+++ /dev/null
-/*
- * (C) Copyright 2000-2002
- * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- *
- * Hacked for MPC8260 by Murray.Jensen@cmst.csiro.au, 22-Oct-00
- */
-
-#include <common.h>
-#include <command.h>
-#include <mpc8260.h>
-#include <mpc8260_irq.h>
-#include <asm/processor.h>
-
-DECLARE_GLOBAL_DATA_PTR;
-
-/****************************************************************************/
-
-struct irq_action {
- interrupt_handler_t *handler;
- void *arg;
- ulong count;
-};
-
-static struct irq_action irq_handlers[NR_IRQS];
-
-static ulong ppc_cached_irq_mask[NR_MASK_WORDS];
-
-/****************************************************************************/
-/* this section was ripped out of arch/ppc/kernel/ppc8260_pic.c in the */
-/* Linux/PPC 2.4.x source. There was no copyright notice in that file. */
-
-/* The 8260 internal interrupt controller. It is usually
- * the only interrupt controller.
- * There are two 32-bit registers (high/low) for up to 64
- * possible interrupts.
- *
- * Now, the fun starts.....Interrupt Numbers DO NOT MAP
- * in a simple arithmetic fashion to mask or pending registers.
- * That is, interrupt 4 does not map to bit position 4.
- * We create two tables, indexed by vector number, to indicate
- * which register to use and which bit in the register to use.
- */
-static u_char irq_to_siureg[] = {
- 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0
-};
-
-static u_char irq_to_siubit[] = {
- 31, 16, 17, 18, 19, 20, 21, 22,
- 23, 24, 25, 26, 27, 28, 29, 30,
- 29, 30, 16, 17, 18, 19, 20, 21,
- 22, 23, 24, 25, 26, 27, 28, 31,
- 0, 1, 2, 3, 4, 5, 6, 7,
- 8, 9, 10, 11, 12, 13, 14, 15,
- 15, 14, 13, 12, 11, 10, 9, 8,
- 7, 6, 5, 4, 3, 2, 1, 0
-};
-
-static void m8260_mask_irq (unsigned int irq_nr)
-{
- volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
- int bit, word;
- volatile uint *simr;
-
- bit = irq_to_siubit[irq_nr];
- word = irq_to_siureg[irq_nr];
-
- simr = &(immr->im_intctl.ic_simrh);
- ppc_cached_irq_mask[word] &= ~(1 << (31 - bit));
- simr[word] = ppc_cached_irq_mask[word];
-}
-
-static void m8260_unmask_irq (unsigned int irq_nr)
-{
- volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
- int bit, word;
- volatile uint *simr;
-
- bit = irq_to_siubit[irq_nr];
- word = irq_to_siureg[irq_nr];
-
- simr = &(immr->im_intctl.ic_simrh);
- ppc_cached_irq_mask[word] |= (1 << (31 - bit));
- simr[word] = ppc_cached_irq_mask[word];
-}
-
-static void m8260_mask_and_ack (unsigned int irq_nr)
-{
- volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
- int bit, word;
- volatile uint *simr, *sipnr;
-
- bit = irq_to_siubit[irq_nr];
- word = irq_to_siureg[irq_nr];
-
- simr = &(immr->im_intctl.ic_simrh);
- sipnr = &(immr->im_intctl.ic_sipnrh);
- ppc_cached_irq_mask[word] &= ~(1 << (31 - bit));
- simr[word] = ppc_cached_irq_mask[word];
- sipnr[word] = 1 << (31 - bit);
-}
-
-static int m8260_get_irq (struct pt_regs *regs)
-{
- volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
- int irq;
- unsigned long bits;
-
- /* For MPC8260, read the SIVEC register and shift the bits down
- * to get the irq number. */
- bits = immr->im_intctl.ic_sivec;
- irq = bits >> 26;
- return irq;
-}
-
-/* end of code ripped out of arch/ppc/kernel/ppc8260_pic.c */
-/****************************************************************************/
