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powerpc: Expose PMCs & cache topology in sysfs on 32-bit

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The file arch/powerpc/kernel/sysfs.c is currently only compiled for
64-bit kernels.  It contain code to register CPU sysdevs in sysfs and
add various properties such as cache topology and raw access by root
to performance monitor counters (PMCs).  A lot of that can be re-used
as is on 32-bits.

This makes the file be built for both, with appropriate ifdef'ing
for the few bits that are really 64-bit specific, and adds some
support for the raw PMCs for 75x and 74xx processors.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Benjamin Herrenschmidt
2008-08-18 14:23:51 +10:00
committed by Paul Mackerras
parent 41eba0ad00
commit b950bdd0fc
6 changed files with 117 additions and 33 deletions
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4
arch/powerpc/oprofile/op_model_power4.c
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@@ -64,7 +64,7 @@ static int power4_reg_setup(struct op_counter_config *ctr,
return 0;
}
extern void ppc64_enable_pmcs(void);
extern void ppc_enable_pmcs(void);
/*
* Older CPUs require the MMCRA sample bit to be always set, but newer
@@ -91,7 +91,7 @@ static int power4_cpu_setup(struct op_counter_config *ctr)
unsigned int mmcr0 = mmcr0_val;
unsigned long mmcra = mmcra_val;
ppc64_enable_pmcs();
ppc_enable_pmcs();
/* set the freeze bit */
mmcr0 |= MMCR0_FC;