Module icache 

Instruction cache (ICACHE)

ICACHE speeds up instruction fetches from external memories (e.g. OCTOSPI/XSPI-mapped flash) by caching them in a small internal RAM. It has no independent clock gate — it’s always clocked whenever the CPU is — so unlike most other peripherals, Icache::new() does not call rcc::enable_and_reset.

Supported on STM32U5, U3, WBA, H5, L5 and N6. On N6 the cache doesn’t support memory remapping (no CRR registers), so Icache::enable_remap_region() and Icache::disable_remap_region() aren’t available there — those methods only exist on chips whose ICACHE block has region-remap support.

Structs

Icache

Instruction cache driver.

RegionConfig

Configuration for a memory-remap region.

Enums

Associativity

Cache set-associativity.

Monitor

Which of the two independent hit/miss performance counters to operate on.

OutputBurst

Output burst type used for AHB accesses generated by a remap region.

RegionError

Error returned by super::Icache::enable_remap_region().

RegionSize

Size of a memory-remap region.

TrafficRoute

AHB master whose traffic is routed through a remap region.

Constants

REGION_COUNT

Number of remap regions.