diff options
Diffstat (limited to 'arch/arc/include/asm/irqflags.h')
| -rw-r--r-- | arch/arc/include/asm/irqflags.h | 168 |
1 files changed, 4 insertions, 164 deletions
diff --git a/arch/arc/include/asm/irqflags.h b/arch/arc/include/asm/irqflags.h index 27ecc6975..59bc6a64f 100644 --- a/arch/arc/include/asm/irqflags.h +++ b/arch/arc/include/asm/irqflags.h @@ -1,4 +1,5 @@ /* + * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com) * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) * * This program is free software; you can redistribute it and/or modify @@ -9,171 +10,10 @@ #ifndef __ASM_ARC_IRQFLAGS_H #define __ASM_ARC_IRQFLAGS_H -/* vineetg: March 2010 : local_irq_save( ) optimisation - * -Remove explicit mov of current status32 into reg, that is not needed - * -Use BIC insn instead of INVERTED + AND - * -Conditionally disable interrupts (if they are not enabled, don't disable) -*/ - -#include <asm/arcregs.h> - -/* status32 Reg bits related to Interrupt Handling */ -#define STATUS_E1_BIT 1 /* Int 1 enable */ -#define STATUS_E2_BIT 2 /* Int 2 enable */ -#define STATUS_A1_BIT 3 /* Int 1 active */ -#define STATUS_A2_BIT 4 /* Int 2 active */ - -#define STATUS_E1_MASK (1<<STATUS_E1_BIT) -#define STATUS_E2_MASK (1<<STATUS_E2_BIT) -#define STATUS_A1_MASK (1<<STATUS_A1_BIT) -#define STATUS_A2_MASK (1<<STATUS_A2_BIT) - -/* Other Interrupt Handling related Aux regs */ -#define AUX_IRQ_LEV 0x200 /* IRQ Priority: L1 or L2 */ -#define AUX_IRQ_HINT 0x201 /* For generating Soft Interrupts */ -#define AUX_IRQ_LV12 0x43 /* interrupt level register */ - -#define AUX_IENABLE 0x40c -#define AUX_ITRIGGER 0x40d -#define AUX_IPULSE 0x415 - -#ifndef __ASSEMBLY__ - -/****************************************************************** - * IRQ Control Macros - * - * All of them have "memory" clobber (compiler barrier) which is needed to - * ensure that LD/ST requiring irq safetly (R-M-W when LLSC is not available) - * are redone after IRQs are re-enabled (and gcc doesn't reuse stale register) - * - * Noted at the time of Abilis Timer List corruption - * Orig Bug + Rejected solution : https://lkml.org/lkml/2013/3/29/67 - * Reasoning : https://lkml.org/lkml/2013/4/8/15 - * - ******************************************************************/ - -/* - * Save IRQ state and disable IRQs - */ -static inline long arch_local_irq_save(void) -{ - unsigned long temp, flags; - - __asm__ __volatile__( - " lr %1, [status32] \n" - " bic %0, %1, %2 \n" - " and.f 0, %1, %2 \n" - " flag.nz %0 \n" - : "=r"(temp), "=r"(flags) - : "n"((STATUS_E1_MASK | STATUS_E2_MASK)) - : "memory", "cc"); - - return flags; -} - -/* - * restore saved IRQ state - */ -static inline void arch_local_irq_restore(unsigned long flags) -{ - - __asm__ __volatile__( - " flag %0 \n" - : - : "r"(flags) - : "memory"); -} - -/* - * Unconditionally Enable IRQs - */ -extern void arch_local_irq_enable(void); - -/* - * Unconditionally Disable IRQs - */ -static inline void arch_local_irq_disable(void) -{ - unsigned long temp; - - __asm__ __volatile__( - " lr %0, [status32] \n" - " and %0, %0, %1 \n" - " flag %0 \n" - : "=&r"(temp) - : "n"(~(STATUS_E1_MASK | STATUS_E2_MASK)) - : "memory"); -} - -/* - * save IRQ state - */ -static inline long arch_local_save_flags(void) -{ - unsigned long temp; - - __asm__ __volatile__( - " lr %0, [status32] \n" - : "=&r"(temp) - : - : "memory"); - - return temp; -} - -/* - * Query IRQ state - */ -static inline int arch_irqs_disabled_flags(unsigned long flags) -{ - return !(flags & (STATUS_E1_MASK -#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS - | STATUS_E2_MASK -#endif - )); -} - -static inline int arch_irqs_disabled(void) -{ - return arch_irqs_disabled_flags(arch_local_save_flags()); -} - -#else - -#ifdef CONFIG_TRACE_IRQFLAGS - -.macro TRACE_ASM_IRQ_DISABLE - bl trace_hardirqs_off -.endm - -.macro TRACE_ASM_IRQ_ENABLE - bl trace_hardirqs_on -.endm - +#ifdef CONFIG_ISA_ARCOMPACT +#include <asm/irqflags-compact.h> #else - -.macro TRACE_ASM_IRQ_DISABLE -.endm - -.macro TRACE_ASM_IRQ_ENABLE -.endm - +#include <asm/irqflags-arcv2.h> #endif -.macro IRQ_DISABLE scratch - lr \scratch, [status32] - bic \scratch, \scratch, (STATUS_E1_MASK | STATUS_E2_MASK) - flag \scratch - TRACE_ASM_IRQ_DISABLE -.endm - -.macro IRQ_ENABLE scratch - lr \scratch, [status32] - or \scratch, \scratch, (STATUS_E1_MASK | STATUS_E2_MASK) - flag \scratch - TRACE_ASM_IRQ_ENABLE -.endm - -#endif /* __ASSEMBLY__ */ - #endif |