105 lines
2.8 KiB
C
105 lines
2.8 KiB
C
/*
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* (C) Copyright 2001
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* Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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/*
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* interrupts.c - just enough support for the decrementer/timer
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*/
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#include <common.h>
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#include <mpc8xx.h>
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#include <mpc8xx_irq.h>
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#include <asm/processor.h>
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#include <commproc.h>
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#include <command.h>
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int interrupt_init_cpu (unsigned *decrementer_count)
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{
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debug("interrupt_init: GT main cause reg: %08x:%08x\n",
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GTREGREAD(LOW_INTERRUPT_CAUSE_REGISTER),
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GTREGREAD(HIGH_INTERRUPT_CAUSE_REGISTER));
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debug("interrupt_init: ethernet cause regs: %08x %08x %08x\n",
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GTREGREAD(ETHERNET0_INTERRUPT_CAUSE_REGISTER),
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GTREGREAD(ETHERNET1_INTERRUPT_CAUSE_REGISTER),
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GTREGREAD(ETHERNET2_INTERRUPT_CAUSE_REGISTER));
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debug("interrupt_init: ethernet mask regs: %08x %08x %08x\n",
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GTREGREAD(ETHERNET0_INTERRUPT_MASK_REGISTER),
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GTREGREAD(ETHERNET1_INTERRUPT_MASK_REGISTER),
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GTREGREAD(ETHERNET2_INTERRUPT_MASK_REGISTER));
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debug("interrupt_init: setting decrementer_count\n");
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*decrementer_count = get_tbclk() / CONFIG_SYS_HZ;
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return (0);
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}
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/****************************************************************************/
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/*
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* Handle external interrupts
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*/
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void
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external_interrupt(struct pt_regs *regs)
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{
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puts("external_interrupt (oops!)\n");
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}
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volatile ulong timestamp = 0;
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/*
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* timer_interrupt - gets called when the decrementer overflows,
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* with interrupts disabled.
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* Trivial implementation - no need to be really accurate.
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*/
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void
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timer_interrupt_cpu (struct pt_regs *regs)
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{
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/* nothing to do here */
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return;
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}
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/****************************************************************************/
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/*
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* Install and free a interrupt handler.
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*/
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void
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irq_install_handler(int vec, interrupt_handler_t *handler, void *arg)
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{
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}
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void
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irq_free_handler(int vec)
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{
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}
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/****************************************************************************/
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void
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do_irqinfo(cmd_tbl_t *cmdtp, bd_t *bd, int flag, int argc, char * const argv[])
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{
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puts("IRQ related functions are unimplemented currently.\n");
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}
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