-
-int interrupt_init_cpu (unsigned *decrementer_count)
-{
- volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
-
- *decrementer_count = (gd->bus_clk / 4) / CONFIG_SYS_HZ;
-
- /* Initialize the default interrupt mapping priorities */
- immr->im_intctl.ic_sicr = 0;
- immr->im_intctl.ic_siprr = 0x05309770;
- immr->im_intctl.ic_scprrh = 0x05309770;
- immr->im_intctl.ic_scprrl = 0x05309770;
-
- /* disable all interrupts and clear all pending bits */
- immr->im_intctl.ic_simrh = ppc_cached_irq_mask[0] = 0;
- immr->im_intctl.ic_simrl = ppc_cached_irq_mask[1] = 0;
- immr->im_intctl.ic_sipnrh = 0xffffffff;
- immr->im_intctl.ic_sipnrl = 0xffffffff;
-
-#ifdef CONFIG_HYMOD
- /*
- * ensure all external interrupt sources default to trigger on
- * high-to-low transition (i.e. edge triggered active low)
- */
- immr->im_intctl.ic_siexr = -1;
-#endif
-
- return (0);
-}
-
-/****************************************************************************/
-
-/*
- * Handle external interrupts
- */
-void external_interrupt (struct pt_regs *regs)
-{
- int irq, unmask = 1;
-
- irq = m8260_get_irq (regs);
-
- m8260_mask_and_ack (irq);
-
- enable_interrupts ();
-
- if (irq_handlers[irq].handler != NULL)
- (*irq_handlers[irq].handler) (irq_handlers[irq].arg);
- else {
- printf ("\nBogus External Interrupt IRQ %d\n", irq);
- /*
- * turn off the bogus interrupt, otherwise it
- * might repeat forever
- */
- unmask = 0;
- }
-
- if (unmask)
- m8260_unmask_irq (irq);
-}
-
-/****************************************************************************/
-
-/*
- * Install and free an interrupt handler.
- */
-
-void
-irq_install_handler (int irq, interrupt_handler_t * handler, void *arg)
-{
- if (irq < 0 || irq >= NR_IRQS) {
- printf ("irq_install_handler: bad irq number %d\n", irq);
- return;
- }
-
- if (irq_handlers[irq].handler != NULL)
- printf ("irq_install_handler: 0x%08lx replacing 0x%08lx\n",
- (ulong) handler, (ulong) irq_handlers[irq].handler);
-
- irq_handlers[irq].handler = handler;
- irq_handlers[irq].arg = arg;
-
- m8260_unmask_irq (irq);
-}
-
-void irq_free_handler (int irq)
-{
- if (irq < 0 || irq >= NR_IRQS) {
- printf ("irq_free_handler: bad irq number %d\n", irq);
- return;
- }
-
- m8260_mask_irq (irq);
-
- irq_handlers[irq].handler = NULL;
- irq_handlers[irq].arg = NULL;
-}
-
-/****************************************************************************/
-
-void timer_interrupt_cpu (struct pt_regs *regs)
-{
- /* nothing to do here */
- return;
-}
-
-/****************************************************************************/
-
-#if defined(CONFIG_CMD_IRQ)
-
-/* ripped this out of ppc4xx/interrupts.c */
-
-/*******************************************************************************
-*
-* irqinfo - print information about PCI devices
-*
-*/
-void
-do_irqinfo (cmd_tbl_t * cmdtp, bd_t * bd, int flag, int argc, char *argv[])
-{
- int irq, re_enable;
-
- re_enable = disable_interrupts ();
-
- puts ("\nInterrupt-Information:\n"
- "Nr Routine Arg Count\n");
-
- for (irq = 0; irq < 32; irq++)
- if (irq_handlers[irq].handler != NULL)
- printf ("%02d %08lx %08lx %ld\n", irq,
- (ulong) irq_handlers[irq].handler,
- (ulong) irq_handlers[irq].arg,
- irq_handlers[irq].count);
-
- if (re_enable)
- enable_interrupts ();
-}
-
-#endif
projects / u-boot / blobdiff