/* * 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