xv6-mips/regs.h at master · nullpo-head/xv6-mips · GitHub

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
// This file contains definitions for the
// MIPS register related constants.

// Coprocessor 0 register names
#define COP0_ENTRYLO0   2
#define COP0_ENTRYLO1   3
#define COP0_BADVADDR   8
#define COP0_ENTRYHI   10
#define COP0_STATUS    12
#define COP0_CAUSE     13
#define COP0_EPC       14
#define COP0_ERROREPC  30


// Status register flags
#define STATUS_IE   0x00000001
#define STATUS_EXL  0x00000002
#define STATUS_ERL  0x00000004
#define STATUS_KSU  0x00000018
#define STATUS_IM   0x0000ff00
#define STATUS_BEV  0x00400000
#define STATUS_CU0  0x10000000

#define STATUS_KSU_USER  0x00000010

// Cause register flags
#define CAUSE_EXC   0x0000007c