1*91f16700Schasinglulu /* 2*91f16700Schasinglulu * Copyright (c) 2014-2020, ARM Limited and Contributors. All rights reserved. 3*91f16700Schasinglulu * 4*91f16700Schasinglulu * SPDX-License-Identifier: BSD-3-Clause 5*91f16700Schasinglulu */ 6*91f16700Schasinglulu 7*91f16700Schasinglulu #ifndef CSS_MHU_DOORBELL_H 8*91f16700Schasinglulu #define CSS_MHU_DOORBELL_H 9*91f16700Schasinglulu 10*91f16700Schasinglulu #include <stdint.h> 11*91f16700Schasinglulu 12*91f16700Schasinglulu #include <lib/mmio.h> 13*91f16700Schasinglulu 14*91f16700Schasinglulu /* MHUv2 Frame Base Mask */ 15*91f16700Schasinglulu #define MHU_V2_FRAME_BASE_MASK UL(~0xFFF) 16*91f16700Schasinglulu 17*91f16700Schasinglulu /* MHUv2 Control Registers Offsets */ 18*91f16700Schasinglulu #define MHU_V2_MSG_NO_CAP_OFFSET UL(0xF80) 19*91f16700Schasinglulu #define MHU_V2_ACCESS_REQ_OFFSET UL(0xF88) 20*91f16700Schasinglulu #define MHU_V2_ACCESS_READY_OFFSET UL(0xF8C) 21*91f16700Schasinglulu 22*91f16700Schasinglulu #define SENDER_REG_STAT(_channel) (0x20 * (_channel)) 23*91f16700Schasinglulu #define SENDER_REG_SET(_channel) ((0x20 * (_channel)) + 0xC) 24*91f16700Schasinglulu 25*91f16700Schasinglulu /* Helper macro to ring doorbell */ 26*91f16700Schasinglulu #define MHU_RING_DOORBELL(addr, modify_mask, preserve_mask) do { \ 27*91f16700Schasinglulu uint32_t db = mmio_read_32(addr) & (preserve_mask); \ 28*91f16700Schasinglulu mmio_write_32(addr, db | (modify_mask)); \ 29*91f16700Schasinglulu } while (0) 30*91f16700Schasinglulu 31*91f16700Schasinglulu #define MHU_V2_ACCESS_REQUEST(addr) \ 32*91f16700Schasinglulu mmio_write_32((addr) + MHU_V2_ACCESS_REQ_OFFSET, 0x1) 33*91f16700Schasinglulu 34*91f16700Schasinglulu #define MHU_V2_CLEAR_REQUEST(addr) \ 35*91f16700Schasinglulu mmio_write_32((addr) + MHU_V2_ACCESS_REQ_OFFSET, 0x0) 36*91f16700Schasinglulu 37*91f16700Schasinglulu #define MHU_V2_IS_ACCESS_READY(addr) \ 38*91f16700Schasinglulu (mmio_read_32((addr) + MHU_V2_ACCESS_READY_OFFSET) & 0x1) 39*91f16700Schasinglulu 40*91f16700Schasinglulu struct scmi_channel_plat_info; 41*91f16700Schasinglulu void mhu_ring_doorbell(struct scmi_channel_plat_info *plat_info); 42*91f16700Schasinglulu void mhuv2_ring_doorbell(struct scmi_channel_plat_info *plat_info); 43*91f16700Schasinglulu 44*91f16700Schasinglulu #endif /* CSS_MHU_DOORBELL_H */ 45