[PATCH 1/1] BaseTools: enable riscv64 native builds

["Leif Lindholm" <leif@nuviainc.com>]

Add the makefile plumbing and ProcessorBind.h (based on the
AArch64 one) to enable building BaseTools natively on RiscV64.

Cc: Bob Feng <bob.c.feng@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Yuwei Chen <yuwei.chen@intel.com>
Cc: Daniel Schaefer <daniel.schaefer@hpe.com>
Cc: Abner Chang <abner.chang@hpe.com>
Signed-off-by: Leif Lindholm <leif@nuviainc.com>
---
 .../Source/C/Include/RiscV64/ProcessorBind.h  | 102 ++++++++++++++++++
 BaseTools/Source/C/GNUmakefile                |   3 +
 BaseTools/Source/C/Makefiles/header.makefile  |   6 ++
 3 files changed, 111 insertions(+)
 create mode 100644 BaseTools/Source/C/Include/RiscV64/ProcessorBind.h

diff --git a/BaseTools/Source/C/Include/RiscV64/ProcessorBind.h b/BaseTools/Source/C/Include/RiscV64/ProcessorBind.h
new file mode 100644
index 000000000000..bd4b756e0970
--- /dev/null
+++ b/BaseTools/Source/C/Include/RiscV64/ProcessorBind.h
@@ -0,0 +1,102 @@
+/** @file
+  Processor or Compiler specific defines and types for RiscV64.
+
+  Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
+  Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
+  Portions copyright (c) 2013, ARM Ltd. All rights reserved.<BR>
+  Portions copyright (c) 2020, NUVIA inc. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef PROCESSOR_BIND_H__
+#define PROCESSOR_BIND_H__
+
+///
+/// Define the processor type so other code can make processor based choices
+///
+#define MDE_CPU_RISCV64
+
+//
+// Make sure we are using the correct packing rules per EFI specification
+//
+#ifndef __GNUC__
+#pragma pack()
+#endif
+
+//
+// Use ANSI C 2000 stdint.h integer width declarations
+//
+#include <stdint.h>
+typedef uint8_t   BOOLEAN;
+typedef int8_t    INT8;
+typedef uint8_t   UINT8;
+typedef int16_t   INT16;
+typedef uint16_t  UINT16;
+typedef int32_t   INT32;
+typedef uint32_t  UINT32;
+typedef int64_t   INT64;
+typedef uint64_t  UINT64;
+typedef char      CHAR8;
+typedef uint16_t  CHAR16;
+
+///
+/// Unsigned value of native width.  (4 bytes on supported 32-bit processor instructions,
+/// 8 bytes on supported 64-bit processor instructions)
+///
+typedef UINT64  UINTN;
+
+///
+/// Signed value of native width.  (4 bytes on supported 32-bit processor instructions,
+/// 8 bytes on supported 64-bit processor instructions)
+///
+typedef INT64   INTN;
+
+//
+// Processor specific defines
+//
+
+///
+/// A value of native width with the highest bit set.
+///
+#define MAX_BIT      0x8000000000000000
+
+///
+/// A value of native width with the two highest bits set.
+///
+#define MAX_2_BITS   0xC000000000000000
+
+///
+/// The stack alignment required for RISCV64
+///
+#define CPU_STACK_ALIGNMENT  16
+
+//
+// Modifier to ensure that all protocol member functions and EFI intrinsics
+// use the correct C calling convention. All protocol member functions and
+// EFI intrinsics are required to modify their member functions with EFIAPI.
+//
+#define EFIAPI
+
+#if defined(__GNUC__)
+  ///
+  /// For GNU assembly code, .global or .globl can declare global symbols.
+  /// Define this macro to unify the usage.
+  ///
+  #define ASM_GLOBAL .globl
+#endif
+
+/**
+  Return the pointer to the first instruction of a function given a function pointer.
+  On ARM CPU architectures, these two pointer values are the same,
+  so the implementation of this macro is very simple.
+
+  @param  FunctionPointer   A pointer to a function.
+
+  @return The pointer to the first instruction of a function given a function pointer.
+
+**/
+#define FUNCTION_ENTRY_POINT(FunctionPointer) (VOID *)(UINTN)(FunctionPointer)
+
+#endif
diff --git a/BaseTools/Source/C/GNUmakefile b/BaseTools/Source/C/GNUmakefile
index df4eb64ea95e..464f43277455 100644
--- a/BaseTools/Source/C/GNUmakefile
+++ b/BaseTools/Source/C/GNUmakefile
@@ -26,6 +26,9 @@ ifndef HOST_ARCH
   else ifneq (,$(findstring arm,$(uname_m)))
     HOST_ARCH=ARM
   endif
+  ifneq (,$(findstring riscv64,$(uname_m)))
+    HOST_ARCH=RISCV64
+  endif
   ifndef HOST_ARCH
     $(info Could not detected HOST_ARCH from uname results)
     $(error HOST_ARCH is not defined!)
diff --git a/BaseTools/Source/C/Makefiles/header.makefile b/BaseTools/Source/C/Makefiles/header.makefile
index 1c105ee7d434..0df728f32772 100644
--- a/BaseTools/Source/C/Makefiles/header.makefile
+++ b/BaseTools/Source/C/Makefiles/header.makefile
@@ -28,6 +28,9 @@ ifndef HOST_ARCH
   else ifneq (,$(findstring arm,$(uname_m)))
     HOST_ARCH=ARM
   endif
+  ifneq (,$(findstring riscv64,$(uname_m)))
+    HOST_ARCH=RISCV64
+  endif
   ifndef HOST_ARCH
     $(info Could not detected HOST_ARCH from uname results)
     $(error HOST_ARCH is not defined!)
@@ -64,6 +67,9 @@ ARCH_INCLUDE = -I $(MAKEROOT)/Include/Arm/
 else ifeq ($(HOST_ARCH), AARCH64)
 ARCH_INCLUDE = -I $(MAKEROOT)/Include/AArch64/
 
+else ifeq ($(HOST_ARCH), RISCV64)
+ARCH_INCLUDE = -I $(MAKEROOT)/Include/RiscV64/
+
 else
 $(error Bad HOST_ARCH)
 endif
-- 
2.20.1