1 #ifndef _LINUX_MMIOTRACE_H
2 #define _LINUX_MMIOTRACE_H
4 #include <linux/types.h>
5 #include <linux/list.h>
10 typedef void (*kmmio_pre_handler_t)(struct kmmio_probe *,
11 struct pt_regs *, unsigned long addr);
12 typedef void (*kmmio_post_handler_t)(struct kmmio_probe *,
13 unsigned long condition, struct pt_regs *);
16 /* kmmio internal list: */
17 struct list_head list;
18 /* start location of the probe point: */
20 /* length of the probe region: */
22 /* Called before addr is executed: */
23 kmmio_pre_handler_t pre_handler;
24 /* Called after addr is executed: */
25 kmmio_post_handler_t post_handler;
29 extern unsigned int kmmio_count;
31 extern int register_kmmio_probe(struct kmmio_probe *p);
32 extern void unregister_kmmio_probe(struct kmmio_probe *p);
33 extern int kmmio_init(void);
34 extern void kmmio_cleanup(void);
36 #ifdef CONFIG_MMIOTRACE
37 /* kmmio is active by some kmmio_probes? */
38 static inline int is_kmmio_active(void)
43 /* Called from page fault handler. */
44 extern int kmmio_handler(struct pt_regs *regs, unsigned long addr);
46 /* Called from ioremap.c */
47 extern void mmiotrace_ioremap(resource_size_t offset, unsigned long size,
49 extern void mmiotrace_iounmap(volatile void __iomem *addr);
51 /* For anyone to insert markers. Remember trailing newline. */
52 extern int mmiotrace_printk(const char *fmt, ...)
53 __attribute__ ((format (printf, 1, 2)));
54 #else /* !CONFIG_MMIOTRACE: */
55 static inline int is_kmmio_active(void)
60 static inline int kmmio_handler(struct pt_regs *regs, unsigned long addr)
65 static inline void mmiotrace_ioremap(resource_size_t offset,
66 unsigned long size, void __iomem *addr)
70 static inline void mmiotrace_iounmap(volatile void __iomem *addr)
74 static inline int mmiotrace_printk(const char *fmt, ...)
75 __attribute__ ((format (printf, 1, 0)));
77 static inline int mmiotrace_printk(const char *fmt, ...)
81 #endif /* CONFIG_MMIOTRACE */
84 MMIO_READ = 0x1, /* struct mmiotrace_rw */
85 MMIO_WRITE = 0x2, /* struct mmiotrace_rw */
86 MMIO_PROBE = 0x3, /* struct mmiotrace_map */
87 MMIO_UNPROBE = 0x4, /* struct mmiotrace_map */
88 MMIO_UNKNOWN_OP = 0x5, /* struct mmiotrace_rw */
92 resource_size_t phys; /* PCI address of register */
94 unsigned long pc; /* optional program counter */
96 unsigned char opcode; /* one of MMIO_{READ,WRITE,UNKNOWN_OP} */
97 unsigned char width; /* size of register access in bytes */
100 struct mmiotrace_map {
101 resource_size_t phys; /* base address in PCI space */
102 unsigned long virt; /* base virtual address */
103 unsigned long len; /* mapping size */
105 unsigned char opcode; /* MMIO_PROBE or MMIO_UNPROBE */
108 /* in kernel/trace/trace_mmiotrace.c */
109 extern void enable_mmiotrace(void);
110 extern void disable_mmiotrace(void);
111 extern void mmio_trace_rw(struct mmiotrace_rw *rw);
112 extern void mmio_trace_mapping(struct mmiotrace_map *map);
113 extern int mmio_trace_printk(const char *fmt, va_list args);
115 #endif /* _LINUX_MMIOTRACE_H */