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mcfwdebug.h
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mcfwdebug.h
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/****************************************************************************/
/*
* mcfdebug.h -- ColdFire Debug Module support.
*
* (C) Copyright 2001, Lineo Inc. (www.lineo.com)
*/
/****************************************************************************/
#ifndef mcfdebug_h
#define mcfdebug_h
/****************************************************************************/
/* Define the debug module registers */
#define MCFDEBUG_CSR 0x0 /* Configuration status */
#define MCFDEBUG_BAAR 0x5 /* BDM address attribute */
#define MCFDEBUG_AATR 0x6 /* Address attribute trigger */
#define MCFDEBUG_TDR 0x7 /* Trigger definition */
#define MCFDEBUG_PBR 0x8 /* PC breakpoint */
#define MCFDEBUG_PBMR 0x9 /* PC breakpoint mask */
#define MCFDEBUG_ABHR 0xc /* High address breakpoint */
#define MCFDEBUG_ABLR 0xd /* Low address breakpoint */
#define MCFDEBUG_DBR 0xe /* Data breakpoint */
#define MCFDEBUG_DBMR 0xf /* Data breakpoint mask */
/* Define some handy constants for the trigger definition register */
#define MCFDEBUG_TDR_TRC_DISP 0x00000000 /* display on DDATA only */
#define MCFDEBUG_TDR_TRC_HALT 0x40000000 /* Processor halt on BP */
#define MCFDEBUG_TDR_TRC_INTR 0x80000000 /* Debug intr on BP */
#define MCFDEBUG_TDR_LXT1 0x00004000 /* TDR level 1 */
#define MCFDEBUG_TDR_LXT2 0x00008000 /* TDR level 2 */
#define MCFDEBUG_TDR_EBL1 0x00002000 /* Enable breakpoint level 1 */
#define MCFDEBUG_TDR_EBL2 0x20000000 /* Enable breakpoint level 2 */
#define MCFDEBUG_TDR_EDLW1 0x00001000 /* Enable data BP longword */
#define MCFDEBUG_TDR_EDLW2 0x10000000
#define MCFDEBUG_TDR_EDWL1 0x00000800 /* Enable data BP lower word */
#define MCFDEBUG_TDR_EDWL2 0x08000000
#define MCFDEBUG_TDR_EDWU1 0x00000400 /* Enable data BP upper word */
#define MCFDEBUG_TDR_EDWU2 0x04000000
#define MCFDEBUG_TDR_EDLL1 0x00000200 /* Enable data BP low low byte */
#define MCFDEBUG_TDR_EDLL2 0x02000000
#define MCFDEBUG_TDR_EDLM1 0x00000100 /* Enable data BP low mid byte */
#define MCFDEBUG_TDR_EDLM2 0x01000000
#define MCFDEBUG_TDR_EDUM1 0x00000080 /* Enable data BP up mid byte */
#define MCFDEBUG_TDR_EDUM2 0x00800000
#define MCFDEBUG_TDR_EDUU1 0x00000040 /* Enable data BP up up byte */
#define MCFDEBUG_TDR_EDUU2 0x00400000
#define MCFDEBUG_TDR_DI1 0x00000020 /* Data BP invert */
#define MCFDEBUG_TDR_DI2 0x00200000
#define MCFDEBUG_TDR_EAI1 0x00000010 /* Enable address BP inverted */
#define MCFDEBUG_TDR_EAI2 0x00100000
#define MCFDEBUG_TDR_EAR1 0x00000008 /* Enable address BP range */
#define MCFDEBUG_TDR_EAR2 0x00080000
#define MCFDEBUG_TDR_EAL1 0x00000004 /* Enable address BP low */
#define MCFDEBUG_TDR_EAL2 0x00040000
#define MCFDEBUG_TDR_EPC1 0x00000002 /* Enable PC BP */
#define MCFDEBUG_TDR_EPC2 0x00020000
#define MCFDEBUG_TDR_PCI1 0x00000001 /* PC BP invert */
#define MCFDEBUG_TDR_PCI2 0x00010000
/* Constants for the address attribute trigger register */
#define MCFDEBUG_AAR_RESET 0x00000005
/* Fields not yet implemented */
/* And some definitions for the writable sections of the CSR */
#define MCFDEBUG_CSR_RESET 0x00100000
#define MCFDEBUG_CSR_PSTCLK 0x00020000 /* PSTCLK disable */
#define MCFDEBUG_CSR_IPW 0x00010000 /* Inhibit processor writes */
#define MCFDEBUG_CSR_MAP 0x00008000 /* Processor refs in emul mode */
#define MCFDEBUG_CSR_TRC 0x00004000 /* Emul mode on trace exception */
#define MCFDEBUG_CSR_EMU 0x00002000 /* Force emulation mode */
#define MCFDEBUG_CSR_DDC_READ 0x00000800 /* Debug data control */
#define MCFDEBUG_CSR_DDC_WRITE 0x00001000
#define MCFDEBUG_CSR_UHE 0x00000400 /* User mode halt enable */
#define MCFDEBUG_CSR_BTB0 0x00000000 /* Branch target 0 bytes */
#define MCFDEBUG_CSR_BTB2 0x00000100 /* Branch target 2 bytes */
#define MCFDEBUG_CSR_BTB3 0x00000200 /* Branch target 3 bytes */
#define MCFDEBUG_CSR_BTB4 0x00000300 /* Branch target 4 bytes */
#define MCFDEBUG_CSR_NPL 0x00000040 /* Non-pipelined mode */
#define MCFDEBUG_CSR_SSM 0x00000010 /* Single step mode */
/* Constants for the BDM address attribute register */
#define MCFDEBUG_BAAR_RESET 0x00000005
/* Fields not yet implemented */
/* This routine wrappers up the wdebug asm instruction so that the register
* and value can be relatively easily specified. The biggest hassle here is
* that the debug module instructions (2 longs) must be long word aligned and
* some pointer fiddling is performed to ensure this.
*/
static inline void wdebug(int reg, unsigned long data) {
unsigned short dbg_spc[6];
unsigned short *dbg;
// Force alignment to long word boundary
dbg = (unsigned short *)((((unsigned long)dbg_spc) + 3) & 0xfffffffc);
// Build up the debug instruction
dbg[0] = 0x2c80 | (reg & 0xf);
dbg[1] = (data >> 16) & 0xffff;
dbg[2] = data & 0xffff;
dbg[3] = 0;
// Perform the wdebug instruction
#if 0
// This strain is for gas which doesn't have the wdebug instructions defined
asm( "move.l %0, %%a0\n\t"
".word 0xfbd0\n\t"
".word 0x0003\n\t"
:: "g" (dbg) : "a0");
#else
// And this is for when it does
asm( "wdebug (%0)" :: "a" (dbg));
#endif
}
#endif