17ce452f7e
This patch removes the old kgdb reminants from ARCH=powerpc and implements the new style arch specific stub for the common kgdb core interface. It is possible to have xmon and kgdb in the same kernel, but you cannot use both at the same time because there is only one set of debug hooks. The arch specific kgdb implementation saves the previous state of the debug hooks and restores them if you unconfigure the kgdb I/O driver. Kgdb should have no impact on a kernel that has no kgdb I/O driver configured. Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
66 lines
2.1 KiB
C
66 lines
2.1 KiB
C
/*
|
|
* include/asm-powerpc/kgdb.h
|
|
*
|
|
* The PowerPC (32/64) specific defines / externs for KGDB. Based on
|
|
* the previous 32bit and 64bit specific files, which had the following
|
|
* copyrights:
|
|
*
|
|
* PPC64 Mods (C) 2005 Frank Rowand (frowand@mvista.com)
|
|
* PPC Mods (C) 2004 Tom Rini (trini@mvista.com)
|
|
* PPC Mods (C) 2003 John Whitney (john.whitney@timesys.com)
|
|
* PPC Mods (C) 1998 Michael Tesch (tesch@cs.wisc.edu)
|
|
*
|
|
*
|
|
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
|
|
* Author: Tom Rini <trini@kernel.crashing.org>
|
|
*
|
|
* 2006 (c) MontaVista Software, Inc. This file is licensed under
|
|
* the terms of the GNU General Public License version 2. This program
|
|
* is licensed "as is" without any warranty of any kind, whether express
|
|
* or implied.
|
|
*/
|
|
#ifdef __KERNEL__
|
|
#ifndef __POWERPC_KGDB_H__
|
|
#define __POWERPC_KGDB_H__
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#define BREAK_INSTR_SIZE 4
|
|
#define BUFMAX ((NUMREGBYTES * 2) + 512)
|
|
#define OUTBUFMAX ((NUMREGBYTES * 2) + 512)
|
|
static inline void arch_kgdb_breakpoint(void)
|
|
{
|
|
asm(".long 0x7d821008"); /* twge r2, r2 */
|
|
}
|
|
#define CACHE_FLUSH_IS_SAFE 1
|
|
|
|
/* The number bytes of registers we have to save depends on a few
|
|
* things. For 64bit we default to not including vector registers and
|
|
* vector state registers. */
|
|
#ifdef CONFIG_PPC64
|
|
/*
|
|
* 64 bit (8 byte) registers:
|
|
* 32 gpr, 32 fpr, nip, msr, link, ctr
|
|
* 32 bit (4 byte) registers:
|
|
* ccr, xer, fpscr
|
|
*/
|
|
#define NUMREGBYTES ((68 * 8) + (3 * 4))
|
|
#define NUMCRITREGBYTES 184
|
|
#else /* CONFIG_PPC32 */
|
|
/* On non-E500 family PPC32 we determine the size by picking the last
|
|
* register we need, but on E500 we skip sections so we list what we
|
|
* need to store, and add it up. */
|
|
#ifndef CONFIG_E500
|
|
#define MAXREG (PT_FPSCR+1)
|
|
#else
|
|
/* 32 GPRs (8 bytes), nip, msr, ccr, link, ctr, xer, acc (8 bytes), spefscr*/
|
|
#define MAXREG ((32*2)+6+2+1)
|
|
#endif
|
|
#define NUMREGBYTES (MAXREG * sizeof(int))
|
|
/* CR/LR, R1, R2, R13-R31 inclusive. */
|
|
#define NUMCRITREGBYTES (23 * sizeof(int))
|
|
#endif /* 32/64 */
|
|
#endif /* !(__ASSEMBLY__) */
|
|
#endif /* !__POWERPC_KGDB_H__ */
|
|
#endif /* __KERNEL__ */
|