From b8e3bfb51667df1a1661f2ecacf518e8bdf14960 Mon Sep 17 00:00:00 2001 From: wilson Date: Tue, 2 Jan 2018 20:34:01 +0000 Subject: [PATCH] RISC-V: Fix for icache flush issue on multicore processors. gcc/ * config/riscv/linux.h (ICACHE_FLUSH_FUNC): New. * config/riscv/riscv.md (clear_cache): Use it. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@256109 138bc75d-0d04-0410-961f-82ee72b054a4 --- gcc/ChangeLog | 5 +++++ gcc/config/riscv/linux.h | 2 ++ gcc/config/riscv/riscv.md | 6 ++++++ 3 files changed, 13 insertions(+) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 403c46ff344..4e5323c68fe 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2018-01-02 Andrew Waterman + + * config/riscv/linux.h (ICACHE_FLUSH_FUNC): New. + * config/riscv/riscv.md (clear_cache): Use it. + 2018-01-02 Artyom Skrobov * web.c: Remove out-of-date comment. diff --git a/gcc/config/riscv/linux.h b/gcc/config/riscv/linux.h index 6c7e3c4e819..4b2f7b6e1fd 100644 --- a/gcc/config/riscv/linux.h +++ b/gcc/config/riscv/linux.h @@ -45,6 +45,8 @@ along with GCC; see the file COPYING3. If not see #define LIB_SPEC GNU_USER_TARGET_LIB_SPEC " -latomic " #endif +#define ICACHE_FLUSH_FUNC "__riscv_flush_icache" + #define LINK_SPEC "\ -melf" XLEN_SPEC "lriscv \ %{shared} \ diff --git a/gcc/config/riscv/riscv.md b/gcc/config/riscv/riscv.md index db4fed48e53..dab54ad2738 100644 --- a/gcc/config/riscv/riscv.md +++ b/gcc/config/riscv/riscv.md @@ -1456,7 +1456,13 @@ (match_operand 1 "pmode_register_operand")] "" { +#ifdef ICACHE_FLUSH_FUNC + emit_library_call (gen_rtx_SYMBOL_REF (Pmode, ICACHE_FLUSH_FUNC), + LCT_NORMAL, VOIDmode, operands[0], Pmode, + operands[1], Pmode, const0_rtx, Pmode); +#else emit_insn (gen_fence_i ()); +#endif DONE; }) -- 2.11.4.GIT