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40 lines
1.1 KiB
40 lines
1.1 KiB
4 months ago
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/*
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* Copyright (c) 2019, Arm Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef RPI3_MBOX_H
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#define RPI3_MBOX_H
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#include <stdint.h>
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/* This struct must be aligned to 16 bytes */
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typedef struct __packed __aligned(16) rpi3_mbox_request {
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uint32_t size; /* Buffer size in bytes */
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uint32_t code; /* Request/response code */
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uint32_t tags[0];
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} rpi3_mbox_request_t;
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#define RPI3_MBOX_BUFFER_SIZE U(256)
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/* Constants to perform a request/check the status of a request. */
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#define RPI3_MBOX_PROCESS_REQUEST U(0x00000000)
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#define RPI3_MBOX_REQUEST_SUCCESSFUL U(0x80000000)
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#define RPI3_MBOX_REQUEST_ERROR U(0x80000001)
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/* Command constants */
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#define RPI3_TAG_HARDWARE_GET_BOARD_REVISION U(0x00010002)
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#define RPI3_TAG_END U(0x00000000)
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#define RPI3_TAG_REQUEST U(0x00000000)
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#define RPI3_TAG_IS_RESPONSE U(0x80000000) /* Set if response */
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#define RPI3_TAG_RESPONSE_LENGTH_MASK U(0x7FFFFFFF)
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#define RPI3_CHANNEL_ARM_TO_VC U(0x8)
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#define RPI3_CHANNEL_MASK U(0xF)
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void rpi3_vc_mailbox_request_send(rpi3_mbox_request_t *req, int req_size);
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#endif
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