diff options
author | 2016-04-11 10:41:07 +0300 | |
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committer | 2016-04-13 08:17:18 +0300 | |
commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/arch/arc/include/asm/irqflags-arcv2.h | |
parent | f93b97fd65072de626c074dbe099a1fff05ce060 (diff) |
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page.
During the rebasing, the following patch collided:
Force tick interrupt and get rid of softirq magic(I70131fb85).
Collisions have been removed because its logic was found on the
source already.
Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/arch/arc/include/asm/irqflags-arcv2.h')
-rw-r--r-- | kernel/arch/arc/include/asm/irqflags-arcv2.h | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/kernel/arch/arc/include/asm/irqflags-arcv2.h b/kernel/arch/arc/include/asm/irqflags-arcv2.h new file mode 100644 index 000000000..68b609234 --- /dev/null +++ b/kernel/arch/arc/include/asm/irqflags-arcv2.h @@ -0,0 +1,138 @@ +/* + * Copyright (C) 2014-15 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_ARCV2_H +#define __ASM_IRQFLAGS_ARCV2_H + +#include <asm/arcregs.h> + +/* status32 Bits */ +#define STATUS_AD_BIT 19 /* Disable Align chk: core supports non-aligned */ +#define STATUS_IE_BIT 31 + +#define STATUS_AD_MASK (1<<STATUS_AD_BIT) +#define STATUS_IE_MASK (1<<STATUS_IE_BIT) + +#define AUX_USER_SP 0x00D +#define AUX_IRQ_CTRL 0x00E +#define AUX_IRQ_ACT 0x043 /* Active Intr across all levels */ +#define AUX_IRQ_LVL_PEND 0x200 /* Pending Intr across all levels */ +#define AUX_IRQ_HINT 0x201 /* For generating Soft Interrupts */ +#define AUX_IRQ_PRIORITY 0x206 +#define ICAUSE 0x40a +#define AUX_IRQ_SELECT 0x40b +#define AUX_IRQ_ENABLE 0x40c + +/* Was Intr taken in User Mode */ +#define AUX_IRQ_ACT_BIT_U 31 + +/* 0 is highest level, but taken by FIRQs, if present in design */ +#define ARCV2_IRQ_DEF_PRIO 0 + +/* seed value for status register */ +#define ISA_INIT_STATUS_BITS (STATUS_IE_MASK | STATUS_AD_MASK | \ + (ARCV2_IRQ_DEF_PRIO << 1)) + +/* SLEEP needs default irq priority (<=) which can interrupt the doze */ +#define ISA_SLEEP_ARG (0x10 | ARCV2_IRQ_DEF_PRIO) + +#ifndef __ASSEMBLY__ + +/* + * Save IRQ state and disable IRQs + */ +static inline long arch_local_irq_save(void) +{ + unsigned long flags; + + __asm__ __volatile__(" clri %0 \n" : "=r" (flags) : : "memory"); + + return flags; +} + +/* + * restore saved IRQ state + */ +static inline void arch_local_irq_restore(unsigned long flags) +{ + __asm__ __volatile__(" seti %0 \n" : : "r" (flags) : "memory"); +} + +/* + * Unconditionally Enable IRQs + */ +static inline void arch_local_irq_enable(void) +{ + unsigned int irqact = read_aux_reg(AUX_IRQ_ACT); + + if (irqact & 0xffff) + write_aux_reg(AUX_IRQ_ACT, irqact & ~0xffff); + + __asm__ __volatile__(" seti \n" : : : "memory"); +} + +/* + * Unconditionally Disable IRQs + */ +static inline void arch_local_irq_disable(void) +{ + __asm__ __volatile__(" clri \n" : : : "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_IE_MASK)); +} + +static inline int arch_irqs_disabled(void) +{ + return arch_irqs_disabled_flags(arch_local_save_flags()); +} + +static inline void arc_softirq_trigger(int irq) +{ + write_aux_reg(AUX_IRQ_HINT, irq); +} + +static inline void arc_softirq_clear(int irq) +{ + write_aux_reg(AUX_IRQ_HINT, 0); +} + +#else + +.macro IRQ_DISABLE scratch + clri +.endm + +.macro IRQ_ENABLE scratch + seti +.endm + +#endif /* __ASSEMBLY__ */ + +#endif |