projects / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| c52cd074 AR |
1 | /* SPDX-License-Identifier: GPL-2.0+ */ |
| 2 | /* | |
| 3 | * Copyright (c) 2023 SberDevices, Inc. | |
| 4 | * | |
| 5 | * Author: Alexey Romanov <[email protected]> | |
| 6 | */ | |
| 7 | ||
| 8 | #ifndef __SM_H__ | |
| 9 | #define __SM_H__ | |
| 10 | ||
| 11 | /* | |
| 12 | * NOTE: UCLASS_SM is designed with the idea that | |
| 13 | * each driver should convert @cmd to some raw | |
| 14 | * value, which is known only for driver, and set this | |
| 15 | * value to the first element of the @args->regs array. | |
| 16 | * Therefore, it is necessary to pass the remaining | |
| 17 | * arguments starting at index = 1. Anyway, driver | |
| 18 | * implementation may vary, so, please, check the specific | |
| 19 | * implementation of the driver you are using. | |
| 20 | */ | |
| 21 | ||
| 03de305e | 22 | #include <linux/types.h> |
| c52cd074 AR |
23 | #include <asm/ptrace.h> |
| 24 | ||
| 25 | struct udevice; | |
| 26 | ||
| 27 | /** | |
| 28 | * sm_call - generic SMC call to the secure-monitor | |
| 29 | * | |
| 30 | * @dev: Pointer to UCLASS_SM device | |
| 31 | * @cmd_index: Index of the SMC function ID | |
| 32 | * @smc_ret: Returned value from secure world | |
| 33 | * @args: SMC arguments | |
| 34 | * | |
| 35 | * @return: 0 on success, a negative value on error | |
| 36 | */ | |
| 37 | int sm_call(struct udevice *dev, u32 cmd, s32 *ret, struct pt_regs *args); | |
| 38 | ||
| 39 | /** | |
| 40 | * sm_call_read - retrieve data from secure-monitor | |
| 41 | * | |
| 42 | * @dev: Pointer to UCLASS_MESON_SM device | |
| 43 | * @buffer: Buffer to store the retrieved data | |
| 44 | * @size: Size of the buffer | |
| 45 | * @cmd: Index of the SMC function ID | |
| 46 | * @args: SMC arguments | |
| 47 | * | |
| 48 | * @return: size of read data on success, a negative value on error | |
| 49 | */ | |
| 50 | int sm_call_read(struct udevice *dev, void *buffer, size_t size, | |
| 51 | u32 cmd, struct pt_regs *args); | |
| 52 | ||
| 53 | /** | |
| 54 | * sm_call_write - send data to secure-monitor | |
| 55 | * | |
| 56 | * @dev: Pointer to UCLASS_SM device | |
| 57 | * @buffer: Buffer containing data to send | |
| 58 | * @size: Size of the buffer | |
| 59 | * @cmd: Index of the SMC function ID | |
| 60 | * @args: SMC arguments | |
| 61 | * | |
| 62 | * @return: size of sent data on success, a negative value on error | |
| 63 | */ | |
| 64 | int sm_call_write(struct udevice *dev, void *buffer, size_t size, | |
| 65 | u32 cmd, struct pt_regs *args); | |
| 66 | ||
| 67 | #endif /* __SM_H__ */ |