arch/arm/tcm.rst

2 ARM TCM (Tightly-Coupled Memory) handling in Linux
7 Some ARM SoCs have a so-called TCM (Tightly-Coupled Memory).
8 This is usually just a few (4-64) KiB of RAM inside the ARM
12 Harvard-architecture, so there is an ITCM (instruction TCM)
24 determine if ITCM (bits 1-0) and/or DTCM (bit 17-16) is present
52 - FIQ and other interrupt handlers that need deterministic
55 - Idle loops where all external RAM is set to self-refresh
56   retention mode, so only on-chip RAM is accessible by
60 - Other operations which implies shutting off or reconfiguring
66 - Define the physical address and size of ITCM and DTCM.
68 - Tag functions to be compiled into ITCM.
70 - Tag data and constants to be allocated to DTCM and ITCM.
72 - Have the remaining TCM RAM added to a special
76   device state when shutting off device power domains.