ARC: kgdb support

Signed-off-by: Mischa Jonker <mjonker@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Jason Wessel <jason.wessel@windriver.com>
Acked-by: Jason Wessel <jason.wessel@windriver.com>

1 files changed, 61 insertions, 0 deletions

diff --git a/arch/arc/include/asm/kgdb.h b/arch/arc/include/asm/kgdb.h
new file mode 100644
index 000000000000..f3c4934f0ca9
--- /dev/null
+++ b/arch/arc/include/asm/kgdb.h
@@ -0,0 +1,61 @@
+/*
+ * kgdb support for ARC
+ *
+ * Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __ARC_KGDB_H__
+#define __ARC_KGDB_H__
+
+#ifdef CONFIG_KGDB
+
+#include <asm/user.h>
+
+/* to ensure compatibility with Linux 2.6.35, we don't implement the get/set
+ * register API yet */
+#undef DBG_MAX_REG_NUM
+
+#define GDB_MAX_REGS            39
+
+#define BREAK_INSTR_SIZE        2
+#define CACHE_FLUSH_IS_SAFE     1
+#define NUMREGBYTES             (GDB_MAX_REGS * 4)
+#define BUFMAX                  2048
+
+static inline void arch_kgdb_breakpoint(void)
+{
+        __asm__ __volatile__ ("trap_s   0x4\n");
+}
+
+extern void kgdb_trap(struct pt_regs *regs, int param);
+
+enum arc700_linux_regnums {
+        _R0             = 0,
+        _R1, _R2, _R3, _R4, _R5, _R6, _R7, _R8, _R9, _R10, _R11, _R12, _R13,
+        _R14, _R15, _R16, _R17, _R18, _R19, _R20, _R21, _R22, _R23, _R24,
+        _R25, _R26,
+        _BTA            = 27,
+        _LP_START       = 28,
+        _LP_END         = 29,
+        _LP_COUNT       = 30,
+        _STATUS32       = 31,
+        _BLINK          = 32,
+        _FP             = 33,
+        __SP            = 34,
+        _EFA            = 35,
+        _RET            = 36,
+        _ORIG_R8        = 37,
+        _STOP_PC        = 38
+};
+
+#else
+static inline void kgdb_trap(struct pt_regs *regs, int param)
+{
+}
+#endif
+
+#endif  /* __ARC_KGDB_H__ */