*
* OProfile support for SH7750/SH7750S Performance Counters
*
- * Copyright (C) 2003, 2004 Paul Mundt
+ * Copyright (C) 2003 - 2008 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
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
+#include <linux/io.h>
#include <linux/fs.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
+#include "op_impl.h"
#define PM_CR_BASE 0xff000084 /* 16-bit */
#define PM_CTR_BASE 0xff100004 /* 32-bit */
-#define PMCR1 (PM_CR_BASE + 0x00)
-#define PMCR2 (PM_CR_BASE + 0x04)
-#define PMCTR1H (PM_CTR_BASE + 0x00)
-#define PMCTR1L (PM_CTR_BASE + 0x04)
-#define PMCTR2H (PM_CTR_BASE + 0x08)
-#define PMCTR2L (PM_CTR_BASE + 0x0c)
+#define PMCR(n) (PM_CR_BASE + ((n) * 0x04))
+#define PMCTRH(n) (PM_CTR_BASE + 0x00 + ((n) * 0x08))
+#define PMCTRL(n) (PM_CTR_BASE + 0x04 + ((n) * 0x08))
#define PMCR_PMM_MASK 0x0000003f
#define PMCR_PMST 0x00004000
#define PMCR_PMEN 0x00008000
-#define PMCR_ENABLE (PMCR_PMST | PMCR_PMEN)
+struct op_sh_model op_model_sh7750_ops;
-/*
- * SH7750/SH7750S have 2 perf counters
- */
#define NR_CNTRS 2
-struct op_counter_config {
- unsigned long enabled;
- unsigned long event;
- unsigned long count;
-
- /* Dummy values for userspace tool compliance */
- unsigned long kernel;
- unsigned long user;
- unsigned long unit_mask;
-};
-
-static struct op_counter_config ctr[NR_CNTRS];
+static struct sh7750_ppc_register_config {
+ unsigned int ctrl;
+ unsigned long cnt_hi;
+ unsigned long cnt_lo;
+} regcache[NR_CNTRS];
/*
* There are a number of events supported by each counter (33 in total).
static u64 sh7750_read_counter(int counter)
{
- u32 hi, lo;
-
- hi = (counter == 0) ? ctrl_inl(PMCTR1H) : ctrl_inl(PMCTR2H);
- lo = (counter == 0) ? ctrl_inl(PMCTR1L) : ctrl_inl(PMCTR2L);
-
- return (u64)((u64)(hi & 0xffff) << 32) | lo;
+ return (u64)((u64)(__raw_readl(PMCTRH(counter)) & 0xffff) << 32) |
+ __raw_readl(PMCTRL(counter));
}
/*
*/
WARN_ON(val != 0);
- if (counter == 0) {
- ctrl_outw(ctrl_inw(PMCR1) | PMCR_PMCLR, PMCR1);
- } else {
- ctrl_outw(ctrl_inw(PMCR2) | PMCR_PMCLR, PMCR2);
- }
+ __raw_writew(__raw_readw(PMCR(counter)) | PMCR_PMCLR, PMCR(counter));
return count;
}
.write = sh7750_write_count,
};
-static int sh7750_perf_counter_create_files(struct super_block *sb, struct dentry *root)
+static int sh7750_ppc_create_files(struct super_block *sb, struct dentry *dir)
{
- int i;
+ return oprofilefs_create_file(sb, dir, "count", &count_fops);
+}
- for (i = 0; i < NR_CNTRS; i++) {
- struct dentry *dir;
- char buf[4];
+static void sh7750_ppc_reg_setup(struct op_counter_config *ctr)
+{
+ unsigned int counters = op_model_sh7750_ops.num_counters;
+ int i;
- snprintf(buf, sizeof(buf), "%d", i);
- dir = oprofilefs_mkdir(sb, root, buf);
+ for (i = 0; i < counters; i++) {
+ regcache[i].ctrl = 0;
+ regcache[i].cnt_hi = 0;
+ regcache[i].cnt_lo = 0;
- oprofilefs_create_ulong(sb, dir, "enabled", &ctr[i].enabled);
- oprofilefs_create_ulong(sb, dir, "event", &ctr[i].event);
- oprofilefs_create_file(sb, dir, "count", &count_fops);
+ if (!ctr[i].enabled)
+ continue;
- /* Dummy entries */
- oprofilefs_create_ulong(sb, dir, "kernel", &ctr[i].kernel);
- oprofilefs_create_ulong(sb, dir, "user", &ctr[i].user);
