LXR uboot/arch/powerpc/cpu/mpc86xx/interrupts.c

   1/*
   2 * (C) Copyright 2000-2002
   3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4 *
   5 * (C) Copyright 2002 (440 port)
   6 * Scott McNutt, Artesyn Communication Producs, smcnutt@artsyncp.com
   7 *
   8 * (C) Copyright 2003 Motorola Inc. (MPC85xx port)
   9 * Xianghua Xiao (X.Xiao@motorola.com)
  10 *
  11 * (C) Copyright 2004, 2007 Freescale Semiconductor. (MPC86xx Port)
  12 * Jeff Brown
  13 * Srikanth Srinivasan (srikanth.srinivasan@freescale.com)
  14 *
  15 * SPDX-License-Identifier:     GPL-2.0+
  16 */
  17
  18#include <common.h>
  19#include <mpc86xx.h>
  20#include <command.h>
  21#include <asm/processor.h>
  22#ifdef CONFIG_POST
  23#include <post.h>
  24#endif
  25
  26int interrupt_init_cpu(unsigned long *decrementer_count)
  27{
  28        volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
  29        volatile ccsr_pic_t *pic = &immr->im_pic;
  30
  31#ifdef CONFIG_POST
  32        /*
  33         * The POST word is stored in the PIC's TFRR register which gets
  34         * cleared when the PIC is reset.  Save it off so we can restore it
  35         * later.
  36         */
  37        ulong post_word = post_word_load();
  38#endif
  39
  40        pic->gcr = MPC86xx_PICGCR_RST;
  41        while (pic->gcr & MPC86xx_PICGCR_RST)
  42                ;
  43        pic->gcr = MPC86xx_PICGCR_MODE;
  44
  45        *decrementer_count = get_tbclk() / CONFIG_SYS_HZ;
  46        debug("interrupt init: tbclk() = %ld MHz, decrementer_count = %ld\n",
  47              (get_tbclk() / 1000000),
  48              *decrementer_count);
  49
  50#ifdef CONFIG_INTERRUPTS
  51
  52        pic->iivpr1 = 0x810001; /* 50220 enable mcm interrupts */
  53        debug("iivpr1@%p = %x\n", &pic->iivpr1, pic->iivpr1);
  54
  55        pic->iivpr2 = 0x810002; /* 50240 enable ddr interrupts */
  56        debug("iivpr2@%p = %x\n", &pic->iivpr2, pic->iivpr2);
  57
  58        pic->iivpr3 = 0x810003; /* 50260 enable lbc interrupts */
  59        debug("iivpr3@%p = %x\n", &pic->iivpr3, pic->iivpr3);
  60
  61#if defined(CONFIG_PCI1) || defined(CONFIG_PCIE1)
  62        pic->iivpr8 = 0x810008; /* enable pcie1 interrupts */
  63        debug("iivpr8@%p = %x\n", &pic->iivpr8, pic->iivpr8);
  64#endif
  65#if defined(CONFIG_PCI2) || defined(CONFIG_PCIE2)
  66        pic->iivpr9 = 0x810009; /* enable pcie2 interrupts */
  67        debug("iivpr9@%p = %x\n", &pic->iivpr9, pic->iivpr9);
  68#endif
  69
  70        pic->ctpr = 0;  /* 40080 clear current task priority register */
  71#endif
  72
  73#ifdef CONFIG_POST
  74        post_word_store(post_word);
  75#endif
  76
  77        return 0;
  78}
  79
  80/*
  81 * timer_interrupt - gets called when the decrementer overflows,
  82 * with interrupts disabled.
  83 * Trivial implementation - no need to be really accurate.
  84 */
  85void timer_interrupt_cpu(struct pt_regs *regs)
  86{
  87        /* nothing to do here */
  88}
  89
  90/*
  91 * Install and free a interrupt handler. Not implemented yet.
  92 */
  93void irq_install_handler(int vec, interrupt_handler_t *handler, void *arg)
  94{
  95}
  96
  97void irq_free_handler(int vec)
  98{
  99}
 100
 101/*
 102 * irqinfo - print information about PCI devices,not implemented.
 103 */
 104int do_irqinfo(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 105{
 106        return 0;
 107}
 108
 109/*
 110 * Handle external interrupts
 111 */
 112void external_interrupt(struct pt_regs *regs)
 113{
 114        puts("external_interrupt (oops!)\n");
 115}
 116