vsf_template_dma.h

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/*****************************************************************************
 *   Copyright(C)2009-2022 by VSF Team                                       *
 *                                                                           *
 *  Licensed under the Apache License, Version 2.0 (the "License");          *
 *  you may not use this file except in compliance with the License.         *
 *  You may obtain a copy of the License at                                  *
 *                                                                           *
 *     http://www.apache.org/licenses/LICENSE-2.0                            *
 *                                                                           *
 *  Unless required by applicable law or agreed to in writing, software      *
 *  distributed under the License is distributed on an "AS IS" BASIS,        *
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
 *  See the License for the specific language governing permissions and      *
 *  limitations under the License.                                           *
 *                                                                           *
 ****************************************************************************/
 
#ifndef __VSF_TEMPLATE_DMA_H__
#define __VSF_TEMPLATE_DMA_H__
 
/*============================ INCLUDES ======================================*/
 
#include "./vsf_template_hal_driver.h"
#include "hal/arch/vsf_arch.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
/*============================ MACROS ========================================*/
 
#ifndef VSF_DMA_CFG_MULTI_CLASS
#   define VSF_DMA_CFG_MULTI_CLASS                        ENABLED
#endif
 
#ifndef VSF_DMA_CFG_PREFIX
#   if VSF_DMA_CFG_MULTI_CLASS == ENABLED
#       define VSF_DMA_CFG_PREFIX                         vsf
#   elif defined(VSF_HW_DMA_COUNT) && (VSF_HW_DMA_COUNT != 0)
#       define VSF_DMA_CFG_PREFIX                         vsf_hw
#   else
#       define VSF_DMA_CFG_PREFIX                         vsf
#   endif
#endif
 
#ifndef VSF_DMA_CFG_FUNCTION_RENAME
#   define VSF_DMA_CFG_FUNCTION_RENAME                  ENABLED
#endif
 
#ifndef VSF_DMA_CFG_REIMPLEMENT_TYPE_CHANNEL_MODE
#   define VSF_DMA_CFG_REIMPLEMENT_TYPE_CHANNEL_MODE    DISABLED
#endif
 
#ifndef VSF_DMA_CFG_REIMPLEMENT_TYPE_IRQ_MASK
#   define VSF_DMA_CFG_REIMPLEMENT_TYPE_IRQ_MASK        DISABLED
#endif
 
 
#ifndef VSF_DMA_CFG_REIMPLEMENT_CFG_TYPE_CFG
#   define VSF_DMA_CFG_REIMPLEMENT_CFG_TYPE_CFG         DISABLED
#endif
 
#ifndef VSF_DMA_CFG_REIMPLEMENT_TYPE_CHANNEL_HINT
#   define VSF_DMA_CFG_REIMPLEMENT_TYPE_CHANNEL_HINT    DISABLED
#endif
 
#ifndef VSF_DMA_CFG_REIMPLEMENT_TYPE_CHANNEL_CFG
#   define VSF_DMA_CFG_REIMPLEMENT_TYPE_CHANNEL_CFG     DISABLED
#endif
 
#ifndef VSF_DMA_CFG_REIMPLEMENT_TYPE_CHANNEL_SG_CFG
#   define VSF_DMA_CFG_REIMPLEMENT_TYPE_CHANNEL_SG_CFG  \
                                                        DISABLED
#endif
 
#ifndef VSF_DMA_CFG_REIMPLEMENT_TYPE_CFG
#   define VSF_DMA_CFG_REIMPLEMENT_TYPE_CFG             DISABLED
#endif
 
#ifndef VSF_DMA_CFG_REIMPLEMENT_TYPE_CAPABILITY
#   define VSF_DMA_CFG_REIMPLEMENT_TYPE_CAPABILITY     DISABLED
#endif
 
#ifndef VSF_DMA_CFG_INHERIT_HAL_CAPABILITY
#   define VSF_DMA_CFG_INHERIT_HAL_CAPABILITY            ENABLED
#endif
 
#ifndef VSF_DMA_CHANNEL_SG_ARRAY
#   define VSF_DMA_CHANNEL_SG_ARRAY(__NAME, __COUNT, ...)                       \
    vsf_dma_channel_sg_desc_t __NAME[__COUNT] = {                               \
        __VA_ARGS__                                                             \
    };
#endif
 
