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@@ -1,484 +0,0 @@
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-/*
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- * File: arch/blackfin/mach-common/ints-priority-dc.c
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- * Based on:
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- * Author:
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- *
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- * Created: ?
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- * Description: Set up the interrupt priorities
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- *
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- * Modified:
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- * 1996 Roman Zippel
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- * 1999 D. Jeff Dionne <jeff@uclinux.org>
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- * 2000-2001 Lineo, Inc. D. Jefff Dionne <jeff@lineo.ca>
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- * 2002 Arcturus Networks Inc. MaTed <mated@sympatico.ca>
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- * 2003 Metrowerks/Motorola
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- * 2003 Bas Vermeulen <bas@buyways.nl>
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- * Copyright 2004-2006 Analog Devices Inc.
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- *
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- * Bugs: Enter bugs at http://blackfin.uclinux.org/
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation; either version 2 of the License, or
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- * (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, see the file COPYING, or write
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- * to the Free Software Foundation, Inc.,
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- * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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- */
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-
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-#include <linux/module.h>
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-#include <linux/kernel_stat.h>
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-#include <linux/seq_file.h>
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-#include <linux/irq.h>
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-#ifdef CONFIG_KGDB
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-#include <linux/kgdb.h>
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-#endif
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-#include <asm/traps.h>
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-#include <asm/blackfin.h>
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-#include <asm/gpio.h>
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-#include <asm/irq_handler.h>
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-
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-/*
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- * NOTES:
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- * - we have separated the physical Hardware interrupt from the
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- * levels that the LINUX kernel sees (see the description in irq.h)
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- * -
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- */
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-
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-/* Initialize this to an actual value to force it into the .data
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- * section so that we know it is properly initialized at entry into
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- * the kernel but before bss is initialized to zero (which is where
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- * it would live otherwise). The 0x1f magic represents the IRQs we
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- * cannot actually mask out in hardware.
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- */
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-unsigned long irq_flags = 0x1f;
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-
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-/* The number of spurious interrupts */
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-atomic_t num_spurious;
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-
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-struct ivgx {
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- /* irq number for request_irq, available in mach-bf561/irq.h */
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- int irqno;
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- /* corresponding bit in the SICA_ISR0 register */
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- int isrflag0;
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- /* corresponding bit in the SICA_ISR1 register */
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- int isrflag1;
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-} ivg_table[NR_PERI_INTS];
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-
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-struct ivg_slice {
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- /* position of first irq in ivg_table for given ivg */
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- struct ivgx *ifirst;
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- struct ivgx *istop;
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-} ivg7_13[IVG13 - IVG7 + 1];
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-
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-static void search_IAR(void);
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-
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-/*
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- * Search SIC_IAR and fill tables with the irqvalues
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- * and their positions in the SIC_ISR register.
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- */
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-static void __init search_IAR(void)
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-{
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- unsigned ivg, irq_pos = 0;
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- for (ivg = 0; ivg <= IVG13 - IVG7; ivg++) {
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- int irqn;
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-
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- ivg7_13[ivg].istop = ivg7_13[ivg].ifirst = &ivg_table[irq_pos];
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-
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- for (irqn = 0; irqn < NR_PERI_INTS; irqn++) {
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- int iar_shift = (irqn & 7) * 4;
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- if (ivg ==
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- (0xf &
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- bfin_read32((unsigned long *)SICA_IAR0 +
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- (irqn >> 3)) >> iar_shift)) {
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- ivg_table[irq_pos].irqno = IVG7 + irqn;
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- ivg_table[irq_pos].isrflag0 =
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- (irqn < 32 ? (1 << irqn) : 0);
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- ivg_table[irq_pos].isrflag1 =
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- (irqn < 32 ? 0 : (1 << (irqn - 32)));
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- ivg7_13[ivg].istop++;
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- irq_pos++;
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- }
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- }
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- }
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-}
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-
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-/*
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- * This is for BF561 internal IRQs
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- */
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-
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-static void ack_noop(unsigned int irq)
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-{
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- /* Dummy function. */
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-}
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-
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-static void bf561_core_mask_irq(unsigned int irq)
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-{
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- irq_flags &= ~(1 << irq);
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- if (!irqs_disabled())
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- local_irq_enable();
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-}
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-
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-static void bf561_core_unmask_irq(unsigned int irq)
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-{
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- irq_flags |= 1 << irq;
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- /*
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- * If interrupts are enabled, IMASK must contain the same value
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- * as irq_flags. Make sure that invariant holds. If interrupts
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- * are currently disabled we need not do anything; one of the
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- * callers will take care of setting IMASK to the proper value
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- * when reenabling interrupts.
