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/*
* 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)
#define BREAK_INSTR 0x7d821008 /* twge r2, r2 */
static inline void arch_kgdb_breakpoint(void)
{
asm(stringify_in_c(.long BREAK_INSTR));
}
#define CACHE_FLUSH_IS_SAFE 1
#define DBG_MAX_REG_NUM 70
/* 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__ */
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