On SGI platforms, the trusted firmware executes prior to the SEC phase. It supplies to the SEC phase a pointer to a fdt, that contains platform specific information such as part number and config number of the SGI platform. The platform code that executes during the SEC phase creates a PPI that allows access to other PEIMs to obtain a copy of the fdt pointer.
Further, during the PEI phase, a Platform ID PEIM installs a Platform ID HOB. The Platform ID HOB can be used by DXE drivers to identify the platform it is executing on. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Chandni Cherukuri <chandni.cheruk...@arm.com> --- Platform/ARM/SgiPkg/Include/Ppi/SgiPlatformId.h | 23 ++++ Platform/ARM/SgiPkg/Include/SgiPlatform.h | 13 +++ Platform/ARM/SgiPkg/Library/PlatformLib/AArch64/Helper.S | 13 ++- Platform/ARM/SgiPkg/Library/PlatformLib/PlatformLib.c | 10 ++ Platform/ARM/SgiPkg/Library/PlatformLib/PlatformLib.inf | 3 + Platform/ARM/SgiPkg/Library/SgiPlatformPei/SgiPlatformPei.inf | 40 +++++++ Platform/ARM/SgiPkg/Library/SgiPlatformPei/SgiPlatformPeim.c | 112 ++++++++++++++++++++ Platform/ARM/SgiPkg/SgiPlatform.dec | 5 + 8 files changed, 215 insertions(+), 4 deletions(-) diff --git a/Platform/ARM/SgiPkg/Include/Ppi/SgiPlatformId.h b/Platform/ARM/SgiPkg/Include/Ppi/SgiPlatformId.h new file mode 100644 index 0000000..dbc982d --- /dev/null +++ b/Platform/ARM/SgiPkg/Include/Ppi/SgiPlatformId.h @@ -0,0 +1,23 @@ +/** @file +* +* Copyright (c) 2018, ARM Limited. All rights reserved. +* +* This program and the accompanying materials are licensed and made available +* under the terms and conditions of the BSD License which accompanies this +* distribution. The full text of the license may be found at +* http://opensource.org/licenses/bsd-license.php +* +* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, +* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. +* +**/ + +#ifndef SGI_PLATFORMID_PPI_ +#define SGI_PLATFORMID_PPI_ + +//HwConfig DT structure +typedef struct { + UINT64 HwConfigDtAddr; +} SGI_HW_CONFIG_INFO_PPI; + +#endif diff --git a/Platform/ARM/SgiPkg/Include/SgiPlatform.h b/Platform/ARM/SgiPkg/Include/SgiPlatform.h index 00ca7e9..1454018 100644 --- a/Platform/ARM/SgiPkg/Include/SgiPlatform.h +++ b/Platform/ARM/SgiPkg/Include/SgiPlatform.h @@ -68,4 +68,17 @@ #define SGI_SYSPH_SYS_REG_FLASH 0x4C #define SGI_SYSPH_SYS_REG_FLASH_RWEN 0x1 +// SGI575_VERSION values +#define SGI575_CONF_NUM 0x3 +#define SGI575_PART_NUM 0x783 + +#define SGI_CONFIG_MASK 0x0F +#define SGI_CONFIG_SHIFT 0x1C +#define SGI_PART_NUM_MASK 0xFFF + +// ARM platform description data. +typedef struct { + UINTN PlatformId; +} SGI_PLATFORM_DESCRIPTOR; + #endif // __SGI_PLATFORM_H__ diff --git a/Platform/ARM/SgiPkg/Library/PlatformLib/AArch64/Helper.S b/Platform/ARM/SgiPkg/Library/PlatformLib/AArch64/Helper.S index dab6c77..3662266 100644 --- a/Platform/ARM/SgiPkg/Library/PlatformLib/AArch64/Helper.S +++ b/Platform/ARM/SgiPkg/Library/PlatformLib/AArch64/Helper.S @@ -22,15 +22,20 @@ GCC_ASM_EXPORT(ArmPlatformPeiBootAction) GCC_ASM_EXPORT(ArmPlatformGetCorePosition) GCC_ASM_EXPORT(ArmPlatformGetPrimaryCoreMpId) GCC_ASM_EXPORT(ArmPlatformIsPrimaryCore) +GCC_ASM_IMPORT(HwConfigDtBlob) // // First platform specific function to be called in the PEI phase // -// This function is actually the first function called by the PrePi -// or PrePeiCore modules. It allows to retrieve arguments passed to -// the UEFI firmware through the CPU registers. -// +// The trusted