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authorPaul Mundt <lethal@linux-sh.org>2008-12-11 18:46:46 +0900
committerPaul Mundt <lethal@linux-sh.org>2008-12-22 18:44:04 +0900
commitab6e570ba33dbee18c2520d386e0f367a9b573c3 (patch)
tree7594192d10726e72bf7744bb83bdc0c9a30891d1 /arch/sh/include
parentd7b01f78a3ae6a3cc21a16a1a3d377adc2227537 (diff)
sh: Generic kgdb stub support.
This migrates from the old bitrotted kgdb stub implementation and moves to the generic stub. In the process support for SH-2/SH-2A is also added, which the old stub never provided. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/include')
-rw-r--r--arch/sh/include/asm/kgdb.h66
-rw-r--r--arch/sh/include/asm/system.h2
2 files changed, 21 insertions, 47 deletions
diff --git a/arch/sh/include/asm/kgdb.h b/arch/sh/include/asm/kgdb.h
index 24e42078f36..72704ed725e 100644
--- a/arch/sh/include/asm/kgdb.h
+++ b/arch/sh/include/asm/kgdb.h
@@ -1,21 +1,7 @@
-/*
- * 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
+#ifndef __ASM_SH_KGDB_H
+#define __ASM_SH_KGDB_H
+#include <asm/cacheflush.h>
#include <asm/ptrace.h>
/* Same as pt_regs but has vbr in place of syscall_nr */
@@ -30,40 +16,26 @@ struct kgdb_regs {
unsigned long vbr;
};
-/* State info */
-extern char kgdb_in_gdb_mode;
-extern int kgdb_nofault; /* Ignore bus errors (in gdb mem access) */
-extern char in_nmi; /* Debounce flag to prevent NMI reentry*/
+enum regnames {
+ GDB_R0, GDB_R1, GDB_R2, GDB_R3, GDB_R4, GDB_R5, GDB_R6, GDB_R7,
+ GDB_R8, GDB_R9, GDB_R10, GDB_R11, GDB_R12, GDB_R13, GDB_R14, GDB_R15,
-/* SCI */
-extern int kgdb_portnum;
-extern int kgdb_baud;
-extern char kgdb_parity;
-extern char kgdb_bits;
+ GDB_PC, GDB_PR, GDB_SR, GDB_GBR, GDB_MACH, GDB_MACL, GDB_VBR,
+};
-/* Init and interface stuff */
-extern int kgdb_init(void);
-extern int (*kgdb_getchar)(void);
-extern void (*kgdb_putchar)(int);
+#define NUMREGBYTES ((GDB_VBR + 1) * 4)
-/* 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;
+static inline void arch_kgdb_breakpoint(void)
+{
+ __asm__ __volatile__ ("trapa #0x3c\n");
+}
-/* Console */
-struct console;
-void kgdb_console_write(struct console *co, const char *s, unsigned count);
-extern int kgdb_console_setup(struct console *, char *);
+/* State info */
+extern char in_nmi; /* Debounce flag to prevent NMI reentry*/
-/* 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);
+#define BUFMAX 2048
-/* Forced breakpoint */
-#define breakpoint() __asm__ __volatile__("trapa #0x3c")
+#define CACHE_FLUSH_IS_SAFE 1
+#define BREAK_INSTR_SIZE 2
-#endif
+#endif /* __ASM_SH_KGDB_H */
diff --git a/arch/sh/include/asm/system.h b/arch/sh/include/asm/system.h
index 6160fe44516..c9ec6af8e74 100644
--- a/arch/sh/include/asm/system.h
+++ b/arch/sh/include/asm/system.h
@@ -175,6 +175,8 @@ asmlinkage void name##_trap_handler(unsigned int vec, struct pt_regs *regs)
BUILD_TRAP_HANDLER(address_error);
BUILD_TRAP_HANDLER(debug);
BUILD_TRAP_HANDLER(bug);
+BUILD_TRAP_HANDLER(breakpoint);
+BUILD_TRAP_HANDLER(singlestep);
BUILD_TRAP_HANDLER(fpu_error);
BUILD_TRAP_HANDLER(fpu_state_restore);