[edk2-platforms][PATCH v3 1/4] Silicon/ARM/N1SoC: Add platform library implementation

["Pranav Madhu" <pranav.madhu@arm.com>]

From: Deepak Pandey <Deepak.Pandey@arm.com>

Add the initial Arm's Neoverse N1 System-on-Chip platform library
support. This includes the virtual memory map and helper functions for
platform initialization.

Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
Cc: Leif Lindholm <leif@nuviainc.com>
Signed-off-by: Pranav Madhu <pranav.madhu@arm.com>

diff --git a/Silicon/ARM/NeoverseN1Soc/NeoverseN1SocPlatform.dec b/Silicon/ARM/NeoverseN1Soc/NeoverseN1SocPlatform.dec
new file mode 100644
index 000000000000..dba49e6489c0
--- /dev/null
+++ b/Silicon/ARM/NeoverseN1Soc/NeoverseN1SocPlatform.dec
@@ -0,0 +1,27 @@
+#
+#  Copyright (c) 2018 - 2020, ARM Limited. All rights reserved.
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+
+[Defines]
+  DEC_SPECIFICATION              = 0x0001001A
+  PACKAGE_NAME                   = NeoverseN1Soc
+  PACKAGE_GUID                   = b6d2d197-76d0-401f-a3e0-826a26f350c9
+  PACKAGE_VERSION                = 0.1
+
+################################################################################
+#
+# Include Section - list of Include Paths that are provided by this package.
+#                   Comments are used for Keywords and Module Types.
+#
+################################################################################
+[Includes.common]
+  Include                        # Root include for the package
+
+[Guids.common]
+  gArmNeoverseN1SocTokenSpaceGuid = { 0xab93eb78, 0x60d7, 0x4099, { 0xac, 0xeb, 0x6d, 0xb5, 0x02, 0x58, 0x7c, 0x24 } }
+
+[PcdsFixedAtBuild]
+  # Secondary DDR memory
+  gArmNeoverseN1SocTokenSpaceGuid.PcdDramBlock2Base|0|UINT64|0x00000001
diff --git a/Silicon/ARM/NeoverseN1Soc/Library/PlatformLib/PlatformLib.inf b/Silicon/ARM/NeoverseN1Soc/Library/PlatformLib/PlatformLib.inf
new file mode 100644
index 000000000000..b2ea10756071
--- /dev/null
+++ b/Silicon/ARM/NeoverseN1Soc/Library/PlatformLib/PlatformLib.inf
@@ -0,0 +1,43 @@
+## @file
+#
+#  Copyright (c) 2018-2020, ARM Limited. All rights reserved.
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x0001001A
+  BASE_NAME                      = ArmNeoverseN1SocLib
+  FILE_GUID                      = 3d0eafcf-abc1-43d8-9269-709bb24f9d21
+  MODULE_TYPE                    = BASE
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = ArmPlatformLib
+
+[Packages]
+  ArmPkg/ArmPkg.dec
+  ArmPlatformPkg/ArmPlatformPkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+  MdePkg/MdePkg.dec
+  Silicon/ARM/NeoverseN1Soc/NeoverseN1SocPlatform.dec
+
+[Sources.common]
+  PlatformLibMem.c
+  PlatformLib.c
+
+[Sources.AARCH64]
+  AArch64/Helper.S | GCC
+
+[FixedPcd]
+  gArmTokenSpaceGuid.PcdSystemMemoryBase
+  gArmTokenSpaceGuid.PcdSystemMemorySize
+  gArmTokenSpaceGuid.PcdArmPrimaryCore
+  gArmTokenSpaceGuid.PcdArmPrimaryCoreMask
+
+  gArmNeoverseN1SocTokenSpaceGuid.PcdDramBlock2Base
+
+[Guids]
+  gEfiHobListGuid          ## CONSUMES  ## SystemTable
+
+[Ppis]
+  gArmMpCoreInfoPpiGuid
diff --git a/Silicon/ARM/NeoverseN1Soc/Include/NeoverseN1SocPlatform.h b/Silicon/ARM/NeoverseN1Soc/Include/NeoverseN1SocPlatform.h
new file mode 100644
index 000000000000..c47039c24293
--- /dev/null
+++ b/Silicon/ARM/NeoverseN1Soc/Include/NeoverseN1SocPlatform.h
@@ -0,0 +1,68 @@
+/** @file
+*
+* Copyright (c) 2018 - 2020, ARM Limited. All rights reserved.
