trap.h
3.04 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
/*
* Copyright (c) 2021, Shenzhen Academy of Aerospace Technology
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-11-16 Dystopia the first version
*/
#ifndef __TRAP_H__
#define __TRAP_H__
#include "c66xx.h"
/*
* exception operation macro
*/
#define disable_exception()
#define get_except_type() EFR
#define ack_exception(type) ECR = 1ul << (type)
#define get_iexcept() IERR
#define set_iexcept(mask) IERR = (mask)
/*
* exception types
*/
#define EXCEPT_TYPE_NXF 31 /* NMI */
#define EXCEPT_TYPE_EXC 30 /* external exception */
#define EXCEPT_TYPE_IXF 1 /* internal exception */
#define EXCEPT_TYPE_SXF 0 /* software exception */
#define EXCEPT_CAUSE_LBX (1 << 7) /* loop buffer exception */
#define EXCEPT_CAUSE_PRX (1 << 6) /* privilege exception */
#define EXCEPT_CAUSE_RAX (1 << 5) /* resource access exception */
#define EXCEPT_CAUSE_RCX (1 << 4) /* resource conflict exception */
#define EXCEPT_CAUSE_OPX (1 << 3) /* opcode exception */
#define EXCEPT_CAUSE_EPX (1 << 2) /* execute packet exception */
#define EXCEPT_CAUSE_FPX (1 << 1) /* fetch packet exception */
#define EXCEPT_CAUSE_IFX (1 << 0) /* instruction fetch exception */
enum SYSTEM_TRAP_CODE
{
ABORT_BUS_ADDRERR = 0, // bus address error
ABORT_BUS_ACCERR, // bus access permission error
ABORT_OPCODE_ILL, // illegal opcode
ABORT_PRVREG_ILL, // privilege register
ABORT_PRVOPC_ILL, // privileged opcode
ABORT_ILLTRP_ILL, // illegal trap
ABORT_BRKPT_ILL, // handling breakpoints
};
/*
* abort types
*/
#define ABORT_TYPE_BUS 0 // bus access abnormal
#define ABORT_TYPE_MAP 1 // page table mapping error
#define ABORT_TYPE_UNDDEF 0xff // undefined exception
#define ABORT_TYPE_FATAL 0xffffffff // fatal error
struct rt_exception_info {
char *kernel_str;
int type;
int code;
};
#define BKPT_OPCODE 0x56454314 /* illegal opcode */
#define INTC_MEXPMASK __SYSREGA(0x018000e0, unsigned int)
extern void rt_trap_init(void);
extern void rt_hw_enable_exception(void);
extern int __fls(int val);
extern int __ffs(int val);
/*
* ffz - find first zero in word.
* @word: The word to search
*
* Undefined if no zero exists, so code should check against ~0UL first.
*/
#define ffz(x) __ffs(~(x))
/**
* fls - find last (most-significant) bit set
* @x: the word to search
*
* This is defined the same way as ffs.
* Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
*/
static inline int fls(int x)
{
if (!x)
{
return 0;
}
return 32 - __fls(x);
}
/**
* ffs - find first bit set
* @x: the word to search
*
* This is defined the same way as
* the libc and compiler builtin ffs routines, therefore
* differs in spirit from the above ffz (man ffs).
* Note ffs(0) = 0, ffs(1) = 1, ffs(0x80000000) = 32.
*/
static inline int ffs(int x)
{
if (!x)
{
return 0;
}
return __ffs(x) + 1;
}
#endif /* __TRAP_H__ */