mirror of
https://github.com/brain-hackers/u-boot-brain
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5b8e76c35e
There was for long time no activity in the 8xx area. We need to go further and convert to Kconfig, but it turned out, nobody is interested anymore in 8xx, so remove it (with a heavy heart, knowing that I remove here the root of U-Boot). Signed-off-by: Heiko Schocher <hs@denx.de>
89 lines
1.8 KiB
C
89 lines
1.8 KiB
C
/*
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* (C) Copyright 2008
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* Ricado Ribalda-Universidad Autonoma de Madrid-ricardo.ribalda@gmail.com
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* This work has been supported by: QTechnology http://qtec.com/
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* Based on interrupts.c Wolfgang Denk-DENX Software Engineering-wd@denx.de
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <watchdog.h>
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#include <command.h>
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#include <asm/processor.h>
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#include <asm/interrupt.h>
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#include <asm/ppc4xx.h>
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#include <ppc_asm.tmpl>
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#include <asm/io.h>
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#include <asm/xilinx_irq.h>
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DECLARE_GLOBAL_DATA_PTR;
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void pic_enable(void)
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{
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debug("Xilinx PIC at 0x%8x\n", intc);
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/*
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* Disable all external interrupts until they are
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* explicitly requested.
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*/
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out_be32((u32 *) IER, 0);
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/* Acknowledge any pending interrupts just in case. */
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out_be32((u32 *) IAR, 0xffffffff);
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/* Turn on the Master Enable. */
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out_be32((u32 *) MER, 0x3UL);
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return;
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}
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int xilinx_pic_irq_get(void)
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{
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u32 irq;
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irq = in_be32((u32 *) IVR);
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/* If no interrupt is pending then all bits of the IVR are set to 1. As
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* the IVR is as many bits wide as numbers of inputs are available.
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* Therefore, if all bits of the IVR are set to one, its content will
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* be bigger than XPAR_INTC_MAX_NUM_INTR_INPUTS.
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*/
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if (irq >= XPAR_INTC_MAX_NUM_INTR_INPUTS)
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irq = -1; /* report no pending interrupt. */
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debug("get_irq: %d\n", irq);
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return (irq);
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}
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void pic_irq_enable(unsigned int irq)
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{
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u32 mask = IRQ_MASK(irq);
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debug("enable: %d\n", irq);
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out_be32((u32 *) SIE, mask);
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}
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void pic_irq_disable(unsigned int irq)
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{
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u32 mask = IRQ_MASK(irq);
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debug("disable: %d\n", irq);
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out_be32((u32 *) CIE, mask);
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}
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void pic_irq_ack(unsigned int irq)
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{
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u32 mask = IRQ_MASK(irq);
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debug("ack: %d\n", irq);
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out_be32((u32 *) IAR, mask);
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}
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void external_interrupt(struct pt_regs *regs)
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{
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int irq;
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irq = xilinx_pic_irq_get();
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if (irq < 0)
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return;
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interrupt_run_handler(irq);
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return;
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}
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