blob: d2f167b2e188a560efae70d352d5254d2f952ed4 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
/* SPDX-License-Identifier: GPL-2.0 */
/*
* GXP doorbell interface.
*
* Copyright (C) 2020 Google LLC
*/
#ifndef __GXP_DOORBELL_H__
#define __GXP_DOORBELL_H__
#include "gxp-internal.h"
/**
* gxp_doorbell_enable_for_core() - Enable a core to receive interrupts from
* the specified doorbell
* @gxp: The GXP device to enable the doorbell for
* @doorbell_num: The index of the doorbell to enable
* @core: The core which will receive interrupts from the enabled doorbell
*
* This function can only be called before firmware is running on @core or as
* part of halting firmware on it. Firmware may read or modify which doorbells
* it is listening to and accesses are not synchronized between the driver and
* firmware.
*/
void gxp_doorbell_enable_for_core(struct gxp_dev *gxp, u32 doorbell_num,
uint core);
/**
* gxp_doorbell_set() - Ring the specified doorbell
* @gxp: The GXP device to ring the doorbell for
* @doorbell_num: The index of the doorbell to ring
*
* Any cores this doorbell is enabled for willexecute their handler.
*/
void gxp_doorbell_set(struct gxp_dev *gxp, u32 doorbell_num);
/**
* gxp_doorbell_clear() - Clear the specified doorbell's interrupt
* @gxp: The GXP device to clear the doorbell for
* @doorbell_num: The index of the doorbell to clear
*/
void gxp_doorbell_clear(struct gxp_dev *gxp, u32 doorbell_num);
/**
* gxp_doorbell_status() - Returns whether the specified doorbell is rung
* @gxp: The GXP device containing the doorbell
* @doorbell_num: The index of the doorbell to check
*
* Return: The status register of the doorbell, 1 for rung, 0 for cleared
*/
u32 gxp_doorbell_status(struct gxp_dev *gxp, u32 doorbell_num);
#endif /* __GXP_DOORBELL_H__ */
|
