diff options
Diffstat (limited to 'include/asm-x86/debugreg_32.h')
-rw-r--r-- | include/asm-x86/debugreg_32.h | 64 |
1 files changed, 0 insertions, 64 deletions
diff --git a/include/asm-x86/debugreg_32.h b/include/asm-x86/debugreg_32.h deleted file mode 100644 index f0b2b06ae0f7..000000000000 --- a/include/asm-x86/debugreg_32.h +++ /dev/null | |||
@@ -1,64 +0,0 @@ | |||
1 | #ifndef _I386_DEBUGREG_H | ||
2 | #define _I386_DEBUGREG_H | ||
3 | |||
4 | |||
5 | /* Indicate the register numbers for a number of the specific | ||
6 | debug registers. Registers 0-3 contain the addresses we wish to trap on */ | ||
7 | #define DR_FIRSTADDR 0 /* u_debugreg[DR_FIRSTADDR] */ | ||
8 | #define DR_LASTADDR 3 /* u_debugreg[DR_LASTADDR] */ | ||
9 | |||
10 | #define DR_STATUS 6 /* u_debugreg[DR_STATUS] */ | ||
11 | #define DR_CONTROL 7 /* u_debugreg[DR_CONTROL] */ | ||
12 | |||
13 | /* Define a few things for the status register. We can use this to determine | ||
14 | which debugging register was responsible for the trap. The other bits | ||
15 | are either reserved or not of interest to us. */ | ||
16 | |||
17 | #define DR_TRAP0 (0x1) /* db0 */ | ||
18 | #define DR_TRAP1 (0x2) /* db1 */ | ||
19 | #define DR_TRAP2 (0x4) /* db2 */ | ||
20 | #define DR_TRAP3 (0x8) /* db3 */ | ||
21 | |||
22 | #define DR_STEP (0x4000) /* single-step */ | ||
23 | #define DR_SWITCH (0x8000) /* task switch */ | ||
24 | |||
25 | /* Now define a bunch of things for manipulating the control register. | ||
26 | The top two bytes of the control register consist of 4 fields of 4 | ||
27 | bits - each field corresponds to one of the four debug registers, | ||
28 | and indicates what types of access we trap on, and how large the data | ||
29 | field is that we are looking at */ | ||
30 | |||
31 | #define DR_CONTROL_SHIFT 16 /* Skip this many bits in ctl register */ | ||
32 | #define DR_CONTROL_SIZE 4 /* 4 control bits per register */ | ||
33 | |||
34 | #define DR_RW_EXECUTE (0x0) /* Settings for the access types to trap on */ | ||
35 | #define DR_RW_WRITE (0x1) | ||
36 | #define DR_RW_READ (0x3) | ||
37 | |||
38 | #define DR_LEN_1 (0x0) /* Settings for data length to trap on */ | ||
39 | #define DR_LEN_2 (0x4) | ||
40 | #define DR_LEN_4 (0xC) | ||
41 | |||
42 | /* The low byte to the control register determine which registers are | ||
43 | enabled. There are 4 fields of two bits. One bit is "local", meaning | ||
44 | that the processor will reset the bit after a task switch and the other | ||
45 | is global meaning that we have to explicitly reset the bit. With linux, | ||
46 | you can use either one, since we explicitly zero the register when we enter | ||
47 | kernel mode. */ | ||
48 | |||
49 | #define DR_LOCAL_ENABLE_SHIFT 0 /* Extra shift to the local enable bit */ | ||
50 | #define DR_GLOBAL_ENABLE_SHIFT 1 /* Extra shift to the global enable bit */ | ||
51 | #define DR_ENABLE_SIZE 2 /* 2 enable bits per register */ | ||
52 | |||
53 | #define DR_LOCAL_ENABLE_MASK (0x55) /* Set local bits for all 4 regs */ | ||
54 | #define DR_GLOBAL_ENABLE_MASK (0xAA) /* Set global bits for all 4 regs */ | ||
55 | |||
56 | /* The second byte to the control register has a few special things. | ||
57 | We can slow the instruction pipeline for instructions coming via the | ||
58 | gdt or the ldt if we want to. I am not sure why this is an advantage */ | ||
59 | |||
60 | #define DR_CONTROL_RESERVED (0xFC00) /* Reserved by Intel */ | ||
61 | #define DR_LOCAL_SLOWDOWN (0x100) /* Local slow the pipeline */ | ||
62 | #define DR_GLOBAL_SLOWDOWN (0x200) /* Global slow the pipeline */ | ||
63 | |||
64 | #endif | ||