MIPS: Add build support for the MIPS R6 ISA

Add build support for the latest revision (R6) of the MIPS ISA.
microMIPS is not yet supported.

Link: http://www.linux-mips.org/archives/linux-mips/2015-01/msg00386.html
Cc: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index b1b2de5..c01e1d4 100644 (file)
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1305,6 +1305,21 @@ config CPU_MIPS32_R2
          specific type of processor in your system, choose those that one
          otherwise CPU_MIPS32_R1 is a safe bet for any MIPS32 system.
 
+config CPU_MIPS32_R6
+       bool "MIPS32 Release 6 (EXPERIMENTAL)"
+       depends on SYS_HAS_CPU_MIPS32_R6
+       select CPU_HAS_PREFETCH
+       select CPU_SUPPORTS_32BIT_KERNEL
+       select CPU_SUPPORTS_HIGHMEM
+       select CPU_SUPPORTS_MSA
+       select HAVE_KVM
+       select MIPS_O32_FP64_SUPPORT
+       help
+         Choose this option to build a kernel for release 6 or later of the
+         MIPS32 architecture.  New MIPS processors, starting with the Warrior
+         family, are based on a MIPS32r6 processor. If you own an older
+         processor, you probably need to select MIPS32r1 or MIPS32r2 instead.
+
 config CPU_MIPS64_R1
        bool "MIPS64 Release 1"
        depends on SYS_HAS_CPU_MIPS64_R1
@@ -1340,6 +1355,20 @@ config CPU_MIPS64_R2
          specific type of processor in your system, choose those that one
          otherwise CPU_MIPS64_R1 is a safe bet for any MIPS64 system.
 
+config CPU_MIPS64_R6
+       bool "MIPS64 Release 6 (EXPERIMENTAL)"
+       depends on SYS_HAS_CPU_MIPS64_R6
+       select CPU_HAS_PREFETCH
+       select CPU_SUPPORTS_32BIT_KERNEL
+       select CPU_SUPPORTS_64BIT_KERNEL
+       select CPU_SUPPORTS_HIGHMEM
+       select CPU_SUPPORTS_MSA
+       help
+         Choose this option to build a kernel for release 6 or later of the
+         MIPS64 architecture.  New MIPS processors, starting with the Warrior
+         family, are based on a MIPS64r6 processor. If you own an older
+         processor, you probably need to select MIPS64r1 or MIPS64r2 instead.
+
 config CPU_R3000
        bool "R3000"
        depends on SYS_HAS_CPU_R3000
@@ -1540,7 +1569,7 @@ endchoice
 config CPU_MIPS32_3_5_FEATURES
        bool "MIPS32 Release 3.5 Features"
        depends on SYS_HAS_CPU_MIPS32_R3_5
-       depends on CPU_MIPS32_R2
+       depends on CPU_MIPS32_R2 || CPU_MIPS32_R6
        help
          Choose this option to build a kernel for release 2 or later of the
          MIPS32 architecture including features from the 3.5 release such as
@@ -1660,12 +1689,18 @@ config SYS_HAS_CPU_MIPS32_R2
 config SYS_HAS_CPU_MIPS32_R3_5
        bool
 
+config SYS_HAS_CPU_MIPS32_R6
+       bool
+
 config SYS_HAS_CPU_MIPS64_R1
        bool
 
 config SYS_HAS_CPU_MIPS64_R2
        bool
 
+config SYS_HAS_CPU_MIPS64_R6
+       bool
+
 config SYS_HAS_CPU_R3000
        bool
 
@@ -1765,11 +1800,11 @@ endmenu
 #
 config CPU_MIPS32
        bool
-       default y if CPU_MIPS32_R1 || CPU_MIPS32_R2
+       default y if CPU_MIPS32_R1 || CPU_MIPS32_R2 || CPU_MIPS32_R6
 
 config CPU_MIPS64
        bool
-       default y if CPU_MIPS64_R1 || CPU_MIPS64_R2
+       default y if CPU_MIPS64_R1 || CPU_MIPS64_R2 || CPU_MIPS64_R6
 
 #
 # These two indicate the revision of the architecture, either Release 1 or Release 2
@@ -1782,6 +1817,10 @@ config CPU_MIPSR2
        bool
        default y if CPU_MIPS32_R2 || CPU_MIPS64_R2 || CPU_CAVIUM_OCTEON
 
+config CPU_MIPSR6
+       bool
+       default y if CPU_MIPS32_R6 || CPU_MIPS64_R6
+
 config EVA
        bool
 
@@ -2149,7 +2188,7 @@ config CPU_HAS_SMARTMIPS
          here.
 
 config CPU_MICROMIPS
-       depends on 32BIT && SYS_SUPPORTS_MICROMIPS
+       depends on 32BIT && SYS_SUPPORTS_MICROMIPS && !CPU_MIPSR6
        bool "microMIPS"
        help
          When this option is enabled the kernel will be built using the

diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index 6181836..aaee9a0 100644 (file)
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -138,10 +138,12 @@ cflags-$(CONFIG_CPU_MIPS32_R1)    += $(call cc-option,-march=mips32,-mips32 -U_MIPS
                        -Wa,-mips32 -Wa,--trap
 cflags-$(CONFIG_CPU_MIPS32_R2) += $(call cc-option,-march=mips32r2,-mips32r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
                        -Wa,-mips32r2 -Wa,--trap
+cflags-$(CONFIG_CPU_MIPS32_R6) += -march=mips32r6 -Wa,--trap
 cflags-$(CONFIG_CPU_MIPS64_R1) += $(call cc-option,-march=mips64,-mips64 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
                        -Wa,-mips64 -Wa,--trap
 cflags-$(CONFIG_CPU_MIPS64_R2) += $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
                        -Wa,-mips64r2 -Wa,--trap
+cflags-$(CONFIG_CPU_MIPS64_R6) += -march=mips64r6 -Wa,--trap
 cflags-$(CONFIG_CPU_R5000)     += -march=r5000 -Wa,--trap
 cflags-$(CONFIG_CPU_R5432)     += $(call cc-option,-march=r5400,-march=r5000) \
                        -Wa,--trap