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- * local_irq_enable just does "STI irq_flags", so it's exactly
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- * what we need.
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- */
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- if (!irqs_disabled())
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- local_irq_enable();
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- return;
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-}
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-
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-static void bf561_internal_mask_irq(unsigned int irq)
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-{
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- unsigned long irq_mask;
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- if ((irq - (IRQ_CORETMR + 1)) < 32) {
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- irq_mask = (1 << (irq - (IRQ_CORETMR + 1)));
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- bfin_write_SICA_IMASK0(bfin_read_SICA_IMASK0() & ~irq_mask);
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- } else {
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- irq_mask = (1 << (irq - (IRQ_CORETMR + 1) - 32));
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- bfin_write_SICA_IMASK1(bfin_read_SICA_IMASK1() & ~irq_mask);
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- }
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-}
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-
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-static void bf561_internal_unmask_irq(unsigned int irq)
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-{
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- unsigned long irq_mask;
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-
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- if ((irq - (IRQ_CORETMR + 1)) < 32) {
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- irq_mask = (1 << (irq - (IRQ_CORETMR + 1)));
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- bfin_write_SICA_IMASK0(bfin_read_SICA_IMASK0() | irq_mask);
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- } else {
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- irq_mask = (1 << (irq - (IRQ_CORETMR + 1) - 32));
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- bfin_write_SICA_IMASK1(bfin_read_SICA_IMASK1() | irq_mask);
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- }
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- SSYNC();
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-}
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-
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-static struct irq_chip bf561_core_irqchip = {
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- .ack = ack_noop,
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- .mask = bf561_core_mask_irq,
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- .unmask = bf561_core_unmask_irq,
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-};
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-
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-static struct irq_chip bf561_internal_irqchip = {
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- .ack = ack_noop,
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- .mask = bf561_internal_mask_irq,
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- .unmask = bf561_internal_unmask_irq,
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-};
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-
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-static unsigned short gpio_enabled[gpio_bank(MAX_BLACKFIN_GPIOS)];
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-static unsigned short gpio_edge_triggered[gpio_bank(MAX_BLACKFIN_GPIOS)];
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-
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-static void bf561_gpio_ack_irq(unsigned int irq)
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-{
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- u16 gpionr = irq - IRQ_PF0;
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-
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- if (gpio_edge_triggered[gpio_bank(gpionr)] & gpio_bit(gpionr)) {
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- set_gpio_data(gpionr, 0);
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- SSYNC();
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- }
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-}
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-
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-static void bf561_gpio_mask_ack_irq(unsigned int irq)
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-{
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- u16 gpionr = irq - IRQ_PF0;
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-
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- if (gpio_edge_triggered[gpio_bank(gpionr)] & gpio_bit(gpionr)) {
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- set_gpio_data(gpionr, 0);
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- SSYNC();
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- }
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-
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- set_gpio_maska(gpionr, 0);
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- SSYNC();
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-}
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-
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-static void bf561_gpio_mask_irq(unsigned int irq)
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-{
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- set_gpio_maska(irq - IRQ_PF0, 0);
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- SSYNC();
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-}
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-
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-static void bf561_gpio_unmask_irq(unsigned int irq)
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-{
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- set_gpio_maska(irq - IRQ_PF0, 1);
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- SSYNC();
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-}
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-
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-static unsigned int bf561_gpio_irq_startup(unsigned int irq)
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-{
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- unsigned int ret;
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- char buf[8];
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- u16 gpionr = irq - IRQ_PF0;
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-
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- if (!(gpio_enabled[gpio_bank(gpionr)] & gpio_bit(gpionr))) {
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- snprintf(buf, sizeof buf, "IRQ %d", irq);
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- ret = gpio_request(gpionr, buf);
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- if (ret)
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- return ret;
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-
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- }
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-
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- gpio_enabled[gpio_bank(gpionr)] |= gpio_bit(gpionr);
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- bf561_gpio_unmask_irq(irq);
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-
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- return ret;
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-
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-}
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-
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-static void bf561_gpio_irq_shutdown(unsigned int irq)
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-{
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- bf561_gpio_mask_irq(irq);
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- gpio_free(irq - IRQ_PF0);
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- gpio_enabled[gpio_bank(irq - IRQ_PF0)] &= ~gpio_bit(irq - IRQ_PF0);
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-}
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-
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-static int bf561_gpio_irq_type(unsigned int irq, unsigned int type)
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-{
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-
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- unsigned int ret;
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- char buf[8];
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- u16 gpionr = irq - IRQ_PF0;
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-
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-
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- if (type == IRQ_TYPE_PROBE) {
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- /* only probe unenabled GPIO interrupt lines */
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- if (gpio_enabled[gpio_bank(gpionr)] & gpio_bit(gpionr))
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- return 0;
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- type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
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-
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- }
