/* vmBaseArch32Lib.c - VM (bundled) library for PentiumPro/2/3/4 32 bit mode */ /* Copyright 2002 Wind River Systems, Inc. */ #include "copyright_wrs.h" /* modification history -------------------- 01b,10oct02,hdn updated the documentation. (spr 82229) 01a,12jun02,hdn written */ /* DESCRIPTION: This library provides the virtual memory mapping and virtual address translation that works with the bundled VM library. The architecture specific VM library APIs are linked in automatically when INCLUDE_MMU_BASIC and INCLUDE_MMU_P6_32BIT are both defined in the BSP. The provided APIs are vmBaseArch32Map() and vmBaseArch32Translate(). The 4KB-page and 4MB-page are supported. The page size is configurable by VM_PAGE_SIZE macro in the BSP. INCLUDE FILES: mmuPro32Lib.h SEE ALSO: vmLib, Intel Architecture Software Developer's Manual */ /* includes */ #include "vxWorks.h" #include "errno.h" #include "mmuLib.h" #include "private/vmLibP.h" #include "arch/i86/mmuPro32Lib.h" /* imports */ IMPORT VM_CONTEXT * currentContext; /* vmBaseLib.c */ IMPORT MMU_LIB_FUNCS mmuLibFuncs; /* mmuLib.c */ /* defines */ #define NOT_PAGE_ALIGNED(addr) (((UINT)(addr)) & ((UINT)pageSize - 1)) #define MMU_PAGE_MAP (*(mmuLibFuncs.mmuPageMap)) #define MMU_TRANSLATE (*(mmuLibFuncs.mmuTranslate)) /**************************************************************************** * * vmBaseArch32LibInit - initialize the arch specific bundled VM library * * This routine links the arch specific bundled VM library into the VxWorks * system. It is called automatically when \%INCLUDE_MMU_BASIC and * \%INCLUDE_MMU_P6_32BIT are both defined in the BSP. * * RETURNS: N/A */ void vmBaseArch32LibInit (void) { } /**************************************************************************** * * vmBaseArch32Map - map 32bit physical to the 32bit virtual memory * * vmBaseArch32Map maps 32bit physical pages into a contiguous block of 32bit * virtual memory. and must be on page boundaries, * and must be evenly divisible by the page size. After the mapping * the specified state is set to all pages in the newly mapped virtual memory. * * This routine should not be called from interrupt level. * * RETURNS: OK, or ERROR if or are not on page * boundaries, is not a multiple of the page size, the validation fails, * or the mapping fails. * * ERRNO: * S_vmLib_NOT_PAGE_ALIGNED * */ STATUS vmBaseArch32Map ( void * virtAddr, /* 32bit virtual address */ void * physAddr, /* 32bit physical address */ UINT32 stateMask, /* state mask */ UINT32 state, /* state */ UINT32 len /* length */ ) { INT32 pageSize = vmBasePageSizeGet (); INT8 * thisVirtPage = (INT8 *) virtAddr; INT8 * thisPhysPage = (INT8 *) physAddr; FAST UINT32 numBytesProcessed = 0; STATUS retVal = OK; if (!vmLibInfo.vmBaseLibInstalled) return (ERROR); if ((NOT_PAGE_ALIGNED (thisVirtPage)) || (NOT_PAGE_ALIGNED (thisPhysPage)) || (NOT_PAGE_ALIGNED (len))) { errno = S_vmLib_NOT_PAGE_ALIGNED; return (ERROR); } semTake (¤tContext->sem, WAIT_FOREVER); while (numBytesProcessed < len) { if (MMU_PAGE_MAP (currentContext->mmuTransTbl, thisVirtPage, thisPhysPage) != OK) { retVal = ERROR; break; } if (vmBaseStateSet (currentContext, thisVirtPage, pageSize, stateMask, state) != OK) { retVal = ERROR; break; } thisVirtPage += pageSize; thisPhysPage += pageSize; numBytesProcessed += pageSize; } semGive (¤tContext->sem); return (retVal); } /**************************************************************************** * * vmBaseArch32Translate - translate a 32bit virtual address to a 32bit physical address * * vmBaseArch32Translate retrieves mapping information for a 32bit virtual * address from the page translation tables. If the specified virtual * address has never been mapped, the returned status is ERROR. * * This routine is callable from interrupt level. * * RETURNS: OK, or ERROR if validation or translation fails. */ STATUS vmBaseArch32Translate ( void * virtAddr, /* virtual address */ void ** physAddr /* place to put result */ ) { STATUS retVal; if (!vmLibInfo.vmBaseLibInstalled) return (ERROR); retVal = MMU_TRANSLATE (currentContext->mmuTransTbl, virtAddr, physAddr); return (retVal); }
