1/* SPDX-License-Identifier: GPL-2.0 */ 2/****************************************************************************/ 3 4/* 5 * mcfdebug.h -- ColdFire Debug Module support. 6 * 7 * (C) Copyright 2001, Lineo Inc. (www.lineo.com) 8 */ 9 10/****************************************************************************/ 11#ifndef mcfdebug_h 12#define mcfdebug_h 13/****************************************************************************/ 14 15/* Define the debug module registers */ 16#define MCFDEBUG_CSR 0x0 /* Configuration status */ 17#define MCFDEBUG_BAAR 0x5 /* BDM address attribute */ 18#define MCFDEBUG_AATR 0x6 /* Address attribute trigger */ 19#define MCFDEBUG_TDR 0x7 /* Trigger definition */ 20#define MCFDEBUG_PBR 0x8 /* PC breakpoint */ 21#define MCFDEBUG_PBMR 0x9 /* PC breakpoint mask */ 22#define MCFDEBUG_ABHR 0xc /* High address breakpoint */ 23#define MCFDEBUG_ABLR 0xd /* Low address breakpoint */ 24#define MCFDEBUG_DBR 0xe /* Data breakpoint */ 25#define MCFDEBUG_DBMR 0xf /* Data breakpoint mask */ 26 27/* Define some handy constants for the trigger definition register */ 28#define MCFDEBUG_TDR_TRC_DISP 0x00000000 /* display on DDATA only */ 29#define MCFDEBUG_TDR_TRC_HALT 0x40000000 /* Processor halt on BP */ 30#define MCFDEBUG_TDR_TRC_INTR 0x80000000 /* Debug intr on BP */ 31#define MCFDEBUG_TDR_LXT1 0x00004000 /* TDR level 1 */ 32#define MCFDEBUG_TDR_LXT2 0x00008000 /* TDR level 2 */ 33#define MCFDEBUG_TDR_EBL1 0x00002000 /* Enable breakpoint level 1 */ 34#define MCFDEBUG_TDR_EBL2 0x20000000 /* Enable breakpoint level 2 */ 35#define MCFDEBUG_TDR_EDLW1 0x00001000 /* Enable data BP longword */ 36#define MCFDEBUG_TDR_EDLW2 0x10000000 37#define MCFDEBUG_TDR_EDWL1 0x00000800 /* Enable data BP lower word */ 38#define MCFDEBUG_TDR_EDWL2 0x08000000 39#define MCFDEBUG_TDR_EDWU1 0x00000400 /* Enable data BP upper word */ 40#define MCFDEBUG_TDR_EDWU2 0x04000000 41#define MCFDEBUG_TDR_EDLL1 0x00000200 /* Enable data BP low low byte */ 42#define MCFDEBUG_TDR_EDLL2 0x02000000 43#define MCFDEBUG_TDR_EDLM1 0x00000100 /* Enable data BP low mid byte */ 44#define MCFDEBUG_TDR_EDLM2 0x01000000 45#define MCFDEBUG_TDR_EDUM1 0x00000080 /* Enable data BP up mid byte */ 46#define MCFDEBUG_TDR_EDUM2 0x00800000 47#define MCFDEBUG_TDR_EDUU1 0x00000040 /* Enable data BP up up byte */ 48#define MCFDEBUG_TDR_EDUU2 0x00400000 49#define MCFDEBUG_TDR_DI1 0x00000020 /* Data BP invert */ 50#define MCFDEBUG_TDR_DI2 0x00200000 51#define MCFDEBUG_TDR_EAI1 0x00000010 /* Enable address BP inverted */ 52#define MCFDEBUG_TDR_EAI2 0x00100000 53#define MCFDEBUG_TDR_EAR1 0x00000008 /* Enable address BP range */ 54#define MCFDEBUG_TDR_EAR2 0x00080000 55#define MCFDEBUG_TDR_EAL1 0x00000004 /* Enable address BP low */ 56#define MCFDEBUG_TDR_EAL2 0x00040000 57#define MCFDEBUG_TDR_EPC1 0x00000002 /* Enable PC BP */ 58#define MCFDEBUG_TDR_EPC2 0x00020000 59#define MCFDEBUG_TDR_PCI1 0x00000001 /* PC BP invert */ 60#define MCFDEBUG_TDR_PCI2 0x00010000 61 62/* Constants for the address attribute trigger register */ 63#define MCFDEBUG_AAR_RESET 0x00000005 64/* Fields not yet implemented */ 65 66/* And some definitions for the writable sections of the CSR */ 67#define MCFDEBUG_CSR_RESET 0x00100000 68#define MCFDEBUG_CSR_PSTCLK 0x00020000 /* PSTCLK disable */ 69#define MCFDEBUG_CSR_IPW 0x00010000 /* Inhibit processor writes */ 70#define MCFDEBUG_CSR_MAP 0x00008000 /* Processor refs in emul mode */ 71#define MCFDEBUG_CSR_TRC 0x00004000 /* Emul mode on trace exception */ 72#define MCFDEBUG_CSR_EMU 0x00002000 /* Force emulation mode */ 73#define MCFDEBUG_CSR_DDC_READ 0x00000800 /* Debug data control */ 74#define MCFDEBUG_CSR_DDC_WRITE 0x00001000 75#define MCFDEBUG_CSR_UHE 0x00000400 /* User mode halt enable */ 76#define MCFDEBUG_CSR_BTB0 0x00000000 /* Branch target 0 bytes */ 77#define MCFDEBUG_CSR_BTB2 0x00000100 /* Branch target 2 bytes */ 78#define MCFDEBUG_CSR_BTB3 0x00000200 /* Branch target 3 bytes */ 79#define MCFDEBUG_CSR_BTB4 0x00000300 /* Branch target 4 bytes */ 80#define MCFDEBUG_CSR_NPL 0x00000040 /* Non-pipelined mode */ 81#define MCFDEBUG_CSR_SSM 0x00000010 /* Single step mode */ 82 83/* Constants for the BDM address attribute register */ 84#define MCFDEBUG_BAAR_RESET 0x00000005 85/* Fields not yet implemented */ 86 87 88/* This routine wrappers up the wdebug asm instruction so that the register 89 * and value can be relatively easily specified. The biggest hassle here is 90 * that the debug module instructions (2 longs) must be long word aligned and 91 * some pointer fiddling is performed to ensure this. 92 */ 93static inline void wdebug(int reg, unsigned long data) { 94 unsigned short dbg_spc[6]; 95 unsigned short *dbg; 96 97 // Force alignment to long word boundary 98 dbg = (unsigned short *)((((unsigned long)dbg_spc) + 3) & 0xfffffffc); 99 100 // Build up the debug instruction 101 dbg[0] = 0x2c80 | (reg & 0xf); 102 dbg[1] = (data >> 16) & 0xffff; 103 dbg[2] = data & 0xffff; 104 dbg[3] = 0; 105 106 // Perform the wdebug instruction 107#if 0 108 // This strain is for gas which doesn't have the wdebug instructions defined 109 asm( "move.l %0, %%a0\n\t" 110 ".word 0xfbd0\n\t" 111 ".word 0x0003\n\t" 112 :: "g" (dbg) : "a0"); 113#else 114 // And this is for when it does 115 asm( "wdebug (%0)" :: "a" (dbg)); 116#endif 117} 118 119#endif 120