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      1 /*	$NetBSD: tegra186-hsp.h,v 1.1.1.3 2019/05/25 11:29:13 jmcneill Exp $	*/
      2 
      3 /* SPDX-License-Identifier: GPL-2.0 */
      4 /*
      5  * This header provides constants for binding nvidia,tegra186-hsp.
      6  */
      7 
      8 #ifndef _DT_BINDINGS_MAILBOX_TEGRA186_HSP_H
      9 #define _DT_BINDINGS_MAILBOX_TEGRA186_HSP_H
     10 
     11 /*
     12  * These define the type of mailbox that is to be used (doorbell, shared
     13  * mailbox, shared semaphore or arbitrated semaphore).
     14  */
     15 #define TEGRA_HSP_MBOX_TYPE_DB 0x0
     16 #define TEGRA_HSP_MBOX_TYPE_SM 0x1
     17 #define TEGRA_HSP_MBOX_TYPE_SS 0x2
     18 #define TEGRA_HSP_MBOX_TYPE_AS 0x3
     19 
     20 /*
     21  * These defines represent the bit associated with the given master ID in the
     22  * doorbell registers.
     23  */
     24 #define TEGRA_HSP_DB_MASTER_CCPLEX 17
     25 #define TEGRA_HSP_DB_MASTER_BPMP 19
     26 
     27 /*
     28  * Shared mailboxes are unidirectional, so the direction needs to be specified
     29  * in the device tree.
     30  */
     31 #define TEGRA_HSP_SM_MASK 0x00ffffff
     32 #define TEGRA_HSP_SM_FLAG_RX (0 << 31)
     33 #define TEGRA_HSP_SM_FLAG_TX (1 << 31)
     34 
     35 #define TEGRA_HSP_SM_RX(x) (TEGRA_HSP_SM_FLAG_RX | ((x) & TEGRA_HSP_SM_MASK))
     36 #define TEGRA_HSP_SM_TX(x) (TEGRA_HSP_SM_FLAG_TX | ((x) & TEGRA_HSP_SM_MASK))
     37 
     38 #endif
     39