| /* |
| * Copyright (c) 2014-2020, ARM Limited and Contributors. All rights reserved. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| #ifndef CSS_MHU_DOORBELL_H |
| #define CSS_MHU_DOORBELL_H |
| |
| #include <stdint.h> |
| |
| #include <lib/mmio.h> |
| |
| /* MHUv2 Frame Base Mask */ |
| #define MHU_V2_FRAME_BASE_MASK UL(~0xFFF) |
| |
| /* MHUv2 Control Registers Offsets */ |
| #define MHU_V2_MSG_NO_CAP_OFFSET UL(0xF80) |
| #define MHU_V2_ACCESS_REQ_OFFSET UL(0xF88) |
| #define MHU_V2_ACCESS_READY_OFFSET UL(0xF8C) |
| |
| #define SENDER_REG_STAT(_channel) (0x20 * (_channel)) |
| #define SENDER_REG_SET(_channel) ((0x20 * (_channel)) + 0xC) |
| |
| /* Helper macro to ring doorbell */ |
| #define MHU_RING_DOORBELL(addr, modify_mask, preserve_mask) do { \ |
| uint32_t db = mmio_read_32(addr) & (preserve_mask); \ |
| mmio_write_32(addr, db | (modify_mask)); \ |
| } while (0) |
| |
| #define MHU_V2_ACCESS_REQUEST(addr) \ |
| mmio_write_32((addr) + MHU_V2_ACCESS_REQ_OFFSET, 0x1) |
| |
| #define MHU_V2_CLEAR_REQUEST(addr) \ |
| mmio_write_32((addr) + MHU_V2_ACCESS_REQ_OFFSET, 0x0) |
| |
| #define MHU_V2_IS_ACCESS_READY(addr) \ |
| (mmio_read_32((addr) + MHU_V2_ACCESS_READY_OFFSET) & 0x1) |
| |
| struct scmi_channel_plat_info; |
| void mhu_ring_doorbell(struct scmi_channel_plat_info *plat_info); |
| void mhuv2_ring_doorbell(struct scmi_channel_plat_info *plat_info); |
| |
| #endif /* CSS_MHU_DOORBELL_H */ |