#ifndef VSF_DMA_CHANNEL_SG_ITEM
#   define VSF_DMA_CHANNEL_SG_ITEM(__MODE, __SRC_ADDR, __DST_ADDR, __CNT, ...)  \
    {                                                                           \
        .mode = __MODE,                                                         \
        .src_address = __SRC_ADDR,                                              \
        .dst_address = __DST_ADDR,                                              \
        .count = __CNT,                                                         \
        __VA_ARGS__                                                             \
    }
#endif
 
/*============================ MACROFIED FUNCTIONS ===========================*/
 
#define VSF_DMA_APIS(__prefix_name) \
    __VSF_HAL_TEMPLATE_API(__prefix_name, vsf_err_t,                dma, init,                               VSF_MCONNECT(__prefix_name, _dma_t) *dma_ptr, vsf_dma_cfg_t *cfg_ptr) \
    __VSF_HAL_TEMPLATE_API(__prefix_name, void,                     dma, fini,                               VSF_MCONNECT(__prefix_name, _dma_t) *dma_ptr) \
    __VSF_HAL_TEMPLATE_API(__prefix_name, vsf_dma_capability_t,     dma, capability,                         VSF_MCONNECT(__prefix_name, _dma_t) *dma_ptr) \
    __VSF_HAL_TEMPLATE_API(__prefix_name, int8_t,                   dma, channel_request,                    VSF_MCONNECT(__prefix_name, _dma_t) *dma_ptr, vsf_dma_channel_hint_t *channel_hint_ptr) \
    __VSF_HAL_TEMPLATE_API(__prefix_name, void,                     dma, channel_release,                    VSF_MCONNECT(__prefix_name, _dma_t) *dma_ptr, uint8_t channel) \
    __VSF_HAL_TEMPLATE_API(__prefix_name, vsf_err_t,                dma, channel_config,                     VSF_MCONNECT(__prefix_name, _dma_t) *dma_ptr, uint8_t channel, vsf_dma_channel_cfg_t *cfg_ptr) \
    __VSF_HAL_TEMPLATE_API(__prefix_name, vsf_err_t,                dma, channel_start,                      VSF_MCONNECT(__prefix_name, _dma_t) *dma_ptr, uint8_t channel, uint32_t src_address, uint32_t dst_address, uint32_t count) \
    __VSF_HAL_TEMPLATE_API(__prefix_name, vsf_err_t,                dma, channel_cancel,                     VSF_MCONNECT(__prefix_name, _dma_t) *dma_ptr, uint8_t channel) \
    __VSF_HAL_TEMPLATE_API(__prefix_name, vsf_err_t,                dma, channel_sg_config_desc,             VSF_MCONNECT(__prefix_name, _dma_t) *dma_ptr, uint8_t channel, vsf_dma_isr_t isr, vsf_dma_channel_sg_desc_t *scatter_gather_cfg, uint32_t sg_count) \
    __VSF_HAL_TEMPLATE_API(__prefix_name, vsf_err_t,                dma, channel_sg_start,                   VSF_MCONNECT(__prefix_name, _dma_t) *dma_ptr, uint8_t channel) \
    __VSF_HAL_TEMPLATE_API(__prefix_name, uint32_t,                 dma, channel_get_transferred_count,      VSF_MCONNECT(__prefix_name, _dma_t) *dma_ptr, uint8_t channel) \
    __VSF_HAL_TEMPLATE_API(__prefix_name, vsf_dma_channel_status_t, dma, channel_status,                     VSF_MCONNECT(__prefix_name, _dma_t) *dma_ptr, uint8_t channel)
 
/*============================ TYPES =========================================*/
 
#if VSF_DMA_CFG_REIMPLEMENT_TYPE_CHANNEL_MODE == DISABLED
typedef enum vsf_dma_channel_mode_t {
    VSF_DMA_MEMORY_TO_MEMORY        = (0x00 << 0),
    VSF_DMA_MEMORY_TO_PERIPHERAL    = (0x01 << 0),
    VSF_DMA_PERIPHERA_TO_MEMORY     = (0x02 << 0),
    VSF_DMA_PERIPHERA_TO_PERIPHERAL = (0x03 << 0),
 
