generic: groundwork for RISC-V

Add build infrastructure for RISC-V.

Signed-off-by: Zoltan HERPAI <wigyori@uid0.hu>
(cherry picked from commit 50c05f6cd721130701cbbc77a75d2e090259c4e5)

diff --git a/include/kernel.mk b/include/kernel.mk
index c657bf5d82e7f02ad07bb5f3faa820f8dae90909..b1ae42534dc434a4c4012b9c76ebd8153e92f4e3 100644 (file)
--- a/include/kernel.mk
+++ b/include/kernel.mk
@@ -90,6 +90,8 @@ else ifneq (,$(findstring $(ARCH) , mipsel mips64 mips64el ))
   LINUX_KARCH := mips
 else ifneq (,$(findstring $(ARCH) , powerpc64 ))
   LINUX_KARCH := powerpc
+else ifneq (,$(findstring $(ARCH) , riscv64 ))
+  LINUX_KARCH := riscv
 else ifneq (,$(findstring $(ARCH) , sh2 sh3 sh4 ))
   LINUX_KARCH := sh
 else ifneq (,$(findstring $(ARCH) , i386 x86_64 ))

diff --git a/include/site/riscv64 b/include/site/riscv64
new file mode 100644 (file)
index 0000000..c5aa9c5
--- /dev/null
+++ b/include/site/riscv64
@@ -0,0 +1,30 @@
+#!/bin/sh
+. $TOPDIR/include/site/linux
+ac_cv_c_littleendian=${ac_cv_c_littleendian=yes}
+ac_cv_c_bigendian=${ac_cv_c_bigendian=no}
+
+ac_cv_sizeof___int64=8
+ac_cv_sizeof_char=1
+ac_cv_sizeof_int=4
+ac_cv_sizeof_int16_t=2
+ac_cv_sizeof_int32_t=4
+ac_cv_sizeof_int64_t=8
+ac_cv_sizeof_long_int=8
+ac_cv_sizeof_long_long=8
+ac_cv_sizeof_long=8
+ac_cv_sizeof_off_t=8
+ac_cv_sizeof_short_int=2
+ac_cv_sizeof_short=2
+ac_cv_sizeof_size_t=8
+ac_cv_sizeof_ssize_t=8
+ac_cv_sizeof_u_int16_t=2
+ac_cv_sizeof_u_int32_t=4
+ac_cv_sizeof_u_int64_t=8
+ac_cv_sizeof_uint16_t=2
+ac_cv_sizeof_uint32_t=4
+ac_cv_sizeof_uint64_t=8
+ac_cv_sizeof_unsigned_int=4
+ac_cv_sizeof_unsigned_long=8
+ac_cv_sizeof_unsigned_long_long=8
+ac_cv_sizeof_unsigned_short=2
+ac_cv_sizeof_void_p=8

diff --git a/include/target.mk b/include/target.mk
index 992f95534442c58d1a6de5dfe22a7271a2c5283f..b5e3e7ff6fdeca22c917c7024d53914d32d82a7e 100644 (file)
--- a/include/target.mk
+++ b/include/target.mk
@@ -260,6 +260,10 @@ ifeq ($(DUMP),1)
     CPU_CFLAGS_arc700 = -mcpu=arc700
     CPU_CFLAGS_archs = -mcpu=archs
   endif
+  ifeq ($(ARCH),riscv64)
+    CPU_TYPE ?= riscv64
+    CPU_CFLAGS_riscv64:=-mabi=lp64d -march=rv64imafdc
+  endif
   ifneq ($(CPU_TYPE),)
     ifndef CPU_CFLAGS_$(CPU_TYPE)
       $(warning CPU_TYPE "$(CPU_TYPE)" doesn't correspond to a known type)

diff --git a/target/Config.in b/target/Config.in
index a6b3351a61886a63544e64cce036e3275c4f2cdf..ac0f1f9826bf9dec5523f55f9b685619cf27db09 100644 (file)
--- a/target/Config.in
+++ b/target/Config.in
@@ -184,6 +184,10 @@ config powerpc64
        select ARCH_64BIT
        bool
 
+config riscv64
+       select ARCH_64BIT
+       bool
+
 config sh3
        bool
 
@@ -223,6 +227,7 @@ config ARCH
        default "mips64el"  if mips64el
        default "powerpc"   if powerpc
        default "powerpc64" if powerpc64
+       default "riscv64"   if riscv64
        default "sh3"       if sh3
        default "sh3eb"     if sh3eb
        default "sh4"       if sh4