diff options
| author | Kevin D. Kissell <kevink@mips.com> | 2007-07-12 11:21:08 -0400 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2007-07-12 12:41:17 -0400 |
| commit | 0db34215c7e0ef618e7b29fbf271194ca5434f8e (patch) | |
| tree | 261d8cd77fad2d661157ee5e5bde8e3fdc8c96b9 /include | |
| parent | bd0765098bf22eb8b1319f649a4c3301b40ec04c (diff) | |
[MIPS] SMTC: Interrupt mask backstop hack
To support multiple TC microthreads acting as "CPUs" within a VPE,
VPE-wide interrupt mask bits must be specially manipulated during
interrupt handling. To support legacy drivers and interrupt controller
management code, SMTC has a "backstop" to track and if necessary restore
the interrupt mask. This has some performance impact on interrupt service
overhead. Disable it only if you know what you are doing.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-mips/irq.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/asm-mips/irq.h b/include/asm-mips/irq.h index 3ca6a076124d..97102ebc54b1 100644 --- a/include/asm-mips/irq.h +++ b/include/asm-mips/irq.h | |||
| @@ -24,7 +24,7 @@ static inline int irq_canonicalize(int irq) | |||
| 24 | #define irq_canonicalize(irq) (irq) /* Sane hardware, sane code ... */ | 24 | #define irq_canonicalize(irq) (irq) /* Sane hardware, sane code ... */ |
| 25 | #endif | 25 | #endif |
| 26 | 26 | ||
| 27 | #ifdef CONFIG_MIPS_MT_SMTC | 27 | #ifdef CONFIG_MIPS_MT_SMTC_IM_BACKSTOP |
| 28 | /* | 28 | /* |
| 29 | * Clear interrupt mask handling "backstop" if irq_hwmask | 29 | * Clear interrupt mask handling "backstop" if irq_hwmask |
| 30 | * entry so indicates. This implies that the ack() or end() | 30 | * entry so indicates. This implies that the ack() or end() |