ARC: Add support for generic HS48 processor

For the HS48 processor, BR currently builds with -mcpu=hs4x_rel31 which
generates suboptimal code as it inhibits delay slot and back-back ST and so on.

Enable a new variant to build with -mcpu=hs4x for normal codegen.

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
[yann.morin.1998@free.fr:
  - simplify dependencies on MMU page size
  - wrap long lines
]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

diff --git a/arch/Config.in.arc b/arch/Config.in.arc
index fdfafda31c7229913d5e5a5264e76956405088e4..f7a6d920b50df35c34e15a02f56ed7fab9a30e67 100644 (file)
--- a/arch/Config.in.arc
+++ b/arch/Config.in.arc
@@ -39,9 +39,14 @@ config BR2_archs38_full
 
 config BR2_archs4x_rel31
        bool "ARC HS48 rel 31"
+       help
+          Build for HS48 release 3.1
+
+config BR2_archs4x
+       bool "ARC HS48"
        help
           Latest release of HS48 processor
-          - Dual- and quad multiply and MC oprations
+          - Dual and Quad multiply and MAC operations
           - Double-precision FPU
 
 endchoice
@@ -49,7 +54,9 @@ endchoice
 # Choice of atomic instructions presence
 config BR2_ARC_ATOMIC_EXT
        bool "Atomic extension (LLOCK/SCOND instructions)"
-       default y if BR2_arc770d || BR2_archs38 || BR2_archs38_64mpy || BR2_archs38_full || BR2_archs4x_rel31
+       default y if BR2_arc770d
+       default y if BR2_archs38 || BR2_archs38_64mpy || BR2_archs38_full
+       default y if BR2_archs4x_rel31 || BR2_archs4x
 
 config BR2_ARCH
        default "arc"   if BR2_arcle
@@ -70,10 +77,12 @@ config BR2_GCC_TARGET_CPU
        default "hs38"   if BR2_archs38_64mpy
        default "hs38_linux"     if BR2_archs38_full
        default "hs4x_rel31"     if BR2_archs4x_rel31
+       default "hs4x"   if BR2_archs4x
 
 config BR2_READELF_ARCH_NAME
        default "ARCompact"     if BR2_arc750d || BR2_arc770d
-       default "ARCv2"         if BR2_archs38 || BR2_archs38_64mpy || BR2_archs38_full || BR2_archs4x_rel31
+       default "ARCv2"         if BR2_archs38 || BR2_archs38_64mpy || BR2_archs38_full
+       default "ARCv2"         if BR2_archs4x_rel31 || BR2_archs4x
 
 choice
        prompt "MMU Page Size"
@@ -93,7 +102,7 @@ choice
 
 config BR2_ARC_PAGE_SIZE_4K
        bool "4KB"
-       depends on BR2_arc770d || BR2_archs38 || BR2_archs38_64mpy || BR2_archs38_full || BR2_archs4x_rel31
+       depends on !BR2_arc750d
 
 config BR2_ARC_PAGE_SIZE_8K
        bool "8KB"
@@ -103,7 +112,7 @@ config BR2_ARC_PAGE_SIZE_8K
 
 config BR2_ARC_PAGE_SIZE_16K
        bool "16KB"
-       depends on BR2_arc770d || BR2_archs38 || BR2_archs38_64mpy || BR2_archs38_full || BR2_archs4x_rel31
+       depends on !BR2_arc750d
 
 endchoice