To align with the way normal cacheable memory is mapped, set the
shareable bit for cached accesses performed by the page table walker.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18896
6f19259b-4bc3-4df7-8a09-
765794883524
#define TTBR_RGN_INNER_WRITE_THROUGH BIT0\r
#define TTBR_RGN_INNER_WRITE_BACK_NO_ALLOC (BIT0|BIT6)\r
\r
#define TTBR_RGN_INNER_WRITE_THROUGH BIT0\r
#define TTBR_RGN_INNER_WRITE_BACK_NO_ALLOC (BIT0|BIT6)\r
\r
-#define TTBR_WRITE_THROUGH ( TTBR_RGN_OUTER_WRITE_THROUGH | TTBR_RGN_INNER_WRITE_THROUGH )\r
-#define TTBR_WRITE_BACK_NO_ALLOC ( TTBR_RGN_OUTER_WRITE_BACK_NO_ALLOC | TTBR_RGN_INNER_WRITE_BACK_NO_ALLOC )\r
+#define TTBR_WRITE_THROUGH ( TTBR_RGN_OUTER_WRITE_THROUGH | TTBR_RGN_INNER_WRITE_THROUGH | TTBR_SHAREABLE)\r
+#define TTBR_WRITE_BACK_NO_ALLOC ( TTBR_RGN_OUTER_WRITE_BACK_NO_ALLOC | TTBR_RGN_INNER_WRITE_BACK_NO_ALLOC | TTBR_SHAREABLE)\r
#define TTBR_NON_CACHEABLE ( TTBR_RGN_OUTER_NON_CACHEABLE | TTBR_RGN_INNER_NON_CACHEABLE )\r
#define TTBR_NON_CACHEABLE ( TTBR_RGN_OUTER_NON_CACHEABLE | TTBR_RGN_INNER_NON_CACHEABLE )\r
-#define TTBR_WRITE_BACK_ALLOC ( TTBR_RGN_OUTER_WRITE_BACK_ALLOC | TTBR_RGN_INNER_WRITE_BACK_ALLOC )\r
+#define TTBR_WRITE_BACK_ALLOC ( TTBR_RGN_OUTER_WRITE_BACK_ALLOC | TTBR_RGN_INNER_WRITE_BACK_ALLOC | TTBR_SHAREABLE)\r
\r
\r
#define TRANSLATION_TABLE_SECTION_COUNT 4096\r
\r
\r
#define TRANSLATION_TABLE_SECTION_COUNT 4096\r
return RETURN_UNSUPPORTED;\r
}\r
\r
return RETURN_UNSUPPORTED;\r
}\r
\r
+ if (TTBRAttributes & TTBR_SHAREABLE) {\r
+ //\r
+ // Unlike the S bit in the short descriptors, which implies inner shareable\r
+ // on an implementation that supports two levels, the meaning of the S bit\r
+ // in the TTBR depends on the NOS bit, which defaults to Outer Shareable.\r
+ // However, we should only set this bit after we have confirmed that the\r
+ // implementation supports multiple levels, or else the NOS bit is UNK/SBZP\r
+ //\r
+ if (((ArmReadIdMmfr0 () >> 12) & 0xf) != 0) {\r
+ TTBRAttributes |= TTBR_NOT_OUTER_SHAREABLE;\r
+ }\r
+ }\r
+\r
ArmCleanInvalidateDataCache ();\r
ArmInvalidateInstructionCache ();\r
\r
ArmCleanInvalidateDataCache ();\r
ArmInvalidateInstructionCache ();\r
\r