MN10300: Create generic kernel debugger hooks

Create generic kernel debugger hooks in the MN10300 arch and make gdbstub use
them.  This is a preparation for KGDB support.

Signed-off-by: David Howells <dhowells@redhat.com>

4 files changed, 18 insertions, 4 deletions

diff --git a/arch/mn10300/include/asm/debugger.h b/arch/mn10300/include/asm/debugger.h
index 4517f839a999..e1d3b083696c 100644
--- a/arch/mn10300/include/asm/debugger.h
+++ b/arch/mn10300/include/asm/debugger.h
@@ -14,6 +14,9 @@
 
 #if defined(CONFIG_KERNEL_DEBUGGER)
 
+extern int debugger_intercept(enum exception_code, int, int, struct pt_regs *);
+extern int at_debugger_breakpoint(struct pt_regs *);
+
 #ifndef CONFIG_MN10300_DEBUGGER_CACHE_NO_FLUSH
 extern void debugger_local_cache_flushinv(void);
 extern void debugger_local_cache_flushinv_one(u8 *);
@@ -24,5 +27,17 @@ static inline void debugger_local_cache_flushinv_one(u8 *addr) {}
 
 #else /* CONFIG_KERNEL_DEBUGGER */
 
+static inline int debugger_intercept(enum exception_code excep,
+                                     int signo, int si_code,
+                                     struct pt_regs *regs)
+{
+        return 0;
+}
+
+static inline int at_debugger_breakpoint(struct pt_regs *regs)
+{
+        return 0;
+}
+
 #endif /* CONFIG_KERNEL_DEBUGGER */
 #endif /* _ASM_DEBUGGER_H */
diff --git a/arch/mn10300/include/asm/fpu.h b/arch/mn10300/include/asm/fpu.h
index b7625de8eade..738ff72659d5 100644
--- a/arch/mn10300/include/asm/fpu.h
+++ b/arch/mn10300/include/asm/fpu.h
@@ -55,7 +55,6 @@ static inline void clear_using_fpu(struct task_struct *tsk)
 
 extern asmlinkage void fpu_kill_state(struct task_struct *);
 extern asmlinkage void fpu_exception(struct pt_regs *, enum exception_code);
-extern asmlinkage void fpu_invalid_op(struct pt_regs *, enum exception_code);
 extern asmlinkage void fpu_init_state(void);
 extern asmlinkage void fpu_save(struct fpu_state_struct *);
 extern int fpu_setup_sigcontext(struct fpucontext *buf);
@@ -113,7 +112,6 @@ static inline void flush_fpu(void)
 
 extern asmlinkage
 void unexpected_fpu_exception(struct pt_regs *, enum exception_code);
-#define fpu_invalid_op unexpected_fpu_exception
 #define fpu_exception unexpected_fpu_exception
 
 struct task_struct;
diff --git a/arch/mn10300/include/asm/irqflags.h b/arch/mn10300/include/asm/irqflags.h
index 7a7ae12c7119..678f68d5f37b 100644
--- a/arch/mn10300/include/asm/irqflags.h
+++ b/arch/mn10300/include/asm/irqflags.h
@@ -20,7 +20,7 @@
 /*
  * interrupt control
  * - "disabled": run in IM1/2
- *   - level 0 - GDB stub
+ *   - level 0 - kernel debugger
  *   - level 1 - virtual serial DMA (if present)
  *   - level 5 - normal interrupt priority
  *   - level 6 - timer interrupt
diff --git a/arch/mn10300/include/asm/smp.h b/arch/mn10300/include/asm/smp.h
index a3930e43a958..e3d13a899855 100644
--- a/arch/mn10300/include/asm/smp.h
+++ b/arch/mn10300/include/asm/smp.h
@@ -34,7 +34,7 @@
 #define LOCAL_TIMER_IPI         193
 #define FLUSH_CACHE_IPI         194
 #define CALL_FUNCTION_NMI_IPI   195
-#define GDB_NMI_IPI             196
+#define DEBUGGER_NMI_IPI        196
 
 #define SMP_BOOT_IRQ            195
 
@@ -43,6 +43,7 @@
 #define LOCAL_TIMER_GxICR_LV    GxICR_LEVEL_4
 #define FLUSH_CACHE_GxICR_LV    GxICR_LEVEL_0
 #define SMP_BOOT_GxICR_LV       GxICR_LEVEL_0
+#define DEBUGGER_GxICR_LV       CONFIG_DEBUGGER_IRQ_LEVEL
 
 #define TIME_OUT_COUNT_BOOT_IPI 100
 #define DELAY_TIME_BOOT_IPI     75000