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[POWERPC] Add PMC type to cputable
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Add cputable entries for which type of PMC implementation the processor
has.

I've only filled in the current 64-bit processors, the unfilled default
value will have same behaviour as before so it can be done over time
as needed.

Also tidy up the dummy_perf implementation a bit, aggregating it into
one function with ifdefs instead of several.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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Olof Johansson authored and Paul Mackerras committed Feb 7, 2007
1 parent c69b767 commit 1bd2e5a
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Showing 3 changed files with 33 additions and 26 deletions.
17 changes: 17 additions & 0 deletions arch/powerpc/kernel/cputable.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -86,6 +86,7 @@ static struct cpu_spec cpu_specs[] = {
.icache_bsize = 128,
.dcache_bsize = 128,
.num_pmcs = 8,
.pmc_type = PPC_PMC_IBM,
.oprofile_cpu_type = "ppc64/power3",
.oprofile_type = PPC_OPROFILE_RS64,
.platform = "power3",
Expand All @@ -99,6 +100,7 @@ static struct cpu_spec cpu_specs[] = {
.icache_bsize = 128,
.dcache_bsize = 128,
.num_pmcs = 8,
.pmc_type = PPC_PMC_IBM,
.oprofile_cpu_type = "ppc64/power3",
.oprofile_type = PPC_OPROFILE_RS64,
.platform = "power3",
Expand All @@ -112,6 +114,7 @@ static struct cpu_spec cpu_specs[] = {
.icache_bsize = 128,
.dcache_bsize = 128,
.num_pmcs = 8,
.pmc_type = PPC_PMC_IBM,
.oprofile_cpu_type = "ppc64/rs64",
.oprofile_type = PPC_OPROFILE_RS64,
.platform = "rs64",
Expand All @@ -125,6 +128,7 @@ static struct cpu_spec cpu_specs[] = {
.icache_bsize = 128,
.dcache_bsize = 128,
.num_pmcs = 8,
.pmc_type = PPC_PMC_IBM,
.oprofile_cpu_type = "ppc64/rs64",
.oprofile_type = PPC_OPROFILE_RS64,
.platform = "rs64",
Expand All @@ -138,6 +142,7 @@ static struct cpu_spec cpu_specs[] = {
.icache_bsize = 128,
.dcache_bsize = 128,
.num_pmcs = 8,
.pmc_type = PPC_PMC_IBM,
.oprofile_cpu_type = "ppc64/rs64",
.oprofile_type = PPC_OPROFILE_RS64,
.platform = "rs64",
Expand All @@ -151,6 +156,7 @@ static struct cpu_spec cpu_specs[] = {
.icache_bsize = 128,
.dcache_bsize = 128,
.num_pmcs = 8,
.pmc_type = PPC_PMC_IBM,
.oprofile_cpu_type = "ppc64/rs64",
.oprofile_type = PPC_OPROFILE_RS64,
.platform = "rs64",
Expand All @@ -164,6 +170,7 @@ static struct cpu_spec cpu_specs[] = {
.icache_bsize = 128,
.dcache_bsize = 128,
.num_pmcs = 8,
.pmc_type = PPC_PMC_IBM,
.oprofile_cpu_type = "ppc64/power4",
.oprofile_type = PPC_OPROFILE_POWER4,
.platform = "power4",
Expand All @@ -177,6 +184,7 @@ static struct cpu_spec cpu_specs[] = {
.icache_bsize = 128,
.dcache_bsize = 128,
.num_pmcs = 8,
.pmc_type = PPC_PMC_IBM,
.oprofile_cpu_type = "ppc64/power4",
.oprofile_type = PPC_OPROFILE_POWER4,
.platform = "power4",
Expand All @@ -191,6 +199,7 @@ static struct cpu_spec cpu_specs[] = {
.icache_bsize = 128,
.dcache_bsize = 128,
.num_pmcs = 8,
.pmc_type = PPC_PMC_IBM,
.cpu_setup = __setup_cpu_ppc970,
.cpu_restore = __restore_cpu_ppc970,
.oprofile_cpu_type = "ppc64/970",
Expand All @@ -207,6 +216,7 @@ static struct cpu_spec cpu_specs[] = {
.icache_bsize = 128,
.dcache_bsize = 128,
.num_pmcs = 8,
.pmc_type = PPC_PMC_IBM,
.cpu_setup = __setup_cpu_ppc970,
.cpu_restore = __restore_cpu_ppc970,
.oprofile_cpu_type = "ppc64/970",
Expand Down Expand Up @@ -239,6 +249,7 @@ static struct cpu_spec cpu_specs[] = {
.icache_bsize = 128,
.dcache_bsize = 128,
.num_pmcs = 8,
.pmc_type = PPC_PMC_IBM,
.cpu_setup = __setup_cpu_ppc970,
.oprofile_cpu_type = "ppc64/970",
.oprofile_type = PPC_OPROFILE_POWER4,
Expand All @@ -253,6 +264,7 @@ static struct cpu_spec cpu_specs[] = {
.icache_bsize = 128,
.dcache_bsize = 128,
.num_pmcs = 6,
.pmc_type = PPC_PMC_IBM,
.oprofile_cpu_type = "ppc64/power5",
.oprofile_type = PPC_OPROFILE_POWER4,
/* SIHV / SIPR bits are implemented on POWER4+ (GQ)
Expand All @@ -271,6 +283,7 @@ static struct cpu_spec cpu_specs[] = {
.icache_bsize = 128,
.dcache_bsize = 128,
.num_pmcs = 6,
.pmc_type = PPC_PMC_IBM,
.oprofile_cpu_type = "ppc64/power5+",
.oprofile_type = PPC_OPROFILE_POWER4,
.oprofile_mmcra_sihv = MMCRA_SIHV,
Expand Down Expand Up @@ -321,6 +334,7 @@ static struct cpu_spec cpu_specs[] = {
.icache_bsize = 128,
.dcache_bsize = 128,
.num_pmcs = 6,
.pmc_type = PPC_PMC_IBM,
.oprofile_cpu_type = "ppc64/power6",
.oprofile_type = PPC_OPROFILE_POWER4,
.oprofile_mmcra_sihv = POWER6_MMCRA_SIHV,
Expand All @@ -340,6 +354,7 @@ static struct cpu_spec cpu_specs[] = {
.icache_bsize = 128,
.dcache_bsize = 128,
.num_pmcs = 4,
.pmc_type = PPC_PMC_IBM,
.oprofile_cpu_type = "ppc64/cell-be",
.oprofile_type = PPC_OPROFILE_CELL,
.platform = "ppc-cell-be",
Expand All @@ -353,6 +368,7 @@ static struct cpu_spec cpu_specs[] = {
.icache_bsize = 64,
.dcache_bsize = 64,
.num_pmcs = 6,
.pmc_type = PPC_PMC_PA6T,
.platform = "pa6t",
},
{ /* default match */
Expand All @@ -364,6 +380,7 @@ static struct cpu_spec cpu_specs[] = {
.icache_bsize = 128,
.dcache_bsize = 128,
.num_pmcs = 6,
.pmc_type = PPC_PMC_IBM,
.platform = "power4",
}
#endif /* CONFIG_PPC64 */
Expand Down
35 changes: 9 additions & 26 deletions arch/powerpc/kernel/pmc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -19,38 +19,21 @@
#include <asm/processor.h>
#include <asm/pmc.h>

