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| Kernel Functions for Drivers | ddi_mem_rep_get8(9F) |
| | ddi_mem_rep_get8, ddi_mem_rep_get16, ddi_mem_rep_get32, ddi_mem_rep_get64, ddi_mem_rep_getw, ddi_mem_rep_getl, ddi_mem_rep_getll, ddi_mem_rep_getb - read multiple data from mapped device in the memory space or
allocated DMA memory |
SYNOPSIS
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#include <sys/ddi.h>
#include <sys/sunddi.h>
void ddi_mem_rep_get8(ddi_acc_handle_t handle, uint8_t *host_addr, uint8_t *dev_addr, size_t repcount, uint_t flags); |
| | void ddi_mem_rep_get16(ddi_acc_handle_t handle, uint16_t *host_addr, uint16_t *dev_addr, size_t repcount, uint_t flags); |
| | void ddi_mem_rep_get32(ddi_acc_handle_t handle, uint32_t *host_addr, uint32_t *dev_addr, size_t repcount, uint_t flags); |
| | void ddi_mem_rep_get64(ddi_acc_handle_t handle, uint64_t *host_addr, uint64_t *dev_addr, size_t repcount, uint_t flags); |
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Solaris DDI specific (Solaris DDI).
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handle
- The data access handle returned
from setup calls, such as ddi_regs_map_setup(9F).
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host_addr
- Base host address.
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dev_addr
- Base device address.
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repcount
- Number of data accesses to perform.
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flags
- Device address flags:
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DDI_DEV_AUTOINCR
- Automatically increment the device address, dev_addr, during data accesses.
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DDI_DEV_NO_AUTOINCR
- Do not advance the device address, dev_addr, during data accesses.
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These routines generate multiple reads from memory space or allocated DMA memory. repcount data
is copied from the device address, dev_addr, in memory
space to the host address, host_addr. For each input
datum, the ddi_mem_rep_get8(), ddi_mem_rep_get16(), ddi_mem_rep_get32(), and ddi_mem_rep_get64() 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 will treat the device address, dev_addr, as a memory buffer location on the device and increments
its address on the next input datum. However, when the flags argument is set 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.
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These functions can be called from user, kernel, or interrupt context.
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The functions described in this manual page previously used symbolic
names which specified their data access size; the function names have been
changed so they now specify a fixed-width data size. See the following table
for the new name equivalents:
| Previous Name | New Name |
| ddi_mem_rep_getb | ddi_mem_rep_get8 |
| ddi_mem_rep_getw | ddi_mem_rep_get16 |
| ddi_mem_rep_getl | ddi_mem_rep_get32 |
| ddi_mem_rep_getll | ddi_mem_rep_get64 |
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