5019609fce
The mpic->irq_count variable is only used as a software error-checking limit to determine whether or not an IRQ number is valid. In board code which does not manually specify an IRQ count to mpic_alloc(), i.e. 0, it is automatically detected from the number of ISUs and the ISU size. In practice, all hardware ends up with irq_count == num_sources, so all of the runtime checks on mpic->irq_count should just check the value of mpic->num_sources instead. When platform hardware does not correctly report the number of IRQs, which only happens on the MPC85xx/MPC86xx, the MPIC_BROKEN_FRR_NIRQS flag is used to override the detected value of num_sources with the manual irq_count parameter. Since there's no need to manually specify the number of IRQs except in this case, the extra flag can be eliminated and the test changed to "irq_count != 0". Signed-off-by: Kyle Moffett <Kyle.D.Moffett@boeing.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
97 lines
2.1 KiB
C
97 lines
2.1 KiB
C
/*
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* P1010RDB Board Setup
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*
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* Copyright 2011 Freescale Semiconductor Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/stddef.h>
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#include <linux/kernel.h>
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#include <linux/pci.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/of_platform.h>
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#include <asm/system.h>
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#include <asm/time.h>
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#include <asm/machdep.h>
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#include <asm/pci-bridge.h>
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#include <mm/mmu_decl.h>
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#include <asm/prom.h>
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#include <asm/udbg.h>
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#include <asm/mpic.h>
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#include <sysdev/fsl_soc.h>
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#include <sysdev/fsl_pci.h>
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#include "mpc85xx.h"
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void __init p1010_rdb_pic_init(void)
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{
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struct mpic *mpic = mpic_alloc(NULL, 0,
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MPIC_WANTS_RESET | MPIC_BIG_ENDIAN |
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MPIC_SINGLE_DEST_CPU,
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0, 256, " OpenPIC ");
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BUG_ON(mpic == NULL);
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mpic_init(mpic);
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}
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/*
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* Setup the architecture
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*/
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static void __init p1010_rdb_setup_arch(void)
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{
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#ifdef CONFIG_PCI
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struct device_node *np;
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#endif
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if (ppc_md.progress)
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ppc_md.progress("p1010_rdb_setup_arch()", 0);
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#ifdef CONFIG_PCI
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for_each_node_by_type(np, "pci") {
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if (of_device_is_compatible(np, "fsl,p1010-pcie"))
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fsl_add_bridge(np, 0);
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}
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#endif
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printk(KERN_INFO "P1010 RDB board from Freescale Semiconductor\n");
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}
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machine_device_initcall(p1010_rdb, mpc85xx_common_publish_devices);
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machine_arch_initcall(p1010_rdb, swiotlb_setup_bus_notifier);
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/*
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* Called very early, device-tree isn't unflattened
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*/
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static int __init p1010_rdb_probe(void)
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{
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unsigned long root = of_get_flat_dt_root();
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if (of_flat_dt_is_compatible(root, "fsl,P1010RDB"))
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return 1;
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return 0;
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}
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define_machine(p1010_rdb) {
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.name = "P1010 RDB",
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.probe = p1010_rdb_probe,
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.setup_arch = p1010_rdb_setup_arch,
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.init_IRQ = p1010_rdb_pic_init,
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#ifdef CONFIG_PCI
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.pcibios_fixup_bus = fsl_pcibios_fixup_bus,
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#endif
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.get_irq = mpic_get_irq,
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.restart = fsl_rstcr_restart,
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.calibrate_decr = generic_calibrate_decr,
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.progress = udbg_progress,
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};
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