sh: Make kgdb i-cache flushing less inept.

kgdb had its own ranged I-cache flushing routine that attempted to
duplicate the flush_icache_range() functionality, but managed to do
an explicit D-cache writeback & invalidate twice on SH-4. This is
a no-op for SH-3, and the flush_icache_range() semantics already do
what kgdb was feebly attempting to do already, so just move over to
that and kill off the wrapper.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

2 files changed, 4 insertions, 16 deletions

diff --git a/arch/sh/kernel/kgdb_stub.c b/arch/sh/kernel/kgdb_stub.c
index 27f64b92aff0..2fdc700dfd6e 100644
--- a/arch/sh/kernel/kgdb_stub.c
+++ b/arch/sh/kernel/kgdb_stub.c
@@ -609,7 +609,7 @@ static short *get_step_address(void)
         else
                 addr = trap_registers.pc + 2;
 
-        kgdb_flush_icache_range(addr, addr + 2);
+        flush_icache_range(addr, addr + 2);
         return (short *) addr;
 }
 
@@ -632,7 +632,7 @@ static void do_single_step(void)
         *addr = STEP_OPCODE;
 
         /* Flush and return */
-        kgdb_flush_icache_range((long) addr, (long) addr + 2);
+        flush_icache_range((long) addr, (long) addr + 2);
 }
 
 /* Undo a single step */
@@ -642,7 +642,7 @@ static void undo_single_step(void)
         /* Use stepped_address in case we stopped elsewhere */
         if (stepped_opcode != 0) {
                 *(short*)stepped_address = stepped_opcode;
-                kgdb_flush_icache_range(stepped_address, stepped_address + 2);
+                flush_icache_range(stepped_address, stepped_address + 2);
         }
         stepped_opcode = 0;
 }
@@ -728,7 +728,7 @@ static void write_mem_msg(int binary)
                                         ebin_to_mem(ptr, (char*)addr, length);
                                 else
                                         hex_to_mem(ptr, (char*)addr, length);
-                                kgdb_flush_icache_range(addr, addr + length);
+                                flush_icache_range(addr, addr + length);
                                 ptr = 0;
                                 send_ok_msg();
                         }
diff --git a/include/asm-sh/kgdb.h b/include/asm-sh/kgdb.h
index 5334e86ccad6..4bc8cb187d11 100644
--- a/include/asm-sh/kgdb.h
+++ b/include/asm-sh/kgdb.h
@@ -17,7 +17,6 @@
 #define __KGDB_H
 
 #include <asm/ptrace.h>
-#include <asm/cacheflush.h>
 
 /* Same as pt_regs but has vbr in place of syscall_nr */
 struct kgdb_regs {
@@ -67,17 +66,6 @@ extern int     setjmp(jmp_buf __jmpb);
 /* Forced breakpoint */
 #define breakpoint()    __asm__ __volatile__("trapa   #0x3c")
 
-/* KGDB should be able to flush all kernel text space */
-#if defined(CONFIG_CPU_SH4)
-#define kgdb_flush_icache_range(start, end) \
-{                                                                       \
-        __flush_purge_region((void*)(start), (int)(end) - (int)(start));\
-        flush_icache_range((start), (end));                             \
-}
-#else
-#define kgdb_flush_icache_range(start, end)     do { } while (0)
-#endif
-
 /* Taken from sh-stub.c of GDB 4.18 */
 static const char hexchars[] = "0123456789abcdef";