1 /* 2 * Copyright (c) 2019, Arm Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #ifndef RPI3_MBOX_H 8 #define RPI3_MBOX_H 9 10 #include <stdint.h> 11 12 /* This struct must be aligned to 16 bytes */ 13 typedef struct __packed __aligned(16) rpi3_mbox_request { 14 uint32_t size; /* Buffer size in bytes */ 15 uint32_t code; /* Request/response code */ 16 uint32_t tags[0]; 17 } rpi3_mbox_request_t; 18 19 #define RPI3_MBOX_BUFFER_SIZE U(256) 20 21 /* Constants to perform a request/check the status of a request. */ 22 #define RPI3_MBOX_PROCESS_REQUEST U(0x00000000) 23 #define RPI3_MBOX_REQUEST_SUCCESSFUL U(0x80000000) 24 #define RPI3_MBOX_REQUEST_ERROR U(0x80000001) 25 26 /* Command constants */ 27 #define RPI3_TAG_HARDWARE_GET_BOARD_REVISION U(0x00010002) 28 #define RPI3_TAG_END U(0x00000000) 29 30 #define RPI3_TAG_REQUEST U(0x00000000) 31 #define RPI3_TAG_IS_RESPONSE U(0x80000000) /* Set if response */ 32 #define RPI3_TAG_RESPONSE_LENGTH_MASK U(0x7FFFFFFF) 33 34 #define RPI3_CHANNEL_ARM_TO_VC U(0x8) 35 #define RPI3_CHANNEL_MASK U(0xF) 36 37 void rpi3_vc_mailbox_request_send(rpi3_mbox_request_t *req, int req_size); 38 39 #endif 40