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| author | Paul Mackerras <paulus@samba.org> | 2005-11-10 12:00:55 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2005-11-10 12:00:55 +1100 |
| commit | a23414beb6607dfd40d3245f7df9dd97a4e2c82b (patch) | |
| tree | 7fb2e368a462fab4ce4cc275281ecd22e284653a /arch/powerpc/platforms | |
| parent | 8b553f32db3bf5d0ec0819c595932eb21cd45945 (diff) | |
| download | op-kernel-dev-a23414beb6607dfd40d3245f7df9dd97a4e2c82b.zip op-kernel-dev-a23414beb6607dfd40d3245f7df9dd97a4e2c82b.tar.gz | |
ppc/powerpc: workarounds for old Open Firmware versions
This adds code to work around some problems with old versions of
Open Firmware, such as on the early powermacs (7500 etc.) and the
"Longtrail" CHRP machine. On these machines we have to claim
the physical and virtual address ranges explicitly when claiming
memory and then set up a V->P mapping.
The Longtrail has more problems: setprop doesn't work, and we have
to set an "allow-reclaim" variable to 0 in order to get claim on
physical memory ranges to fail if the memory is already claimed.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/platforms')
| -rw-r--r-- | arch/powerpc/platforms/chrp/setup.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/chrp/setup.c b/arch/powerpc/platforms/chrp/setup.c index ecd32d5..4099dda 100644 --- a/arch/powerpc/platforms/chrp/setup.c +++ b/arch/powerpc/platforms/chrp/setup.c @@ -361,7 +361,9 @@ static void __init chrp_find_openpic(void) printk(KERN_INFO "OpenPIC at %lx\n", opaddr); irq_count = NR_IRQS - NUM_ISA_INTERRUPTS - 4; /* leave room for IPIs */ - prom_get_irq_senses(init_senses, NUM_8259_INTERRUPTS, NR_IRQS - 4); + prom_get_irq_senses(init_senses, NUM_ISA_INTERRUPTS, NR_IRQS - 4); + /* i8259 cascade is always positive level */ + init_senses[0] = IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE; iranges = (unsigned int *) get_property(np, "interrupt-ranges", &len); if (iranges == NULL) |
