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_ARM_STORAGE_INFO Struct Reference
[Hal]
Storage information. More...
#include <Driver_Storage.h>
Data Fields | |
uint64_t | total_storage |
Total available storage, in bytes. | |
uint32_t | program_unit |
Minimum programming size in bytes. | |
uint32_t | optimal_program_unit |
Optimal programming page-size in bytes. | |
uint32_t | program_cycles |
A measure of endurance for reprogramming. | |
uint32_t | erased_value: 1 |
Contents of erased memory (usually 1 to indicate erased bytes with state 0xFF). | |
uint32_t | memory_mapped: 1 |
This storage device has a mapping onto the processor's memory address space. | |
uint32_t | programmability: 4 |
A value to indicate storage programmability. | |
ARM_STORAGE_SECURITY_FEATURES | security |
ARM_STORAGE_SECURITY_FEATURES |
Detailed Description
Storage information.
This contains device-metadata. It is the return value from calling GetInfo() on the storage driver.
These fields serve a different purpose than the ones contained in ARM_STORAGE_CAPABILITIES, which is another structure containing device-level metadata. ARM_STORAGE_CAPABILITIES describes the API capabilities, whereas ARM_STORAGE_INFO describes the device. Furthermore ARM_STORAGE_CAPABILITIES fits within a single word, and is designed to be passed around by value; ARM_STORAGE_INFO, on the other hand, contains metadata which doesn't fit into a single word and requires the use of pointers to be moved around.
Definition at line 154 of file Driver_Storage.h.
Field Documentation
uint32_t erased_value |
Contents of erased memory (usually 1 to indicate erased bytes with state 0xFF).
Definition at line 167 of file Driver_Storage.h.
uint32_t memory_mapped |
This storage device has a mapping onto the processor's memory address space.
- Note:
- : For a memory-mapped block which isn't erasable but is programmable (i.e. if 'erasable' is set to 0, but 'programmable' is 1), writes should be possible directly to the memory-mapped storage without going through the ProgramData operation.
Definition at line 168 of file Driver_Storage.h.
uint32_t optimal_program_unit |
Optimal programming page-size in bytes.
Some storage controllers have internal buffers into which to receive data. Writing in chunks of 'optimal_program_unit' would achieve maximum programming speed. Applicable only if the 'programmable' attribute is set for the underlying block(s).
Definition at line 161 of file Driver_Storage.h.
uint32_t program_cycles |
A measure of endurance for reprogramming.
Use ARM_STORAGE_PROGRAM_CYCLES_INFINITE for infinite or unknown endurance.
Definition at line 165 of file Driver_Storage.h.
uint32_t program_unit |
Minimum programming size in bytes.
The offset of the start of the program-range should also be aligned with this value. Applicable only if the 'programmable' attribute is set for a block.
- Note:
- : setting program_unit to 0 has the effect of disabling the size and alignment restrictions (setting it to 1 also has the same effect).
Definition at line 156 of file Driver_Storage.h.
uint32_t programmability |
A value to indicate storage programmability.
Definition at line 172 of file Driver_Storage.h.
Definition at line 175 of file Driver_Storage.h.
uint64_t total_storage |
Total available storage, in bytes.
Definition at line 155 of file Driver_Storage.h.
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