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Diffstat (limited to '')
| -rw-r--r-- | include/drivers/arm/css/css_mhu_doorbell.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/include/drivers/arm/css/css_mhu_doorbell.h b/include/drivers/arm/css/css_mhu_doorbell.h new file mode 100644 index 0000000..88302fd --- /dev/null +++ b/include/drivers/arm/css/css_mhu_doorbell.h @@ -0,0 +1,44 @@ +/* + * 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 */ |