    VSF_DMA_SRC_ADDR_INCREMENT      = (0x00 << 2),
    VSF_DMA_SRC_ADDR_DECREMENT      = (0x01 << 2),
    VSF_DMA_SRC_ADDR_NO_CHANGE      = (0x02 << 2),
 
    VSF_DMA_DST_ADDR_INCREMENT      = (0x00 << 4),
    VSF_DMA_DST_ADDR_DECREMENT      = (0x01 << 4),
    VSF_DMA_DST_ADDR_NO_CHANGE      = (0x02 << 4),
 
    VSF_DMA_SRC_WIDTH_BYTE_1        = (0x00 << 6),
    VSF_DMA_SRC_WIDTH_BYTES_2       = (0x01 << 6),
    VSF_DMA_SRC_WIDTH_BYTES_4       = (0x02 << 6),
    VSF_DMA_SRC_WIDTH_BYTES_8       = (0x03 << 6),
    VSF_DMA_SRC_WIDTH_BYTES_16      = (0x04 << 6),
    VSF_DMA_SRC_WIDTH_BYTES_32      = (0x05 << 6),
 
    VSF_DMA_DST_WIDTH_BYTE_1        = (0x00 << 10),
    VSF_DMA_DST_WIDTH_BYTES_2       = (0x01 << 10),
    VSF_DMA_DST_WIDTH_BYTES_4       = (0x02 << 10),
    VSF_DMA_DST_WIDTH_BYTES_8       = (0x03 << 10),
    VSF_DMA_DST_WIDTH_BYTES_16      = (0x04 << 10),
    VSF_DMA_DST_WIDTH_BYTES_32      = (0x05 << 10),
 
    VSF_DMA_SRC_BURST_LENGTH_1       = (0x00 << 14),
    VSF_DMA_SRC_BURST_LENGTH_2       = (0x01 << 14),
    VSF_DMA_SRC_BURST_LENGTH_4       = (0x02 << 14),
    VSF_DMA_SRC_BURST_LENGTH_8       = (0x03 << 14),
    VSF_DMA_SRC_BURST_LENGTH_16      = (0x04 << 14),
    VSF_DMA_SRC_BURST_LENGTH_32      = (0x05 << 14),
    VSF_DMA_SRC_BURST_LENGTH_64      = (0x05 << 14),
    VSF_DMA_SRC_BURST_LENGTH_128     = (0x06 << 14),
 
    VSF_DMA_DST_BURST_LENGTH_1       = (0x00 << 18),
    VSF_DMA_DST_BURST_LENGTH_2       = (0x01 << 18),
    VSF_DMA_DST_BURST_LENGTH_4       = (0x02 << 18),
    VSF_DMA_DST_BURST_LENGTH_8       = (0x03 << 18),
    VSF_DMA_DST_BURST_LENGTH_16      = (0x04 << 18),
    VSF_DMA_DST_BURST_LENGTH_32      = (0x05 << 18),
    VSF_DMA_DST_BURST_LENGTH_64      = (0x05 << 18),
    VSF_DMA_DST_BURST_LENGTH_128     = (0x06 << 18),
 
    //prio
    VSF_DMA_PRIOPIRY_LOW             = (0x00 << 22),
    VSF_DMA_PRIOPIRY_MEDIUM          = (0x01 << 22),
    VSF_DMA_PRIOPIRY_HIGH            = (0x02 << 22),
    VSF_DMA_PRIOPIRY_VERY_HIGH       = (0x03 << 22),
 
} vsf_dma_channel_mode_t;
#endif
 
enum {
    VSF_DMA_DIRECTION_COUNT           = 4,
    VSF_DMA_DIRECTION_MASK            = VSF_DMA_MEMORY_TO_MEMORY        |
                                        VSF_DMA_MEMORY_TO_PERIPHERAL    |
                                        VSF_DMA_PERIPHERA_TO_MEMORY     |
                                        VSF_DMA_PERIPHERA_TO_PERIPHERAL,
 
    VSF_DMA_SRC_ADDR_COUNT            = 3,
    VSF_DMA_SRC_ADDR_MASK             = VSF_DMA_SRC_ADDR_INCREMENT |
                                        VSF_DMA_SRC_ADDR_DECREMENT |
                                        VSF_DMA_SRC_ADDR_NO_CHANGE,
 