- oprofilefs_create_ulong(sb, dir, "unit_mask", &ctr[i].unit_mask);
+ regcache[i].ctrl |= ctr[i].event | PMCR_PMEN | PMCR_PMST;
+ regcache[i].cnt_hi = (unsigned long)((ctr->count >> 32) & 0xffff);
+ regcache[i].cnt_lo = (unsigned long)(ctr->count & 0xffffffff);
}
-
- return 0;
}
-static int sh7750_perf_counter_start(void)
+static void sh7750_ppc_cpu_setup(void *args)
{
- u16 pmcr;
-
- /* Enable counter 1 */
- if (ctr[0].enabled) {
- pmcr = ctrl_inw(PMCR1);
- WARN_ON(pmcr & PMCR_PMEN);
-
- pmcr &= ~PMCR_PMM_MASK;
- pmcr |= ctr[0].event;
- ctrl_outw(pmcr | PMCR_ENABLE, PMCR1);
- }
-
- /* Enable counter 2 */
- if (ctr[1].enabled) {
- pmcr = ctrl_inw(PMCR2);
- WARN_ON(pmcr & PMCR_PMEN);
+ unsigned int counters = op_model_sh7750_ops.num_counters;
+ int i;
- pmcr &= ~PMCR_PMM_MASK;
- pmcr |= ctr[1].event;
- ctrl_outw(pmcr | PMCR_ENABLE, PMCR2);
+ for (i = 0; i < counters; i++) {
+ __raw_writew(0, PMCR(i));
+ __raw_writel(regcache[i].cnt_hi, PMCTRH(i));
+ __raw_writel(regcache[i].cnt_lo, PMCTRL(i));
}
-
- return register_timer_hook(sh7750_timer_notify);
}
-static void sh7750_perf_counter_stop(void)
+static void sh7750_ppc_cpu_start(void *args)
{
- ctrl_outw(ctrl_inw(PMCR1) & ~PMCR_PMEN, PMCR1);
- ctrl_outw(ctrl_inw(PMCR2) & ~PMCR_PMEN, PMCR2);
+ unsigned int counters = op_model_sh7750_ops.num_counters;
+ int i;
- unregister_timer_hook(sh7750_timer_notify);
+ for (i = 0; i < counters; i++)
+ __raw_writew(regcache[i].ctrl, PMCR(i));
}
-static struct oprofile_operations sh7750_perf_counter_ops = {
- .create_files = sh7750_perf_counter_create_files,
- .start = sh7750_perf_counter_start,
- .stop = sh7750_perf_counter_stop,
-};
-
-int __init oprofile_arch_init(struct oprofile_operations *ops)
+static void sh7750_ppc_cpu_stop(void *args)
{
- if (!(current_cpu_data.flags & CPU_HAS_PERF_COUNTER))
- return -ENODEV;
+ unsigned int counters = op_model_sh7750_ops.num_counters;
+ int i;
- ops = &sh7750_perf_counter_ops;
- ops->cpu_type = "sh/sh7750";
+ /* Disable the counters */
+ for (i = 0; i < counters; i++)
+ __raw_writew(__raw_readw(PMCR(i)) & ~PMCR_PMEN, PMCR(i));
+}
- printk(KERN_INFO "oprofile: using SH-4 performance monitoring.\n");
+static inline void sh7750_ppc_reset(void)
+{
+ unsigned int counters = op_model_sh7750_ops.num_counters;
+ int i;
/* Clear the counters */
- ctrl_outw(ctrl_inw(PMCR1) | PMCR_PMCLR, PMCR1);
- ctrl_outw(ctrl_inw(PMCR2) | PMCR_PMCLR, PMCR2);
+ for (i = 0; i < counters; i++)
+ __raw_writew(__raw_readw(PMCR(i)) | PMCR_PMCLR, PMCR(i));
+}
- return 0;
+static int sh7750_ppc_init(void)
+{
+ sh7750_ppc_reset();
+
+ return register_timer_hook(sh7750_timer_notify);
}
-void oprofile_arch_exit(void)
+static void sh7750_ppc_exit(void)
{
+ unregister_timer_hook(sh7750_timer_notify);
+
+ sh7750_ppc_reset();
}
+
+struct op_sh_model op_model_sh7750_ops = {
+ .cpu_type = "sh/sh7750",
+ .num_counters = NR_CNTRS,
+ .reg_setup = sh7750_ppc_reg_setup,
+ .cpu_setup = sh7750_ppc_cpu_setup,
+ .cpu_start = sh7750_ppc_cpu_start,
+ .cpu_stop = sh7750_ppc_cpu_stop,
+ .init = sh7750_ppc_init,
+ .exit = sh7750_ppc_exit,
+ .create_files = sh7750_ppc_create_files,
+};
git.samba.org / sfrench / cifs-2.6.git / blobdiff