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mcfwdebug.h
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1 /****************************************************************************/
2 
3 /*
4  * mcfdebug.h -- ColdFire Debug Module support.
5  *
6  * (C) Copyright 2001, Lineo Inc. (www.lineo.com)
7  */
8 
9 /****************************************************************************/
10 #ifndef mcfdebug_h
11 #define mcfdebug_h
12 /****************************************************************************/
13 
14 /* Define the debug module registers */
15 #define MCFDEBUG_CSR 0x0 /* Configuration status */
16 #define MCFDEBUG_BAAR 0x5 /* BDM address attribute */
17 #define MCFDEBUG_AATR 0x6 /* Address attribute trigger */
18 #define MCFDEBUG_TDR 0x7 /* Trigger definition */
19 #define MCFDEBUG_PBR 0x8 /* PC breakpoint */
20 #define MCFDEBUG_PBMR 0x9 /* PC breakpoint mask */
21 #define MCFDEBUG_ABHR 0xc /* High address breakpoint */
22 #define MCFDEBUG_ABLR 0xd /* Low address breakpoint */
23 #define MCFDEBUG_DBR 0xe /* Data breakpoint */
24 #define MCFDEBUG_DBMR 0xf /* Data breakpoint mask */
25 
26 /* Define some handy constants for the trigger definition register */
27 #define MCFDEBUG_TDR_TRC_DISP 0x00000000 /* display on DDATA only */
28 #define MCFDEBUG_TDR_TRC_HALT 0x40000000 /* Processor halt on BP */
29 #define MCFDEBUG_TDR_TRC_INTR 0x80000000 /* Debug intr on BP */
30 #define MCFDEBUG_TDR_LXT1 0x00004000 /* TDR level 1 */
31 #define MCFDEBUG_TDR_LXT2 0x00008000 /* TDR level 2 */
32 #define MCFDEBUG_TDR_EBL1 0x00002000 /* Enable breakpoint level 1 */
33 #define MCFDEBUG_TDR_EBL2 0x20000000 /* Enable breakpoint level 2 */
34 #define MCFDEBUG_TDR_EDLW1 0x00001000 /* Enable data BP longword */
35 #define MCFDEBUG_TDR_EDLW2 0x10000000
36 #define MCFDEBUG_TDR_EDWL1 0x00000800 /* Enable data BP lower word */
37 #define MCFDEBUG_TDR_EDWL2 0x08000000
38 #define MCFDEBUG_TDR_EDWU1 0x00000400 /* Enable data BP upper word */
39 #define MCFDEBUG_TDR_EDWU2 0x04000000
40 #define MCFDEBUG_TDR_EDLL1 0x00000200 /* Enable data BP low low byte */
41 #define MCFDEBUG_TDR_EDLL2 0x02000000
42 #define MCFDEBUG_TDR_EDLM1 0x00000100 /* Enable data BP low mid byte */
43 #define MCFDEBUG_TDR_EDLM2 0x01000000
44 #define MCFDEBUG_TDR_EDUM1 0x00000080 /* Enable data BP up mid byte */
45 #define MCFDEBUG_TDR_EDUM2 0x00800000
46 #define MCFDEBUG_TDR_EDUU1 0x00000040 /* Enable data BP up up byte */
47 #define MCFDEBUG_TDR_EDUU2 0x00400000
48 #define MCFDEBUG_TDR_DI1 0x00000020 /* Data BP invert */
49 #define MCFDEBUG_TDR_DI2 0x00200000
50 #define MCFDEBUG_TDR_EAI1 0x00000010 /* Enable address BP inverted */
51 #define MCFDEBUG_TDR_EAI2 0x00100000
52 #define MCFDEBUG_TDR_EAR1 0x00000008 /* Enable address BP range */
53 #define MCFDEBUG_TDR_EAR2 0x00080000
54 #define MCFDEBUG_TDR_EAL1 0x00000004 /* Enable address BP low */
55 #define MCFDEBUG_TDR_EAL2 0x00040000
56 #define MCFDEBUG_TDR_EPC1 0x00000002 /* Enable PC BP */
57 #define MCFDEBUG_TDR_EPC2 0x00020000
58 #define MCFDEBUG_TDR_PCI1 0x00000001 /* PC BP invert */
59 #define MCFDEBUG_TDR_PCI2 0x00010000
60 
61 /* Constants for the address attribute trigger register */
62 #define MCFDEBUG_AAR_RESET 0x00000005
63 /* Fields not yet implemented */
64 
65 /* And some definitions for the writable sections of the CSR */
66 #define MCFDEBUG_CSR_RESET 0x00100000
67 #define MCFDEBUG_CSR_PSTCLK 0x00020000 /* PSTCLK disable */
68 #define MCFDEBUG_CSR_IPW 0x00010000 /* Inhibit processor writes */
69 #define MCFDEBUG_CSR_MAP 0x00008000 /* Processor refs in emul mode */
70 #define MCFDEBUG_CSR_TRC 0x00004000 /* Emul mode on trace exception */
71 #define MCFDEBUG_CSR_EMU 0x00002000 /* Force emulation mode */
72 #define MCFDEBUG_CSR_DDC_READ 0x00000800 /* Debug data control */
73 #define MCFDEBUG_CSR_DDC_WRITE 0x00001000
74 #define MCFDEBUG_CSR_UHE 0x00000400 /* User mode halt enable */
75 #define MCFDEBUG_CSR_BTB0 0x00000000 /* Branch target 0 bytes */
76 #define MCFDEBUG_CSR_BTB2 0x00000100 /* Branch target 2 bytes */
77 #define MCFDEBUG_CSR_BTB3 0x00000200 /* Branch target 3 bytes */
78 #define MCFDEBUG_CSR_BTB4 0x00000300 /* Branch target 4 bytes */
79 #define MCFDEBUG_CSR_NPL 0x00000040 /* Non-pipelined mode */
80 #define MCFDEBUG_CSR_SSM 0x00000010 /* Single step mode */
81 
82 /* Constants for the BDM address attribute register */
83 #define MCFDEBUG_BAAR_RESET 0x00000005
84 /* Fields not yet implemented */
85 
86 
87 /* This routine wrappers up the wdebug asm instruction so that the register
88  * and value can be relatively easily specified. The biggest hassle here is
89  * that the debug module instructions (2 longs) must be long word aligned and
90  * some pointer fiddling is performed to ensure this.
91  */
92 static inline void wdebug(int reg, unsigned long data) {
93  unsigned short dbg_spc[6];
94  unsigned short *dbg;
95 
96  // Force alignment to long word boundary
97  dbg = (unsigned short *)((((unsigned long)dbg_spc) + 3) & 0xfffffffc);
98 
99  // Build up the debug instruction
100  dbg[0] = 0x2c80 | (reg & 0xf);
101  dbg[1] = (data >> 16) & 0xffff;
102  dbg[2] = data & 0xffff;
103  dbg[3] = 0;
104 
105  // Perform the wdebug instruction
106 #if 0
107  // This strain is for gas which doesn't have the wdebug instructions defined
108  asm( "move.l %0, %%a0\n\t"
109  ".word 0xfbd0\n\t"
110  ".word 0x0003\n\t"
111  :: "g" (dbg) : "a0");
112 #else
113  // And this is for when it does
114  asm( "wdebug (%0)" :: "a" (dbg));
115 #endif
116 }
117 
118 #endif