+*
+* SPDX-License-Identifier: BSD-2-Clause-Patent
+*
+**/
+
+#ifndef __NEOVERSEN1SOC_PLATFORM_H__
+#define __NEOVERSEN1SOC_PLATFORM_H__
+
+#define NEOVERSEN1SOC_DRAM_BLOCK1_SIZE               SIZE_2GB
+
+//******************************************************************************
+// Platform Memory Map
+//******************************************************************************
+
+// SubSystem Peripherals - UART0
+#define NEOVERSEN1SOC_UART0_BASE                     0x2A400000
+#define NEOVERSEN1SOC_UART0_SZ                       SIZE_64KB
+
+// SubSystem Peripherals - UART1
+#define NEOVERSEN1SOC_UART1_BASE                     0x2A410000
+#define NEOVERSEN1SOC_UART1_SZ                       SIZE_64KB
+
+// SubSystem Peripherals - Generic Watchdog
+#define NEOVERSEN1SOC_GENERIC_WDOG_BASE              0x2A440000
+#define NEOVERSEN1SOC_GENERIC_WDOG_SZ                SIZE_128KB
+
+// SubSystem Peripherals - GIC(600)
+#define NEOVERSEN1SOC_GIC_BASE                       0x30000000
+#define NEOVERSEN1SOC_GICR_BASE                      0x300C0000
+#define NEOVERSEN1SOC_GIC_SZ                         SIZE_256KB
+#define NEOVERSEN1SOC_GICR_SZ                        SIZE_1MB
+
+// SubSystem non-secure SRAM
+#define NEOVERSEN1SOC_NON_SECURE_SRAM_BASE           0x06000000
+#define NEOVERSEN1SOC_NON_SECURE_SRAM_SZ             SIZE_64KB
+
+// AXI Expansion peripherals
+#define NEOVERSEN1SOC_EXP_PERIPH_BASE0               0x1C000000
+#define NEOVERSEN1SOC_EXP_PERIPH_BASE0_SZ            0x1300000
+
+// Base address to a structure of type NEOVERSEN1SOC_PLAT_INFO which is
+// pre-populated by a earlier boot stage
+#define NEOVERSEN1SOC_PLAT_INFO_STRUCT_BASE          (NEOVERSEN1SOC_NON_SECURE_SRAM_BASE + \
+                                                      0x00008000)
+
+/*
+ * Platform information structure stored in non secure SRAM. Platform
+ * information are passed from the trusted firmware with the below structure
+ * format. The elements of NEOVERSEN1SOC_PLAT_INFO should be always in sync
+ * with the lower level firmware.
+ */
+#pragma pack(1)
+typedef struct {
+  /*! 0 - Single Chip, 1 - Chip to Chip (C2C) */
+  BOOLEAN MultichipMode;
+  /*! Slave count in C2C mode */
+  UINT8   SlaveCount;
+  /*! Local DDR memory size in GigaBytes */
+  UINT8   LocalDdrSize;
+  /*! Remote DDR memory size in GigaBytes */
+  UINT8   RemoteDdrSize;
+} NEOVERSEN1SOC_PLAT_INFO;
+#pragma pack()
+
+#endif
diff --git a/Silicon/ARM/NeoverseN1Soc/Library/PlatformLib/PlatformLib.c b/Silicon/ARM/NeoverseN1Soc/Library/PlatformLib/PlatformLib.c
new file mode 100644
index 000000000000..6cb699b29716
--- /dev/null
+++ b/Silicon/ARM/NeoverseN1Soc/Library/PlatformLib/PlatformLib.c
@@ -0,0 +1,67 @@
+/** @file
+*
+*  Copyright (c) 2018-2020, ARM Limited. All rights reserved.
