diff options
Diffstat (limited to 'include/asm-sh/kgdb.h')
| -rw-r--r-- | include/asm-sh/kgdb.h | 131 |
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 00000000000..1653ffb75fb --- /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 |