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-
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- if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING |
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- IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) {
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-
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- if (!(gpio_enabled[gpio_bank(gpionr)] & gpio_bit(gpionr))) {
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- snprintf(buf, sizeof buf, "IRQ %d", irq);
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- ret = gpio_request(gpionr, buf);
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- if (ret)
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- return ret;
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-
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- }
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-
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- gpio_enabled[gpio_bank(gpionr)] |= gpio_bit(gpionr);
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- } else {
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- gpio_enabled[gpio_bank(gpionr)] &= ~gpio_bit(gpionr);
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- return 0;
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- }
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-
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-
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- set_gpio_dir(gpionr, 0);
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- set_gpio_inen(gpionr, 1);
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-
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-
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- if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) {
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- gpio_edge_triggered[gpio_bank(gpionr)] |= gpio_bit(gpionr);
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- set_gpio_edge(gpionr, 1);
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- } else {
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- set_gpio_edge(gpionr, 0);
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- gpio_edge_triggered[gpio_bank(gpionr)] &= ~gpio_bit(gpionr);
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- }
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-
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- if ((type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))
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- == (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))
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- set_gpio_both(gpionr, 1);
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- else
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- set_gpio_both(gpionr, 0);
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-
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- if ((type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW)))
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- set_gpio_polar(gpionr, 1); /* low or falling edge denoted by one */
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- else
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- set_gpio_polar(gpionr, 0); /* high or rising edge denoted by zero */
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-
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- SSYNC();
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-
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- if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))
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- set_irq_handler(irq, handle_edge_irq);
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- else
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- set_irq_handler(irq, handle_level_irq);
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-
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- return 0;
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-}
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-
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-static struct irq_chip bf561_gpio_irqchip = {
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- .ack = bf561_gpio_ack_irq,
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- .mask = bf561_gpio_mask_irq,
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- .mask_ack = bf561_gpio_mask_ack_irq,
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- .unmask = bf561_gpio_unmask_irq,
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- .set_type = bf561_gpio_irq_type,
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- .startup = bf561_gpio_irq_startup,
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- .shutdown = bf561_gpio_irq_shutdown
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-};
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-
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-static void bf561_demux_gpio_irq(unsigned int inta_irq,
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- struct irq_desc *intb_desc)
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-{
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- int irq, flag_d, mask;
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- u16 gpio;
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-
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- switch (inta_irq) {
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- case IRQ_PROG0_INTA:
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- irq = IRQ_PF0;
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- break;
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- case IRQ_PROG1_INTA:
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- irq = IRQ_PF16;
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- break;
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- case IRQ_PROG2_INTA:
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- irq = IRQ_PF32;
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- break;
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- default:
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- dump_stack();
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- return;
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- }
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-
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- gpio = irq - IRQ_PF0;
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-
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- flag_d = get_gpiop_data(gpio);
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- mask = flag_d & (gpio_enabled[gpio_bank(gpio)] &
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- get_gpiop_maska(gpio));
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-
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- do {
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- if (mask & 1) {
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- struct irq_desc *desc = irq_desc + irq;
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- desc->handle_irq(irq, desc);
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- }
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- irq++;
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- mask >>= 1;
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- } while (mask);
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-
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-
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-}
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-
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-void __init init_exception_vectors(void)
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-{
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- SSYNC();
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-
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- /* cannot program in software:
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- * evt0 - emulation (jtag)
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- * evt1 - reset
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- */
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- bfin_write_EVT2(evt_nmi);
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- bfin_write_EVT3(trap);
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- bfin_write_EVT5(evt_ivhw);
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- bfin_write_EVT6(evt_timer);
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- bfin_write_EVT7(evt_evt7);
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- bfin_write_EVT8(evt_evt8);
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- bfin_write_EVT9(evt_evt9);
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- bfin_write_EVT10(evt_evt10);
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- bfin_write_EVT11(evt_evt11);
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- bfin_write_EVT12(evt_evt12);
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- bfin_write_EVT13(evt_evt13);
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- bfin_write_EVT14(evt14_softirq);
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- bfin_write_EVT15(evt_system_call);
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- CSYNC();
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-}
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-
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-/*
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- * This function should be called during kernel startup to initialize
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- * the BFin IRQ handling routines.