+*
+*  SPDX-License-Identifier: BSD-2-Clause-Patent
+*
+**/
+
+#include <Library/ArmPlatformLib.h>
+#include <Library/BaseLib.h>
+#include <Ppi/ArmMpCoreInfo.h>
+
+STATIC ARM_CORE_INFO mCoreInfoTable[] = {
+  { 0x0, 0x0 }, // Cluster 0, Core 0
+  { 0x0, 0x1 }, // Cluster 0, Core 1
+  { 0x1, 0x0 }, // Cluster 1, Core 0
+  { 0x1, 0x1 }  // Cluster 1, Core 1
+};
+
+EFI_BOOT_MODE
+ArmPlatformGetBootMode (
+  VOID
+  )
+{
+  return BOOT_WITH_FULL_CONFIGURATION;
+}
+
+RETURN_STATUS
+ArmPlatformInitialize (
+  IN UINTN                      MpId
+  )
+{
+  return RETURN_SUCCESS;
+}
+
+EFI_STATUS
+PrePeiCoreGetMpCoreInfo (
+  OUT UINTN                     *CoreCount,
+  OUT ARM_CORE_INFO             **ArmCoreTable
+  )
+{
+  *CoreCount = sizeof (mCoreInfoTable) / sizeof (ARM_CORE_INFO);
+  *ArmCoreTable = mCoreInfoTable;
+  return EFI_SUCCESS;
+}
+
+STATIC ARM_MP_CORE_INFO_PPI mMpCoreInfoPpi = {
+  PrePeiCoreGetMpCoreInfo
+};
+
+EFI_PEI_PPI_DESCRIPTOR gPlatformPpiTable[] = {
+  {
+    EFI_PEI_PPI_DESCRIPTOR_PPI,
+    &gArmMpCoreInfoPpiGuid,
+    &mMpCoreInfoPpi
+  }
+};
+
+VOID
+ArmPlatformGetPlatformPpiList (
+  OUT UINTN                     *PpiListSize,
+  OUT EFI_PEI_PPI_DESCRIPTOR    **PpiList
+  )
+{
+  *PpiListSize = sizeof (gPlatformPpiTable);
+  *PpiList = gPlatformPpiTable;
+}
diff --git a/Silicon/ARM/NeoverseN1Soc/Library/PlatformLib/PlatformLibMem.c b/Silicon/ARM/NeoverseN1Soc/Library/PlatformLib/PlatformLibMem.c
new file mode 100644
index 000000000000..0234748fa72e
--- /dev/null
+++ b/Silicon/ARM/NeoverseN1Soc/Library/PlatformLib/PlatformLibMem.c
@@ -0,0 +1,126 @@
+/** @file
+*
+*  Copyright (c) 2018 - 2020, ARM Limited. All rights reserved.
+*
+*  SPDX-License-Identifier: BSD-2-Clause-Patent
+*
+**/
+
+#include <Library/ArmPlatformLib.h>
+#include <Library/DebugLib.h>
+#include <Library/HobLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <NeoverseN1SocPlatform.h>
+
+// The total number of descriptors, including the final "end-of-table" descriptor.
+#define MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS 9
+
+/**
+  Returns the Virtual Memory Map of the platform.
+
+  This Virtual Memory Map is used by MemoryInitPei Module to initialize the MMU
+  on your platform.
+
+  @param[out] VirtualMemoryMap Array of ARM_MEMORY_REGION_DESCRIPTOR describing
+                               a Physical-to-Virtual Memory mapping. This array
+                               must be ended by a zero-filled entry.
