diff options
author | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
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committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/powerpc/include/asm/hw_irq.h | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/powerpc/include/asm/hw_irq.h')
-rw-r--r-- | kernel/arch/powerpc/include/asm/hw_irq.h | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/kernel/arch/powerpc/include/asm/hw_irq.h b/kernel/arch/powerpc/include/asm/hw_irq.h new file mode 100644 index 000000000..b59ac27a6 --- /dev/null +++ b/kernel/arch/powerpc/include/asm/hw_irq.h @@ -0,0 +1,212 @@ +/* + * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu> + */ +#ifndef _ASM_POWERPC_HW_IRQ_H +#define _ASM_POWERPC_HW_IRQ_H + +#ifdef __KERNEL__ + +#include <linux/errno.h> +#include <linux/compiler.h> +#include <asm/ptrace.h> +#include <asm/processor.h> + +#ifdef CONFIG_PPC64 + +/* + * PACA flags in paca->irq_happened. + * + * This bits are set when interrupts occur while soft-disabled + * and allow a proper replay. Additionally, PACA_IRQ_HARD_DIS + * is set whenever we manually hard disable. + */ +#define PACA_IRQ_HARD_DIS 0x01 +#define PACA_IRQ_DBELL 0x02 +#define PACA_IRQ_EE 0x04 +#define PACA_IRQ_DEC 0x08 /* Or FIT */ +#define PACA_IRQ_EE_EDGE 0x10 /* BookE only */ +#define PACA_IRQ_HMI 0x20 + +#endif /* CONFIG_PPC64 */ + +#ifndef __ASSEMBLY__ + +extern void __replay_interrupt(unsigned int vector); + +extern void timer_interrupt(struct pt_regs *); +extern void performance_monitor_exception(struct pt_regs *regs); +extern void WatchdogException(struct pt_regs *regs); +extern void unknown_exception(struct pt_regs *regs); + +#ifdef CONFIG_PPC64 +#include <asm/paca.h> + +static inline unsigned long arch_local_save_flags(void) +{ + unsigned long flags; + + asm volatile( + "lbz %0,%1(13)" + : "=r" (flags) + : "i" (offsetof(struct paca_struct, soft_enabled))); + + return flags; +} + +static inline unsigned long arch_local_irq_disable(void) +{ + unsigned long flags, zero; + + asm volatile( + "li %1,0; lbz %0,%2(13); stb %1,%2(13)" + : "=r" (flags), "=&r" (zero) + : "i" (offsetof(struct paca_struct, soft_enabled)) + : "memory"); + + return flags; +} + +extern void arch_local_irq_restore(unsigned long); + +static inline void arch_local_irq_enable(void) +{ + arch_local_irq_restore(1); +} + +static inline unsigned long arch_local_irq_save(void) +{ + return arch_local_irq_disable(); +} + +static inline bool arch_irqs_disabled_flags(unsigned long flags) +{ + return flags == 0; +} + +static inline bool arch_irqs_disabled(void) +{ + return arch_irqs_disabled_flags(arch_local_save_flags()); +} + +#ifdef CONFIG_PPC_BOOK3E +#define __hard_irq_enable() asm volatile("wrteei 1" : : : "memory") +#define __hard_irq_disable() asm volatile("wrteei 0" : : : "memory") +#else +#define __hard_irq_enable() __mtmsrd(local_paca->kernel_msr | MSR_EE, 1) +#define __hard_irq_disable() __mtmsrd(local_paca->kernel_msr, 1) +#endif + +#define hard_irq_disable() do { \ + u8 _was_enabled; \ + __hard_irq_disable(); \ + _was_enabled = local_paca->soft_enabled; \ + local_paca->soft_enabled = 0; \ + local_paca->irq_happened |= PACA_IRQ_HARD_DIS; \ + if (_was_enabled) \ + trace_hardirqs_off(); \ +} while(0) + +static inline bool lazy_irq_pending(void) +{ + return !!(get_paca()->irq_happened & ~PACA_IRQ_HARD_DIS); +} + +/* + * This is called by asynchronous interrupts to conditionally + * re-enable hard interrupts when soft-disabled after having + * cleared the source of the interrupt + */ +static inline void may_hard_irq_enable(void) +{ + get_paca()->irq_happened &= ~PACA_IRQ_HARD_DIS; + if (!(get_paca()->irq_happened & PACA_IRQ_EE)) + __hard_irq_enable(); +} + +static inline bool arch_irq_disabled_regs(struct pt_regs *regs) +{ + return !regs->softe; +} + +extern bool prep_irq_for_idle(void); + +#else /* CONFIG_PPC64 */ + +#define SET_MSR_EE(x) mtmsr(x) + +static inline unsigned long arch_local_save_flags(void) +{ + return mfmsr(); +} + +static inline void arch_local_irq_restore(unsigned long flags) +{ +#if defined(CONFIG_BOOKE) + asm volatile("wrtee %0" : : "r" (flags) : "memory"); +#else + mtmsr(flags); +#endif +} + +static inline unsigned long arch_local_irq_save(void) +{ + unsigned long flags = arch_local_save_flags(); +#ifdef CONFIG_BOOKE + asm volatile("wrteei 0" : : : "memory"); +#else + SET_MSR_EE(flags & ~MSR_EE); +#endif + return flags; +} + +static inline void arch_local_irq_disable(void) +{ +#ifdef CONFIG_BOOKE + asm volatile("wrteei 0" : : : "memory"); +#else + arch_local_irq_save(); +#endif +} + +static inline void arch_local_irq_enable(void) +{ +#ifdef CONFIG_BOOKE + asm volatile("wrteei 1" : : : "memory"); +#else + unsigned long msr = mfmsr(); + SET_MSR_EE(msr | MSR_EE); +#endif +} + +static inline bool arch_irqs_disabled_flags(unsigned long flags) +{ + return (flags & MSR_EE) == 0; +} + +static inline bool arch_irqs_disabled(void) +{ + return arch_irqs_disabled_flags(arch_local_save_flags()); +} + +#define hard_irq_disable() arch_local_irq_disable() + +static inline bool arch_irq_disabled_regs(struct pt_regs *regs) +{ + return !(regs->msr & MSR_EE); +} + +static inline void may_hard_irq_enable(void) { } + +#endif /* CONFIG_PPC64 */ + +#define ARCH_IRQ_INIT_FLAGS IRQ_NOREQUEST + +/* + * interrupt-retrigger: should we handle this via lost interrupts and IPIs + * or should we not care like we do now ? --BenH. + */ +struct irq_chip; + +#endif /* __ASSEMBLY__ */ +#endif /* __KERNEL__ */ +#endif /* _ASM_POWERPC_HW_IRQ_H */ |