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Name

Synopsis

void ddi_rep_getb(ddi_acc_handle_t handle, uchar_t *host_addr, uchar_t *dev_addr, uint_t repcount, ulong_t flags);

void ddi_rep_getw(ddi_acc_handle_t handle, ushort_t *host_addr, ushort_t *dev_addr, uint_t repcount, ulong_t flags);

void ddi_rep_getl(ddi_acc_handle_t handle, ulong_t *host_addr, ulong_t *dev_addr, uint_t repcount, ulong_t flags);

void ddi_rep_getll(ddi_acc_handle_t handle, unsigned long long *host_addr, unsigned long long *dev_addr, uint_t repcount, ulong_t flags);

Interface Level

Arguments

handle

The data access handle returned from setup calls, such as ddi_regs_map_setup(9F) .

host_addr

Base host address.

dev_addr

Base device address.

repcount

Number of data accesses to perform.

flags

Device address flags:

DDI_DEV_AUTOINCR

Automatically increment the device address, dev_addr, during data accesses.

DDI_DEV_NO_AUTOINCR

Do not advance the device address, dev_addr, during data accesses.

Description

These routines generate multiple reads from the mapped memory or device register. repcount data is copied from the device address, dev_addr, to the host address, host_addr. For each input datum, the ddi_rep_getb(), ddi_rep_getw(), ddi_rep_getl(), and ddi_rep_getll() functions read 8 bits, 16 bits, 32 bits and 64 bits of data, respectively, from the device address, dev_addr. dev_addr and host_addr must be aligned to the datum boundary described by the function.

Each individual datum will automatically be translated to maintain a consistent view between the host and the device based on the encoded information in the data access handle. The translation may involve byte-swapping if the host and the device have incompatible endian characteristics.

When the flags argument is set to DDI_DEV_AUTOINCR , these functions treat the device address, dev_addr, as a memory buffer location on the device and increment its address on the next input datum. However, when the flags argument is to DDI_DEV_NO_AUTOINCR , the same device address will be used for every datum access. For example, this flag may be useful when reading from a data register.

Return Values

Context

See Also

Table of Contents

• Name
• Synopsis
• Interface Level
• Arguments
• Description
• Return Values
• Context
• See Also