diff options
| author | Bhupesh Sharma <bhupesh.linux@gmail.com> | 2017-01-20 17:10:45 +0530 |
|---|---|---|
| committer | Leif Lindholm <leif.lindholm@linaro.org> | 2017-01-26 14:31:37 +0000 |
| commit | 465663e9f128428323e6c6e4431dd15ac287a24c (patch) | |
| tree | 6c3d31fd6232a6f7be01d56dfce400fb37982ee4 /ArmPlatformPkg/Include | |
| parent | c1b0828b3ba8fa203033ede0c3329c0d5573719e (diff) | |
| download | edk2-465663e9f128428323e6c6e4431dd15ac287a24c.tar.gz | |
ArmPlatformPkg/TZASC: Allow specifying subregions to be disabled
ARM TZASC-380 IP provides a mechanism to split memory regions being
protected via it into eight equal-sized sub-regions. A bit-setting
allows the corresponding subregion to be disabled.
Several NXP/FSL SoCs support the TZASC-380 IP block and allow
the DDR connected via the TZASC to be partitioned into regions
having different security settings and also allow subregions
to be disabled.
This patch enables this support and can be used for SoCs which
support such a partition of DDR regions.
Details of the 'subregion_disable' register can be viewed here:
http://infocenter.arm.com/help/topic/com.arm.doc.ddi0431c/CHDIGDCI.html
Cc: Leif Lindholm <leif.lindholm@linaro.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Bhupesh Sharma <bhupesh.sharma@nxp.com>
[bhupesh.linux@gmail.com : Added gmail ID as NXP one is no longer valid]
Signed-off-by: Bhupesh Sharma <bhupesh.linux@gmail.com>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
Diffstat (limited to 'ArmPlatformPkg/Include')
| -rw-r--r-- | ArmPlatformPkg/Include/Drivers/ArmTrustzone.h | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/ArmPlatformPkg/Include/Drivers/ArmTrustzone.h b/ArmPlatformPkg/Include/Drivers/ArmTrustzone.h index 78e98aad53..827b5cd568 100644 --- a/ArmPlatformPkg/Include/Drivers/ArmTrustzone.h +++ b/ArmPlatformPkg/Include/Drivers/ArmTrustzone.h @@ -71,6 +71,22 @@ TZPCClearDecProtBits ( #define TZASC_REGION_SECURITY_NSW 1
#define TZASC_REGION_SECURITY_NSRW (TZASC_REGION_SECURITY_NSR|TZASC_REGION_SECURITY_NSW)
+/* Some useful masks */
+#define TZASC_REGION_SETUP_LO_ADDR_MASK 0xFFFF8000
+
+#define TZASC_REGION_ATTR_SECURITY_MASK 0xF
+#define TZASC_REGION_ATTR_SUBREG_DIS_MASK 0xFF
+#define TZASC_REGION_ATTR_SIZE_MASK 0x3F
+#define TZASC_REGION_ATTR_EN_MASK 0x1
+
+#define TZASC_REGION_SETUP_LO_ADDR(x) ((x) & TZASC_REGION_SETUP_LO_ADDR_MASK)
+
+#define TZASC_REGION_ATTR_SECURITY(x) (((x) & TZASC_REGION_ATTR_SECURITY_MASK) << 28)
+#define TZASC_REGION_ATTR_SUBREG_DISABLE(x) \
+ (((x) & TZASC_REGION_ATTR_SUBREG_DIS_MASK) << 8)
+#define TZASC_REGION_ATTR_SIZE(x) (((x) & TZASC_REGION_ATTR_SIZE_MASK) << 1)
+#define TZASC_REGION_ATTR_ENABLE(x) ((x) & TZASC_REGION_ATTR_EN_MASK)
+
/**
FIXME: Need documentation
**/
@@ -82,7 +98,8 @@ TZASCSetRegion ( IN UINTN LowAddress,
IN UINTN HighAddress,
IN UINTN Size,
- IN UINTN Security
+ IN UINTN Security,
+ IN UINTN SubregionDisableMask
);
#endif
|