From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: 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 Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior 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 --- kernel/arch/blackfin/include/asm/irqflags.h | 289 ++++++++++++++++++++++++++++ 1 file changed, 289 insertions(+) create mode 100644 kernel/arch/blackfin/include/asm/irqflags.h (limited to 'kernel/arch/blackfin/include/asm/irqflags.h') diff --git a/kernel/arch/blackfin/include/asm/irqflags.h b/kernel/arch/blackfin/include/asm/irqflags.h new file mode 100644 index 000000000..07aff230a --- /dev/null +++ b/kernel/arch/blackfin/include/asm/irqflags.h @@ -0,0 +1,289 @@ +/* + * interface to Blackfin CEC + * + * Copyright 2009 Analog Devices Inc. + * Licensed under the GPL-2 or later. + */ + +#ifndef __ASM_BFIN_IRQFLAGS_H__ +#define __ASM_BFIN_IRQFLAGS_H__ + +#include + +#ifdef CONFIG_SMP +# include +# include +# define bfin_irq_flags cpu_pda[blackfin_core_id()].imask +#else +extern unsigned long bfin_irq_flags; +#endif + +static inline notrace void bfin_sti(unsigned long flags) +{ + asm volatile("sti %0;" : : "d" (flags)); +} + +static inline notrace unsigned long bfin_cli(void) +{ + unsigned long flags; + asm volatile("cli %0;" : "=d" (flags)); + return flags; +} + +#ifdef CONFIG_DEBUG_HWERR +# define bfin_no_irqs 0x3f +#else +# define bfin_no_irqs 0x1f +#endif + +/*****************************************************************************/ +/* + * Hard, untraced CPU interrupt flag manipulation and access. + */ +static inline notrace void __hard_local_irq_disable(void) +{ + bfin_cli(); +} + +static inline notrace void __hard_local_irq_enable(void) +{ + bfin_sti(bfin_irq_flags); +} + +static inline notrace unsigned long hard_local_save_flags(void) +{ + return bfin_read_IMASK(); +} + +static inline notrace unsigned long __hard_local_irq_save(void) +{ + unsigned long flags; + flags = bfin_cli(); +#ifdef CONFIG_DEBUG_HWERR + bfin_sti(0x3f); +#endif + return flags; +} + +static inline notrace int hard_irqs_disabled_flags(unsigned long flags) +{ +#ifdef CONFIG_BF60x + return (flags & IMASK_IVG11) == 0; +#else + return (flags & ~0x3f) == 0; +#endif +} + +static inline notrace int hard_irqs_disabled(void) +{ + unsigned long flags = hard_local_save_flags(); + return hard_irqs_disabled_flags(flags); +} + +static inline notrace void __hard_local_irq_restore(unsigned long flags) +{ + if (!hard_irqs_disabled_flags(flags)) + __hard_local_irq_enable(); +} + +/*****************************************************************************/ +/* + * Interrupt pipe handling. + */ +#ifdef CONFIG_IPIPE + +#include +#include +/* + * Way too many inter-deps between low-level headers in this port, so + * we redeclare the required bits we cannot pick from + * to prevent circular dependencies. + */ +void __ipipe_stall_root(void); +void __ipipe_unstall_root(void); +unsigned long __ipipe_test_root(void); +unsigned long __ipipe_test_and_stall_root(void); +void __ipipe_restore_root(unsigned long flags); + +#ifdef CONFIG_IPIPE_DEBUG_CONTEXT +struct ipipe_domain; +extern struct ipipe_domain ipipe_root; +void ipipe_check_context(struct ipipe_domain *ipd); +#define __check_irqop_context(ipd) ipipe_check_context(&ipipe_root) +#else /* !CONFIG_IPIPE_DEBUG_CONTEXT */ +#define __check_irqop_context(ipd) do { } while (0) +#endif /* !CONFIG_IPIPE_DEBUG_CONTEXT */ + +/* + * Interrupt pipe interface to linux/irqflags.h. + */ +static inline notrace void arch_local_irq_disable(void) +{ + __check_irqop_context(); + __ipipe_stall_root(); + barrier(); +} + +static inline notrace void arch_local_irq_enable(void) +{ + barrier(); + __check_irqop_context(); + __ipipe_unstall_root(); +} + +static inline notrace unsigned long arch_local_save_flags(void) +{ + return __ipipe_test_root() ? bfin_no_irqs : bfin_irq_flags; +} + +static inline notrace int arch_irqs_disabled_flags(unsigned long flags) +{ + return flags == bfin_no_irqs; +} + +static inline notrace unsigned long arch_local_irq_save(void) +{ + unsigned long