4 ms·
Unless your ARM has LPAE you do. I'm unsure if any ARMv7 chips out there are using LPAE yet? Anybody know? (Memory addressing info from ARM re: LPAE and ARMv8:
by reaperhulk 13y ago
Unless your ARM has LPAE you do. I'm unsure if any ARMv7 chips out there are using LPAE yet? Anybody know?
(Memory addressing info from ARM re: LPAE and ARMv8: http://infocenter.arm.com/help/topic/com.arm.doc.den0001c/DEN0001C_principles_of_arm_memory_maps.pdf http://infocenter.arm.com/help/topic/com.arm.doc.den0001c/DE...)
- masklinn 13y agoThe Cortex A7 and A15 support LPAE.
- mbell 13y agoIf you're addressing more than 4GB of physical memory (actually, ~3 to 3.5GB ish), you're using PAE, 32 vs 64 bit doesn't have any relevance to this. ARMv8 still uses a modified version of LPAE and x86_64 also uses an extension of PAE when running in 64bit mode. I don't know of a 64 bit architecture that doesn't use a PAE style table mapping system, i.e. none are directly addressing physical memory (I'm sure there is an arch out there somewhere that does, just not one I know of one in common use).