act;
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/* Evaluate only irqs that are both enabled AND pending */
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irqs = rdctl (CTL_IENABLE) & rdctl (CTL_IPENDING);
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act = vecs;
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/* Assume (as does the Nios2 HAL) that bit 0 is highest
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* priority. NOTE: There is ALWAYS a handler assigned
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* (the default if no other).
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*/
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while (irqs) {
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if (irqs & 1) {
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act->handler (act->arg);
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act->count++;
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}
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irqs >>=1;
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act++;
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}
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}
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static void def_hdlr (void *arg)
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{
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unsigned irqs = rdctl (CTL_IENABLE);
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/* Disable the individual interrupt -- with gratuitous
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* warning.
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*/
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irqs &= ~(1 << (int)arg);
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wrctl (CTL_IENABLE, irqs);
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printf ("WARNING: Disabling unhandled interrupt: %d\n",
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(int)arg);
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}
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/*************************************************************************/
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void irq_install_handler(int irq, interrupt_handler_t *hdlr, void *arg)
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{
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int flag;
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struct irq_action *act;
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unsigned ena = rdctl (CTL_IENABLE);
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if ((irq < 0) || (irq > 31))
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return;
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act = &vecs[irq];
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flag = disable_interrupts();
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if (hdlr) {
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act->handler = hdlr;
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act->arg = arg;
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ena |= (1 << irq); /* enable */
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} else {
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act->handler = def_hdlr;
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act->arg = (void *)irq;
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ena &= ~(1 << irq); /* disable */
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}
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wrctl (CTL_IENABLE, ena);
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if (flag) enable_interrupts();
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}
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int interrupt_init(void)
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{
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int i;
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/* Assign the default handler to all */
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for (i = 0; i < 32; i++) {
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vecs[i].handler = def_hdlr;
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vecs[i].arg = (void *)i;
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vecs[i].count = 0;
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}
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enable_interrupts();
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return (0);
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}
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/*************************************************************************/
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#if defined(CONFIG_CMD_IRQ)
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int do_irqinfo(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
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{
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int i;
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struct irq_action *act = vecs;
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printf ("\nInterrupt-Information:\n\n");
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printf ("Nr Routine Arg Count\n");
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printf ("-----------------------------\n");
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for (i=0; i<32; i++) {
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if (act->handler != def_hdlr) {
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printf ("%02d %08lx %08lx %d\n",
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i,
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(ulong)act->handler,
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(ulong)act->arg,
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act->count);
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}
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act++;
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}
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printf ("\n");
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return (0);
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}
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#endif
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