libgloss: bfin: add clear_cache_range support (for gcc)

diff --git a/libgloss/ChangeLog b/libgloss/ChangeLog
index edcabe0108d2d17d5e2e4dfd009d8929bf9c8860..5259f75a14e84fbad5e20112119903d5e1f7c4af 100644 (file)
--- a/libgloss/ChangeLog
+++ b/libgloss/ChangeLog
@@ -1,3 +1,11 @@
+2011-12-18  Mike Frysinger  <vapier@gentoo.org>
+
+       * bfin/clear_cache_range.c: New file.
+       * bfin/Makefile.in (SIM_OBJS): Add clear_cache_range.o.
+       (BOARD_OBJS): Likewise.
+       (BOARD_BSP): Set to libbfinbsp.a.
+       (${BOARD_BSP}): New rule.
+
 2011-12-15  Konrad Eisele <konrad@gaisler.com>
 
        * configure.in: Add SPARC LEON support.

diff --git a/libgloss/bfin/Makefile.in b/libgloss/bfin/Makefile.in
index 13af4d27cf980148b3a037c2552110581622f013..7dd2b14aa2b5827b52bb2a0d9a3a98cdb54f2f89 100644 (file)
--- a/libgloss/bfin/Makefile.in
+++ b/libgloss/bfin/Makefile.in
@@ -55,7 +55,7 @@ SIM_SCRIPTS   =
 SIM_LDFLAGS    =
 SIM_BSP                = libsim.a
 SIM_CRT0       = crt0.o
-SIM_OBJS       = syscalls.o
+SIM_OBJS       = syscalls.o clear_cache_range.o
 SIM_TEST       = sim-test
 SIM_INSTALL    = install-sim
 
@@ -71,10 +71,10 @@ BOARD_SCRIPTS       = bfin-common-sc.ld  bfin-common-mc.ld \
        bf561.ld bf561a.ld bf561b.ld bf561m.ld \
        bf592.ld
 BOARD_LDFLAGS  =
-BOARD_BSP      = # We actually use libnosys.a
+BOARD_BSP      = libbfinbsp.a
 BOARD_CRT0S    = basiccrt.o basiccrts.o
 BOARD_CRT0S    += basiccrt561.o basiccrt561s.o basiccrt561b.o
-BOARD_OBJS     =
+BOARD_OBJS     = clear_cache_range.o
 BOARD_TEST     =
 BOARD_INSTALL  = install-board
 
@@ -91,6 +91,10 @@ all: ${SIM_CRT0} ${SIM_BSP} ${BOARD_CRT0S} ${BOARD_BSP}
 #
 # here's where we build the board support packages for each target
 #
+${BOARD_BSP}: ${OBJS} ${BOARD_OBJS}
+       ${AR} ${ARFLAGS} $@ $^
+       ${RANLIB} $@
+
 ${SIM_BSP}: ${OBJS} ${SIM_OBJS}
        ${AR} ${ARFLAGS} ${SIM_BSP} ${SIM_OBJS} ${OBJS}
        ${RANLIB} ${SIM_BSP}

diff --git a/libgloss/bfin/clear_cache_range.c b/libgloss/bfin/clear_cache_range.c
new file mode 100644 (file)
index 0000000..c4173eb
--- /dev/null
+++ b/libgloss/bfin/clear_cache_range.c
@@ -0,0 +1,33 @@
+/*
+ * C library support files for the Blackfin processor
+ *
+ * Copyright (C) 2010 Analog Devices, Inc.
+ *
+ * The authors hereby grant permission to use, copy, modify, distribute,
+ * and license this software and its documentation for any purpose, provided
+ * that existing copyright notices are retained in all copies and that this
+ * notice is included verbatim in any distributions. No written agreement,
+ * license, or royalty fee is required for any of the authorized uses.
+ * Modifications to this software may be copyrighted by their authors
+ * and need not follow the licensing terms described here, provided that
+ * the new terms are clearly indicated on the first page of each file where
+ * they apply.
+ */
+
+/* This is a callback which gcc itself wants to flush jump tables.
+
+   Map it into L1 Text because of anomalies 05-00-0312 and 05-00-0419.  */
+
+__attribute__ ((l1_text))
+void __clear_cache_range (char *beg, char *end)
+{
+  char *ptr = beg;
+  do {
+    __asm__ __volatile__ ("FLUSH [%0++];" : "+a" (ptr) : : "memory");
+  } while (ptr <= end);
+  ptr = beg;
+  __asm__ __volatile__ ("SSYNC;");
+  do {
+    __asm__ __volatile__ ("IFLUSH [%0++];" : "+a" (ptr) : : "memory");
+  } while (ptr <= end);
+}