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/*
* AArch64 KGDB support
*
* Based on arch/arm/include/kgdb.h
*
* Copyright (C) 2013 Cavium Inc.
* Author: Vijaya Kumar K <vijaya.kumar@caviumnetworks.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __ARM_KGDB_H
#define __ARM_KGDB_H
#include <linux/ptrace.h>
#include <asm/debug-monitors.h>
#ifndef __ASSEMBLY__
static inline void arch_kgdb_breakpoint(void)
{
asm ("brk %0" : : "I" (KGDB_COMPILED_DBG_BRK_IMM));
}
extern void kgdb_handle_bus_error(void);
extern int kgdb_fault_expected;
#endif /* !__ASSEMBLY__ */
/*
* gdb is expecting the following registers layout.
*
* General purpose regs:
* r0-r30: 64 bit
* sp,pc : 64 bit
* pstate : 64 bit
* Total: 34
* FPU regs:
* f0-f31: 128 bit
* Total: 32
* Extra regs
* fpsr & fpcr: 32 bit
* Total: 2
*
*/
#define _GP_REGS 34
#define _FP_REGS 32
#define _EXTRA_REGS 2
/*
* general purpose registers size in bytes.
* pstate is only 4 bytes. subtract 4 bytes
*/
#define GP_REG_BYTES (_GP_REGS * 8)
#define DBG_MAX_REG_NUM (_GP_REGS + _FP_REGS + _EXTRA_REGS)
/*
* Size of I/O buffer for gdb packet.
* considering to hold all register contents, size is set
*/
#define BUFMAX 2048
/*
* Number of bytes required for gdb_regs buffer.
* _GP_REGS: 8 bytes, _FP_REGS: 16 bytes and _EXTRA_REGS: 4 bytes each
* GDB fails to connect for size beyond this with error
* "'g' packet reply is too long"
*/
#define NUMREGBYTES ((_GP_REGS * 8) + (_FP_REGS * 16) + \
(_EXTRA_REGS * 4))
#endif /* __ASM_KGDB_H */