/*************************************************************************/ /*! @File @Title MMU PDump functions @Copyright Copyright (c) Imagination Technologies Ltd. All Rights Reserved @Description Common PDump (MMU specific) functions @License Dual MIT/GPLv2 The contents of this file are subject to the MIT license as set out below. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. Alternatively, the contents of this file may be used under the terms of the GNU General Public License Version 2 ("GPL") in which case the provisions of GPL are applicable instead of those above. If you wish to allow use of your version of this file only under the terms of GPL, and not to allow others to use your version of this file under the terms of the MIT license, indicate your decision by deleting the provisions above and replace them with the notice and other provisions required by GPL as set out in the file called "GPL-COPYING" included in this distribution. If you do not delete the provisions above, a recipient may use your version of this file under the terms of either the MIT license or GPL. This License is also included in this distribution in the file called "MIT-COPYING". EXCEPT AS OTHERWISE STATED IN A NEGOTIATED AGREEMENT: (A) THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT; AND (B) IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /***************************************************************************/ #if defined (PDUMP) #include "img_types.h" #include "pdump_mmu.h" #include "pdump_osfunc.h" #include "pdump_km.h" #include "pdump_physmem.h" #include "osfunc.h" #include "pvr_debug.h" #include "pvrsrv_error.h" #define MAX_PDUMP_MMU_CONTEXTS (10) static IMG_UINT32 guiPDumpMMUContextAvailabilityMask = (1< 0) { /* do some tests for contiguity. If it fails, we flush anyway */ if (pvBeyondLastPointer != pvBytes || ui32SymAddrOffset != ui32BeyondLastOffset /* NB: ought to check that symbolic name agrees too, but we know this always to be the case in the current use-case */ ) { bFlush = IMG_TRUE; } } /* Flush if necessary */ if (bFlush && uiAccumulatedBytes > 0) { eErr = PDumpWriteParameter((IMG_UINT8 *)(uintptr_t)pvBasePointer, uiAccumulatedBytes, ui32Flags, &ui32ParamOutPos, pszFileName); if (eErr == PVRSRV_OK) { eErr = PDumpOSBufprintf(hScript, ui32MaxLenScript, "LDB %s:0x%X 0x%X 0x%X %s", /* dest */ pszSymbolicName, ui32BaseOffset, /* size */ uiAccumulatedBytes, /* file offset */ ui32ParamOutPos, /* filename */ pszFileName); PVR_LOGG_IF_ERROR(eErr, "PDumpOSBufprintf", ErrOut); PDumpWriteScript(hScript, ui32Flags); } else if (eErr != PVRSRV_ERROR_PDUMP_NOT_ALLOWED) { PVR_LOGG_IF_ERROR(eErr, "PDumpWriteParameter", ErrOut); } else { /* else Write to parameter file prevented under the flags and * current state of the driver so skip write to script and error IF. */ eErr = PVRSRV_OK; } uiAccumulatedBytes = 0; } /* Initialise offsets and pointers if necessary */ if (uiAccumulatedBytes == 0) { ui32BaseOffset = ui32BeyondLastOffset = ui32SymAddrOffset; pvBeyondLastPointer = pvBasePointer = (const IMG_CHAR *)pvBytes; } /* Accumulate some bytes */ ui32BeyondLastOffset += uiNumBytes; pvBeyondLastPointer += uiNumBytes; uiAccumulatedBytes += uiNumBytes; ErrOut: return eErr; } /************************************************************************** * Function Name : PDumpMMUMalloc * Inputs : * Outputs : * Returns : PVRSRV_ERROR * Description : **************************************************************************/ PVRSRV_ERROR PDumpMMUMalloc(const IMG_CHAR *pszPDumpDevName, MMU_LEVEL eMMULevel, IMG_DEV_PHYADDR *psDevPAddr, IMG_UINT32 ui32Size, IMG_UINT32 ui32Align, PDUMP_MMU_TYPE eMMUType) { PVRSRV_ERROR eErr = PVRSRV_OK; IMG_UINT32 ui32Flags = PDUMP_FLAGS_CONTINUOUS; IMG_UINT64 ui64SymbolicAddr; IMG_CHAR *pszMMUPX; PDUMP_GET_SCRIPT_STRING(); if (eMMULevel >= MMU_LEVEL_LAST) { eErr = PVRSRV_ERROR_INVALID_PARAMS; goto ErrOut; } PDUMP_LOCK(); /* Write a comment to the PDump2 script streams indicating the memory allocation */ eErr = PDumpOSBufprintf(hScript, ui32MaxLen, "-- MALLOC :%s:%s Size=0x%08X Alignment=0x%08X DevPAddr=0x%08llX", pszPDumpDevName, ai8MMULevelStringLookup[eMMULevel], ui32Size, ui32Align, psDevPAddr->uiAddr); if(eErr != PVRSRV_OK) { goto ErrUnlock; } PDumpWriteScript(hScript, ui32Flags); /* construct the symbolic address */ ui64SymbolicAddr = (IMG_UINT64)psDevPAddr->uiAddr; /* Write to the MMU script stream indicating the memory allocation */ if (eMMUType == PDUMP_MMU_TYPE_MIPS_MICROAPTIV) { pszMMUPX = MIPSMMUPX_FMT(eMMULevel); } else { pszMMUPX = MMUPX_FMT(eMMULevel); } eErr = PDumpOSBufprintf(hScript, ui32MaxLen, "MALLOC :%s:%s%016llX 0x%X 0x%X", pszPDumpDevName, pszMMUPX, ui64SymbolicAddr, ui32Size, ui32Align /* don't need this sDevPAddr.uiAddr*/); if(eErr != PVRSRV_OK) { goto ErrUnlock; } PDumpWriteScript(hScript, ui32Flags); ErrUnlock: PDUMP_UNLOCK(); ErrOut: return eErr; } /************************************************************************** * Function Name : PDumpMMUFree * Inputs : * Outputs : * Returns : PVRSRV_ERROR * Description : **************************************************************************/ PVRSRV_ERROR PDumpMMUFree(const IMG_CHAR *pszPDumpDevName, MMU_LEVEL eMMULevel, IMG_DEV_PHYADDR *psDevPAddr, PDUMP_MMU_TYPE eMMUType) { PVRSRV_ERROR eErr = PVRSRV_OK; IMG_UINT64 ui64SymbolicAddr; IMG_UINT32 ui32Flags = PDUMP_FLAGS_CONTINUOUS; IMG_CHAR *pszMMUPX; PDUMP_GET_SCRIPT_STRING(); if (eMMULevel >= MMU_LEVEL_LAST) { eErr = PVRSRV_ERROR_INVALID_PARAMS; goto ErrOut; } PDUMP_LOCK(); /* Write a comment to the PDUMP2 script streams indicating the memory free */ eErr = PDumpOSBufprintf(hScript, ui32MaxLen, "-- FREE :%s:%s", pszPDumpDevName, ai8MMULevelStringLookup[eMMULevel]); if(eErr != PVRSRV_OK) { goto ErrUnlock; } PDumpWriteScript(hScript, ui32Flags); /* construct the symbolic address */ ui64SymbolicAddr = (IMG_UINT64)psDevPAddr->uiAddr; /* Write to the MMU script stream indicating the memory free */ if (eMMUType == PDUMP_MMU_TYPE_MIPS_MICROAPTIV) { pszMMUPX = MIPSMMUPX_FMT(eMMULevel); } else { pszMMUPX = MMUPX_FMT(eMMULevel); } eErr = PDumpOSBufprintf(hScript, ui32MaxLen, "FREE :%s:%s%016llX", pszPDumpDevName, pszMMUPX, ui64SymbolicAddr); if(eErr != PVRSRV_OK) { goto ErrUnlock; } PDumpWriteScript(hScript, ui32Flags); ErrUnlock: PDUMP_UNLOCK(); ErrOut: return eErr; } /************************************************************************** * Function Name : PDumpMMUMalloc2 * Inputs : * Outputs : * Returns : PVRSRV_ERROR * Description : **************************************************************************/ PVRSRV_ERROR PDumpMMUMalloc2(const IMG_CHAR *pszPDumpDevName, const IMG_CHAR *pszTableType,/* PAGE_CATALOGUE, PAGE_DIRECTORY, PAGE_TABLE */ const IMG_CHAR *pszSymbolicAddr, IMG_UINT32 ui32Size, IMG_UINT32 ui32Align) { PVRSRV_ERROR eErr = PVRSRV_OK; IMG_UINT32 ui32Flags = PDUMP_FLAGS_CONTINUOUS; PDUMP_GET_SCRIPT_STRING(); PDUMP_LOCK(); /* Write a comment to the PDump2 script streams indicating the memory allocation */ eErr = PDumpOSBufprintf(hScript, ui32MaxLen, "-- MALLOC :%s:%s Size=0x%08X Alignment=0x%08X\n", pszPDumpDevName, pszTableType, ui32Size, ui32Align); if(eErr != PVRSRV_OK) { goto ErrUnlock; } PDumpWriteScript(hScript, ui32Flags); /* Write to the MMU script stream indicating the memory allocation */ eErr = PDumpOSBufprintf(hScript, ui32MaxLen, "MALLOC :%s:%s 0x%X 0x%X\n", pszPDumpDevName, pszSymbolicAddr, ui32Size, ui32Align /* don't need this sDevPAddr.uiAddr*/); if(eErr != PVRSRV_OK) { goto ErrUnlock; } PDumpWriteScript(hScript, ui32Flags); ErrUnlock: PDUMP_UNLOCK(); return eErr; } /************************************************************************** * Function Name : PDumpMMUFree2 * Inputs : * Outputs : * Returns : PVRSRV_ERROR * Description : **************************************************************************/ PVRSRV_ERROR PDumpMMUFree2(const IMG_CHAR *pszPDumpDevName, const IMG_CHAR *pszTableType,/* PAGE_CATALOGUE, PAGE_DIRECTORY, PAGE_TABLE */ const IMG_CHAR *pszSymbolicAddr) { PVRSRV_ERROR eErr = PVRSRV_OK; IMG_UINT32 ui32Flags = PDUMP_FLAGS_CONTINUOUS; PDUMP_GET_SCRIPT_STRING(); PDUMP_LOCK(); /* Write a comment to the PDUMP2 script streams indicating the memory free */ eErr = PDumpOSBufprintf(hScript, ui32MaxLen, "-- FREE :%s:%s\n", pszPDumpDevName, pszTableType); if(eErr != PVRSRV_OK) { goto ErrUnlock; } PDumpWriteScript(hScript, ui32Flags); /* Write to the MMU script stream indicating the memory free */ eErr = PDumpOSBufprintf(hScript, ui32MaxLen, "FREE :%s:%s\n", pszPDumpDevName, pszSymbolicAddr); if(eErr != PVRSRV_OK) { goto ErrUnlock; } PDumpWriteScript(hScript, ui32Flags); ErrUnlock: PDUMP_UNLOCK(); return eErr; } /******************************************************************************************************* * Function Name : PDumpPTBaseObjectToMem64 * Outputs : None * Returns : PVRSRV_ERROR * Description : Create a PDUMP string, which represents a memory write from the baseobject * for MIPS MMU device type ********************************************************************************************************/ PVRSRV_ERROR PDumpPTBaseObjectToMem64(const IMG_CHAR *pszPDumpDevName, PMR *psPMRDest, IMG_DEVMEM_OFFSET_T uiLogicalOffsetSource, IMG_DEVMEM_OFFSET_T uiLogicalOffsetDest, IMG_UINT32 ui32Flags, MMU_LEVEL eMMULevel, IMG_UINT64 ui64PxSymAddr) { IMG_CHAR aszMemspaceNameDest[PHYSMEM_PDUMP_MEMSPACE_MAX_LENGTH]; IMG_CHAR aszSymbolicNameDest[PHYSMEM_PDUMP_SYMNAME_MAX_LENGTH]; IMG_DEVMEM_OFFSET_T uiPDumpSymbolicOffsetDest; IMG_DEVMEM_OFFSET_T uiNextSymNameDest; PVRSRV_ERROR eErr = PVRSRV_OK; PDUMP_GET_SCRIPT_STRING() eErr = PMR_PDumpSymbolicAddr(psPMRDest, uiLogicalOffsetDest, PHYSMEM_PDUMP_MEMSPACE_MAX_LENGTH, aszMemspaceNameDest, PHYSMEM_PDUMP_SYMNAME_MAX_LENGTH, aszSymbolicNameDest, &uiPDumpSymbolicOffsetDest, &uiNextSymNameDest); if (eErr != PVRSRV_OK) { return eErr; } PDUMP_LOCK(); eErr = PDumpOSBufprintf(hScript, ui32MaxLen, "WRW64 :%s:%s:0x%llX :%s:%s%016llX:0x%llX",aszMemspaceNameDest, aszSymbolicNameDest, uiPDumpSymbolicOffsetDest, pszPDumpDevName, MIPSMMUPX_FMT(eMMULevel), ui64PxSymAddr, (IMG_UINT64)0); if (eErr != PVRSRV_OK) { PDUMP_UNLOCK(); return eErr; } PDumpWriteScript(hScript, ui32Flags); PDUMP_UNLOCK(); return PVRSRV_OK; } /************************************************************************** * Function Name : PDumpMMUDumpPxEntries * Inputs : * Outputs : * Returns : PVRSRV_ERROR * Description : **************************************************************************/ PVRSRV_ERROR PDumpMMUDumpPxEntries(MMU_LEVEL eMMULevel, const IMG_CHAR *pszPDumpDevName, void *pvPxMem, IMG_DEV_PHYADDR sPxDevPAddr, IMG_UINT32 uiFirstEntry, IMG_UINT32 uiNumEntries, const IMG_CHAR *pszMemspaceName, const IMG_CHAR *pszSymbolicAddr, IMG_UINT64 uiSymbolicAddrOffset, IMG_UINT32 uiBytesPerEntry, IMG_UINT32 uiLog2Align, IMG_UINT32 uiAddrShift, IMG_UINT64 uiAddrMask, IMG_UINT64 uiPxEProtMask, IMG_UINT64 uiDataValidEnable, IMG_UINT32 ui32Flags, PDUMP_MMU_TYPE eMMUType) { PVRSRV_ERROR eErr = PVRSRV_OK; IMG_UINT64 ui64PxSymAddr; IMG_UINT64 ui64PxEValueSymAddr; IMG_UINT32 ui32SymAddrOffset = 0; IMG_UINT32 *pui32PxMem; IMG_UINT64 *pui64PxMem; IMG_BOOL bPxEValid; IMG_UINT32 uiPxEIdx; IMG_INT32 iShiftAmount; IMG_CHAR *pszWrwSuffix = 0; void *pvRawBytes = 0; IMG_CHAR aszPxSymbolicAddr[PHYSMEM_PDUMP_SYMNAME_MAX_LENGTH]; IMG_UINT64 ui64PxE64; IMG_UINT64 ui64Protflags64; IMG_CHAR *pszMMUPX; PDUMP_GET_SCRIPT_STRING(); if (!PDumpReady()) { eErr = PVRSRV_ERROR_PDUMP_NOT_AVAILABLE; goto ErrOut; } if (PDumpIsDumpSuspended()) { eErr = PVRSRV_OK; goto ErrOut; } if (pvPxMem == NULL) { eErr = PVRSRV_ERROR_INVALID_PARAMS; goto ErrOut; } /* create the symbolic address of the Px */ ui64PxSymAddr = sPxDevPAddr.uiAddr; if (eMMUType == PDUMP_MMU_TYPE_MIPS_MICROAPTIV) { pszMMUPX = MIPSMMUPX_FMT(eMMULevel); } else { pszMMUPX = MMUPX_FMT(eMMULevel); } OSSNPrintf(aszPxSymbolicAddr, PHYSMEM_PDUMP_SYMNAME_MAX_LENGTH, ":%s:%s%016llX", pszPDumpDevName, pszMMUPX, ui64PxSymAddr); PDUMP_LOCK(); /* traverse PxEs, dumping entries */ for(uiPxEIdx = uiFirstEntry; uiPxEIdx < uiFirstEntry + uiNumEntries; uiPxEIdx++) { /* Calc the symbolic address offset of the PxE location This is what we have to add to the table address to get to a certain entry */ ui32SymAddrOffset = (uiPxEIdx*uiBytesPerEntry); /* Calc the symbolic address of the PxE value and HW protflags */ /* just read it here */ switch(uiBytesPerEntry) { case 4: { pui32PxMem = pvPxMem; ui64PxE64 = pui32PxMem[uiPxEIdx]; pszWrwSuffix = ""; pvRawBytes = &pui32PxMem[uiPxEIdx]; break; } case 8: { pui64PxMem = pvPxMem; ui64PxE64 = pui64PxMem[uiPxEIdx]; pszWrwSuffix = "64"; pvRawBytes = &pui64PxMem[uiPxEIdx]; break; } default: { PVR_DPF((PVR_DBG_ERROR, "PDumpMMUPxEntries: error")); ui64PxE64 = 0; //!!error break; } } ui64PxEValueSymAddr = (ui64PxE64 & uiAddrMask) >> uiAddrShift << uiLog2Align; ui64Protflags64 = ui64PxE64 & uiPxEProtMask; bPxEValid = (ui64Protflags64 & uiDataValidEnable) ? IMG_TRUE : IMG_FALSE; if(bPxEValid) { _ContiguousPDumpBytes(aszPxSymbolicAddr, ui32SymAddrOffset, IMG_TRUE, 0, 0, ui32Flags | PDUMP_FLAGS_CONTINUOUS); iShiftAmount = (IMG_INT32)(uiLog2Align - uiAddrShift); /* First put the symbolic representation of the actual address of the entry into a pdump internal register */ /* MOV seemed cleaner here, since (a) it's 64-bit; (b) the target is not memory. However, MOV cannot do the "reference" of the symbolic address. Apparently WRW is correct. */ if (pszSymbolicAddr == NULL) { pszSymbolicAddr = "none"; } if (eMMULevel == MMU_LEVEL_1) { if (iShiftAmount == 0) { eErr = PDumpOSBufprintf(hScript, ui32MaxLen, "WRW%s :%s:%s%016llX:0x%08X :%s:%s:0x%llx | 0x%llX\n", pszWrwSuffix, /* dest */ pszPDumpDevName, pszMMUPX, ui64PxSymAddr, ui32SymAddrOffset, /* src */ pszMemspaceName, pszSymbolicAddr, uiSymbolicAddrOffset, /* ORing prot flags */ ui64Protflags64); } else { eErr = PDumpOSBufprintf(hScript, ui32MaxLen, "WRW :%s:$1 :%s:%s:0x%llx\n", /* dest */ pszPDumpDevName, /* src */ pszMemspaceName, pszSymbolicAddr, uiSymbolicAddrOffset); } } else { if (eMMUType == PDUMP_MMU_TYPE_MIPS_MICROAPTIV) { pszMMUPX = MIPSMMUPX_FMT(eMMULevel - 1); } else { pszMMUPX = MMUPX_FMT(eMMULevel - 1); } eErr = PDumpOSBufprintf(hScript, ui32MaxLen, "WRW :%s:$1 :%s:%s%016llX:0x0", /* dest */ pszPDumpDevName, /* src */ pszPDumpDevName, pszMMUPX, ui64PxEValueSymAddr); if (eMMUType == PDUMP_MMU_TYPE_MIPS_MICROAPTIV) { pszMMUPX = MIPSMMUPX_FMT(eMMULevel); } else { pszMMUPX = MMUPX_FMT(eMMULevel); } } if (eErr != PVRSRV_OK) { goto ErrUnlock; } PDumpWriteScript(hScript, ui32Flags | PDUMP_FLAGS_CONTINUOUS); /* Now shift it to the right place, if necessary: */ /* Now shift that value down, by the "Align shift" amount, to get it into units (ought to assert that we get an integer - i.e. we don't shift any bits off the bottom, don't know how to do PDUMP assertions yet) and then back up by the right amount to get it into the position of the field. This is optimised into a single shift right by the difference between the two. */ if (iShiftAmount > 0) { /* Page X Address is specified in units larger than the position in the