mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-13 06:36:16 +09:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. 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 <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 (cmd_tbl_t *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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