LXR uboot/arch/sparc/lib/interrupts.c

   1/*
   2 * (C) Copyright 2000-2002
   3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4 *
   5 * (C) Copyright 2003
   6 * Gleb Natapov <gnatapov@mrv.com>
   7 *
   8 * (C) Copyright 2007
   9 * Daniel Hellstrom, Gaisler Research, daniel@gaisler.com.
  10 *
  11 * SPDX-License-Identifier:     GPL-2.0+
  12 */
  13
  14#include <common.h>
  15#include <asm/processor.h>
  16#include <asm/irq.h>
  17
  18/* Implemented by SPARC CPUs */
  19extern int interrupt_init_cpu(void);
  20extern void timer_interrupt_cpu(void *arg);
  21extern int timer_interrupt_init_cpu(void);
  22
  23int intLock(void)
  24{
  25        unsigned int pil;
  26
  27        pil = get_pil();
  28
  29        /* set PIL to 15 ==> no pending interrupts will interrupt CPU */
  30        set_pil(15);
  31
  32        return pil;
  33}
  34
  35void intUnlock(int oldLevel)
  36{
  37        set_pil(oldLevel);
  38}
  39
  40void enable_interrupts(void)
  41{
  42        set_pil(0);             /* enable all interrupts */
  43}
  44
  45int disable_interrupts(void)
  46{
  47        return intLock();
  48}
  49
  50int interrupt_is_enabled(void)
  51{
  52        if (get_pil() == 15)
  53                return 0;
  54        return 1;
  55}
  56
  57int interrupt_init(void)
  58{
  59        int ret;
  60
  61        /* call cpu specific function from $(CPU)/interrupts.c */
  62        ret = interrupt_init_cpu();
  63
  64        /* enable global interrupts */
  65        enable_interrupts();
  66
  67        return ret;
  68}
  69