diff options
| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2015-11-18 15:58:46 +0000 |
|---|---|---|
| committer | abiesheuvel <abiesheuvel@Edk2> | 2015-11-18 15:58:46 +0000 |
| commit | 2ea66ed9f9ea18cbe2681baaad29ce47ea9918a1 (patch) | |
| tree | 98cf8d66c3bf5f796bbbaebb23866fce7187f0de /ArmPkg/Library | |
| parent | 63dbd629649a4c5ccf83243e9482a4e0d092b422 (diff) | |
| download | edk2-platforms-2ea66ed9f9ea18cbe2681baaad29ce47ea9918a1.tar.xz | |
ArmPkg/ArmV7Lib: add function to test for presence of MP extensions
Some MMU manipulation is dependent on the presence of the multiprocessing
extensions. So add a function that returns this information.
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@18895 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'ArmPkg/Library')
| -rw-r--r-- | ArmPkg/Library/ArmLib/ArmV7/ArmLibSupportV7.S | 7 | ||||
| -rw-r--r-- | ArmPkg/Library/ArmLib/ArmV7/ArmLibSupportV7.asm | 7 | ||||
| -rw-r--r-- | ArmPkg/Library/ArmLib/ArmV7/ArmV7Lib.h | 6 |
3 files changed, 20 insertions, 0 deletions
diff --git a/ArmPkg/Library/ArmLib/ArmV7/ArmLibSupportV7.S b/ArmPkg/Library/ArmLib/ArmV7/ArmLibSupportV7.S index b94239f785..d9e3c86b69 100644 --- a/ArmPkg/Library/ArmLib/ArmV7/ArmLibSupportV7.S +++ b/ArmPkg/Library/ArmLib/ArmV7/ArmLibSupportV7.S @@ -19,6 +19,7 @@ .align 2
GCC_ASM_EXPORT(ArmIsMpCore)
+GCC_ASM_EXPORT(ArmHasMpExtensions)
GCC_ASM_EXPORT(ArmEnableAsynchronousAbort)
GCC_ASM_EXPORT(ArmDisableAsynchronousAbort)
GCC_ASM_EXPORT(ArmEnableIrq)
@@ -44,6 +45,12 @@ ASM_PFX(ArmIsMpCore): movne R0, #0
bx LR
+ASM_PFX(ArmHasMpExtensions):
+ mrc p15,0,R0,c0,c0,5
+ // Get Multiprocessing extension (bit31)
+ lsr R0, R0, #31
+ bx LR
+
ASM_PFX(ArmEnableAsynchronousAbort):
cpsie a
isb
diff --git a/ArmPkg/Library/ArmLib/ArmV7/ArmLibSupportV7.asm b/ArmPkg/Library/ArmLib/ArmV7/ArmLibSupportV7.asm index 82daa3ce16..8179232253 100644 --- a/ArmPkg/Library/ArmLib/ArmV7/ArmLibSupportV7.asm +++ b/ArmPkg/Library/ArmLib/ArmV7/ArmLibSupportV7.asm @@ -15,6 +15,7 @@ EXPORT ArmIsMpCore
+ EXPORT ArmHasMpExtensions
EXPORT ArmEnableAsynchronousAbort
EXPORT ArmDisableAsynchronousAbort
EXPORT ArmEnableIrq
@@ -43,6 +44,12 @@ ArmIsMpCore movne R0, #0
bx LR
+ArmHasMpExtensions
+ mrc p15,0,R0,c0,c0,5
+ // Get Multiprocessing extension (bit31)
+ lsr R0, R0, #31
+ bx LR
+
ArmEnableAsynchronousAbort
cpsie a
isb
diff --git a/ArmPkg/Library/ArmLib/ArmV7/ArmV7Lib.h b/ArmPkg/Library/ArmLib/ArmV7/ArmV7Lib.h index df770cf7d7..e138613ca5 100644 --- a/ArmPkg/Library/ArmLib/ArmV7/ArmV7Lib.h +++ b/ArmPkg/Library/ArmLib/ArmV7/ArmV7Lib.h @@ -28,5 +28,11 @@ ArmReadIdMmfr0 ( VOID
);
+BOOLEAN
+EFIAPI
+ArmHasMpExtensions (
+ VOID
+ );
+
#endif // __ARM_V7_LIB_H__
|