diff options
| author | Soby Mathew <soby.mathew@arm.com> | 2016-09-29 14:15:57 +0100 |
|---|---|---|
| committer | Soby Mathew <soby.mathew@arm.com> | 2016-10-14 09:53:22 +0100 |
| commit | b7b0787da84a79733e1ed90a1c15d588c77869e8 (patch) | |
| tree | 9440ea2cb83d4f192e5116f4b65997dce99c7134 /include/lib/aarch64 | |
| parent | b314c9fa88271a5b88cdbcbfd6319405e0a4e30e (diff) | |
Unify SCTLR initialization for AArch32 normal world
The values of CP15BEN, nTWI & nTWE bits in SCTLR_EL1 are architecturally
unknown if EL3 is AARCH64 whereas they reset to 1 if EL3 is AArch32. This
might be a compatibility break for legacy AArch32 normal world software if
these bits are not set to 1 when EL3 is AArch64. This patch enables the
CP15BEN, nTWI and nTWE bits in the SCTLR_EL1 if the lower non-secure EL is
AArch32. This unifies the SCTLR settings for lower non-secure EL in AArch32
mode for both AArch64 and AArch32 builds of Trusted Firmware.
Fixes ARM-software/tf-issues#428
Change-Id: I3152d1580e4869c0ea745c5bd9da765f9c254947
Signed-off-by: Soby Mathew <soby.mathew@arm.com>
Diffstat (limited to 'include/lib/aarch64')
| -rw-r--r-- | include/lib/aarch64/arch.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/lib/aarch64/arch.h b/include/lib/aarch64/arch.h index fb8cbc0b..bef60323 100644 --- a/include/lib/aarch64/arch.h +++ b/include/lib/aarch64/arch.h @@ -155,7 +155,10 @@ #define SCTLR_A_BIT (1 << 1) #define SCTLR_C_BIT (1 << 2) #define SCTLR_SA_BIT (1 << 3) +#define SCTLR_CP15BEN_BIT (1 << 5) #define SCTLR_I_BIT (1 << 12) +#define SCTLR_NTWI_BIT (1 << 16) +#define SCTLR_NTWE_BIT (1 << 18) #define SCTLR_WXN_BIT (1 << 19) #define SCTLR_EE_BIT (1 << 25) |