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- */
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-int __init init_arch_irq(void)
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-{
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- int irq;
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- unsigned long ilat = 0;
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- /* Disable all the peripheral intrs - page 4-29 HW Ref manual */
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- bfin_write_SICA_IMASK0(SIC_UNMASK_ALL);
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- bfin_write_SICA_IMASK1(SIC_UNMASK_ALL);
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- SSYNC();
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-
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- bfin_write_SICA_IWR0(IWR_ENABLE_ALL);
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- bfin_write_SICA_IWR1(IWR_ENABLE_ALL);
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-
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- local_irq_disable();
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-
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- init_exception_buff();
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-
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- for (irq = 0; irq <= SYS_IRQS; irq++) {
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- if (irq <= IRQ_CORETMR)
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- set_irq_chip(irq, &bf561_core_irqchip);
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- else
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- set_irq_chip(irq, &bf561_internal_irqchip);
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-
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- if ((irq != IRQ_PROG0_INTA) &&
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- (irq != IRQ_PROG1_INTA) &&
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- (irq != IRQ_PROG2_INTA))
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- set_irq_handler(irq, handle_simple_irq);
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- else
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- set_irq_chained_handler(irq, bf561_demux_gpio_irq);
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- }
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-
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- for (irq = IRQ_PF0; irq <= IRQ_PF47; irq++) {
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- set_irq_chip(irq, &bf561_gpio_irqchip);
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- /* if configured as edge, then will be changed to do_edge_IRQ */
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- set_irq_handler(irq, handle_level_irq);
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|
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- }
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-
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- bfin_write_IMASK(0);
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- CSYNC();
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- ilat = bfin_read_ILAT();
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|
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- CSYNC();
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- bfin_write_ILAT(ilat);
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- CSYNC();
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|
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-
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|
|
- printk(KERN_INFO "Configuring Blackfin Priority Driven Interrupts\n");
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|
|
- /* IMASK=xxx is equivalent to STI xx or irq_flags=xx,
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|
|
- * local_irq_enable()
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|
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- */
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|
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- program_IAR();
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|
|
- /* Therefore it's better to setup IARs before interrupts enabled */
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|
|
- search_IAR();
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|
|
-
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|
|
- /* Enable interrupts IVG7-15 */
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|
|
- irq_flags = irq_flags | IMASK_IVG15 |
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|
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- IMASK_IVG14 | IMASK_IVG13 | IMASK_IVG12 | IMASK_IVG11 |
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|
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- IMASK_IVG10 | IMASK_IVG9 | IMASK_IVG8 | IMASK_IVG7 | IMASK_IVGHW;
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-
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- return 0;
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|
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-}
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|
|
-
|
|
|
-#ifdef CONFIG_DO_IRQ_L1
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|
|
-__attribute__((l1_text))
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|
|
-#endif
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|
|
-void do_irq(int vec, struct pt_regs *fp)
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|
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-{
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|
|
- if (vec == EVT_IVTMR_P) {
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|
|
- vec = IRQ_CORETMR;
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|
|
- } else {
|
|
|
- struct ivgx *ivg = ivg7_13[vec - IVG7].ifirst;
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|
|
- struct ivgx *ivg_stop = ivg7_13[vec - IVG7].istop;
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|
|
- unsigned long sic_status0, sic_status1;
|
|
|
-
|
|
|
- SSYNC();
|
|
|
- sic_status0 = bfin_read_SICA_IMASK0() & bfin_read_SICA_ISR0();
|
|
|
- sic_status1 = bfin_read_SICA_IMASK1() & bfin_read_SICA_ISR1();
|
|
|
-
|
|
|
- for (;; ivg++) {
|
|
|
- if (ivg >= ivg_stop) {
|
|
|
- atomic_inc(&num_spurious);
|
|
|
- return;
|
|
|
- } else if ((sic_status0 & ivg->isrflag0) ||
|
|
|
- (sic_status1 & ivg->isrflag1))
|
|
|
- break;
|
|
|
- }
|
|
|
- vec = ivg->irqno;
|
|
|
- }
|
|
|
- asm_do_IRQ(vec, fp);
|
|
|
-
|
|
|
-#ifdef CONFIG_KGDB
|
|
|
- kgdb_process_breakpoint();
|
|
|
-#endif
|
|
|
-}
|