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Add workaround for Cortex-A7 errata 814220
Jeffrey Lee authored 
Detail:
  s/ARMops, s/HAL - Errata 814220 states that the Cortex-A7 set/way cache maintenance operations violate the usual operation ordering rules, such that an L2 maintenance operation which is started after an L1 operation may actually complete before it, causing data corruption if the L1 data was to be evicted to the L2 entry. Implement the suggested workaround of performing a DSB when switching cache levels, rather than just at the end of the combined L1+L2 group of operations.
Admin:
  Tested on Raspberry Pi 2


Version 5.35, 4.79.2.257. Tagged as 'Kernel-5_35-4_79_2_257'
94c601f8
Name Last commit Last update
..
AMBControl Perform extra TLB maintenance on ARMv6+. Other cache/TLB maintenance tweaks.
PMF Add Raspberry Pi 2 support
vdu Use symbol for GraphicsV op
ARM600 Disable ProcessTransfer code indefinitely
ARMops Add workaround for Cortex-A7 errata 814220
Arthur2 Make OS_GSTrans be more sensible about what it treats as system variables
Arthur3 Review of Internation switch
ArthurSWIs Add OS_Memory 24 implementation. Change OS_ValidateAddress to use it. Fix kernel leaving the physical access MB in a messy state. Try and protect against infinite abort loops caused by bad environment handlers.
ChangeDyn Perform extra TLB maintenance on ARMv6+. Other cache/TLB maintenance tweaks.
Convrsions Add OS_Memory 24 implementation. Change OS_ValidateAddress to use it. Fix kernel leaving the physical access MB in a messy state. Try and protect against infinite abort loops caused by bad environment handlers.
End Commit of kernel as featured in release 5.00.
ExtraSWIs Add zero page relocation support
FlashROM 32-bit Kernel.
GetAll Add ARMops for PL310 L2 cache controller
HAL Add workaround for Cortex-A7 errata 814220
HeapMan Sort out SetBorder
HeapSort Add compressed ROM support. Make more use of ARMv5+ instructions. Other misc tweaks.
KbdResA1 32-bit Kernel.
KbdResPC Add zero page relocation support
KbdResRCMM Reimplement enhancements to kernel Dynamic Area support from
Kernel Add OS_Memory 24 implementation. Change OS_ValidateAddress to use it. Fix kernel leaving the physical access MB in a messy state. Try and protect against infinite abort loops caused by bad environment handlers.
LibKern More HAL work. IOMD HAL work in progress. Lots of my own little build scripts. Don't touch this.
MEMC1 Import from cleaned 360 CD
MEMC2 Import from cleaned 360 CD
MOSDict Import from cleaned 360 CD
MemInfo
Middle
ModHand
MoreComms
MoreSWIs
Morris
MsgCode
NewIRQs
NewReset
Oscli
SWINaming
Super1
SysComms
TickEvents
UnSqueeze
Utility
VMSAv6