projects / J-u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 11f4dc15 SG |
1 | /* |
| 2 | * Copyright (c) 2015 Google, Inc | |
| 3 | * Written by Simon Glass <[email protected]> | |
| 4 | * | |
| 5 | * SPDX-License-Identifier: GPL-2.0+ | |
| 6 | */ | |
| 7 | ||
| 8 | #ifndef __CPU_H | |
| 9 | #define __CPU_H | |
| 10 | ||
| 11 | /** | |
| 12 | * struct cpu_platdata - platform data for a CPU | |
| 13 | * | |
| 14 | * This can be accessed with dev_get_parent_platdata() for any UCLASS_CPU | |
| 15 | * device. | |
| 16 | * | |
| 17 | * @cpu_id: Platform-specific way of identifying the CPU. | |
| 740d5d34 | 18 | * @ucode_version: Microcode version, if CPU_FEAT_UCODE is set |
| 11f4dc15 SG |
19 | */ |
| 20 | struct cpu_platdata { | |
| 21 | int cpu_id; | |
| 740d5d34 SG |
22 | int ucode_version; |
| 23 | ulong device_id; | |
| 11f4dc15 SG |
24 | }; |
| 25 | ||
| 26 | /* CPU features - mostly just a placeholder for now */ | |
| 27 | enum { | |
| 28 | CPU_FEAT_L1_CACHE = 0, /* Supports level 1 cache */ | |
| 29 | CPU_FEAT_MMU = 1, /* Supports virtual memory */ | |
| 740d5d34 SG |
30 | CPU_FEAT_UCODE = 2, /* Requires/uses microcode */ |
| 31 | CPU_FEAT_DEVICE_ID = 3, /* Provides a device ID */ | |
| 11f4dc15 SG |
32 | |
| 33 | CPU_FEAT_COUNT, | |
| 34 | }; | |
| 35 | ||
| 36 | /** | |
| 37 | * struct cpu_info - Information about a CPU | |
| 38 | * | |
| 39 | * @cpu_freq: Current CPU frequency in Hz | |
| 40 | * @features: Flags for supported CPU features | |
| 41 | */ | |
| 42 | struct cpu_info { | |
| 43 | ulong cpu_freq; | |
| 44 | ulong features; | |
| 45 | }; | |
| 46 | ||
| 47 | struct cpu_ops { | |
| 48 | /** | |
| 49 | * get_desc() - Get a description string for a CPU | |
| 50 | * | |
| 51 | * @dev: Device to check (UCLASS_CPU) | |
| 52 | * @buf: Buffer to place string | |
| 53 | * @size: Size of string space | |
| 54 | * @return 0 if OK, -ENOSPC if buffer is too small, other -ve on error | |
| 55 | */ | |
| 56 | int (*get_desc)(struct udevice *dev, char *buf, int size); | |
| 57 | ||
| 58 | /** | |
| 59 | * get_info() - Get information about a CPU | |
| 60 | * | |
| 61 | * @dev: Device to check (UCLASS_CPU) | |
| 62 | * @info: Returns CPU info | |
| 63 | * @return 0 if OK, -ve on error | |
| 64 | */ | |
| 65 | int (*get_info)(struct udevice *dev, struct cpu_info *info); | |
| 780bfdd3 BM |
66 | |
| 67 | /** | |
| 68 | * get_count() - Get number of CPUs | |
| 69 | * | |
| 70 | * @dev: Device to check (UCLASS_CPU) | |
| 71 | * @return CPU count if OK, -ve on error | |
| 72 | */ | |
| 73 | int (*get_count)(struct udevice *dev); | |
| 11f4dc15 SG |
74 | }; |
| 75 | ||
| 76 | #define cpu_get_ops(dev) ((struct cpu_ops *)(dev)->driver->ops) | |
| 77 | ||
| 78 | /** | |
| 79 | * cpu_get_desc() - Get a description string for a CPU | |
| 80 | * | |
| 81 | * @dev: Device to check (UCLASS_CPU) | |
| 82 | * @buf: Buffer to place string | |
| 83 | * @size: Size of string space | |
| 84 | * @return 0 if OK, -ENOSPC if buffer is too small, other -ve on error | |
| 85 | */ | |
| 86 | int cpu_get_desc(struct udevice *dev, char *buf, int size); | |
| 87 | ||
| 88 | /** | |
| 89 | * cpu_get_info() - Get information about a CPU | |
| 90 | * | |
| 91 | * @dev: Device to check (UCLASS_CPU) | |
| 92 | * @info: Returns CPU info | |
| 93 | * @return 0 if OK, -ve on error | |
| 94 | */ | |
| 95 | int cpu_get_info(struct udevice *dev, struct cpu_info *info); | |
| 96 | ||
| 780bfdd3 BM |
97 | /** |
| 98 | * cpu_get_count() - Get number of CPUs | |
| 99 | * | |
| 100 | * @dev: Device to check (UCLASS_CPU) | |
| 101 | * @return CPU count if OK, -ve on error | |
| 102 | */ | |
| 103 | int cpu_get_count(struct udevice *dev); | |
| 104 | ||
| 11f4dc15 | 105 | #endif |