firmware passed the hw config DT blob in x1 register. +// Keep a copy of it in a global variable. +//VOID +//ArmPlatformPeiBootAction ( +// VOID +// ); ASM_PFX(ArmPlatformPeiBootAction): + adr x10, HwConfigDtBlob + str x1, [x10] ret //UINTN diff --git a/Platform/ARM/SgiPkg/Library/PlatformLib/PlatformLib.c b/Platform/ARM/SgiPkg/Library/PlatformLib/PlatformLib.c index ea3201a..13bb423 100644 --- a/Platform/ARM/SgiPkg/Library/PlatformLib/PlatformLib.c +++ b/Platform/ARM/SgiPkg/Library/PlatformLib/PlatformLib.c @@ -15,6 +15,10 @@ #include <Library/ArmPlatformLib.h> #include <Library/BaseLib.h> #include <Ppi/ArmMpCoreInfo.h> +#include <Ppi/SgiPlatformId.h> + +UINT64 HwConfigDtBlob; +STATIC SGI_HW_CONFIG_INFO_PPI mHwConfigDtInfoPpi; STATIC ARM_CORE_INFO mCoreInfoTable[] = { { @@ -36,6 +40,7 @@ ArmPlatformInitialize ( IN UINTN MpId ) { + mHwConfigDtInfoPpi.HwConfigDtAddr = HwConfigDtBlob; return RETURN_SUCCESS; } @@ -59,6 +64,11 @@ EFI_PEI_PPI_DESCRIPTOR gPlatformPpiTable[] = { EFI_PEI_PPI_DESCRIPTOR_PPI, &gArmMpCoreInfoPpiGuid, &mMpCoreInfoPpi + }, + { + EFI_PEI_PPI_DESCRIPTOR_PPI, + &gHwConfigDtInfoPpiGuid, + &mHwConfigDtInfoPpi } }; diff --git a/Platform/ARM/SgiPkg/Library/PlatformLib/PlatformLib.inf b/Platform/ARM/SgiPkg/Library/PlatformLib/PlatformLib.inf index 42e14d5..5d4bf72 100644 --- a/Platform/ARM/SgiPkg/Library/PlatformLib/PlatformLib.inf +++ b/Platform/ARM/SgiPkg/Library/PlatformLib/PlatformLib.inf @@ -61,7 +61,10 @@ gEfiMdePkgTokenSpaceGuid.PcdPciExpressBaseAddress [Guids] + gArmSgiPlatformIdDescriptorGuid gEfiHobListGuid ## CONSUMES ## SystemTable + gFdtTableGuid [Ppis] gArmMpCoreInfoPpiGuid + gHwConfigDtInfoPpiGuid diff --git a/Platform/ARM/SgiPkg/Library/SgiPlatformPei/SgiPlatformPei.inf b/Platform/ARM/SgiPkg/Library/SgiPlatformPei/SgiPlatformPei.inf new file mode 100644 index 0000000..a7c718b --- /dev/null +++ b/Platform/ARM/SgiPkg/Library/SgiPlatformPei/SgiPlatformPei.inf @@ -0,0 +1,40 @@ +# +# Copyright (c) 2018, ARM Limited. All rights reserved. +# +# This program and the accompanying materials are licensed and made available +# under the terms and conditions of the BSD License which accompanies this +# distribution. The full text of the license may be found at +# http://opensource.org/licenses/bsd-license.php +# +# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, +# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. +# + +[Defines] + INF_VERSION = 0x0001001A + BASE_NAME = SgiPlatformIdPei + FILE_GUID = a9936f3e-6a1b-11e8-8ce0-fffe69b86863 + MODULE_TYPE = PEIM + VERSION_STRING = 1.0 + ENTRY_POINT = SgiPlatformPeim + +[Packages] + EmbeddedPkg/EmbeddedPkg.dec + MdePkg/MdePkg.dec + Platform/ARM/SgiPkg/SgiPlatform.dec + +[LibraryClasses] + FdtLib + PeimEntryPoint + +[Sources] + SgiPlatformPeim.c + +[Guids] + gArmSgiPlatformIdDescriptorGuid + +[Ppis] + gHwConfigDtInfoPpiGuid + +[Depex] + gHwConfigDtInfoPpiGuid diff --git a/Platform/ARM/SgiPkg/Library/SgiPlatformPei/SgiPlatformPeim.c b/Platform/ARM/SgiPkg/Library/SgiPlatformPei/SgiPlatformPeim.c new file mode 100644 index 0000000..92504db --- /dev/null +++ b/Platform/ARM/SgiPkg/Library/SgiPlatformPei/SgiPlatformPeim.c @@ -0,0 +1,112 @@ +/** @file +* +* Copyright (c) 2018, ARM Limited. All rights reserved. +* +* This program and the accompanying materials are licensed and made available +* under the terms and conditions of the BSD License which accompanies this +* distribution. The full text of the license may be found at +* http://opensource.org/licenses/bsd-license.php +* +* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, +* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. +* +**/ + +#include <Library/DebugLib.h> +#include <Library/HobLib.h> +#include <Library/PeimEntryPoint.h> +#include <Library/PeiServicesLib.h> +#include <libfdt.h> +#include <Ppi/SgiPlatformId.h> +#include <SgiPlatform.h> + +/** + + This function returns the Platform ID of the platform + + This functions locates the HwConfig PPI and gets the base address of HW CONFIG + DT from which the platform ID is obtained using FDT helper functions + + @return returns the platform ID on success else returns 0 on error + +**/ + +STATIC +UINT32 +GetSgiPlatformId ( + VOID +) +{ + CONST UINT32 *Property; + INT32 Offset; + CONST VOID *HwCfgDtBlob; + SGI_HW_CONFIG_INFO_PPI *HwConfigInfoPpi; + EFI_STATUS Status; + + Status = PeiServicesLocatePpi (&gHwConfigDtInfoPpiGuid, 0, NULL, + (VOID**)&HwConfigInfoPpi); + if (EFI_ERROR (Status)) { + DEBUG ((DEBUG_ERROR, + "PeiServicesLocatePpi failed with error %r\n", Status)); + return 0; + } + + HwCfgDtBlob = (VOID *)(HwConfigInfoPpi->HwConfigDtAddr); + if (fdt_check_header (HwCfgDtBlob) != 0) { + DEBUG ((DEBUG_ERROR, "Invalid DTB file %p passed\n", HwCfgDtBlob)); + return 0; + } + + Offset = fdt_subnode_offset (HwCfgDtBlob, 0, "system-id"); + if (Offset == -FDT_ERR_NOTFOUND) { + DEBUG ((DEBUG_ERROR, "Invalid DTB : system-id node not found\n")); + return 0; + } + + Property = fdt_getprop (HwCfgDtBlob, Offset, "platform-id", NULL); + if (Property == NULL) { + DEBUG ((DEBUG_ERROR, "Platform Id is NULL\n")); + return 0; + } + + return fdt32_to_cpu (*Property); +} + +/** + + This function creates a Platform ID HOB and assigns PlatformId as the + HobData + + @return asserts on error and returns EFI_INVALID_PARAMETER. On success + returns EFI_SUCCESS + +**/ +EFI_STATUS +EFIAPI +SgiPlatformPeim ( + IN EFI_PEI_FILE_HANDLE FileHandle, + IN CONST EFI_PEI_SERVICES **PeiServices +) +{ + SGI_PLATFORM_DESCRIPTOR *HobData; + + //Create platform descriptor HOB + HobData = (SGI_PLATFORM_DESCRIPTOR *)BuildGuidHob ( + &gArmSgiPlatformIdDescriptorGuid, + sizeof (SGI_PLATFORM_DESCRIPTOR)); + + //Get the platform id from the platform specific hw_config device tree + if (HobData == NULL) { + DEBUG ((DEBUG_ERROR, "Platform HOB is NULL\n")); + ASSERT (FALSE); + return EFI_OUT_OF_RESOURCES; + } + + HobData->PlatformId = GetSgiPlatformId (); + if (HobData->PlatformId == 0) { + ASSERT (FALSE); + return EFI_INVALID_PARAMETER; + } + + return EFI_SUCCESS; +} diff --git a/Platform/ARM/SgiPkg/SgiPlatform.dec b/Platform/ARM/SgiPkg/SgiPlatform.dec index d995937..ea9f6c5 100644 --- a/Platform/ARM/SgiPkg/SgiPlatform.dec +++ b/Platform/ARM/SgiPkg/SgiPlatform.dec @@ -29,9 +29,14 @@ Include # Root include for the package [Guids.common] + # ARM Sgi Platform ID descriptor + gArmSgiPlatformIdDescriptorGuid = { 0xf56f152a, 0xad2a, 0x11e6, { 0xb1, 0xa7, 0x00, 0x50, 0x56, 0x3c, 0x44, 0xcc } } gArmSgiTokenSpaceGuid = { 0x577d6941, 0xaea1, 0x40b4, { 0x90, 0x93, 0x2a, 0x86, 0x61, 0x72, 0x5a, 0x57 } } gSgi575AcpiTablesiFileGuid = { 0xc712719a, 0x0aaf, 0x438c, { 0x9c, 0xdd, 0x35, 0xab, 0x4d, 0x60, 0x20, 0x7d } } [PcdsFeatureFlag.common] # Set this PCD to TRUE to enable virtio support. gArmSgiTokenSpaceGuid.PcdVirtioSupported|TRUE|BOOLEAN|0x00000001 + +[Ppis] + gHwConfigDtInfoPpiGuid = { 0x6f606eb3, 0x9123, 0x4e15, { 0xa8, 0x9b, 0x0f, 0xac, 0x66, 0xef, 0xd0, 0x17 } } -- 2.7.4 _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel
