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https://github.com/u-boot/u-boot.git
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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>
158 lines
3.4 KiB
C
158 lines
3.4 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 <command.h>
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#include <irq_func.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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if (CONFIG_IS_ENABLED(I8259_PIC))
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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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if (CONFIG_IS_ENABLED(I8259_PIC))
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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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if (CONFIG_IS_ENABLED(I8259_PIC))
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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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if (CONFIG_IS_ENABLED(I8259_PIC)) {
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unmask_irq(irq);
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specific_eoi(irq);
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}
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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(struct cmd_tbl *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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struct idt_ptr ptr;
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int irq;
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interrupt_read_idt(&ptr);
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printf("IDT at %lx, size %x\n", ptr.address, ptr.size);
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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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