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-rw-r--r--include/asm-sh/kgdb.h131
1 files changed, 131 insertions, 0 deletions
diff --git a/include/asm-sh/kgdb.h b/include/asm-sh/kgdb.h
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+++ 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