From f880c5649ec7a831a45cd254e9ecf9bd25b17dba Mon Sep 17 00:00:00 2001 From: Steve Muckle Date: Wed, 9 Dec 2009 14:03:13 -0800 Subject: [PATCH] msm: irq: rename existing entry-macro to entry-macro-vic The existing MSM irq entry macro is specific to a VIC implementation. Renaming this makes room for irq support based on other interrupt controllers. Signed-off-by: Steve Muckle Signed-off-by: Daniel Walker --- .../mach-msm/include/mach/entry-macro-qgic.S | 88 +++++++++++++++++++ .../mach-msm/include/mach/entry-macro-vic.S | 37 ++++++++ arch/arm/mach-msm/include/mach/entry-macro.S | 43 +++------ arch/arm/mach-msm/include/mach/smp.h | 39 ++++++++ 4 files changed, 178 insertions(+), 29 deletions(-) create mode 100644 arch/arm/mach-msm/include/mach/entry-macro-qgic.S create mode 100644 arch/arm/mach-msm/include/mach/entry-macro-vic.S create mode 100644 arch/arm/mach-msm/include/mach/smp.h diff --git a/arch/arm/mach-msm/include/mach/entry-macro-qgic.S b/arch/arm/mach-msm/include/mach/entry-macro-qgic.S new file mode 100644 index 000000000000..4dc99aa65d07 --- /dev/null +++ b/arch/arm/mach-msm/include/mach/entry-macro-qgic.S @@ -0,0 +1,88 @@ +/* + * Low-level IRQ helper macros + * + * Copyright (c) 2010, Code Aurora Forum. All rights reserved. + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include +#include + + .macro disable_fiq + .endm + + .macro get_irqnr_preamble, base, tmp + ldr \base, =gic_cpu_base_addr + ldr \base, [\base] + .endm + + .macro arch_ret_to_user, tmp1, tmp2 + .endm + + /* + * The interrupt numbering scheme is defined in the + * interrupt controller spec. To wit: + * + * Migrated the code from ARM MP port to be more consistant + * with interrupt processing , the following still holds true + * however, all interrupts are treated the same regardless of + * if they are local IPI or PPI + * + * Interrupts 0-15 are IPI + * 16-31 are PPI + * (16-18 are the timers) + * 32-1020 are global + * 1021-1022 are reserved + * 1023 is "spurious" (no interrupt) + * + * A simple read from the controller will tell us the number of the + * highest priority enabled interrupt. We then just need to check + * whether it is in the valid range for an IRQ (0-1020 inclusive). + * + * Base ARM code assumes that the local (private) peripheral interrupts + * are not valid, we treat them differently, in that the privates are + * handled like normal shared interrupts with the exception that only + * one processor can register the interrupt and the handler must be + * the same for all processors. + */ + + .macro get_irqnr_and_base, irqnr, irqstat, base, tmp + + ldr \irqstat, [\base, #GIC_CPU_INTACK] /* bits 12-10 =srcCPU, + 9-0 =int # */ + + bic \irqnr, \irqstat, #0x1c00 @mask src + cmp \irqnr, #15 + ldr \tmp, =1021 + cmpcc \irqnr, \irqnr + cmpne \irqnr, \tmp + cmpcs \irqnr, \irqnr + + .endm + + /* We assume that irqstat (the raw value of the IRQ acknowledge + * register) is preserved from the macro above. + * If there is an IPI, we immediately signal end of interrupt on the + * controller, since this requires the original irqstat value which + * we won't easily be able to recreate later. + */ + .macro test_for_ipi, irqnr, irqstat, base, tmp + bic \irqnr, \irqstat, #0x1c00 + cmp \irqnr, #16 + strcc \irqstat, [\base, #GIC_CPU_EOI] + cmpcs \irqnr, \irqnr + .endm + + /* As above, this assumes that irqstat and base are preserved.. */ + + .macro test_for_ltirq, irqnr, irqstat, base, tmp + bic \irqnr, \irqstat, #0x1c00 + mov \tmp, #0 + cmp \irqnr, #16 + moveq \tmp, #1 + streq \irqstat, [\base, #GIC_CPU_EOI] + cmp \tmp, #0 + .endm diff --git a/arch/arm/mach-msm/include/mach/entry-macro-vic.S b/arch/arm/mach-msm/include/mach/entry-macro-vic.S new file mode 100644 index 000000000000..70563ed11b36 --- /dev/null +++ b/arch/arm/mach-msm/include/mach/entry-macro-vic.S @@ -0,0 +1,37 @@ +/* + * Copyright (C) 2007 Google, Inc. + * Author: Brian Swetland + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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. + * + */ + +#include + + .macro disable_fiq + .endm + + .macro get_irqnr_preamble, base, tmp + @ enable imprecise aborts + cpsie a + mov \base, #MSM_VIC_BASE + .endm + + .macro arch_ret_to_user, tmp1, tmp2 + .endm + + .macro get_irqnr_and_base, irqnr, irqstat, base, tmp + @ 0xD0 has irq# or old irq# if the irq has been handled + @ 0xD4 has irq# or -1 if none pending *but* if you just + @ read 0xD4 you never get the first irq for some reason + ldr \irqnr, [\base, #0xD0] + ldr \irqnr, [\base, #0xD4] + cmp \irqnr, #0xffffffff + .endm diff --git a/arch/arm/mach-msm/include/mach/entry-macro.S b/arch/arm/mach-msm/include/mach/entry-macro.S index d2259486bcb1..b16f082eeb6f 100644 --- a/arch/arm/mach-msm/include/mach/entry-macro.S +++ b/arch/arm/mach-msm/include/mach/entry-macro.S @@ -1,38 +1,23 @@ -/* arch/arm/mach-msm7200/include/mach/entry-macro.S +/* Copyright (c) 2010, Code Aurora Forum. All rights reserved. * - * Copyright (C) 2007 Google, Inc. - * Author: Brian Swetland - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. * * 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, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + * */ -#include - - .macro disable_fiq - .endm - - .macro get_irqnr_preamble, base, tmp - @ enable imprecise aborts - cpsie a - mov \base, #MSM_VIC_BASE - .endm - - .macro arch_ret_to_user, tmp1, tmp2 - .endm - - .macro get_irqnr_and_base, irqnr, irqstat, base, tmp - @ 0xD0 has irq# or old irq# if the irq has been handled - @ 0xD4 has irq# or -1 if none pending *but* if you just - @ read 0xD4 you never get the first irq for some reason - ldr \irqnr, [\base, #0xD0] - ldr \irqnr, [\base, #0xD4] - cmp \irqnr, #0xffffffff - .endm +#if defined(CONFIG_ARM_GIC) +#include +#else +#include +#endif diff --git a/arch/arm/mach-msm/include/mach/smp.h b/arch/arm/mach-msm/include/mach/smp.h new file mode 100644 index 000000000000..3ff7bf5e679e --- /dev/null +++ b/arch/arm/mach-msm/include/mach/smp.h @@ -0,0 +1,39 @@ +/* Copyright (c) 2010, Code Aurora Forum. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of Code Aurora nor + * the names of its contributors may be used to endorse or promote + * products derived from this software without specific prior written + * permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; + * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR + * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF + * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef __ASM_ARCH_MSM_SMP_H +#define __ASM_ARCH_MSM_SMP_H + +#include + +static inline void smp_cross_call(const struct cpumask *mask) +{ + gic_raise_softirq(mask, 1); +} + +#endif