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- /*
- * (C) Copyright 2008
- * Ricado Ribalda-Universidad Autonoma de Madrid-ricardo.ribalda@gmail.com
- * This work has been supported by: QTechnology http://qtec.com/
- * Based on interrupts.c Wolfgang Denk-DENX Software Engineering-wd@denx.de
- * SPDX-License-Identifier: GPL-2.0+
- */
- #include <common.h>
- #include <watchdog.h>
- #include <command.h>
- #include <asm/processor.h>
- #include <asm/interrupt.h>
- #include <asm/ppc4xx.h>
- #include <ppc_asm.tmpl>
- #include <asm/io.h>
- #include <asm/xilinx_irq.h>
- DECLARE_GLOBAL_DATA_PTR;
- void pic_enable(void)
- {
- debug("Xilinx PIC at 0x%8x\n", intc);
- /*
- * Disable all external interrupts until they are
- * explicitly requested.
- */
- out_be32((u32 *) IER, 0);
- /* Acknowledge any pending interrupts just in case. */
- out_be32((u32 *) IAR, 0xffffffff);
- /* Turn on the Master Enable. */
- out_be32((u32 *) MER, 0x3UL);
- return;
- }
- int xilinx_pic_irq_get(void)
- {
- u32 irq;
- irq = in_be32((u32 *) IVR);
- /* If no interrupt is pending then all bits of the IVR are set to 1. As
- * the IVR is as many bits wide as numbers of inputs are available.
- * Therefore, if all bits of the IVR are set to one, its content will
- * be bigger than XPAR_INTC_MAX_NUM_INTR_INPUTS.
- */
- if (irq >= XPAR_INTC_MAX_NUM_INTR_INPUTS)
- irq = -1; /* report no pending interrupt. */
- debug("get_irq: %d\n", irq);
- return (irq);
- }
- void pic_irq_enable(unsigned int irq)
- {
- u32 mask = IRQ_MASK(irq);
- debug("enable: %d\n", irq);
- out_be32((u32 *) SIE, mask);
- }
- void pic_irq_disable(unsigned int irq)
- {
- u32 mask = IRQ_MASK(irq);
- debug("disable: %d\n", irq);
- out_be32((u32 *) CIE, mask);
- }
- void pic_irq_ack(unsigned int irq)
- {
- u32 mask = IRQ_MASK(irq);
- debug("ack: %d\n", irq);
- out_be32((u32 *) IAR, mask);
- }
- void external_interrupt(struct pt_regs *regs)
- {
- int irq;
- irq = xilinx_pic_irq_get();
- if (irq < 0)
- return;
- interrupt_run_handler(irq);
- return;
- }
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