Merge commit 'linus/master' into x86/urgent

1 files changed, 269 insertions, 0 deletions

diff --git a/arch/sh/kernel/cpu/sh4a/perf_event.c b/arch/sh/kernel/cpu/sh4a/perf_event.c
new file mode 100644
index 000000000000..eddc21973fa1
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh4a/perf_event.c
@@ -0,0 +1,269 @@
+/*
+ * Performance events support for SH-4A performance counters
+ *
+ *  Copyright (C) 2009  Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/perf_event.h>
+#include <asm/processor.h>
+
+#define PPC_CCBR(idx)   (0xff200800 + (sizeof(u32) * idx))
+#define PPC_PMCTR(idx)  (0xfc100000 + (sizeof(u32) * idx))
+
+#define CCBR_CIT_MASK   (0x7ff << 6)
+#define CCBR_DUC        (1 << 3)
+#define CCBR_CMDS       (1 << 1)
+#define CCBR_PPCE       (1 << 0)
+
+#define PPC_PMCAT       0xfc100080
+
+#define PMCAT_OVF3      (1 << 27)
+#define PMCAT_CNN3      (1 << 26)
+#define PMCAT_CLR3      (1 << 25)
+#define PMCAT_OVF2      (1 << 19)
+#define PMCAT_CLR2      (1 << 17)
+#define PMCAT_OVF1      (1 << 11)
+#define PMCAT_CNN1      (1 << 10)
+#define PMCAT_CLR1      (1 << 9)
+#define PMCAT_OVF0      (1 << 3)
+#define PMCAT_CLR0      (1 << 1)
+
+static struct sh_pmu sh4a_pmu;
+
+/*
+ * Supported raw event codes:
+ *
+ *      Event Code      Description
+ *      ----------      -----------
+ *
+ *      0x0000          number of elapsed cycles
+ *      0x0200          number of elapsed cycles in privileged mode
+ *      0x0280          number of elapsed cycles while SR.BL is asserted
+ *      0x0202          instruction execution
+ *      0x0203          instruction execution in parallel
+ *      0x0204          number of unconditional branches
+ *      0x0208          number of exceptions
+ *      0x0209          number of interrupts
+ *      0x0220          UTLB miss caused by instruction fetch
+ *      0x0222          UTLB miss caused by operand access
+ *      0x02a0          number of ITLB misses
+ *      0x0028          number of accesses to instruction memories
+ *      0x0029          number of accesses to instruction cache
+ *      0x002a          instruction cache miss
+ *      0x022e          number of access to instruction X/Y memory
+ *      0x0030          number of reads to operand memories
+ *      0x0038          number of writes to operand memories
+ *      0x0031          number of operand cache read accesses
+ *      0x0039          number of operand cache write accesses
+ *      0x0032          operand cache read miss
+ *      0x003a          operand cache write miss
+ *      0x0236          number of reads to operand X/Y memory
+ *      0x023e          number of writes to operand X/Y memory
+ *      0x0237          number of reads to operand U memory
+ *      0x023f          number of writes to operand U memory
+ *      0x0337          number of U memory read buffer misses
+ *      0x02b4          number of wait cycles due to operand read access
+ *      0x02bc          number of wait cycles due to operand write access
+ *      0x0033          number of wait cycles due to operand cache read miss
+ *      0x003b          number of wait cycles due to operand cache write miss
+ */
+
+/*
+ * Special reserved bits used by hardware emulators, read values will
+ * vary, but writes must always be 0.
+ */
+#define PMCAT_EMU_CLR_MASK      ((1 << 24) | (1 << 16) | (1 << 8) | (1 << 0))
+
+static const int sh4a_general_events[] = {
+        [PERF_COUNT_HW_CPU_CYCLES]              = 0x0000,
+        [PERF_COUNT_HW_INSTRUCTIONS]            = 0x0202,
+        [PERF_COUNT_HW_CACHE_REFERENCES]        = 0x0029,       /* I-cache */
+        [PERF_COUNT_HW_CACHE_MISSES]            = 0x002a,       /* I-cache */
+        [PERF_COUNT_HW_BRANCH_INSTRUCTIONS]     = 0x0204,
+        [PERF_COUNT_HW_BRANCH_MISSES]           = -1,
+        [PERF_COUNT_HW_BUS_CYCLES]              = -1,
+};
+
+#define C(x)    PERF_COUNT_HW_CACHE_##x
+
+static const int sh4a_cache_events
+                        [PERF_COUNT_HW_CACHE_MAX]
+                        [PERF_COUNT_HW_CACHE_OP_MAX]
+                        [PERF_COUNT_HW_CACHE_RESULT_MAX] =
+{
+        [ C(L1D) ] = {
+                [ C(OP_READ) ] = {
+                        [ C(RESULT_ACCESS) ] = 0x0031,
+                        [ C(RESULT_MISS)   ] = 0x0032,
+                },
+                [ C(OP_WRITE) ] = {
+                        [ C(RESULT_ACCESS) ] = 0x0039,
+                        [ C(RESULT_MISS)   ] = 0x003a,
+                },
+                [ C(OP_PREFETCH) ] = {
+                        [ C(RESULT_ACCESS) ] = 0,
+                        [ C(RESULT_MISS)   ] = 0,
+                },
+        },
+
+        [ C(L1I) ] = {
+                [ C(OP_READ) ] = {
+                        [ C(RESULT_ACCESS) ] = 0x0029,