#if defined(CONFIG_FSL_BOOKE) && !defined(CONFIG_E200)
static void dummy_perf(struct pt_regs *regs)
{
unsigned int pmgc0 = mfpmr(PMRN_PMGC0);

pmgc0 &= ~PMGC0_PMIE;
mtpmr(PMRN_PMGC0, pmgc0);
}
#elif defined(CONFIG_PPC64) || defined(CONFIG_6xx)

#ifndef MMCR0_PMAO
#define MMCR0_PMAO 0
#ifndef MMCR0_PMA0
#define MMCR0_PMA0 0
#endif

/* Ensure exceptions are disabled */
static void dummy_perf(struct pt_regs *regs)
{
unsigned int mmcr0 = mfspr(SPRN_MMCR0);

mmcr0 &= ~(MMCR0_PMXE|MMCR0_PMAO);
mtspr(SPRN_MMCR0, mmcr0);
}
#if defined(CONFIG_FSL_BOOKE) && !defined(CONFIG_E200)
mtpmr(PMRN_PMGC0, mfpmr(PMRN_PMGC0) & ~PMGC0_PMIE);
#elif defined(CONFIG_PPC64) || defined(CONFIG_6xx)
mtspr(SPRN_MMCR0, mfspr(SPRN_MMCR0) & ~(MMCR0_PMXE|MMCR0_PMA0));
#else
/* Ensure exceptions are disabled */
static void dummy_perf(struct pt_regs *regs)
{
unsigned int mmcr0 = mfspr(SPRN_MMCR0);

mmcr0 &= ~(MMCR0_PMXE);
mtspr(SPRN_MMCR0, mmcr0);
}
mtspr(SPRN_MMCR0, mfspr(SPRN_MMCR0) & ~MMCR0_PMXE);
#endif
}


static DEFINE_SPINLOCK(pmc_owner_lock);
static void *pmc_owner_caller; /* mostly for debugging */
Expand Down
7 changes: 7 additions & 0 deletions include/asm-powerpc/cputable.h
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Original file line number Diff line number Diff line change
Expand Up @@ -50,6 +50,12 @@ enum powerpc_oprofile_type {
PPC_OPROFILE_CELL = 5,
};

enum powerpc_pmc_type {
PPC_PMC_DEFAULT = 0,
PPC_PMC_IBM = 1,
PPC_PMC_PA6T = 2,
};

struct cpu_spec {
/* CPU is matched via (PVR & pvr_mask) == pvr_value */
unsigned int pvr_mask;
Expand All @@ -65,6 +71,7 @@ struct cpu_spec {

/* number of performance monitor counters */
unsigned int num_pmcs;
enum powerpc_pmc_type pmc_type;

/* this is called to initialize various CPU bits like L1 cache,
* BHT, SPD, etc... from head.S before branching to identify_machine
Expand Down

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