mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-05 02:36:39 +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>
150 lines
3.1 KiB
C
150 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2009
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* Graeme Russ, <graeme.russ@gmail.com>
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*
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* (C) Copyright 2007
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* Daniel Hellstrom, Gaisler Research, <daniel@gaisler.com>
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*
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* (C) Copyright 2006
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* Detlev Zundel, DENX Software Engineering, <dzu@denx.de>
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*
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* (C) Copyright -2003
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* Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
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*
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* (C) Copyright 2002
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* Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
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*
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* (C) Copyright 2001
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* Josh Huber, Mission Critical Linux, Inc, <huber@mclx.com>
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*/
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/*
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* This file contains the high-level API for the interrupt sub-system
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* of the x86 port of U-Boot. Most of the functionality has been
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* shamelessly stolen from the leon2 / leon3 ports of U-Boot.
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* Daniel Hellstrom, Detlev Zundel, Wolfgang Denk and Josh Huber are
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* credited for the corresponding work on those ports. The original
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* interrupt handling routines for the x86 port were written by
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* Daniel Engström
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*/
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#include <common.h>
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#include <asm/interrupt.h>
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#if !CONFIG_IS_ENABLED(X86_64)
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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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unsigned int count;
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};
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static struct irq_action irq_handlers[SYS_NUM_IRQS] = { {0} };
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static int spurious_irq_cnt;
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static int spurious_irq;
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void irq_install_handler(int irq, interrupt_handler_t *handler, void *arg)
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{
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int status;
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if (irq < 0 || irq >= SYS_NUM_IRQS) {
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printf("irq_install_handler: bad irq number %d\n", irq);
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return;
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}
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if (irq_handlers[irq].handler != NULL)
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printf("irq_install_handler: 0x%08lx replacing 0x%08lx\n",
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(ulong) handler,
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(ulong) irq_handlers[irq].handler);
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status = disable_interrupts();
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irq_handlers[irq].handler = handler;
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irq_handlers[irq].arg = arg;
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irq_handlers[irq].count = 0;
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unmask_irq(irq);
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if (status)
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enable_interrupts();
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return;
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}
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void irq_free_handler(int irq)
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{
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int status;
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if (irq < 0 || irq >= SYS_NUM_IRQS) {
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printf("irq_free_handler: bad irq number %d\n", irq);
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return;
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}
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status = disable_interrupts();
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mask_irq(irq);
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irq_handlers[irq].handler = NULL;
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irq_handlers[irq].arg = NULL;
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if (status)
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enable_interrupts();
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return;
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}
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void do_irq(int hw_irq)
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{
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int irq = hw_irq - 0x20;
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if (irq < 0 || irq >= SYS_NUM_IRQS) {
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printf("do_irq: bad irq number %d\n", irq);
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return;
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}
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if (irq_handlers[irq].handler) {
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mask_irq(irq);
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irq_handlers[irq].handler(irq_handlers[irq].arg);
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irq_handlers[irq].count++;
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unmask_irq(irq);
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specific_eoi(irq);
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} else {
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if ((irq & 7) != 7) {
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spurious_irq_cnt++;
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spurious_irq = irq;
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}
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}
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}
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#endif
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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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#if !CONFIG_IS_ENABLED(X86_64)
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int irq;
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printf("Spurious IRQ: %u, last unknown IRQ: %d\n",
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spurious_irq_cnt, spurious_irq);
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printf("Interrupt-Information:\n");
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printf("Nr Routine Arg Count\n");
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for (irq = 0; irq < SYS_NUM_IRQS; irq++) {
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if (irq_handlers[irq].handler != NULL) {
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printf("%02d %08lx %08lx %d\n",
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irq,
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(ulong)irq_handlers[irq].handler,
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(ulong)irq_handlers[irq].arg,
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irq_handlers[irq].count);
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}
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}
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#endif
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return 0;
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}
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#endif
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