+                        [ C(RESULT_MISS)   ] = 0x002a,
+                },
+                [ C(OP_WRITE) ] = {
+                        [ C(RESULT_ACCESS) ] = -1,
+                        [ C(RESULT_MISS)   ] = -1,
+                },
+                [ C(OP_PREFETCH) ] = {
+                        [ C(RESULT_ACCESS) ] = 0,
+                        [ C(RESULT_MISS)   ] = 0,
+                },
+        },
+
+        [ C(LL) ] = {
+                [ C(OP_READ) ] = {
+                        [ C(RESULT_ACCESS) ] = 0x0030,
+                        [ C(RESULT_MISS)   ] = 0,
+                },
+                [ C(OP_WRITE) ] = {
+                        [ C(RESULT_ACCESS) ] = 0x0038,
+                        [ C(RESULT_MISS)   ] = 0,
+                },
+                [ C(OP_PREFETCH) ] = {
+                        [ C(RESULT_ACCESS) ] = 0,
+                        [ C(RESULT_MISS)   ] = 0,
+                },
+        },
+
+        [ C(DTLB) ] = {
+                [ C(OP_READ) ] = {
+                        [ C(RESULT_ACCESS) ] = 0x0222,
+                        [ C(RESULT_MISS)   ] = 0x0220,
+                },
+                [ C(OP_WRITE) ] = {
+                        [ C(RESULT_ACCESS) ] = 0,
+                        [ C(RESULT_MISS)   ] = 0,
+                },
+                [ C(OP_PREFETCH) ] = {
+                        [ C(RESULT_ACCESS) ] = 0,
+                        [ C(RESULT_MISS)   ] = 0,
+                },
+        },
+
+        [ C(ITLB) ] = {
+                [ C(OP_READ) ] = {
+                        [ C(RESULT_ACCESS) ] = 0,
+                        [ C(RESULT_MISS)   ] = 0x02a0,
+                },
+                [ C(OP_WRITE) ] = {
+                        [ C(RESULT_ACCESS) ] = -1,
+                        [ C(RESULT_MISS)   ] = -1,
+                },
+                [ C(OP_PREFETCH) ] = {
+                        [ C(RESULT_ACCESS) ] = -1,
+                        [ C(RESULT_MISS)   ] = -1,
+                },
+        },
+
+        [ C(BPU) ] = {
+                [ C(OP_READ) ] = {
+                        [ C(RESULT_ACCESS) ] = -1,
+                        [ C(RESULT_MISS)   ] = -1,
+                },
+                [ C(OP_WRITE) ] = {
+                        [ C(RESULT_ACCESS) ] = -1,
+                        [ C(RESULT_MISS)   ] = -1,
+                },
+                [ C(OP_PREFETCH) ] = {
+                        [ C(RESULT_ACCESS) ] = -1,
+                        [ C(RESULT_MISS)   ] = -1,
+                },
+        },
+};
+
+static int sh4a_event_map(int event)
+{
+        return sh4a_general_events[event];
+}
+
+static u64 sh4a_pmu_read(int idx)
+{
+        return __raw_readl(PPC_PMCTR(idx));
+}
+
+static void sh4a_pmu_disable(struct hw_perf_event *hwc, int idx)
+{
+        unsigned int tmp;
+
+        tmp = __raw_readl(PPC_CCBR(idx));
+        tmp &= ~(CCBR_CIT_MASK | CCBR_DUC);
+        __raw_writel(tmp, PPC_CCBR(idx));
+}
+
+static void sh4a_pmu_enable(struct hw_perf_event *hwc, int idx)
+{
+        unsigned int tmp;
+
+        tmp = __raw_readl(PPC_PMCAT);
+        tmp &= ~PMCAT_EMU_CLR_MASK;
+        tmp |= idx ? PMCAT_CLR1 : PMCAT_CLR0;
+        __raw_writel(tmp, PPC_PMCAT);
+
+        tmp = __raw_readl(PPC_CCBR(idx));
+        tmp |= (hwc->config << 6) | CCBR_CMDS | CCBR_PPCE;
+        __raw_writel(tmp, PPC_CCBR(idx));
+
+        __raw_writel(__raw_readl(PPC_CCBR(idx)) | CCBR_DUC, PPC_CCBR(idx));
+}
+
+static void sh4a_pmu_disable_all(void)
+{
+        int i;
+
+        for (i = 0; i < sh4a_pmu.num_events; i++)
+                __raw_writel(__raw_readl(PPC_CCBR(i)) & ~CCBR_DUC, PPC_CCBR(i));
+}
+
+static void sh4a_pmu_enable_all(void)
+{
+        int i;
+
+        for (i = 0; i < sh4a_pmu.num_events; i++)
+                __raw_writel(__raw_readl(PPC_CCBR(i)) | CCBR_DUC, PPC_CCBR(i));
+}
+
+static struct sh_pmu sh4a_pmu = {
+        .name           = "SH-4A",
+        .num_events     = 2,
+        .event_map      = sh4a_event_map,
+        .max_events     = ARRAY_SIZE(sh4a_general_events),
+        .raw_event_mask = 0x3ff,
+        .cache_events   = &sh4a_cache_events,
+        .read           = sh4a_pmu_read,
+        .disable        = sh4a_pmu_disable,
+        .enable         = sh4a_pmu_enable,
+        .disable_all    = sh4a_pmu_disable_all,
+        .enable_all     = sh4a_pmu_enable_all,
+};
+
+static int __init sh4a_pmu_init(void)
+{
+        /*
+         * Make sure this CPU actually has perf counters.
+         */
+        if (!(boot_cpu_data.flags & CPU_HAS_PERF_COUNTER)) {
+                pr_notice("HW perf events unsupported, software events only.\n");
+                return -ENODEV;
+        }
+
+        return register_sh_pmu(&sh4a_pmu);
+}
+arch_initcall(sh4a_pmu_init);