Make SH port work for packagers that don't differentiate between SH4 and SH4A
Generic bits done by me, SH specific bits implemented by
Nobuhiro Iwamatsu <iwamatsu@nigauri.org>.
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
diff --git a/arch/arch-sh.h b/arch/arch-sh.h
index 08c5fb3..ef4ee03 100644
--- a/arch/arch-sh.h
+++ b/arch/arch-sh.h
@@ -22,13 +22,38 @@
#define nop __asm__ __volatile__ ("nop": : :"memory")
-#if defined(__SH4A__)
-#define mb() __asm__ __volatile__ ("synco": : :"memory")
-#else
-#define mb() __asm__ __volatile__ (" " : : : "memory")
-#endif
+#define mb() \
+ do { \
+ if (arch_flags & ARCH_FLAG_1) \
+ __asm__ __volatile__ ("synco": : :"memory"); \
+ else \
+ __asm__ __volatile__ (" " : : : "memory"); \
+ } while (0)
#define read_barrier() mb()
#define write_barrier() mb()
+#define CPU_HAS_LLSC 0x0040
+
+static inline int arch_init(char *envp[])
+{
+ Elf32_auxv_t *auxv;
+
+ while (*envp++ != NULL)
+ ;
+
+ for (auxv = (Elf32_auxv_t *) envp; auxv->a_type != AT_NULL; auxv++) {
+ if (auxv->a_type == AT_HWCAP) {
+ if (auxv->a_un.a_val & CPU_HAS_LLSC) {
+ arch_flags |= ARCH_FLAG_1;
+ break;
+ }
+ }
+ }
+
+ return 0;
+}
+
+#define ARCH_HAVE_INIT
+
#endif
diff --git a/arch/arch.h b/arch/arch.h
index 8cafa11..16f4c3a 100644
--- a/arch/arch.h
+++ b/arch/arch.h
@@ -58,4 +58,18 @@
#include "../lib/ffz.h"
#endif
+#ifndef ARCH_HAVE_INIT
+static inline int arch_init(char *envp[])
+{
+ return 0;
+}
+#endif
+
+enum {
+ ARCH_FLAG_1 = 1 << 0,
+ ARCH_FLAG_2 = 1 << 1,
+ ARCH_FLAG_3 = 1 << 2,
+ ARCH_FLAG_4 = 1 << 3,
+};
+
#endif