Altera SoCAL  16.0
The Altera SoC Abstraction Layer (SoCAL) API Reference Manual
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Register : Register 19 (Current Host Receive Descriptor Register) - Current_Host_Receive_Descriptor

Description

The Current Host Receive Descriptor register points to the start address of the current Receive Descriptor read by the DMA.

Register Layout

Bits Access Reset Description
[31:0] R 0x0 Host Receive Descriptor Address Pointer

Field : Host Receive Descriptor Address Pointer - currdesaptr

Cleared on Reset. Pointer updated by the DMA during operation.

Field Access Macros:

#define ALT_EMAC_DMA_CUR_HOST_RX_DESC_CURRDESAPTR_LSB   0
 
#define ALT_EMAC_DMA_CUR_HOST_RX_DESC_CURRDESAPTR_MSB   31
 
#define ALT_EMAC_DMA_CUR_HOST_RX_DESC_CURRDESAPTR_WIDTH   32
 
#define ALT_EMAC_DMA_CUR_HOST_RX_DESC_CURRDESAPTR_SET_MSK   0xffffffff
 
#define ALT_EMAC_DMA_CUR_HOST_RX_DESC_CURRDESAPTR_CLR_MSK   0x00000000
 
#define ALT_EMAC_DMA_CUR_HOST_RX_DESC_CURRDESAPTR_RESET   0x0
 
#define ALT_EMAC_DMA_CUR_HOST_RX_DESC_CURRDESAPTR_GET(value)   (((value) & 0xffffffff) >> 0)
 
#define ALT_EMAC_DMA_CUR_HOST_RX_DESC_CURRDESAPTR_SET(value)   (((value) << 0) & 0xffffffff)
 

Data Structures

struct  ALT_EMAC_DMA_CUR_HOST_RX_DESC_s
 

Macros

#define ALT_EMAC_DMA_CUR_HOST_RX_DESC_OFST   0x4c
 
#define ALT_EMAC_DMA_CUR_HOST_RX_DESC_ADDR(base)   ALT_CAST(void *, (ALT_CAST(char *, (base)) + ALT_EMAC_DMA_CUR_HOST_RX_DESC_OFST))
 

Typedefs

typedef struct
ALT_EMAC_DMA_CUR_HOST_RX_DESC_s 
ALT_EMAC_DMA_CUR_HOST_RX_DESC_t
 

Data Structure Documentation

struct ALT_EMAC_DMA_CUR_HOST_RX_DESC_s

WARNING: The C register and register group struct declarations are provided for convenience and illustrative purposes. They should, however, be used with caution as the C language standard provides no guarantees about the alignment or atomicity of device memory accesses. The recommended practice for writing hardware drivers is to use the SoCAL access macros and alt_read_word() and alt_write_word() functions.

The struct declaration for register ALT_EMAC_DMA_CUR_HOST_RX_DESC.

Data Fields
const uint32_t currdesaptr: 32 Host Receive Descriptor Address Pointer

Macro Definitions

#define ALT_EMAC_DMA_CUR_HOST_RX_DESC_CURRDESAPTR_LSB   0

The Least Significant Bit (LSB) position of the ALT_EMAC_DMA_CUR_HOST_RX_DESC_CURRDESAPTR register field.

#define ALT_EMAC_DMA_CUR_HOST_RX_DESC_CURRDESAPTR_MSB   31

The Most Significant Bit (MSB) position of the ALT_EMAC_DMA_CUR_HOST_RX_DESC_CURRDESAPTR register field.

#define ALT_EMAC_DMA_CUR_HOST_RX_DESC_CURRDESAPTR_WIDTH   32

The width in bits of the ALT_EMAC_DMA_CUR_HOST_RX_DESC_CURRDESAPTR register field.

#define ALT_EMAC_DMA_CUR_HOST_RX_DESC_CURRDESAPTR_SET_MSK   0xffffffff

The mask used to set the ALT_EMAC_DMA_CUR_HOST_RX_DESC_CURRDESAPTR register field value.

#define ALT_EMAC_DMA_CUR_HOST_RX_DESC_CURRDESAPTR_CLR_MSK   0x00000000

The mask used to clear the ALT_EMAC_DMA_CUR_HOST_RX_DESC_CURRDESAPTR register field value.

#define ALT_EMAC_DMA_CUR_HOST_RX_DESC_CURRDESAPTR_RESET   0x0

The reset value of the ALT_EMAC_DMA_CUR_HOST_RX_DESC_CURRDESAPTR register field.

#define ALT_EMAC_DMA_CUR_HOST_RX_DESC_CURRDESAPTR_GET (   value)    (((value) & 0xffffffff) >> 0)

Extracts the ALT_EMAC_DMA_CUR_HOST_RX_DESC_CURRDESAPTR field value from a register.

#define ALT_EMAC_DMA_CUR_HOST_RX_DESC_CURRDESAPTR_SET (   value)    (((value) << 0) & 0xffffffff)

Produces a ALT_EMAC_DMA_CUR_HOST_RX_DESC_CURRDESAPTR register field value suitable for setting the register.

#define ALT_EMAC_DMA_CUR_HOST_RX_DESC_OFST   0x4c

The byte offset of the ALT_EMAC_DMA_CUR_HOST_RX_DESC register from the beginning of the component.

#define ALT_EMAC_DMA_CUR_HOST_RX_DESC_ADDR (   base)    ALT_CAST(void *, (ALT_CAST(char *, (base)) + ALT_EMAC_DMA_CUR_HOST_RX_DESC_OFST))

The address of the ALT_EMAC_DMA_CUR_HOST_RX_DESC register.

Typedef Documentation