diff options
| author | Matt Redfearn <matt.redfearn@imgtec.com> | 2016-12-19 09:20:56 -0500 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2017-01-03 10:34:34 -0500 |
| commit | fe8bd18ffea5327344d4ec2bf11f47951212abd0 (patch) | |
| tree | 928a7f758616975d5cc5b66512aa24939c3e9e3f /arch/mips/include | |
| parent | ae2f5e5ed04a17c1aa1f0a3714c725e12c21d2a9 (diff) | |
MIPS: Introduce irq_stack
Allocate a per-cpu irq stack for use within interrupt handlers.
Also add a utility function on_irq_stack to determine if a given stack
pointer is within the irq stack for that cpu.
Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
Acked-by: Jason A. Donenfeld <jason@zx2c4.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Aaron Tomlin <atomlin@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14740/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include')
| -rw-r--r-- | arch/mips/include/asm/irq.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/mips/include/asm/irq.h b/arch/mips/include/asm/irq.h index 6bf10e796553..956db6e201d1 100644 --- a/arch/mips/include/asm/irq.h +++ b/arch/mips/include/asm/irq.h | |||
| @@ -17,6 +17,18 @@ | |||
| 17 | 17 | ||
| 18 | #include <irq.h> | 18 | #include <irq.h> |
| 19 | 19 | ||
| 20 | #define IRQ_STACK_SIZE THREAD_SIZE | ||
| 21 | |||
| 22 | extern void *irq_stack[NR_CPUS]; | ||
| 23 | |||
| 24 | static inline bool on_irq_stack(int cpu, unsigned long sp) | ||
| 25 | { | ||
| 26 | unsigned long low = (unsigned long)irq_stack[cpu]; | ||
| 27 | unsigned long high = low + IRQ_STACK_SIZE; | ||
| 28 | |||
| 29 | return (low <= sp && sp <= high); | ||
| 30 | } | ||
| 31 | |||
| 20 | #ifdef CONFIG_I8259 | 32 | #ifdef CONFIG_I8259 |
| 21 | static inline int irq_canonicalize(int irq) | 33 | static inline int irq_canonicalize(int irq) |
| 22 | { | 34 | { |