diff options
| author | Kumar Gala | 2008-05-21 22:59:23 +0200 |
|---|---|---|
| committer | Paul Mackerras | 2008-05-23 07:27:26 +0200 |
| commit | 475ca391b490a683d66bf19999a8a7a24913f139 (patch) | |
| tree | e7818dcd25169b9d9c9ed35723b3cafd2be455fd | |
| parent | [POWERPC] Tweak VDSO linker script to avoid upsetting old binutils (diff) | |
| download | kernel-qcow2-linux-475ca391b490a683d66bf19999a8a7a24913f139.tar.gz kernel-qcow2-linux-475ca391b490a683d66bf19999a8a7a24913f139.tar.xz kernel-qcow2-linux-475ca391b490a683d66bf19999a8a7a24913f139.zip | |
[POWERPC] mpic: Deal with bogus NIRQ in Feature Reporting Register
Some chips (like the SoCs from Freescale) report the wrong value in NIRQ
and this causes issues if its doesn't match or exceed the value of
irq_count.
Add a flag that board code can set to just use irq_count instead of
FRR[NIRQ]. Eventually we'll add a device tree property with the number
of sources.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
| -rw-r--r-- | arch/powerpc/sysdev/mpic.c | 9 | ||||
| -rw-r--r-- | include/asm-powerpc/mpic.h | 2 |
2 files changed, 8 insertions, 3 deletions
diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c index 8619f2a3f1f6..466e2183e86c 100644 --- a/arch/powerpc/sysdev/mpic.c +++ b/arch/powerpc/sysdev/mpic.c @@ -1144,9 +1144,12 @@ struct mpic * __init mpic_alloc(struct device_node *node, mpic->num_cpus = ((greg_feature & MPIC_GREG_FEATURE_LAST_CPU_MASK) >> MPIC_GREG_FEATURE_LAST_CPU_SHIFT) + 1; if (isu_size == 0) - mpic->num_sources = - ((greg_feature & MPIC_GREG_FEATURE_LAST_SRC_MASK) - >> MPIC_GREG_FEATURE_LAST_SRC_SHIFT) + 1; + if (flags & MPIC_BROKEN_FRR_NIRQS) + mpic->num_sources = mpic->irq_count; + else + mpic->num_sources = + ((greg_feature & MPIC_GREG_FEATURE_LAST_SRC_MASK) + >> MPIC_GREG_FEATURE_LAST_SRC_SHIFT) + 1; /* Map the per-CPU registers */ for (i = 0; i < mpic->num_cpus; i++) { diff --git a/include/asm-powerpc/mpic.h b/include/asm-powerpc/mpic.h index 943c5a3fac8a..6802570f4240 100644 --- a/include/asm-powerpc/mpic.h +++ b/include/asm-powerpc/mpic.h @@ -353,6 +353,8 @@ struct mpic #define MPIC_ENABLE_MCK 0x00000200 /* Disable bias among target selection, spread interrupts evenly */ #define MPIC_NO_BIAS 0x00000400 +/* Ignore NIRQS as reported by FRR */ +#define MPIC_BROKEN_FRR_NIRQS 0x00000800 /* MPIC HW modification ID */ #define MPIC_REGSET_MASK 0xf0000000 |