/* * 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 * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #ifndef __ASM_IRQFLAGS_ARCOMPACT_H #define __ASM_IRQFLAGS_ARCOMPACT_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_AE_BIT 5 /* Exception 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) #define STATUS_AE_MASK (1<<STATUS_AE_BIT) #define STATUS_IE_MASK (STATUS_E1_MASK | STATUS_E2_MASK) /* 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 #define ISA_INIT_STATUS_BITS STATUS_IE_MASK #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 */ static inline void arch_local_irq_enable(void) { unsigned long temp; __asm__ __volatile__( " lr %0, [status32] \n" " or %0, %0, %1 \n" " flag %0 \n" : "=&r"(temp) : "n"((STATUS_E1_MASK | STATUS_E2_MASK)) : "cc", "memory"); } /* * 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 #else .macro TRACE_ASM_IRQ_DISABLE .endm .macro TRACE_ASM_IRQ_ENABLE .endm #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 TRACE_ASM_IRQ_ENABLE lr \scratch, [status32] or \scratch, \scratch, (STATUS_E1_MASK | STATUS_E2_MASK) flag \scratch .endm #endif /* __ASSEMBLY__ */ #endif
Name | Type | Size | Permission | Actions |
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Kbuild | File | 681 B | 0644 |
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arcregs.h | File | 8.59 KB | 0644 |
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asm-offsets.h | File | 311 B | 0644 |
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atomic.h | File | 15.14 KB | 0644 |
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barrier.h | File | 1.75 KB | 0644 |
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bitops.h | File | 9.81 KB | 0644 |
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bug.h | File | 938 B | 0644 |
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cache.h | File | 3.77 KB | 0644 |
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cacheflush.h | File | 3.88 KB | 0644 |
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checksum.h | File | 2.45 KB | 0644 |
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cmpxchg.h | File | 5.4 KB | 0644 |
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current.h | File | 695 B | 0644 |
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delay.h | File | 1.99 KB | 0644 |
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disasm.h | File | 3.87 KB | 0644 |
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dma-mapping.h | File | 734 B | 0644 |
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dma.h | File | 459 B | 0644 |
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dwarf.h | File | 892 B | 0644 |
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elf.h | File | 2.15 KB | 0644 |
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entry-arcv2.h | File | 4.85 KB | 0644 |
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entry-compact.h | File | 9.29 KB | 0644 |
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entry.h | File | 6.73 KB | 0644 |
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exec.h | File | 410 B | 0644 |
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fb.h | File | 411 B | 0644 |
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futex.h | File | 3.67 KB | 0644 |
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highmem.h | File | 1.46 KB | 0644 |
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hugepage.h | File | 2.41 KB | 0644 |
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io.h | File | 6.43 KB | 0644 |
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irq.h | File | 825 B | 0644 |
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irqflags-arcv2.h | File | 3.45 KB | 0644 |
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irqflags-compact.h | File | 4.25 KB | 0644 |
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irqflags.h | File | 509 B | 0644 |
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kdebug.h | File | 400 B | 0644 |
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kgdb.h | File | 1.35 KB | 0644 |
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kmap_types.h | File | 489 B | 0644 |
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kprobes.h | File | 1.37 KB | 0644 |
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linkage.h | File | 1.42 KB | 0644 |
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mach_desc.h | File | 2.06 KB | 0644 |
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mmu.h | File | 2.44 KB | 0644 |
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mmu_context.h | File | 5.67 KB | 0644 |
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mmzone.h | File | 989 B | 0644 |
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module.h | File | 661 B | 0644 |
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page.h | File | 2.99 KB | 0644 |
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pci.h | File | 705 B | 0644 |
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perf_event.h | File | 6.86 KB | 0644 |
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pgalloc.h | File | 3.79 KB | 0644 |
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pgtable.h | File | 14.2 KB | 0644 |
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processor.h | File | 4.69 KB | 0644 |
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ptrace.h | File | 3.87 KB | 0644 |
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sections.h | File | 407 B | 0644 |
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segment.h | File | 612 B | 0644 |
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serial.h | File | 644 B | 0644 |
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setup.h | File | 1.18 KB | 0644 |
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shmparam.h | File | 442 B | 0644 |
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smp.h | File | 4.25 KB | 0644 |
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spinlock.h | File | 8.79 KB | 0644 |
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spinlock_types.h | File | 1.03 KB | 0644 |
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stacktrace.h | File | 1.29 KB | 0644 |
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string.h | File | 1.15 KB | 0644 |
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switch_to.h | File | 1.17 KB | 0644 |
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syscall.h | File | 1.57 KB | 0644 |
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syscalls.h | File | 653 B | 0644 |
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thread_info.h | File | 3.39 KB | 0644 |
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timex.h | File | 508 B | 0644 |
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tlb-mmu1.h | File | 3.48 KB | 0644 |
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tlb.h | File | 1.23 KB | 0644 |
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tlbflush.h | File | 1.76 KB | 0644 |
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uaccess.h | File | 18.45 KB | 0644 |
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unaligned.h | File | 771 B | 0644 |
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unwind.h | File | 3.51 KB | 0644 |
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