/* * (C) Copyright 2008 * Ricado Ribalda-Universidad Autonoma de Madrid-ricardo.ribalda@uam.es * This work has been supported by: QTechnology http://qtec.com/ * Based on interrupts.c Wolfgang Denk-DENX Software Engineering-wd@denx.de * 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, see <http://www.gnu.org/licenses/>. */ #include <common.h> #include <watchdog.h> #include <command.h> #include <asm/processor.h> #include <asm/interrupt.h> #include <ppc4xx.h> #include <ppc_asm.tmpl> #include <commproc.h> #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; }