/* * Copyright (c) 2019-2024, Arm Limited and Contributors. All rights reserved. * * SPDX-License-Identifier: BSD-3-Clause */ #ifndef RPI3_MBOX_H #define RPI3_MBOX_H #include /* This struct must be aligned to 16 bytes */ typedef struct __packed __aligned(16) rpi3_mbox_request { uint32_t size; /* Buffer size in bytes */ uint32_t code; /* Request/response code */ uint32_t tags[0]; } rpi3_mbox_request_t; /* VideoCore -> ARM */ #define RPI3_MBOX0_READ_OFFSET ULL(0x00000000) #define RPI3_MBOX0_PEEK_OFFSET ULL(0x00000010) #define RPI3_MBOX0_SENDER_OFFSET ULL(0x00000014) #define RPI3_MBOX0_STATUS_OFFSET ULL(0x00000018) #define RPI3_MBOX0_CONFIG_OFFSET ULL(0x0000001C) /* ARM -> VideoCore */ #define RPI3_MBOX1_WRITE_OFFSET ULL(0x00000020) #define RPI3_MBOX1_PEEK_OFFSET ULL(0x00000030) #define RPI3_MBOX1_SENDER_OFFSET ULL(0x00000034) #define RPI3_MBOX1_STATUS_OFFSET ULL(0x00000038) #define RPI3_MBOX1_CONFIG_OFFSET ULL(0x0000003C) /* Mailbox status constants */ #define RPI3_MBOX_STATUS_FULL_MASK U(0x80000000) /* Set if full */ #define RPI3_MBOX_STATUS_EMPTY_MASK U(0x40000000) /* Set if empty */ #define RPI3_MBOX_BUFFER_SIZE U(256) /* Constants to perform a request/check the status of a request. */ #define RPI3_MBOX_PROCESS_REQUEST U(0x00000000) #define RPI3_MBOX_REQUEST_SUCCESSFUL U(0x80000000) #define RPI3_MBOX_REQUEST_ERROR U(0x80000001) /* Command constants */ #define RPI3_TAG_HARDWARE_GET_BOARD_REVISION U(0x00010002) #define RPI3_TAG_END U(0x00000000) #define RPI3_TAG_REQUEST U(0x00000000) #define RPI3_TAG_IS_RESPONSE U(0x80000000) /* Set if response */ #define RPI3_TAG_RESPONSE_LENGTH_MASK U(0x7FFFFFFF) #define RPI3_CHANNEL_ARM_TO_VC U(0x8) #define RPI3_CHANNEL_MASK U(0xF) void rpi3_vc_mailbox_request_send(rpi3_mbox_request_t *req, int req_size); #endif