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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /arch/sparc/include/asm/irqflags_64.h | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | arch/sparc/include/asm/irqflags_64.h | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/irqflags_64.h b/arch/sparc/include/asm/irqflags_64.h new file mode 100644 index 0000000000..c29ed571ae --- /dev/null +++ b/arch/sparc/include/asm/irqflags_64.h @@ -0,0 +1,98 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * include/asm/irqflags.h + * + * IRQ flags handling + * + * This file gets included from lowlevel asm headers too, to provide + * wrapped versions of the local_irq_*() APIs, based on the + * arch_local_irq_*() functions from the lowlevel headers. + */ +#ifndef _ASM_IRQFLAGS_H +#define _ASM_IRQFLAGS_H + +#include <asm/pil.h> + +#ifndef __ASSEMBLY__ + +static inline notrace unsigned long arch_local_save_flags(void) +{ + unsigned long flags; + + __asm__ __volatile__( + "rdpr %%pil, %0" + : "=r" (flags) + ); + + return flags; +} + +static inline notrace void arch_local_irq_restore(unsigned long flags) +{ + __asm__ __volatile__( + "wrpr %0, %%pil" + : /* no output */ + : "r" (flags) + : "memory" + ); +} + +static inline notrace void arch_local_irq_disable(void) +{ + __asm__ __volatile__( + "wrpr %0, %%pil" + : /* no outputs */ + : "i" (PIL_NORMAL_MAX) + : "memory" + ); +} + +static inline notrace void arch_local_irq_enable(void) +{ + __asm__ __volatile__( + "wrpr 0, %%pil" + : /* no outputs */ + : /* no inputs */ + : "memory" + ); +} + +static inline notrace int arch_irqs_disabled_flags(unsigned long flags) +{ + return (flags > 0); +} + +static inline notrace int arch_irqs_disabled(void) +{ + return arch_irqs_disabled_flags(arch_local_save_flags()); +} + +static inline notrace unsigned long arch_local_irq_save(void) +{ + unsigned long flags, tmp; + + /* Disable interrupts to PIL_NORMAL_MAX unless we already + * are using PIL_NMI, in which case PIL_NMI is retained. + * + * The only values we ever program into the %pil are 0, + * PIL_NORMAL_MAX and PIL_NMI. + * + * Since PIL_NMI is the largest %pil value and all bits are + * set in it (0xf), it doesn't matter what PIL_NORMAL_MAX + * actually is. + */ + __asm__ __volatile__( + "rdpr %%pil, %0\n\t" + "or %0, %2, %1\n\t" + "wrpr %1, 0x0, %%pil" + : "=r" (flags), "=r" (tmp) + : "i" (PIL_NORMAL_MAX) + : "memory" + ); + + return flags; +} + +#endif /* (__ASSEMBLY__) */ + +#endif /* !(_ASM_IRQFLAGS_H) */ |