1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-only */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Amit Bhor, Sameer Dhavale: Codito Technologies 2004
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun #ifndef __ASM_ARC_PTRACE_H
8*4882a593Smuzhiyun #define __ASM_ARC_PTRACE_H
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <uapi/asm/ptrace.h>
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #ifndef __ASSEMBLY__
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun /* THE pt_regs: Defines how regs are saved during entry into kernel */
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #ifdef CONFIG_ISA_ARCOMPACT
17*4882a593Smuzhiyun struct pt_regs {
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun /* Real registers */
20*4882a593Smuzhiyun unsigned long bta; /* bta_l1, bta_l2, erbta */
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun unsigned long lp_start, lp_end, lp_count;
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun unsigned long status32; /* status32_l1, status32_l2, erstatus */
25*4882a593Smuzhiyun unsigned long ret; /* ilink1, ilink2 or eret */
26*4882a593Smuzhiyun unsigned long blink;
27*4882a593Smuzhiyun unsigned long fp;
28*4882a593Smuzhiyun unsigned long r26; /* gp */
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun unsigned long r12, r11, r10, r9, r8, r7, r6, r5, r4, r3, r2, r1, r0;
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun unsigned long sp; /* User/Kernel depending on where we came from */
33*4882a593Smuzhiyun unsigned long orig_r0;
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun /*
36*4882a593Smuzhiyun * To distinguish bet excp, syscall, irq
37*4882a593Smuzhiyun * For traps and exceptions, Exception Cause Register.
38*4882a593Smuzhiyun * ECR: <00> <VV> <CC> <PP>
39*4882a593Smuzhiyun * Last word used by Linux for extra state mgmt (syscall-restart)
40*4882a593Smuzhiyun * For interrupts, use artificial ECR values to note current prio-level
41*4882a593Smuzhiyun */
42*4882a593Smuzhiyun union {
43*4882a593Smuzhiyun struct {
44*4882a593Smuzhiyun #ifdef CONFIG_CPU_BIG_ENDIAN
45*4882a593Smuzhiyun unsigned long state:8, ecr_vec:8,
46*4882a593Smuzhiyun ecr_cause:8, ecr_param:8;
47*4882a593Smuzhiyun #else
48*4882a593Smuzhiyun unsigned long ecr_param:8, ecr_cause:8,
49*4882a593Smuzhiyun ecr_vec:8, state:8;
50*4882a593Smuzhiyun #endif
51*4882a593Smuzhiyun };
52*4882a593Smuzhiyun unsigned long event;
53*4882a593Smuzhiyun };
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun unsigned long user_r25;
56*4882a593Smuzhiyun };
57*4882a593Smuzhiyun #else
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun struct pt_regs {
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun unsigned long orig_r0;
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun union {
64*4882a593Smuzhiyun struct {
65*4882a593Smuzhiyun #ifdef CONFIG_CPU_BIG_ENDIAN
66*4882a593Smuzhiyun unsigned long state:8, ecr_vec:8,
67*4882a593Smuzhiyun ecr_cause:8, ecr_param:8;
68*4882a593Smuzhiyun #else
69*4882a593Smuzhiyun unsigned long ecr_param:8, ecr_cause:8,
70*4882a593Smuzhiyun ecr_vec:8, state:8;
71*4882a593Smuzhiyun #endif
72*4882a593Smuzhiyun };
73*4882a593Smuzhiyun unsigned long event;
74*4882a593Smuzhiyun };
75*4882a593Smuzhiyun
76*4882a593Smuzhiyun unsigned long bta; /* bta_l1, bta_l2, erbta */
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun unsigned long user_r25;
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun unsigned long r26; /* gp */
81*4882a593Smuzhiyun unsigned long fp;
