diff options
Diffstat (limited to 'arch/sh/oprofile/op_model_sh7750.c')
| -rw-r--r-- | arch/sh/oprofile/op_model_sh7750.c | 255 |
1 files changed, 0 insertions, 255 deletions
diff --git a/arch/sh/oprofile/op_model_sh7750.c b/arch/sh/oprofile/op_model_sh7750.c deleted file mode 100644 index c892c7c30c2..00000000000 --- a/arch/sh/oprofile/op_model_sh7750.c +++ /dev/null @@ -1,255 +0,0 @@ -/* - * arch/sh/oprofile/op_model_sh7750.c - * - * OProfile support for SH7750/SH7750S Performance Counters - * - * 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 - * for more details. - */ -#include <linux/kernel.h> -#include <linux/oprofile.h> -#include <linux/profile.h> -#include <linux/init.h> -#include <linux/errno.h> -#include <linux/interrupt.h> -#include <linux/io.h> -#include <linux/fs.h> -#include "op_impl.h" - -#define PM_CR_BASE 0xff000084 /* 16-bit */ -#define PM_CTR_BASE 0xff100004 /* 32-bit */ - -#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_CLKF 0x00000100 -#define PMCR_PMCLR 0x00002000 -#define PMCR_PMST 0x00004000 -#define PMCR_PMEN 0x00008000 - -struct op_sh_model op_model_sh7750_ops; - -#define NR_CNTRS 2 - -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). - * Since we have 2 counters, each counter will take the event code as it - * corresponds to the PMCR PMM setting. Each counter can be configured - * independently. - * - * Event Code Description - * ---------- ----------- - * - * 0x01 Operand read access - * 0x02 Operand write access - * 0x03 UTLB miss - * 0x04 Operand cache read miss - * 0x05 Operand cache write miss - * 0x06 Instruction fetch (w/ cache) - * 0x07 Instruction TLB miss - * 0x08 Instruction cache miss - * 0x09 All operand accesses - * 0x0a All instruction accesses - * 0x0b OC RAM operand access - * 0x0d On-chip I/O space access - * 0x0e Operand access (r/w) - * 0x0f Operand cache miss (r/w) - * 0x10 Branch instruction - * 0x11 Branch taken - * 0x12 BSR/BSRF/JSR - * 0x13 Instruction execution - * 0x14 Instruction execution in parallel - * 0x15 FPU Instruction execution - * 0x16 Interrupt - * 0x17 NMI - * 0x18 trapa instruction execution - * 0x19 UBCA match - * 0x1a UBCB match - * 0x21 Instruction cache fill - * 0x22 Operand cache fill - * 0x23 Elapsed time - * 0x24 Pipeline freeze by I-cache miss - * 0x25 Pipeline freeze by D-cache miss - * 0x27 Pipeline freeze by branch instruction - * 0x28 Pipeline freeze by CPU register - * 0x29 Pipeline freeze by FPU - * - * Unfortunately we don't have a native exception or interrupt for counter - * overflow (although since these counters can run for 16.3 days without - * overflowing, it's not really necessary). - * - * OProfile on the other hand likes to have samples taken periodically, so - * for now we just piggyback the timer interrupt to get the expected - * behavior. - */ - -static int sh7750_timer_notify(struct pt_regs *regs) -{ - oprofile_add_sample(regs, 0); - return 0; -} - -static u64 sh7750_read_counter(int counter) -{ - return (u64)((u64)(__raw_readl(PMCTRH(counter)) & 0xffff) << 32) | - __raw_readl(PMCTRL(counter)); -} - -/* - * Files will be in a path like: - * - * /<oprofilefs mount point>/<counter number>/<file> - * - * So when dealing with <file>, we look to the parent dentry for the counter - * number. - */ -static inline int to_counter(struct file *file) -{ - const unsigned char *name = file->f_path.dentry->d_parent->d_name.name; - - return (int)simple_strtol(name, NULL, 10); -} - -/* - * XXX: We have 48-bit counters, so we're probably going to want something - * more along the lines of oprofilefs_ullong_to_user().. Truncating to - * unsigned long works fine for now though, as long as we don't attempt to - * profile for too horribly long. - */ -static ssize_t sh7750_read_count(struct file *file, char __user *buf, - size_t count, loff_t *ppos) -{ - int counter = to_counter(file); - u64 val = sh7750_read_counter(counter); - - return oprofilefs_ulong_to_user((unsigned long)val, buf, count, ppos); -} - -static ssize_t sh7750_write_count(struct file *file, const char __user *buf, - size_t count, loff_t *ppos) -{ - int counter = to_counter(file); - unsigned long val; - - if (oprofilefs_ulong_from_user(&val, buf, count)) - return -EFAULT; - - /* - * Any write will clear the counter, although only 0 should be - * written for this purpose, as we do not support setting the - * counter to an arbitrary value. - */ - WARN_ON(val != 0); - - __raw_writew(__raw_readw(PMCR(counter)) | PMCR_PMCLR, PMCR(counter)); - - return count; -} - -static const struct file_operations count_fops = { - .read = sh7750_read_count, - .write = sh7750_write_count, -}; - -static int sh7750_ppc_create_files(struct super_block *sb, struct dentry *dir) -{ - return oprofilefs_create_file(sb, dir, "count", &count_fops); -} - -static void sh7750_ppc_reg_setup(struct op_counter_config *ctr) -{ - unsigned int counters = op_model_sh7750_ops.num_counters; - int i; - - for (i = 0; i < counters; i++) { - regcache[i].ctrl = 0; - regcache[i].cnt_hi = 0; - regcache[i].cnt_lo = 0; - - if (!ctr[i].enabled) - continue; - - 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); - } -} - -static void sh7750_ppc_cpu_setup(void *args) -{ - unsigned int counters = op_model_sh7750_ops.num_counters; - int i; - - 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)); - } -} - -static void sh7750_ppc_cpu_start(void *args) -{ - unsigned int counters = op_model_sh7750_ops.num_counters; - int i; - - for (i = 0; i < counters; i++) - __raw_writew(regcache[i].ctrl, PMCR(i)); -} - -static void sh7750_ppc_cpu_stop(void *args) -{ - unsigned int counters = op_model_sh7750_ops.num_counters; - int i; - - /* Disable the counters */ - for (i = 0; i < counters; i++) - __raw_writew(__raw_readw(PMCR(i)) & ~PMCR_PMEN, PMCR(i)); -} - -static inline void sh7750_ppc_reset(void) -{ - unsigned int counters = op_model_sh7750_ops.num_counters; - int i; - - /* Clear the counters */ - for (i = 0; i < counters; i++) - __raw_writew(__raw_readw(PMCR(i)) | PMCR_PMCLR, PMCR(i)); -} - -static int sh7750_ppc_init(void) -{ - sh7750_ppc_reset(); - - return register_timer_hook(sh7750_timer_notify); -} - -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, -}; |