flags; + + __check_irqop_context(); + flags = __ipipe_test_and_stall_root() ? bfin_no_irqs : bfin_irq_flags; + barrier(); + + return flags; +} + +static inline notrace void arch_local_irq_restore(unsigned long flags) +{ + __check_irqop_context(); + __ipipe_restore_root(flags == bfin_no_irqs); +} + +static inline notrace unsigned long arch_mangle_irq_bits(int virt, unsigned long real) +{ + /* + * Merge virtual and real interrupt mask bits into a single + * 32bit word. + */ + return (real & ~(1 << 31)) | ((virt != 0) << 31); +} + +static inline notrace int arch_demangle_irq_bits(unsigned long *x) +{ + int virt = (*x & (1 << 31)) != 0; + *x &= ~(1L << 31); + return virt; +} + +/* + * Interface to various arch routines that may be traced. + */ +#ifdef CONFIG_IPIPE_TRACE_IRQSOFF +static inline notrace void hard_local_irq_disable(void) +{ + if (!hard_irqs_disabled()) { + __hard_local_irq_disable(); + ipipe_trace_begin(0x80000000); + } +} + +static inline notrace void hard_local_irq_enable(void) +{ + if (hard_irqs_disabled()) { + ipipe_trace_end(0x80000000); + __hard_local_irq_enable(); + } +} + +static inline notrace unsigned long hard_local_irq_save(void) +{ + unsigned long flags = hard_local_save_flags(); + if (!hard_irqs_disabled_flags(flags)) { + __hard_local_irq_disable(); + ipipe_trace_begin(0x80000001); + } + return flags; +} + +static inline notrace void hard_local_irq_restore(unsigned long flags) +{ + if (!hard_irqs_disabled_flags(flags)) { + ipipe_trace_end(0x80000001); + __hard_local_irq_enable(); + } +} + +#else /* !CONFIG_IPIPE_TRACE_IRQSOFF */ +# define hard_local_irq_disable() __hard_local_irq_disable() +# define hard_local_irq_enable() __hard_local_irq_enable() +# define hard_local_irq_save() __hard_local_irq_save() +# define hard_local_irq_restore(flags) __hard_local_irq_restore(flags) +#endif /* !CONFIG_IPIPE_TRACE_IRQSOFF */ + +#define hard_local_irq_save_cond() hard_local_irq_save() +#define hard_local_irq_restore_cond(flags) hard_local_irq_restore(flags) + +#else /* !CONFIG_IPIPE */ + +/* + * Direct interface to linux/irqflags.h. + */ +#define arch_local_save_flags() hard_local_save_flags() +#define arch_local_irq_save() __hard_local_irq_save() +#define arch_local_irq_restore(flags) __hard_local_irq_restore(flags) +#define arch_local_irq_enable() __hard_local_irq_enable() +#define arch_local_irq_disable() __hard_local_irq_disable() +#define arch_irqs_disabled_flags(flags) hard_irqs_disabled_flags(flags) +#define arch_irqs_disabled() hard_irqs_disabled() + +/* + * Interface to various arch routines that may be traced. + */ +#define hard_local_irq_save() __hard_local_irq_save() +#define hard_local_irq_restore(flags) __hard_local_irq_restore(flags) +#define hard_local_irq_enable() __hard_local_irq_enable() +#define hard_local_irq_disable() __hard_local_irq_disable() +#define hard_local_irq_save_cond() hard_local_save_flags() +#define hard_local_irq_restore_cond(flags) do { (void)(flags); } while (0) + +#endif /* !CONFIG_IPIPE */ + +#ifdef CONFIG_SMP +#define hard_local_irq_save_smp() hard_local_irq_save() +#define hard_local_irq_restore_smp(flags) hard_local_irq_restore(flags) +#else +#define hard_local_irq_save_smp() hard_local_save_flags() +#define hard_local_irq_restore_smp(flags) do { (void)(flags); } while (0) +#endif + +/* + * Remap the arch-neutral IRQ state manipulation macros to the + * blackfin-specific hard_local_irq_* API. + */ +#define local_irq_save_hw(flags) \ + do { \ + (flags) = hard_local_irq_save(); \ + } while (0) +#define local_irq_restore_hw(flags) \ + do { \ + hard_local_irq_restore(flags); \ + } while (0) +#define local_irq_disable_hw() \ + do { \ + hard_local_irq_disable(); \ + } while (0) +#define local_irq_enable_hw() \ + do { \ + hard_local_irq_enable(); \ + } while (0) +#define local_irq_save_hw_notrace(flags) \ + do { \ + (flags) = __hard_local_irq_save(); \ + } while (0) +#define local_irq_restore_hw_notrace(flags) \ + do { \ + __hard_local_irq_restore(flags); \ + } while (0) + +#define irqs_disabled_hw() hard_irqs_disabled() + +#endif -- cgit 1.2.3-korg