    VSF_DMA_DST_ADDR_COUNT            = 3,
    VSF_DMA_DST_ADDR_MASK             = VSF_DMA_DST_ADDR_INCREMENT |
                                        VSF_DMA_DST_ADDR_DECREMENT |
                                        VSF_DMA_DST_ADDR_NO_CHANGE,
 
    VSF_DMA_SRC_WIDTH_COUNT           = 6,
    VSF_DMA_SRC_WIDTH_MASK            = VSF_DMA_SRC_WIDTH_BYTE_1   |
                                        VSF_DMA_SRC_WIDTH_BYTES_2  |
                                        VSF_DMA_SRC_WIDTH_BYTES_4  |
                                        VSF_DMA_SRC_WIDTH_BYTES_8  |
                                        VSF_DMA_SRC_WIDTH_BYTES_16 |
                                        VSF_DMA_SRC_WIDTH_BYTES_32,
 
    VSF_DMA_DST_WIDTH_COUNT           = 6,
    VSF_DMA_DST_WIDTH_MASK            = VSF_DMA_DST_WIDTH_BYTE_1   |
                                        VSF_DMA_DST_WIDTH_BYTES_2  |
                                        VSF_DMA_DST_WIDTH_BYTES_4  |
                                        VSF_DMA_DST_WIDTH_BYTES_8  |
                                        VSF_DMA_DST_WIDTH_BYTES_16 |
                                        VSF_DMA_DST_WIDTH_BYTES_32,
 
    VSF_DMA_SRC_BURST_COUNT           = 8,
    VSF_DMA_SRC_BURST_MASK            = VSF_DMA_SRC_BURST_LENGTH_1   |
                                        VSF_DMA_SRC_BURST_LENGTH_2   |
                                        VSF_DMA_SRC_BURST_LENGTH_4   |
                                        VSF_DMA_SRC_BURST_LENGTH_8   |
                                        VSF_DMA_SRC_BURST_LENGTH_16  |
                                        VSF_DMA_SRC_BURST_LENGTH_32  |
                                        VSF_DMA_SRC_BURST_LENGTH_64  |
                                        VSF_DMA_SRC_BURST_LENGTH_128,
 
    VSF_DMA_DST_BURST_COUNT           = 8,
    VSF_DMA_DST_BURST_MASK            = VSF_DMA_DST_BURST_LENGTH_1   |
                                        VSF_DMA_DST_BURST_LENGTH_2   |
                                        VSF_DMA_DST_BURST_LENGTH_4   |
                                        VSF_DMA_DST_BURST_LENGTH_8   |
                                        VSF_DMA_DST_BURST_LENGTH_16  |
                                        VSF_DMA_DST_BURST_LENGTH_32  |
                                        VSF_DMA_DST_BURST_LENGTH_64  |
                                        VSF_DMA_DST_BURST_LENGTH_128,
 
    VSF_DMA_PRIOPIRY_COUNT            = 4,
    VSF_DMA_PRIOPIRY_MASK             = VSF_DMA_PRIOPIRY_LOW       |
                                        VSF_DMA_PRIOPIRY_MEDIUM    |
                                        VSF_DMA_PRIOPIRY_HIGH      |
                                        VSF_DMA_PRIOPIRY_VERY_HIGH,
 
    VSF_DMA_MODE_MASK_COUNT           = 8,
    VSF_DMA_MODE_ALL_BITS_MASK        = VSF_DMA_DIRECTION_MASK  |
                                        VSF_DMA_SRC_ADDR_MASK   |
                                        VSF_DMA_DST_ADDR_MASK   |
                                        VSF_DMA_SRC_WIDTH_MASK  |
                                        VSF_DMA_DST_WIDTH_MASK  |
                                        VSF_DMA_SRC_BURST_MASK  |
                                        VSF_DMA_DST_BURST_MASK  |
                                        VSF_DMA_PRIOPIRY_MASK,
 
};
 