PxE would suggest. */ eErr = PDumpOSBufprintf(hScript, ui32MaxLen, "SHR :%s:$1 :%s:$1 0x%X", /* dest */ pszPDumpDevName, /* src A */ pszPDumpDevName, /* src B */ iShiftAmount); if (eErr != PVRSRV_OK) { goto ErrUnlock; } PDumpWriteScript(hScript, ui32Flags | PDUMP_FLAGS_CONTINUOUS); } else if (iShiftAmount < 0) { /* Page X Address is specified in units smaller than the position in the PxE would suggest. */ eErr = PDumpOSBufprintf(hScript, ui32MaxLen, "SHL :%s:$1 :%s:$1 0x%X", /* dest */ pszPDumpDevName, /* src A */ pszPDumpDevName, /* src B */ -iShiftAmount); if (eErr != PVRSRV_OK) { goto ErrUnlock; } PDumpWriteScript(hScript, ui32Flags | PDUMP_FLAGS_CONTINUOUS); } if (eMMULevel == MMU_LEVEL_1) { if( iShiftAmount != 0) { /* Now we can "or" in the protection flags */ eErr = PDumpOSBufprintf(hScript, ui32MaxLen, "OR :%s:$1 :%s:$1 0x%llX", /* dest */ pszPDumpDevName, /* src A */ pszPDumpDevName, /* src B */ ui64Protflags64); if (eErr != PVRSRV_OK) { goto ErrUnlock; } PDumpWriteScript(hScript, ui32Flags | PDUMP_FLAGS_CONTINUOUS); eErr = PDumpOSBufprintf(hScript, ui32MaxLen, "WRW%s :%s:%s%016llX:0x%08X :%s:$1 ", pszWrwSuffix, /* dest */ pszPDumpDevName, pszMMUPX, ui64PxSymAddr, ui32SymAddrOffset, /* src */ pszPDumpDevName); if(eErr != PVRSRV_OK) { goto ErrUnlock; } PDumpWriteScript(hScript, ui32Flags | PDUMP_FLAGS_CONTINUOUS); } } else { /* Now we can "or" in the protection flags */ eErr = PDumpOSBufprintf(hScript, ui32MaxLen, "OR :%s:$1 :%s:$1 0x%llX", /* dest */ pszPDumpDevName, /* src A */ pszPDumpDevName, /* src B */ ui64Protflags64); if (eErr != PVRSRV_OK) { goto ErrUnlock; } PDumpWriteScript(hScript, ui32Flags | PDUMP_FLAGS_CONTINUOUS); /* Finally, we write the register into the actual PxE */ eErr = PDumpOSBufprintf(hScript, ui32MaxLen, "WRW%s :%s:%s%016llX:0x%08X :%s:$1", pszWrwSuffix, /* dest */ pszPDumpDevName, pszMMUPX, ui64PxSymAddr, ui32SymAddrOffset, /* src */ pszPDumpDevName); if(eErr != PVRSRV_OK) { goto ErrUnlock; } PDumpWriteScript(hScript, ui32Flags | PDUMP_FLAGS_CONTINUOUS); } } else { /* If the entry was "invalid", simply write the actual value found to the memory location */ eErr = _ContiguousPDumpBytes(aszPxSymbolicAddr, ui32SymAddrOffset, IMG_FALSE, uiBytesPerEntry, pvRawBytes, ui32Flags | PDUMP_FLAGS_CONTINUOUS); if (eErr != PVRSRV_OK) { goto ErrUnlock; } } } /* flush out any partly accumulated stuff for LDB */ _ContiguousPDumpBytes(aszPxSymbolicAddr, ui32SymAddrOffset, IMG_TRUE, 0, 0, ui32Flags | PDUMP_FLAGS_CONTINUOUS); ErrUnlock: PDUMP_UNLOCK(); ErrOut: return eErr; } /************************************************************************** * Function Name : _PdumpAllocMMUContext * Inputs : pui32MMUContextID * Outputs : None * Returns : PVRSRV_ERROR * Description : pdump util to allocate MMU contexts **************************************************************************/ static PVRSRV_ERROR _PdumpAllocMMUContext(IMG_UINT32 *pui32MMUContextID) { IMG_UINT32 i; /* there are MAX_PDUMP_MMU_CONTEXTS contexts available, find one */ for(i=0; i