+**/
+VOID
+ArmPlatformGetVirtualMemoryMap (
+  IN ARM_MEMORY_REGION_DESCRIPTOR **VirtualMemoryMap
+  )
+{
+  UINTN                         Index = 0;
+  ARM_MEMORY_REGION_DESCRIPTOR  *VirtualMemoryTable;
+  EFI_RESOURCE_ATTRIBUTE_TYPE   ResourceAttributes;
+  NEOVERSEN1SOC_PLAT_INFO       *PlatInfo;
+  UINT64                        DramBlock2Size;
+
+  PlatInfo = (NEOVERSEN1SOC_PLAT_INFO *)NEOVERSEN1SOC_PLAT_INFO_STRUCT_BASE;
+  DramBlock2Size = ((UINT64)(PlatInfo->LocalDdrSize -
+                             NEOVERSEN1SOC_DRAM_BLOCK1_SIZE / SIZE_1GB) *
+                            (UINT64)SIZE_1GB);
+
+  ResourceAttributes =
+    EFI_RESOURCE_ATTRIBUTE_PRESENT |
+    EFI_RESOURCE_ATTRIBUTE_INITIALIZED |
+    EFI_RESOURCE_ATTRIBUTE_WRITE_COMBINEABLE |
+    EFI_RESOURCE_ATTRIBUTE_WRITE_THROUGH_CACHEABLE |
+    EFI_RESOURCE_ATTRIBUTE_WRITE_BACK_CACHEABLE |
+    EFI_RESOURCE_ATTRIBUTE_TESTED;
+
+  BuildResourceDescriptorHob (
+    EFI_RESOURCE_SYSTEM_MEMORY,
+    ResourceAttributes,
+    FixedPcdGet64 (PcdDramBlock2Base),
+    DramBlock2Size);
+
+  ASSERT (VirtualMemoryMap != NULL);
+  Index = 0;
+
+  VirtualMemoryTable = (ARM_MEMORY_REGION_DESCRIPTOR *)AllocatePages
+                       (EFI_SIZE_TO_PAGES (sizeof (ARM_MEMORY_REGION_DESCRIPTOR) *
+                        MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS));
+  if (VirtualMemoryTable == NULL) {
+    return;
+  }
+
+  // SubSystem Peripherals - Generic Watchdog
+  VirtualMemoryTable[Index].PhysicalBase    = NEOVERSEN1SOC_GENERIC_WDOG_BASE;
+  VirtualMemoryTable[Index].VirtualBase     = NEOVERSEN1SOC_GENERIC_WDOG_BASE;
+  VirtualMemoryTable[Index].Length          = NEOVERSEN1SOC_GENERIC_WDOG_SZ;
+  VirtualMemoryTable[Index].Attributes      = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
+
+  // SubSystem Peripherals - GIC-600
+  VirtualMemoryTable[++Index].PhysicalBase  = NEOVERSEN1SOC_GIC_BASE;
+  VirtualMemoryTable[Index].VirtualBase     = NEOVERSEN1SOC_GIC_BASE;
+  VirtualMemoryTable[Index].Length          = NEOVERSEN1SOC_GIC_SZ;
+  VirtualMemoryTable[Index].Attributes      = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
+
+  // SubSystem Peripherals - GICR-600
+  VirtualMemoryTable[++Index].PhysicalBase  = NEOVERSEN1SOC_GICR_BASE;
+  VirtualMemoryTable[Index].VirtualBase     = NEOVERSEN1SOC_GICR_BASE;
+  VirtualMemoryTable[Index].Length          = NEOVERSEN1SOC_GICR_SZ;
+  VirtualMemoryTable[Index].Attributes      = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
+
+  // OnChip non-secure SRAM
+  VirtualMemoryTable[++Index].PhysicalBase  = NEOVERSEN1SOC_NON_SECURE_SRAM_BASE;
+  VirtualMemoryTable[Index].VirtualBase     = NEOVERSEN1SOC_NON_SECURE_SRAM_BASE;
+  VirtualMemoryTable[Index].Length          = NEOVERSEN1SOC_NON_SECURE_SRAM_SZ;
+  VirtualMemoryTable[Index].Attributes      = ARM_MEMORY_REGION_ATTRIBUTE_UNCACHED_UNBUFFERED;
+
+  // SubSystem Pheripherals - UART0
+  VirtualMemoryTable[++Index].PhysicalBase  = NEOVERSEN1SOC_UART0_BASE;
+  VirtualMemoryTable[Index].VirtualBase     = NEOVERSEN1SOC_UART0_BASE;
+  VirtualMemoryTable[Index].Length          = NEOVERSEN1SOC_UART0_SZ;
+  VirtualMemoryTable[Index].Attributes      = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
+
+  // DDR Primary (2GB)
+  VirtualMemoryTable[++Index].PhysicalBase  = PcdGet64 (PcdSystemMemoryBase);
+  VirtualMemoryTable[Index].VirtualBase     = PcdGet64 (PcdSystemMemoryBase);
+  VirtualMemoryTable[Index].Length          = PcdGet64 (PcdSystemMemorySize);
+  VirtualMemoryTable[Index].Attributes      = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
