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authorMaynard Johnson <mpjohn@us.ibm.com>2007-02-13 22:02:03 +0100
committerArnd Bergmann <arnd@klappe.arndb.de>2007-02-13 22:03:07 +0100
commitc7eb734766217b9ddac217cbccae3aedcfa67520 (patch)
tree43019f359ce1b9194d59d42328f29919d3705d43 /arch/powerpc/oprofile/op_model_cell.c
parentbcb63e25ed3c56ee40cca4d18fbaac1d2a40c1d6 (diff)
downloadlinaro-lsk-c7eb734766217b9ddac217cbccae3aedcfa67520.tar.gz
[POWERPC] cell: pm_rtas_activat_signals routine cleanup
The code was setting up the debug bus for group 21 when profiling on the event PPU CYCLES. The debug bus is not actually used by the hardware performance counters when counting PPU CYCLES. Setting up the debug bus for PPU CYCLES causes signal routing conflicts on the debug bus when profiling PPU cycles and another PPU event. This patch fixes the code to only setup the debug bus to route the performance signals for the non PPU CYCLE events. Signed-off-by: Maynard Johnson <mpjohn@us.ibm.com> Signed-off-by: Carl Love <carll@us.ibm.com> Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Diffstat (limited to 'arch/powerpc/oprofile/op_model_cell.c')
-rw-r--r--arch/powerpc/oprofile/op_model_cell.c49
1 files changed, 33 insertions, 16 deletions
diff --git a/arch/powerpc/oprofile/op_model_cell.c b/arch/powerpc/oprofile/op_model_cell.c
index 8d4a9586464..e08e1d7b3dc 100644
--- a/arch/powerpc/oprofile/op_model_cell.c
+++ b/arch/powerpc/oprofile/op_model_cell.c
@@ -39,6 +39,9 @@
#include "../platforms/cell/interrupt.h"
#define PPU_CYCLES_EVENT_NUM 1 /* event number for CYCLES */
+#define PPU_CYCLES_GRP_NUM 1 /* special group number for identifying
+ * PPU_CYCLES event
+ */
#define CBE_COUNT_ALL_CYCLES 0x42800000 /* PPU cycle event specifier */
#define NUM_THREADS 2 /* number of physical threads in
@@ -62,7 +65,7 @@ struct pmc_cntrl_data {
struct pm_signal {
u16 cpu; /* Processor to modify */
u16 sub_unit; /* hw subunit this applies to (if applicable) */
- u16 signal_group; /* Signal Group to Enable/Disable */
+ short int signal_group; /* Signal Group to Enable/Disable */
u8 bus_word; /* Enable/Disable on this Trace/Trigger/Event
* Bus Word(s) (bitmask)
*/
@@ -179,26 +182,40 @@ static void pm_rtas_reset_signals(u32 node)
static void pm_rtas_activate_signals(u32 node, u32 count)
{
int ret;
- int j;
+ int i, j;
struct pm_signal pm_signal_local[NR_PHYS_CTRS];
+ /* There is no debug setup required for the cycles event.
+ * Note that only events in the same group can be used.
+ * Otherwise, there will be conflicts in correctly routing
+ * the signals on the debug bus. It is the responsiblity
+ * of the OProfile user tool to check the events are in
+ * the same group.
+ */
+ i = 0;
for (j = 0; j < count; j++) {
- /* fw expects physical cpu # */
- pm_signal_local[j].cpu = node;
- pm_signal_local[j].signal_group
- = pm_signal[j].signal_group;
- pm_signal_local[j].bus_word = pm_signal[j].bus_word;
- pm_signal_local[j].sub_unit = pm_signal[j].sub_unit;
- pm_signal_local[j].bit = pm_signal[j].bit;
+ if (pm_signal[j].signal_group != PPU_CYCLES_GRP_NUM) {
+
+ /* fw expects physical cpu # */
+ pm_signal_local[i].cpu = node;
+ pm_signal_local[i].signal_group
+ = pm_signal[j].signal_group;
+ pm_signal_local[i].bus_word = pm_signal[j].bus_word;
+ pm_signal_local[i].sub_unit = pm_signal[j].sub_unit;
+ pm_signal_local[i].bit = pm_signal[j].bit;
+ i++;
+ }
}
- ret = rtas_ibm_cbe_perftools(SUBFUNC_ACTIVATE, PASSTHRU_ENABLE,
- pm_signal_local,
- count * sizeof(struct pm_signal));
+ if (i != 0) {
+ ret = rtas_ibm_cbe_perftools(SUBFUNC_ACTIVATE, PASSTHRU_ENABLE,
+ pm_signal_local,
+ i * sizeof(struct pm_signal));
- if (ret)
- printk(KERN_WARNING "%s: rtas returned: %d\n",
- __FUNCTION__, ret);
+ if (ret)
+ printk(KERN_WARNING "%s: rtas returned: %d\n",
+ __FUNCTION__, ret);
+ }
}
/*
@@ -215,7 +232,7 @@ static void set_pm_event(u32 ctr, int event, u32 unit_mask)
/* Special Event: Count all cpu cycles */
pm_regs.pm07_cntrl[ctr] = CBE_COUNT_ALL_CYCLES;
p = &(pm_signal[ctr]);
- p->signal_group = 21;
+ p->signal_group = PPU_CYCLES_GRP_NUM;
p->bus_word = 1;
p->sub_unit = 0;
p->bit = 0;