projects / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| aa53233a SG |
1 | /* |
| 2 | * Copyright (c) 2014 Google, Inc. | |
| 3 | * | |
| 4 | * SPDX-License-Identifier: GPL-2.0+ | |
| 5 | */ | |
| 6 | ||
| 7 | #ifndef __IOTRACE_H | |
| 8 | #define __IOTRACE_H | |
| 9 | ||
| 10 | #include <linux/types.h> | |
| 11 | ||
| 12 | /* | |
| 13 | * This file is designed to be included in arch/<arch>/include/asm/io.h. | |
| 14 | * It redirects all IO access through a tracing/checksumming feature for | |
| 15 | * testing purposes. | |
| 16 | */ | |
| 17 | ||
| 18 | #if defined(CONFIG_IO_TRACE) && !defined(IOTRACE_IMPL) && \ | |
| 19 | !defined(CONFIG_SPL_BUILD) | |
| 20 | ||
| 21 | #undef readl | |
| 22 | #define readl(addr) iotrace_readl((const void *)(addr)) | |
| 23 | ||
| 24 | #undef writel | |
| 25 | #define writel(val, addr) iotrace_writel(val, (const void *)(addr)) | |
| 26 | ||
| 27 | #undef readw | |
| 28 | #define readw(addr) iotrace_readw((const void *)(addr)) | |
| 29 | ||
| 30 | #undef writew | |
| 31 | #define writew(val, addr) iotrace_writew(val, (const void *)(addr)) | |
| 32 | ||
| 33 | #undef readb | |
| 709e98b7 | 34 | #define readb(addr) iotrace_readb((const void *)(uintptr_t)addr) |
| aa53233a SG |
35 | |
| 36 | #undef writeb | |
| 709e98b7 SG |
37 | #define writeb(val, addr) \ |
| 38 | iotrace_writeb(val, (const void *)(uintptr_t)addr) | |
| aa53233a SG |
39 | |
| 40 | #endif | |
| 41 | ||
| 42 | /* Tracing functions which mirror their io.h counterparts */ | |
| 43 | u32 iotrace_readl(const void *ptr); | |
| 44 | void iotrace_writel(ulong value, const void *ptr); | |
| 45 | u16 iotrace_readw(const void *ptr); | |
| 46 | void iotrace_writew(ulong value, const void *ptr); | |
| 47 | u8 iotrace_readb(const void *ptr); | |
| 48 | void iotrace_writeb(ulong value, const void *ptr); | |
| 49 | ||
| 50 | /** | |
| 51 | * iotrace_reset_checksum() - Reset the iotrace checksum | |
| 52 | */ | |
| 53 | void iotrace_reset_checksum(void); | |
| 54 | ||
| 55 | /** | |
| 56 | * iotrace_get_checksum() - Get the current checksum value | |
| 57 | * | |
| 58 | * @return currect checksum value | |
| 59 | */ | |
| 60 | u32 iotrace_get_checksum(void); | |
| 61 | ||
| 62 | /** | |
| 63 | * iotrace_set_enabled() - Set whether iotracing is enabled or not | |
| 64 | * | |
| 65 | * This controls whether the checksum is updated and a trace record added | |
| 66 | * for each I/O access. | |
| 67 | * | |
| 68 | * @enable: true to enable iotracing, false to disable | |
| 69 | */ | |
| 70 | void iotrace_set_enabled(int enable); | |
| 71 | ||
| 72 | /** | |
| 73 | * iotrace_get_enabled() - Get whether iotracing is enabled or not | |
| 74 | * | |
| 75 | * @return true if enabled, false if disabled | |
| 76 | */ | |
| 77 | int iotrace_get_enabled(void); | |
| 78 | ||
| 79 | /** | |
| 80 | * iotrace_set_buffer() - Set position and size of iotrace buffer | |
| 81 | * | |
| 82 | * Defines where the iotrace buffer goes, and resets the output pointer to | |
| 83 | * the start of the buffer. | |
| 84 | * | |
| 85 | * The buffer can be 0 size in which case the checksum is updated but no | |
| 86 | * trace records are writen. If the buffer is exhausted, the offset will | |
| 87 | * continue to increase but not new data will be written. | |
| 88 | * | |
| 89 | * @start: Start address of buffer | |
| 90 | * @size: Size of buffer in bytes | |
| 91 | */ | |
| 92 | void iotrace_set_buffer(ulong start, ulong size); | |
| 93 | ||
| 94 | /** | |
| 95 | * iotrace_get_buffer() - Get buffer information | |
| 96 | * | |
| 97 | * @start: Returns start address of buffer | |
| 98 | * @size: Returns size of buffer in bytes | |
| 99 | * @offset: Returns the byte offset where the next output trace record will | |
| 100 | * @count: Returns the number of trace records recorded | |
| 101 | * be written (or would be if the buffer was large enough) | |
| 102 | */ | |
| 103 | void iotrace_get_buffer(ulong *start, ulong *size, ulong *offset, ulong *count); | |
| 104 | ||
| 105 | #endif /* __IOTRACE_H */ |