The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)

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FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/include/dt-bindings/mailbox/tegra186-hsp.h

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    1 /* SPDX-License-Identifier: GPL-2.0 */
    2 /*
    3  * This header provides constants for binding nvidia,tegra186-hsp.
    4  */
    5 
    6 #ifndef _DT_BINDINGS_MAILBOX_TEGRA186_HSP_H
    7 #define _DT_BINDINGS_MAILBOX_TEGRA186_HSP_H
    8 
    9 /*
   10  * These define the type of mailbox that is to be used (doorbell, shared
   11  * mailbox, shared semaphore or arbitrated semaphore).
   12  */
   13 #define TEGRA_HSP_MBOX_TYPE_DB 0x0
   14 #define TEGRA_HSP_MBOX_TYPE_SM 0x1
   15 #define TEGRA_HSP_MBOX_TYPE_SS 0x2
   16 #define TEGRA_HSP_MBOX_TYPE_AS 0x3
   17 
   18 /*
   19  * These define the types of shared mailbox supported based on data size.
   20  */
   21 #define TEGRA_HSP_MBOX_TYPE_SM_128BIT (1 << 8)
   22 
   23 /*
   24  * These defines represent the bit associated with the given master ID in the
   25  * doorbell registers.
   26  */
   27 #define TEGRA_HSP_DB_MASTER_CCPLEX 17
   28 #define TEGRA_HSP_DB_MASTER_BPMP 19
   29 
   30 /*
   31  * Shared mailboxes are unidirectional, so the direction needs to be specified
   32  * in the device tree.
   33  */
   34 #define TEGRA_HSP_SM_MASK 0x00ffffff
   35 #define TEGRA_HSP_SM_FLAG_RX (0 << 31)
   36 #define TEGRA_HSP_SM_FLAG_TX (1 << 31)
   37 
   38 #define TEGRA_HSP_SM_RX(x) (TEGRA_HSP_SM_FLAG_RX | ((x) & TEGRA_HSP_SM_MASK))
   39 #define TEGRA_HSP_SM_TX(x) (TEGRA_HSP_SM_FLAG_TX | ((x) & TEGRA_HSP_SM_MASK))
   40 
   41 #endif

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