8326235: RISC-V: Size CodeCache for short calls encoding

Reviewed-by: fyang, tonyp

src/hotspot/cpu/riscv/globalDefinitions_riscv.hpp

@@ -50,6 +50,9 @@ const bool CCallingConventionRequiresIntsAsLongs = false;
 
 #define USE_POINTERS_TO_REGISTER_IMPL_ARRAY
 
+// auipc useable for all cc -> cc calls and jumps
+#define CODE_CACHE_SIZE_LIMIT ((2*G)-(2*K))
+
 // The expected size in bytes of a cache line.
 #define DEFAULT_CACHE_LINE_SIZE 64
 

src/hotspot/share/utilities/globalDefinitions.hpp

@@ -581,13 +581,16 @@ extern uint64_t OopEncodingHeapMax;
 
 // Machine dependent stuff
 
+#include CPU_HEADER(globalDefinitions)
+
 // The maximum size of the code cache.  Can be overridden by targets.
+#ifndef CODE_CACHE_SIZE_LIMIT
 #define CODE_CACHE_SIZE_LIMIT (2*G)
+#endif
+
 // Allow targets to reduce the default size of the code cache.
 #define CODE_CACHE_DEFAULT_LIMIT CODE_CACHE_SIZE_LIMIT
 
-#include CPU_HEADER(globalDefinitions)
-
 // To assure the IRIW property on processors that are not multiple copy
 // atomic, sync instructions must be issued between volatile reads to
 // assure their ordering, instead of after volatile stores.