//--------------------------------------------------------------------------------
// BTSenableAtom.mac: BTS trace (DRAM) setup
//--------------------------------------------------------------------------------
// create data store in DRAM
puts("** Creating data store in DRAM **\n")
define ord8 dsBase = 0x100000                  // data store base address
define ord8 dsLength = 0x1000                         // data store size
define ord8 dsOverheadAreaSize = 0x50    // data store overhead area siz

//--------------------------------------------------------------------------------
// common code for DS/BTS initialization (DRAM)
//
// See Intel 64 and IA-32 Architecture Software Developer's Guide, Volume 3b, 
// Chapter 18 for more information                                            
//--------------------------------------------------------------------------------

// write DS base address MSR
IA32_DS_AREA = dsBase

// calculate BTS base address (just past overhead area)
define ord8 btsBase = dsBase + dsOverheadAreaSize

// calculate BTS entry size
define ord4 nBtmSize = 0n64 //stevelan (isem64t ? 24T : 12T)

// calculate number of entries in BTS
define ord4 nBtsEntries = (dsLength - dsOverheadAreaSize) / nBtmSize

// calculate BTS max address (1 byte past the last entry)
define ord8 btsMax = btsBase + nBtsEntries * nBtmSize

// initialize 32-bit DS overhead area
ord4  dsBase         = btsBase      	// set bts base address
ord4 (dsBase + 0x04) = 0x0				// High word clear
ord4 (dsBase + 0x08) = btsBase +8		// set bts index to start of bts
ord4 (dsBase + 0x0C) = 0x0				// High word clear
ord4 (dsBase + 0x10) = btsMax + 0x28	// set bts max address
ord4 (dsBase + 0x14) = 0x0				// High word clear
ord4 (dsBase + 0x18) = btsMax + 0x28	// set bts interrupt threshold past max (to disable)
ord4 (dsBase + 0x1C) = 0x0				// High word clear