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linux_dsm_epyc7002/arch/arc/include/asm/irq.h

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ARC: Interrupt Handling This contains: -bootup arch IRQ init: init_IRQ(), arc_init_IRQ() -generic IRQ subsystem glue: arch_do_IRQ() -basic IRQ chip setup for in-core intc Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Cc: Thomas Gleixner <tglx@linutronix.de>
2013-01-18 16:42:18 +07:00
/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_ARC_IRQ_H
#define __ASM_ARC_IRQ_H
ARCv2: intc: Rework the build time irq count information Currently Kconfig knob ARC_NUMBER_OF_INTERRUPTS is used as indicator of hard irq count. But it is flawed that it doesn't affect - NR_IRQS : for number of virtual interrupts - NR_CPU_IRQS : for number of hardware interrupts Moreover the actual hardware irq count might still not be same as ARC_NUMBER_OF_INTERRUPTS. So use the information availble in the Build Configuration Registers and get rid of the Kconfig option. We still need "some" build time info about irq count to set up sufficient number of vector table entries. This is done with a sufficiently large NR_CPU_IRQS which will eventually be used soley for that purpose (subsequent patches will remove its usage elsewhere) So to summarize what this patch does: * NR_CPU_IRQS defines a maximum number of hardware interrupts. * Remove ARC_NUMBER_OF_INTERRUPTS option and create interrupts table for all possible hardware interrupts. * Increase a maximum number of virtual IRQs to 512. ARCv2 can support 240 interrupts in the core interrupts controllers and 128 interrupts in IDU. Thus 512 virtual IRQs must be enough for most configurations of boards. This patch leads to NR_CPU_IRQS in 2 places, to reduce the overall churn. The next patch will remove the 2nd definition anyways. Signed-off-by: Yuriy Kolerov <yuriy.kolerov@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com> [vgupta: reworked the changelog a bit]
2017-01-31 18:45:22 +07:00
/*
* ARCv2 can support 240 interrupts in the core interrupts controllers and
* 128 interrupts in IDU. Thus 512 virtual IRQs must be enough for most
* configurations of boards.
* This doesnt affect ARCompact, but we change it to same value
*/
#define NR_IRQS 512
ARC: [Review] Multi-platform image #5: NR_IRQS defined by ARC core For now this will suffice for all platforms, later exotic ones needs to get this from DeviceTree Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Cc: Arnd Bergmann <arnd@arndb.de>
2013-01-18 16:42:26 +07:00
ARC: irq: export some IRQs again This will be needed for switching to linear irq domain as irq_create_mapping() called by intr code needs the IRQ numbers in addition to existing usage in mcip.c for requesting the irq Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2016-03-30 20:05:28 +07:00
/* Platform Independent IRQs */
#ifdef CONFIG_ISA_ARCV2
#define IPI_IRQ 19
#define SOFTIRQ_IRQ 21
ARCv2: intc: Use runtime value of irq count for setting up intc Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2017-02-02 00:44:33 +07:00
#define FIRST_EXT_IRQ 24
ARC: irq: export some IRQs again This will be needed for switching to linear irq domain as irq_create_mapping() called by intr code needs the IRQ numbers in addition to existing usage in mcip.c for requesting the irq Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2016-03-30 20:05:28 +07:00
#endif
ARC: [SMP] unify cpu private IRQ requests (TIMER/IPI) The current cpu-private IRQ registration is ugly as it requires need to expose arch_unmask_irq() outside of intc code. So switch to percpu IRQ APIs: -request_percpu_irq [boot core] -enable_percpu_irq [all cores] Encapsulated in helper arc_request_percpu_irq() Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2014-05-07 16:55:10 +07:00
#include <linux/interrupt.h>
ARC: Interrupt Handling This contains: -bootup arch IRQ init: init_IRQ(), arc_init_IRQ() -generic IRQ subsystem glue: arch_do_IRQ() -basic IRQ chip setup for in-core intc Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Cc: Thomas Gleixner <tglx@linutronix.de>
2013-01-18 16:42:18 +07:00
#include <asm-generic/irq.h>
arc: remove '__init' for setup_processor() and arc_init_IRQ() They haven't '__init' in definition, but has '__init' in declaration. And normal function start_kernel_secondary() may call setup_processor() which will call arc_init_IRQ(). So need remove '__init' for both of them. The related warning (with allmodconfig): MODPOST vmlinux.o WARNING: vmlinux.o(.text+0x3084): Section mismatch in reference from the function start_kernel_secondary() to the function .init.text:setup_processor() The function start_kernel_secondary() references the function __init setup_processor(). This is often because start_kernel_secondary lacks a __init annotation or the annotation of setup_processor is wrong. Signed-off-by: Chen Gang <gang.chen@asianux.com>
2013-10-23 09:12:05 +07:00
extern void arc_init_IRQ(void);
ARC: Timers/counters/delay management ARC700 includes 2 in-core 32bit timers TIMER0 and TIMER1. Both have exactly same capabilies. * programmable to count from TIMER<n>_CNT to TIMER<n>_LIMIT * for count 0 and LIMIT ~1, provides a free-running counter by auto-wrapping when limit is reached. * optionally interrupt when LIMIT is reached (oneshot event semantics) * rearming the interrupt provides periodic semantics * run at CPU clk ARC Linux uses TIMER0 for clockevent (periodic/oneshot) and TIMER1 for clocksource (free-running clock). Newer cores provide RTSC insn which gives a 64bit cpu clk snapshot hence is more apt for clocksource when available. SMP poses a bit of challenge for global timekeeping clocksource / sched_clock() backend: -TIMER1 based local clocks are out-of-sync hence can't be used (thus we default to jiffies based cs as well as sched_clock() one/both of which platform can override with it's specific hardware assist) -RTSC is only allowed in SMP if it's cross-core-sync (Kconfig glue ensures that) and thus usable for both requirements. Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Cc: Thomas Gleixner <tglx@linutronix.de>
2013-01-18 16:42:18 +07:00
ARC: Interrupt Handling This contains: -bootup arch IRQ init: init_IRQ(), arc_init_IRQ() -generic IRQ subsystem glue: arch_do_IRQ() -basic IRQ chip setup for in-core intc Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Cc: Thomas Gleixner <tglx@linutronix.de>
2013-01-18 16:42:18 +07:00
#endif
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