+
+  // DDR Secondary
+  VirtualMemoryTable[++Index].PhysicalBase  = PcdGet64 (PcdDramBlock2Base);
+  VirtualMemoryTable[Index].VirtualBase     = PcdGet64 (PcdDramBlock2Base);
+  VirtualMemoryTable[Index].Length          = DramBlock2Size;
+  VirtualMemoryTable[Index].Attributes      = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
+
+  // Expansion Peripherals
+  VirtualMemoryTable[++Index].PhysicalBase  = NEOVERSEN1SOC_EXP_PERIPH_BASE0;
+  VirtualMemoryTable[Index].VirtualBase     = NEOVERSEN1SOC_EXP_PERIPH_BASE0;
+  VirtualMemoryTable[Index].Length          = NEOVERSEN1SOC_EXP_PERIPH_BASE0_SZ;
+  VirtualMemoryTable[Index].Attributes      = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
+
+  // End of Table
+  VirtualMemoryTable[++Index].PhysicalBase  = 0;
+  VirtualMemoryTable[Index].VirtualBase     = 0;
+  VirtualMemoryTable[Index].Length          = 0;
+  VirtualMemoryTable[Index].Attributes      = (ARM_MEMORY_REGION_ATTRIBUTES)0;
+
+  ASSERT((Index) < MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS);
+  DEBUG ((DEBUG_INIT, "Virtual Memory Table setup complete.\n"));
+
+  *VirtualMemoryMap = VirtualMemoryTable;
+}
diff --git a/Silicon/ARM/NeoverseN1Soc/Library/PlatformLib/AArch64/Helper.S b/Silicon/ARM/NeoverseN1Soc/Library/PlatformLib/AArch64/Helper.S
new file mode 100644
index 000000000000..8d2069dea837
--- /dev/null
+++ b/Silicon/ARM/NeoverseN1Soc/Library/PlatformLib/AArch64/Helper.S
@@ -0,0 +1,84 @@
+/** @file
+*
+*  Copyright (c) 2019 - 2020, ARM Limited. All rights reserved.
+*
+*  SPDX-License-Identifier: BSD-2-Clause-Patent
+*
+**/
+
+#include <AsmMacroIoLibV8.h>
+#include <Library/ArmLib.h>
+
+.text
+.align 3
+
+GCC_ASM_EXPORT(ArmPlatformPeiBootAction)
+GCC_ASM_EXPORT(ArmPlatformGetCorePosition)
+GCC_ASM_EXPORT(ArmPlatformGetPrimaryCoreMpId)
+GCC_ASM_EXPORT(ArmPlatformIsPrimaryCore)
+
+//
+// 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.
+//
+ASM_PFX(ArmPlatformPeiBootAction):
+  ret
+
+//
+// Return the core position from the value of its MpId register
+//
+// This function returns core position from the position 0 in the processor.
+// This function might be called from assembler before any stack is set.
+//
+// @return   Return the core position
+//
+//UINTN
+//ArmPlatformGetCorePosition (
+//  IN UINTN MpId
+//  );
+// With this function: CorePos = (ClusterId * 2) + CoreId
+ASM_PFX(ArmPlatformGetCorePosition):
+  and   x1, x0, #ARM_CORE_MASK
+  and   x0, x0, #ARM_CLUSTER_MASK
+  add   x0, x1, x0, LSR #7
+  ret
+
+//
+// Return the MpId of the primary core
+//
+// This function returns the MpId of the primary core.
+// This function might be called from assembler before any stack is set.
+//
+// @return   Return the MpId of the primary core
+//
+//UINTN
+//ArmPlatformGetPrimaryCoreMpId (
+//  VOID
+//  );
+ASM_PFX(ArmPlatformGetPrimaryCoreMpId):
+  MOV32 (w0, FixedPcdGet32(PcdArmPrimaryCore))
+  ret
+
+//
+// Return a non-zero value if the callee is the primary core
+//
+// This function returns a non-zero value if the callee is the primary core.
+// Primary core is the core responsible to initialize hardware and run UEFI.
+// This function might be called from assembler before any stack is set.
+//
+//  @return   Return a non-zero value if the callee is the primary core.
+//
+//UINTN
+//ArmPlatformIsPrimaryCore (
+//  IN UINTN MpId
+//  );
+ASM_PFX(ArmPlatformIsPrimaryCore):
+  MOV32 (w1, FixedPcdGet32(PcdArmPrimaryCoreMask))
+  and   x0, x0, x1
+  MOV32 (w1, FixedPcdGet32(PcdArmPrimaryCore))
+  cmp   w0, w1
+  cset  x0, eq
+  ret
-- 
2.7.4