#if VSF_DMA_CFG_REIMPLEMENT_TYPE_IRQ_MASK == DISABLED
typedef enum vsf_dma_irq_mask_t {
    VSF_DMA_IRQ_MASK_CPL        = (0x1ul << 0),
    VSF_DMA_IRQ_MASK_HALF_CPL   = (0x1ul << 1),
    VSF_DMA_IRQ_MASK_ERROR      = (0x1ul << 2),
} vsf_dma_irq_mask_t;
#endif
 
enum {
    VSF_DMA_IRQ_COUNT               = 3,
    VSF_DMA_IRQ_ALL_BITS_MASK       = VSF_DMA_IRQ_MASK_CPL      |
                                      VSF_DMA_IRQ_MASK_HALF_CPL |
                                      VSF_DMA_IRQ_MASK_ERROR,
};
 
 
#if VSF_DMA_CFG_REIMPLEMENT_CFG_TYPE_CFG == DISABLED
typedef struct vsf_dma_cfg_t {
    vsf_arch_prio_t         prio;
} vsf_dma_cfg_t;
#endif
 
#if VSF_DMA_CFG_REIMPLEMENT_TYPE_CHANNEL_HINT == DISABLED
typedef struct vsf_dma_channel_hint_t {
    uint8_t channel;
    uint8_t request_line;
} vsf_dma_channel_hint_t;
#endif
 
#if VSF_DMA_CFG_REIMPLEMENT_TYPE_CHANNEL_CFG == DISABLED
typedef struct vsf_dma_t vsf_dma_t;
 
typedef void vsf_dma_isr_handler_t(void *target_ptr, vsf_dma_t *dma_ptr, int8_t channel, vsf_dma_irq_mask_t irq_mask);
 
typedef struct vsf_dma_isr_t {
    vsf_dma_isr_handler_t *handler_fn;
    void                  *target_ptr;
} vsf_dma_isr_t;
 
typedef struct vsf_dma_channel_cfg_t {
    vsf_dma_channel_mode_t  mode;
    vsf_dma_isr_t           isr;
    uint8_t                 src_idx;
    uint8_t                 dst_idx;
} vsf_dma_channel_cfg_t;
#endif
 
#if VSF_DMA_CFG_REIMPLEMENT_TYPE_CHANNEL_SG_CFG == DISABLED
typedef struct vsf_dma_channel_sg_desc_t {
    vsf_dma_channel_mode_t mode;    
    uint32_t src_address;           
    uint32_t dst_address;           
    uint32_t count;                 
    uint32_t next;                  
} vsf_dma_channel_sg_desc_t;
#endif
 
#if VSF_DMA_CFG_REIMPLEMENT_TYPE_STATUS == DISABLED
typedef struct vsf_dma_channel_status_t {
    union {
        inherit(vsf_peripheral_status_t)
            struct {
            uint32_t is_busy : 1;
        };
    };
} vsf_dma_channel_status_t;
#endif
 
#if VSF_DMA_CFG_REIMPLEMENT_TYPE_CAPABILITY == DISABLED
typedef struct vsf_dma_capability_t {
#if VSF_DMA_CFG_INHERIT_HAL_CAPABILITY == ENABLED
    inherit(vsf_peripheral_capability_t)
#endif
    vsf_dma_irq_mask_t irq_mask;
 
    uint32_t max_request_count;
    uint8_t channel_count;
} vsf_dma_capability_t;
#endif
 
typedef struct vsf_dma_op_t {
#undef  __VSF_HAL_TEMPLATE_API
#define __VSF_HAL_TEMPLATE_API VSF_HAL_TEMPLATE_API_FP
 
    VSF_DMA_APIS(vsf)
} vsf_dma_op_t;
 
#if VSF_DMA_CFG_MULTI_CLASS == ENABLED
struct vsf_dma_t  {
    const vsf_dma_op_t * op;
};
#endif
 
/*============================ PROTOTYPES ====================================*/
 
extern vsf_err_t vsf_dma_init(vsf_dma_t *dma_ptr, vsf_dma_cfg_t *cfg_ptr);
 
extern void vsf_dma_fini(vsf_dma_t *dma_ptr);
 
extern vsf_dma_capability_t vsf_dma_capability(vsf_dma_t *dma_ptr);
 
extern int8_t vsf_dma_channel_request(vsf_dma_t *dma_ptr, vsf_dma_channel_hint_t *channel_hint_ptr);
 
extern void vsf_dma_channel_release(vsf_dma_t *dma_ptr, uint8_t channel);
 
extern vsf_err_t vsf_dma_channel_config(vsf_dma_t *dma_ptr, uint8_t channel, vsf_dma_channel_cfg_t *cfg_ptr);
 
