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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 422 | giacomo | 1 | /** |
| 2 | * @file oprofile.h |
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| 3 | * |
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| 4 | * API for machine-specific interrupts to interface |
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| 5 | * to oprofile. |
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| 6 | * |
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| 7 | * @remark Copyright 2002 OProfile authors |
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| 8 | * @remark Read the file COPYING |
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| 9 | * |
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| 10 | * @author John Levon <levon@movementarian.org> |
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| 11 | */ |
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| 12 | |||
| 13 | #ifndef OPROFILE_H |
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| 14 | #define OPROFILE_H |
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| 15 | |||
| 16 | #include <linux/types.h> |
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| 17 | #include <linux/spinlock.h> |
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| 18 | #include <asm/atomic.h> |
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| 19 | |||
| 20 | struct super_block; |
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| 21 | struct dentry; |
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| 22 | struct file_operations; |
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| 23 | |||
| 24 | /* Operations structure to be filled in */ |
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| 25 | struct oprofile_operations { |
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| 26 | /* create any necessary configuration files in the oprofile fs. |
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| 27 | * Optional. */ |
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| 28 | int (*create_files)(struct super_block * sb, struct dentry * root); |
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| 29 | /* Do any necessary interrupt setup. Optional. */ |
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| 30 | int (*setup)(void); |
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| 31 | /* Do any necessary interrupt shutdown. Optional. */ |
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| 32 | void (*shutdown)(void); |
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| 33 | /* Start delivering interrupts. */ |
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| 34 | int (*start)(void); |
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| 35 | /* Stop delivering interrupts. */ |
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| 36 | void (*stop)(void); |
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| 37 | /* CPU identification string. */ |
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| 38 | char * cpu_type; |
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| 39 | }; |
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| 40 | |||
| 41 | /** |
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| 42 | * One-time initialisation. *ops must be set to a filled-in |
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| 43 | * operations structure. This is called even in timer interrupt |
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| 44 | * mode. |
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| 45 | * |
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| 46 | * Return 0 on success. |
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| 47 | */ |
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| 48 | int oprofile_arch_init(struct oprofile_operations ** ops); |
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| 49 | |||
| 50 | /** |
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| 51 | * One-time exit/cleanup for the arch. |
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| 52 | */ |
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| 53 | void oprofile_arch_exit(void); |
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| 54 | |||
| 55 | /** |
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| 56 | * Add a sample. This may be called from any context. Pass |
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| 57 | * smp_processor_id() as cpu. |
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| 58 | */ |
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| 59 | extern void oprofile_add_sample(unsigned long eip, unsigned int is_kernel, |
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| 60 | unsigned long event, int cpu); |
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| 61 | |||
| 62 | /** |
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| 63 | * Create a file of the given name as a child of the given root, with |
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| 64 | * the specified file operations. |
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| 65 | */ |
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| 66 | int oprofilefs_create_file(struct super_block * sb, struct dentry * root, |
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| 67 | char const * name, struct file_operations * fops); |
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| 68 | |||
| 69 | /** Create a file for read/write access to an unsigned long. */ |
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| 70 | int oprofilefs_create_ulong(struct super_block * sb, struct dentry * root, |
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| 71 | char const * name, ulong * val); |
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| 72 | |||
| 73 | /** Create a file for read-only access to an unsigned long. */ |
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| 74 | int oprofilefs_create_ro_ulong(struct super_block * sb, struct dentry * root, |
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| 75 | char const * name, ulong * val); |
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| 76 | |||
| 77 | /** Create a file for read-only access to an atomic_t. */ |
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| 78 | int oprofilefs_create_ro_atomic(struct super_block * sb, struct dentry * root, |
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| 79 | char const * name, atomic_t * val); |
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| 80 | |||
| 81 | /** create a directory */ |
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| 82 | struct dentry * oprofilefs_mkdir(struct super_block * sb, struct dentry * root, |
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| 83 | char const * name); |
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| 84 | |||
| 85 | /** |
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| 86 | * Write the given asciz string to the given user buffer @buf, updating *offset |
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| 87 | * appropriately. Returns bytes written or -EFAULT. |
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| 88 | */ |
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| 89 | ssize_t oprofilefs_str_to_user(char const * str, char * buf, size_t count, loff_t * offset); |
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| 90 | |||
| 91 | /** |
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| 92 | * Convert an unsigned long value into ASCII and copy it to the user buffer @buf, |
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| 93 | * updating *offset appropriately. Returns bytes written or -EFAULT. |
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| 94 | */ |
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| 95 | ssize_t oprofilefs_ulong_to_user(unsigned long val, char * buf, size_t count, loff_t * offset); |
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| 96 | |||
| 97 | /** |
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| 98 | * Read an ASCII string for a number from a userspace buffer and fill *val on success. |
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| 99 | * Returns 0 on success, < 0 on error. |
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| 100 | */ |
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| 101 | int oprofilefs_ulong_from_user(unsigned long * val, char const * buf, size_t count); |
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| 102 | |||
| 103 | /** lock for read/write safety */ |
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| 104 | extern spinlock_t oprofilefs_lock; |
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| 105 | |||
| 106 | #endif /* OPROFILE_H */ |