1 files changed, 131 insertions, 0 deletions

diff --git a/include/asm-sh/kgdb.h b/include/asm-sh/kgdb.h
new file mode 100644
index 000000000000..1653ffb75fbe
--- /dev/null
+++ b/include/asm-sh/kgdb.h
@@ -0,0 +1,131 @@
+/*
+ * May be copied or modified under the terms of the GNU General Public
+ * License.  See linux/COPYING for more information.
+ *
+ * Based on original code by Glenn Engel, Jim Kingdon,
+ * David Grothe <dave@gcom.com>, Tigran Aivazian, <tigran@sco.com> and
+ * Amit S. Kale <akale@veritas.com>
+ * 
+ * Super-H port based on sh-stub.c (Ben Lee and Steve Chamberlain) by
+ * Henry Bell <henry.bell@st.com>
+ * 
+ * Header file for low-level support for remote debug using GDB. 
+ *
+ */
+
+#ifndef __KGDB_H
+#define __KGDB_H
+
+#include <asm/ptrace.h>
+
+struct console;
+
+/* Same as pt_regs but has vbr in place of syscall_nr */
+struct kgdb_regs {
+        unsigned long regs[16];
+        unsigned long pc;
+        unsigned long pr;
+        unsigned long sr;
+        unsigned long gbr;
+        unsigned long mach;
+        unsigned long macl;
+        unsigned long vbr;
+};
+
+/* State info */
+extern char kgdb_in_gdb_mode;
+extern int kgdb_done_init;
+extern int kgdb_enabled;
+extern int kgdb_nofault;        /* Ignore bus errors (in gdb mem access) */
+extern int kgdb_halt;           /* Execute initial breakpoint at startup */
+extern char in_nmi;             /* Debounce flag to prevent NMI reentry*/
+
+/* SCI */
+extern int kgdb_portnum;
+extern int kgdb_baud;
+extern char kgdb_parity;
+extern char kgdb_bits;
+extern int kgdb_console_setup(struct console *, char *);
+
+/* Init and interface stuff */
+extern int kgdb_init(void);
+extern int (*kgdb_serial_setup)(void);
+extern int (*kgdb_getchar)(void);
+extern void (*kgdb_putchar)(int);
+
+struct kgdb_sermap {
+        char *name;
+        int namelen;
+        int (*setup_fn)(struct console *, char *);
+        struct kgdb_sermap *next;
+};
+extern void kgdb_register_sermap(struct kgdb_sermap *map);
+extern struct kgdb_sermap *kgdb_porttype;
+
+/* Trap functions */
+typedef void (kgdb_debug_hook_t)(struct pt_regs *regs); 
+typedef void (kgdb_bus_error_hook_t)(void);
+extern kgdb_debug_hook_t  *kgdb_debug_hook;
+extern kgdb_bus_error_hook_t *kgdb_bus_err_hook;
+
+extern void breakpoint(void);
+
+/* Console */
+struct console;
+void kgdb_console_write(struct console *co, const char *s, unsigned count);
+void kgdb_console_init(void);
+
+/* Prototypes for jmp fns */
+#define _JBLEN 9
+typedef        int jmp_buf[_JBLEN];
+extern void    longjmp(jmp_buf __jmpb, int __retval);
+extern int     setjmp(jmp_buf __jmpb);
+
+/* Variadic macro to print our own message to the console */
+#define KGDB_PRINTK(...) printk("KGDB: " __VA_ARGS__)
+
+/* Forced breakpoint */
+#define BREAKPOINT() do {                                     \
+  if (kgdb_enabled) {                                         \
+    asm volatile("trapa   #0xff");                            \
+  }                                                           \
+} while (0)
+
+/* KGDB should be able to flush all kernel text space */
+#if defined(CONFIG_CPU_SH4)
+#define kgdb_flush_icache_range(start, end) \
+{                                                                       \
+        extern void __flush_purge_region(void *, int);                  \
+        __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
+
+/* Kernel assert macros */
+#ifdef CONFIG_KGDB_KERNEL_ASSERTS
+
+/* Predefined conditions */
+#define KA_VALID_ERRNO(errno) ((errno) > 0 && (errno) <= EMEDIUMTYPE)
+#define KA_VALID_PTR_ERR(ptr) KA_VALID_ERRNO(-PTR_ERR(ptr))
+#define KA_VALID_KPTR(ptr)  (!(ptr) || \
+              ((void *)(ptr) >= (void *)PAGE_OFFSET &&  \
+               (void *)(ptr) < ERR_PTR(-EMEDIUMTYPE)))
+#define KA_VALID_PTRORERR(errptr) \
+               (KA_VALID_KPTR(errptr) || KA_VALID_PTR_ERR(errptr))
+#define KA_HELD_GKL()  (current->lock_depth >= 0)
+
+/* The actual assert */
+#define KGDB_ASSERT(condition, message) do {                   \
+       if (!(condition) && (kgdb_enabled)) {                   \
+               KGDB_PRINTK("Assertion failed at %s:%d: %s\n",  \
+                                  __FILE__, __LINE__, message);\
+               BREAKPOINT();                                   \
+       }                                                       \
+} while (0)
+#else
+#define KGDB_ASSERT(condition, message)
+#endif
+
+#endif