extern vsf_err_t vsf_dma_channel_start(vsf_dma_t *dma_ptr, uint8_t channel, uint32_t src_address, uint32_t dst_address, uint32_t count);
 
extern vsf_err_t vsf_dma_channel_cancel(vsf_dma_t *dma_ptr, uint8_t channel);
 
extern vsf_err_t vsf_dma_channel_sg_config_desc(vsf_dma_t *dma_ptr, uint8_t channel, vsf_dma_isr_t isr,
            vsf_dma_channel_sg_desc_t *sg_desc_ptr, uint32_t sg_count);
 
extern vsf_err_t vsf_dma_channel_sg_start(vsf_dma_t *dma_ptr, uint8_t channel);
 
extern uint32_t vsf_dma_channel_get_transferred_count(vsf_dma_t *dma_ptr, uint8_t channel);
 
extern vsf_dma_channel_status_t vsf_dma_channel_status(vsf_dma_t *dma_ptr, uint8_t channel);
 
/*============================ MACROFIED FUNCTIONS ===========================*/
 
#if VSF_DMA_CFG_FUNCTION_RENAME == ENABLED
#   define __vsf_dma_t                                              VSF_MCONNECT(VSF_DMA_CFG_PREFIX, _dma_t)
#   define vsf_dma_init(__DMA, ...)                                 VSF_MCONNECT(VSF_DMA_CFG_PREFIX, _dma_init)((__vsf_dma_t *)(__DMA), ##__VA_ARGS__)
#   define vsf_dma_fini(__DMA)                                      VSF_MCONNECT(VSF_DMA_CFG_PREFIX, _dma_fini)((__vsf_dma_t *)(__DMA))
#   define vsf_dma_capability(__DMA)                                VSF_MCONNECT(VSF_DMA_CFG_PREFIX, _dma_capability)((__vsf_dma_t *)(__DMA))
#   define vsf_dma_channel_request(__DMA, ...)                      VSF_MCONNECT(VSF_DMA_CFG_PREFIX, _dma_channel_request)((__vsf_dma_t *)(__DMA), ##__VA_ARGS__)
#   define vsf_dma_channel_release(__DMA, ...)                      VSF_MCONNECT(VSF_DMA_CFG_PREFIX, _dma_channel_release)((__vsf_dma_t *)(__DMA), ##__VA_ARGS__)
#   define vsf_dma_channel_config(__DMA, ...)                       VSF_MCONNECT(VSF_DMA_CFG_PREFIX, _dma_channel_config)((__vsf_dma_t *)(__DMA), ##__VA_ARGS__)
#   define vsf_dma_channel_start(__DMA, ...)                        VSF_MCONNECT(VSF_DMA_CFG_PREFIX, _dma_channel_start)((__vsf_dma_t *)(__DMA), ##__VA_ARGS__)
#   define vsf_dma_channel_sg_config_desc(__DMA, ...)               VSF_MCONNECT(VSF_DMA_CFG_PREFIX, _dma_channel_sg_config_desc)((__vsf_dma_t *)(__DMA), ##__VA_ARGS__)
#   define vsf_dma_channel_sg_start(__DMA, ...)                     VSF_MCONNECT(VSF_DMA_CFG_PREFIX, _dma_channel_sg_start)((__vsf_dma_t *)(__DMA), ##__VA_ARGS__)
#   define vsf_dma_channel_cancel(__DMA, ...)                       VSF_MCONNECT(VSF_DMA_CFG_PREFIX, _dma_channel_cancel)((__vsf_dma_t *)(__DMA), ##__VA_ARGS__)
#   define vsf_dma_channel_get_transferred_count(__DMA, ...)        VSF_MCONNECT(VSF_DMA_CFG_PREFIX, _dma_channel_get_transferred_count)((__vsf_dma_t *)(__DMA), ##__VA_ARGS__)
#   define vsf_dma_channel_status(__DMA, ...)                       VSF_MCONNECT(VSF_DMA_CFG_PREFIX, _dma_channel_status)((__vsf_dma_t *)(__DMA), ##__VA_ARGS__)
#endif
 
#ifdef __cplusplus
}
#endif
 
#endif  /*__VSF_TEMPLATE_DMA_H__*/