From 465663e9f128428323e6c6e4431dd15ac287a24c Mon Sep 17 00:00:00 2001 From: Bhupesh Sharma Date: Fri, 20 Jan 2017 17:10:45 +0530 Subject: 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 Cc: Ard Biesheuvel Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Bhupesh Sharma [bhupesh.linux@gmail.com : Added gmail ID as NXP one is no longer valid] Signed-off-by: Bhupesh Sharma Reviewed-by: Leif Lindholm --- .../Library/ArmVExpressSecLibCTA9x4/CTA9x4Sec.c | 14 +++++++------- ArmPlatformPkg/Drivers/ArmTrustZone/ArmTrustZone.c | 13 ++++++++++--- ArmPlatformPkg/Include/Drivers/ArmTrustzone.h | 19 ++++++++++++++++++- 3 files changed, 35 insertions(+), 11 deletions(-) diff --git a/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressSecLibCTA9x4/CTA9x4Sec.c b/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressSecLibCTA9x4/CTA9x4Sec.c index 6fa0774f59..42d731ea98 100644 --- a/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressSecLibCTA9x4/CTA9x4Sec.c +++ b/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressSecLibCTA9x4/CTA9x4Sec.c @@ -72,18 +72,18 @@ 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 +92,22 @@ 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 070c0dcb5d..1f002198e5 100644 --- a/ArmPlatformPkg/Drivers/ArmTrustZone/ArmTrustZone.c +++ b/ArmPlatformPkg/Drivers/ArmTrustZone/ArmTrustZone.c @@ -87,20 +87,27 @@ TZASCSetRegion ( IN UINTN LowAddress, IN UINTN HighAddress, IN UINTN Size, - IN UINTN Security + IN UINTN Security, + IN UINTN SubregionDisableMask ) { UINT32* Region; + UINT32 RegionAttributes; if (RegionId > TZASCGetNumRegions(TzascBase)) { return EFI_INVALID_PARAMETER; } + RegionAttributes = TZASC_REGION_ATTR_SECURITY(Security) | + TZASC_REGION_ATTR_SUBREG_DISABLE(SubregionDisableMask) | + TZASC_REGION_ATTR_SIZE(Size) | + TZASC_REGION_ATTR_ENABLE(Enabled); + Region = (UINT32*)((UINTN)TzascBase + TZASC_REGIONS_REG + (RegionId * 0x10)); - MmioWrite32((UINTN)(Region), LowAddress&0xFFFF8000); + MmioWrite32((UINTN)(Region), TZASC_REGION_SETUP_LO_ADDR(LowAddress)); MmioWrite32((UINTN)(Region+1), HighAddress); - MmioWrite32((UINTN)(Region+2), ((Security & 0xF) <<28) | ((Size & 0x3F) << 1) | (Enabled & 0x1)); + MmioWrite32((UINTN)(Region+2), RegionAttributes); return EFI_SUCCESS; } 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 -- cgit v1.2.3