ARM TZASC-380 IP provides a mechanism to split memory regions being protected via it into eight equal-sized sub-regions, with a bit setting allowing 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.
This patch enables this support and can be used for SoCs which support such partition of DDR regions.
Details of the 'subregion_disable' register can be viewed here: http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0431c/CJABCFH...
Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Bhupesh Sharma bhupesh.sharma@nxp.com Cc: Ard Biesheuvel ard.biesheuvel@linaro.org --- .../Library/ArmVExpressSecLibCTA9x4/CTA9x4Sec.c | 21 ++++++++++++++------- ArmPlatformPkg/Drivers/ArmTrustZone/ArmTrustZone.c | 5 +++-- 2 files changed, 17 insertions(+), 9 deletions(-)
diff --git a/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressSecLibCTA9x4/CTA9x4Sec.c b/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressSecLibCTA9x4/CTA9x4Sec.c index 6fa0774..d358d65 100644 --- a/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressSecLibCTA9x4/CTA9x4Sec.c +++ b/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressSecLibCTA9x4/CTA9x4Sec.c @@ -72,18 +72,21 @@ ArmPlatformSecTrustzoneInit ( // NOR Flash 0 non secure (BootMon) TZASCSetRegion(ARM_VE_TZASC_BASE,1,TZASC_REGION_ENABLED, ARM_VE_SMB_NOR0_BASE,0, - TZASC_REGION_SIZE_64MB, TZASC_REGION_SECURITY_NSRW); + TZASC_REGION_SIZE_64MB, TZASC_REGION_SECURITY_NSRW, + 0);
// NOR Flash 1. The first half of the NOR Flash1 must be secure for the secure firmware (sec_uefi.bin) if (PcdGetBool (PcdTrustzoneSupport) == TRUE) { //Note: Your OS Kernel must be aware of the secure regions before to enable this region TZASCSetRegion(ARM_VE_TZASC_BASE,2,TZASC_REGION_ENABLED, ARM_VE_SMB_NOR1_BASE + SIZE_32MB,0, - TZASC_REGION_SIZE_32MB, TZASC_REGION_SECURITY_NSRW); + TZASC_REGION_SIZE_32MB, TZASC_REGION_SECURITY_NSRW, + 0); } else { TZASCSetRegion(ARM_VE_TZASC_BASE,2,TZASC_REGION_ENABLED, ARM_VE_SMB_NOR1_BASE,0, - TZASC_REGION_SIZE_64MB, TZASC_REGION_SECURITY_NSRW); + TZASC_REGION_SIZE_64MB, TZASC_REGION_SECURITY_NSRW, + 0); }
// Base of SRAM. Only half of SRAM in Non Secure world @@ -92,22 +95,26 @@ ArmPlatformSecTrustzoneInit ( //Note: Your OS Kernel must be aware of the secure regions before to enable this region TZASCSetRegion(ARM_VE_TZASC_BASE,3,TZASC_REGION_ENABLED, ARM_VE_SMB_SRAM_BASE,0, - TZASC_REGION_SIZE_16MB, TZASC_REGION_SECURITY_NSRW); + TZASC_REGION_SIZE_16MB, TZASC_REGION_SECURITY_NSRW, + 0); } else { TZASCSetRegion(ARM_VE_TZASC_BASE,3,TZASC_REGION_ENABLED, ARM_VE_SMB_SRAM_BASE,0, - TZASC_REGION_SIZE_32MB, TZASC_REGION_SECURITY_NSRW); + TZASC_REGION_SIZE_32MB, TZASC_REGION_SECURITY_NSRW, + 0); }
// Memory Mapped Peripherals. All in non secure world TZASCSetRegion(ARM_VE_TZASC_BASE,4,TZASC_REGION_ENABLED, ARM_VE_SMB_PERIPH_BASE,0, - TZASC_REGION_SIZE_64MB, TZASC_REGION_SECURITY_NSRW); + TZASC_REGION_SIZE_64MB, TZASC_REGION_SECURITY_NSRW, + 0);
// MotherBoard Peripherals and On-chip peripherals. TZASCSetRegion(ARM_VE_TZASC_BASE,5,TZASC_REGION_ENABLED, ARM_VE_SMB_MB_ON_CHIP_PERIPH_BASE,0, - TZASC_REGION_SIZE_256MB, TZASC_REGION_SECURITY_NSRW); + TZASC_REGION_SIZE_256MB, TZASC_REGION_SECURITY_NSRW, + 0); }
/** diff --git a/ArmPlatformPkg/Drivers/ArmTrustZone/ArmTrustZone.c b/ArmPlatformPkg/Drivers/ArmTrustZone/ArmTrustZone.c index 070c0dc..5cd41ef 100644 --- a/ArmPlatformPkg/Drivers/ArmTrustZone/ArmTrustZone.c +++ b/ArmPlatformPkg/Drivers/ArmTrustZone/ArmTrustZone.c @@ -87,7 +87,8 @@ TZASCSetRegion ( IN UINTN LowAddress, IN UINTN HighAddress, IN UINTN Size, - IN UINTN Security + IN UINTN Security, + IN UINTN SubregionDisableMask ) { UINT32* Region; @@ -100,7 +101,7 @@ TZASCSetRegion (
MmioWrite32((UINTN)(Region), LowAddress&0xFFFF8000); MmioWrite32((UINTN)(Region+1), HighAddress); - MmioWrite32((UINTN)(Region+2), ((Security & 0xF) <<28) | ((Size & 0x3F) << 1) | (Enabled & 0x1)); + MmioWrite32((UINTN)(Region+2), ((Security & 0xF) <<28) | ((SubregionDisableMask & 0xFF) << 8) | ((Size & 0x3F) << 1) | (Enabled & 0x1));
return EFI_SUCCESS; }