1/* 2 * header file for hardware trace functions 3 * 4 * Copyright 2007-2008 Analog Devices Inc. 5 * 6 * Licensed under the GPL-2 or later. 7 */ 8 9#ifndef _BLACKFIN_TRACE_ 10#define _BLACKFIN_TRACE_ 11 12/* Normally, we use ON, but you can't turn on software expansion until 13 * interrupts subsystem is ready 14 */ 15 16#define BFIN_TRACE_INIT ((CONFIG_DEBUG_BFIN_HWTRACE_COMPRESSION << 4) | 0x03) 17#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND 18#define BFIN_TRACE_ON (BFIN_TRACE_INIT | (CONFIG_DEBUG_BFIN_HWTRACE_EXPAND << 2)) 19#else 20#define BFIN_TRACE_ON (BFIN_TRACE_INIT) 21#endif 22 23#ifndef __ASSEMBLY__ 24extern unsigned long trace_buff_offset; 25extern unsigned long software_trace_buff[]; 26#if defined(CONFIG_DEBUG_VERBOSE) 27extern void decode_address(char *buf, unsigned long address); 28extern bool get_instruction(unsigned int *val, unsigned short *address); 29#else 30static inline void decode_address(char *buf, unsigned long address) { } 31static inline bool get_instruction(unsigned int *val, unsigned short *address) { return false; } 32#endif 33 34/* Trace Macros for C files */ 35 36#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON 37 38#define trace_buffer_init() bfin_write_TBUFCTL(BFIN_TRACE_INIT) 39 40#define trace_buffer_save(x) \ 41 do { \ 42 (x) = bfin_read_TBUFCTL(); \ 43 bfin_write_TBUFCTL((x) & ~TBUFEN); \ 44 } while (0) 45 46#define trace_buffer_restore(x) \ 47 do { \ 48 bfin_write_TBUFCTL((x)); \ 49 } while (0) 50#else /* DEBUG_BFIN_HWTRACE_ON */ 51 52#define trace_buffer_save(x) 53#define trace_buffer_restore(x) 54#endif /* CONFIG_DEBUG_BFIN_HWTRACE_ON */ 55 56#else 57/* Trace Macros for Assembly files */ 58 59#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON 60 61#define trace_buffer_stop(preg, dreg) \ 62 preg.L = LO(TBUFCTL); \ 63 preg.H = HI(TBUFCTL); \ 64 dreg = 0x1; \ 65 [preg] = dreg; 66 67#define trace_buffer_init(preg, dreg) \ 68 preg.L = LO(TBUFCTL); \ 69 preg.H = HI(TBUFCTL); \ 70 dreg = BFIN_TRACE_INIT; \ 71 [preg] = dreg; 72 73#define trace_buffer_save(preg, dreg) \ 74 preg.L = LO(TBUFCTL); \ 75 preg.H = HI(TBUFCTL); \ 76 dreg = [preg]; \ 77 [--sp] = dreg; \ 78 dreg = 0x1; \ 79 [preg] = dreg; 80 81#define trace_buffer_restore(preg, dreg) \ 82 preg.L = LO(TBUFCTL); \ 83 preg.H = HI(TBUFCTL); \ 84 dreg = [sp++]; \ 85 [preg] = dreg; 86 87#else /* CONFIG_DEBUG_BFIN_HWTRACE_ON */ 88 89#define trace_buffer_stop(preg, dreg) 90#define trace_buffer_init(preg, dreg) 91#define trace_buffer_save(preg, dreg) 92#define trace_buffer_restore(preg, dreg) 93 94#endif /* CONFIG_DEBUG_BFIN_HWTRACE_ON */ 95 96#ifdef CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE 97# define DEBUG_HWTRACE_SAVE(preg, dreg) trace_buffer_save(preg, dreg) 98# define DEBUG_HWTRACE_RESTORE(preg, dreg) trace_buffer_restore(preg, dreg) 99#else 100# define DEBUG_HWTRACE_SAVE(preg, dreg) 101# define DEBUG_HWTRACE_RESTORE(preg, dreg) 102#endif 103 104#endif /* __ASSEMBLY__ */ 105 106#endif /* _BLACKFIN_TRACE_ */ 107