82*4882a593Smuzhiyun unsigned long sp; /* user/kernel sp depending on where we came from */
83*4882a593Smuzhiyun
84*4882a593Smuzhiyun unsigned long r12, r30;
85*4882a593Smuzhiyun
86*4882a593Smuzhiyun #ifdef CONFIG_ARC_HAS_ACCL_REGS
87*4882a593Smuzhiyun unsigned long r58, r59; /* ACCL/ACCH used by FPU / DSP MPY */
88*4882a593Smuzhiyun #endif
89*4882a593Smuzhiyun #ifdef CONFIG_ARC_DSP_SAVE_RESTORE_REGS
90*4882a593Smuzhiyun unsigned long DSP_CTRL;
91*4882a593Smuzhiyun #endif
92*4882a593Smuzhiyun
93*4882a593Smuzhiyun /*------- Below list auto saved by h/w -----------*/
94*4882a593Smuzhiyun unsigned long r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11;
95*4882a593Smuzhiyun
96*4882a593Smuzhiyun unsigned long blink;
97*4882a593Smuzhiyun unsigned long lp_end, lp_start, lp_count;
98*4882a593Smuzhiyun
99*4882a593Smuzhiyun unsigned long ei, ldi, jli;
100*4882a593Smuzhiyun
101*4882a593Smuzhiyun unsigned long ret;
102*4882a593Smuzhiyun unsigned long status32;
103*4882a593Smuzhiyun };
104*4882a593Smuzhiyun
105*4882a593Smuzhiyun #endif
106*4882a593Smuzhiyun
107*4882a593Smuzhiyun /* Callee saved registers - need to be saved only when you are scheduled out */
108*4882a593Smuzhiyun
109*4882a593Smuzhiyun struct callee_regs {
110*4882a593Smuzhiyun unsigned long r25, r24, r23, r22, r21, r20, r19, r18, r17, r16, r15, r14, r13;
111*4882a593Smuzhiyun };
112*4882a593Smuzhiyun
113*4882a593Smuzhiyun #define instruction_pointer(regs) ((regs)->ret)
114*4882a593Smuzhiyun #define profile_pc(regs) instruction_pointer(regs)
115*4882a593Smuzhiyun
116*4882a593Smuzhiyun /* return 1 if user mode or 0 if kernel mode */
117*4882a593Smuzhiyun #define user_mode(regs) (regs->status32 & STATUS_U_MASK)
118*4882a593Smuzhiyun
119*4882a593Smuzhiyun #define user_stack_pointer(regs)\
120*4882a593Smuzhiyun ({ unsigned int sp; \
121*4882a593Smuzhiyun if (user_mode(regs)) \
122*4882a593Smuzhiyun sp = (regs)->sp;\
123*4882a593Smuzhiyun else \
124*4882a593Smuzhiyun sp = -1; \
125*4882a593Smuzhiyun sp; \
126*4882a593Smuzhiyun })
127*4882a593Smuzhiyun
128*4882a593Smuzhiyun /* return 1 if PC in delay slot */
129*4882a593Smuzhiyun #define delay_mode(regs) ((regs->status32 & STATUS_DE_MASK) == STATUS_DE_MASK)
130*4882a593Smuzhiyun
131*4882a593Smuzhiyun #define in_syscall(regs) ((regs->ecr_vec == ECR_V_TRAP) && !regs->ecr_param)
132*4882a593Smuzhiyun #define in_brkpt_trap(regs) ((regs->ecr_vec == ECR_V_TRAP) && regs->ecr_param)
133*4882a593Smuzhiyun
134*4882a593Smuzhiyun #define STATE_SCALL_RESTARTED 0x01
135*4882a593Smuzhiyun
136*4882a593Smuzhiyun #define syscall_wont_restart(reg) (reg->state |= STATE_SCALL_RESTARTED)
137*4882a593Smuzhiyun #define syscall_restartable(reg) !(reg->state & STATE_SCALL_RESTARTED)
138*4882a593Smuzhiyun
139*4882a593Smuzhiyun #define current_pt_regs() \
140*4882a593Smuzhiyun ({ \
141*4882a593Smuzhiyun /* open-coded current_thread_info() */ \
142*4882a593Smuzhiyun register unsigned long sp asm ("sp"); \
143*4882a593Smuzhiyun unsigned long pg_start = (sp & ~(THREAD_SIZE - 1)); \
144*4882a593Smuzhiyun (struct pt_regs *)(pg_start + THREAD_SIZE) - 1; \
145*4882a593Smuzhiyun })
146*4882a593Smuzhiyun
regs_return_value(struct pt_regs * regs)147*4882a593Smuzhiyun static inline long regs_return_value(struct pt_regs *regs)
148*4882a593Smuzhiyun {
149*4882a593Smuzhiyun return (long)regs->r0;
150*4882a593Smuzhiyun }
151*4882a593Smuzhiyun
152*4882a593Smuzhiyun #endif /* !__ASSEMBLY__ */
153*4882a593Smuzhiyun
154*4882a593Smuzhiyun #endif /* __ASM_PTRACE_H */
155