From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- include/linux/oprofile.h | 119 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 119 insertions(+) create mode 100644 include/linux/oprofile.h (limited to 'include/linux/oprofile.h') diff --git a/include/linux/oprofile.h b/include/linux/oprofile.h new file mode 100644 index 000000000000..559c4c38a9c7 --- /dev/null +++ b/include/linux/oprofile.h @@ -0,0 +1,119 @@ +/** + * @file oprofile.h + * + * API for machine-specific interrupts to interface + * to oprofile. + * + * @remark Copyright 2002 OProfile authors + * @remark Read the file COPYING + * + * @author John Levon + */ + +#ifndef OPROFILE_H +#define OPROFILE_H + +#include +#include +#include + +struct super_block; +struct dentry; +struct file_operations; +struct pt_regs; + +/* Operations structure to be filled in */ +struct oprofile_operations { + /* create any necessary configuration files in the oprofile fs. + * Optional. */ + int (*create_files)(struct super_block * sb, struct dentry * root); + /* Do any necessary interrupt setup. Optional. */ + int (*setup)(void); + /* Do any necessary interrupt shutdown. Optional. */ + void (*shutdown)(void); + /* Start delivering interrupts. */ + int (*start)(void); + /* Stop delivering interrupts. */ + void (*stop)(void); + /* Initiate a stack backtrace. Optional. */ + void (*backtrace)(struct pt_regs * const regs, unsigned int depth); + /* CPU identification string. */ + char * cpu_type; +}; + +/** + * One-time initialisation. *ops must be set to a filled-in + * operations structure. This is called even in timer interrupt + * mode so an arch can set a backtrace callback. + * + * If an error occurs, the fields should be left untouched. + */ +int oprofile_arch_init(struct oprofile_operations * ops); + +/** + * One-time exit/cleanup for the arch. + */ +void oprofile_arch_exit(void); + +/** + * Add a sample. This may be called from any context. Pass + * smp_processor_id() as cpu. + */ +void oprofile_add_sample(struct pt_regs * const regs, unsigned long event); + +/* Use this instead when the PC value is not from the regs. Doesn't + * backtrace. */ +void oprofile_add_pc(unsigned long pc, int is_kernel, unsigned long event); + +/* add a backtrace entry, to be called from the ->backtrace callback */ +void oprofile_add_trace(unsigned long eip); + + +/** + * Create a file of the given name as a child of the given root, with + * the specified file operations. + */ +int oprofilefs_create_file(struct super_block * sb, struct dentry * root, + char const * name, struct file_operations * fops); + +int oprofilefs_create_file_perm(struct super_block * sb, struct dentry * root, + char const * name, struct file_operations * fops, int perm); + +/** Create a file for read/write access to an unsigned long. */ +int oprofilefs_create_ulong(struct super_block * sb, struct dentry * root, + char const * name, ulong * val); + +/** Create a file for read-only access to an unsigned long. */ +int oprofilefs_create_ro_ulong(struct super_block * sb, struct dentry * root, + char const * name, ulong * val); + +/** Create a file for read-only access to an atomic_t. */ +int oprofilefs_create_ro_atomic(struct super_block * sb, struct dentry * root, + char const * name, atomic_t * val); + +/** create a directory */ +struct dentry * oprofilefs_mkdir(struct super_block * sb, struct dentry * root, + char const * name); + +/** + * Write the given asciz string to the given user buffer @buf, updating *offset + * appropriately. Returns bytes written or -EFAULT. + */ +ssize_t oprofilefs_str_to_user(char const * str, char __user * buf, size_t count, loff_t * offset); + +/** + * Convert an unsigned long value into ASCII and copy it to the user buffer @buf, + * updating *offset appropriately. Returns bytes written or -EFAULT. + */ +ssize_t oprofilefs_ulong_to_user(unsigned long val, char __user * buf, size_t count, loff_t * offset); + +/** + * Read an ASCII string for a number from a userspace buffer and fill *val on success. + * Returns 0 on success, < 0 on error. + */ +int oprofilefs_ulong_from_user(unsigned long * val, char const __user * buf, size_t count); + +/** lock for read/write safety */ +extern spinlock_t oprofilefs_lock; + +#endif /* OPROFILE_H */ -- cgit v1.2.2