diff options
| author | Michal Simek <monstr@monstr.eu> | 2010-08-03 11:45:08 +0200 |
|---|---|---|
| committer | Michal Simek <monstr@monstr.eu> | 2010-08-04 10:45:17 +0200 |
| commit | 2d5973cb5ac5d04662f86e19a06a4c52fa4c4ae3 (patch) | |
| tree | 21ddc58eed5ccad856fc44dfb0ee794da41d5b16 /arch/microblaze/include | |
| parent | 751f1605e03533a6279ccf456e938e9595c7d888 (diff) | |
microblaze: Add KGDB support
Kgdb uses brki r16, 0x18 instruction to call
low level _debug_exception function which save
current state to pt_regs and call microblaze_kgdb_break
function. _debug_exception should be called only from
the kernel space. User space calling is not supported
because user application debugging uses different handling.
pt_regs_to_gdb_regs loads additional special registers
which can't be changed
* Enable KGDB in Kconfig
* Remove ancient not-tested KGDB support
* Remove ancient _debug_exception code from entry.S
Only MMU KGDB support is supported.
Signed-off-by: Michal Simek <monstr@monstr.eu>
CC: Jason Wessel <jason.wessel@windriver.com>
CC: John Williams <john.williams@petalogix.com>
CC: Edgar E. Iglesias <edgar.iglesias@petalogix.com>
CC: linux-kernel@vger.kernel.org
Acked-by: Jason Wessel <jason.wessel@windriver.com>
Diffstat (limited to 'arch/microblaze/include')
| -rw-r--r-- | arch/microblaze/include/asm/exceptions.h | 16 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/kgdb.h | 28 |
2 files changed, 28 insertions, 16 deletions
diff --git a/arch/microblaze/include/asm/exceptions.h b/arch/microblaze/include/asm/exceptions.h index fa0e36657fdd..6479097b802b 100644 --- a/arch/microblaze/include/asm/exceptions.h +++ b/arch/microblaze/include/asm/exceptions.h @@ -69,22 +69,6 @@ asmlinkage void full_exception(struct pt_regs *regs, unsigned int type, void die(const char *str, struct pt_regs *fp, long err); void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr); -#if defined(CONFIG_KGDB) -void (*debugger)(struct pt_regs *regs); -int (*debugger_bpt)(struct pt_regs *regs); -int (*debugger_sstep)(struct pt_regs *regs); -int (*debugger_iabr_match)(struct pt_regs *regs); -int (*debugger_dabr_match)(struct pt_regs *regs); -void (*debugger_fault_handler)(struct pt_regs *regs); -#else -#define debugger(regs) do { } while (0) -#define debugger_bpt(regs) 0 -#define debugger_sstep(regs) 0 -#define debugger_iabr_match(regs) 0 -#define debugger_dabr_match(regs) 0 -#define debugger_fault_handler ((void (*)(struct pt_regs *))0) -#endif - #endif /*__ASSEMBLY__ */ #endif /* __KERNEL__ */ #endif /* _ASM_MICROBLAZE_EXCEPTIONS_H */ diff --git a/arch/microblaze/include/asm/kgdb.h b/arch/microblaze/include/asm/kgdb.h new file mode 100644 index 000000000000..78b17d40b235 --- /dev/null +++ b/arch/microblaze/include/asm/kgdb.h @@ -0,0 +1,28 @@ +#ifdef __KERNEL__ +#ifndef __MICROBLAZE_KGDB_H__ +#define __MICROBLAZE_KGDB_H__ + +#ifndef __ASSEMBLY__ + +#define CACHE_FLUSH_IS_SAFE 1 +#define BUFMAX 2048 + +/* + * 32 32-bit general purpose registers (r0-r31) + * 6 32-bit special registers (pc, msr, ear, esr, fsr, btr) + * 12 32-bit PVR + * 7 32-bit MMU Regs (redr, rpid, rzpr, rtlbx, rtlbsx, rtlblo, rtlbhi) + * ------ + * 57 registers + */ +#define NUMREGBYTES (57 * 4) + +#define BREAK_INSTR_SIZE 4 +static inline void arch_kgdb_breakpoint(void) +{ + __asm__ __volatile__("brki r16, 0x18;"); +} + +#endif /* __ASSEMBLY__ */ +#endif /* __MICROBLAZE_KGDB_H__ */ +#endif /* __KERNEL__ */ |