xref: /OK3568_Linux_fs/kernel/arch/hexagon/include/asm/kgdb.h (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-only */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun  * arch/hexagon/include/asm/kgdb.h - Hexagon KGDB Support
4*4882a593Smuzhiyun  *
5*4882a593Smuzhiyun  * Copyright (c) 2011, The Linux Foundation. All rights reserved.
6*4882a593Smuzhiyun  */
7*4882a593Smuzhiyun 
8*4882a593Smuzhiyun #ifndef __HEXAGON_KGDB_H__
9*4882a593Smuzhiyun #define __HEXAGON_KGDB_H__
10*4882a593Smuzhiyun 
11*4882a593Smuzhiyun #define BREAK_INSTR_SIZE 4
12*4882a593Smuzhiyun #define CACHE_FLUSH_IS_SAFE   1
13*4882a593Smuzhiyun #define BUFMAX       ((NUMREGBYTES * 2) + 512)
14*4882a593Smuzhiyun 
arch_kgdb_breakpoint(void)15*4882a593Smuzhiyun static inline void arch_kgdb_breakpoint(void)
16*4882a593Smuzhiyun {
17*4882a593Smuzhiyun 	asm("trap0(#0xDB)");
18*4882a593Smuzhiyun }
19*4882a593Smuzhiyun 
20*4882a593Smuzhiyun /* Registers:
21*4882a593Smuzhiyun  * 32 gpr + sa0/1 + lc0/1 + m0/1 + gp + ugp + pred + pc = 42 total.
22*4882a593Smuzhiyun  * vm regs = psp+elr+est+badva = 4
23*4882a593Smuzhiyun  * syscall+restart = 2 more
24*4882a593Smuzhiyun  * also add cs0/1 = 2
25*4882a593Smuzhiyun  * so 48 = 42 + 4 + 2 + 2
26*4882a593Smuzhiyun  */
27*4882a593Smuzhiyun #define DBG_USER_REGS 42
28*4882a593Smuzhiyun #define DBG_MAX_REG_NUM (DBG_USER_REGS + 8)
29*4882a593Smuzhiyun #define NUMREGBYTES  (DBG_MAX_REG_NUM*4)
30*4882a593Smuzhiyun 
31*4882a593Smuzhiyun #endif /* __HEXAGON_KGDB_H__ */
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