| /* | |
| * 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> | |
| #include <asm/cacheflush.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; | |
| /* Init and interface stuff */ | |
| extern int kgdb_init(void); | |
| extern int (*kgdb_getchar)(void); | |
| extern void (*kgdb_putchar)(int); | |
| /* 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; | |
| /* Console */ | |
| void kgdb_console_write(struct console *co, const char *s, unsigned count); | |
| extern int kgdb_console_setup(struct console *, char *); | |
| /* 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); | |
| /* Forced breakpoint */ | |
| #define breakpoint() \ | |
| do { \ | |
| if (kgdb_enabled) \ | |
| __asm__ __volatile__("trapa #0x3c"); \ | |
| } while (0) | |
| /* KGDB should be able to flush all kernel text space */ | |
| #if defined(CONFIG_CPU_SH4) | |
| #define kgdb_flush_icache_range(start, end) \ | |
| { \ | |
| __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 | |
| /* Taken from sh-stub.c of GDB 4.18 */ | |
| static const char hexchars[] = "0123456789abcdef"; | |
| /* Get high hex bits */ | |
| static inline char highhex(const int x) | |
| { | |
| return hexchars[(x >> 4) & 0xf]; | |
| } | |
| /* Get low hex bits */ | |
| static inline char lowhex(const int x) | |
| { | |
| return hexchars[x & 0xf]; | |
| } | |
| #endif |