/* 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 -------------------- 01a,12jun02,hdn written */ /* DESCRIPTION: vmBaseArch32Lib.c provides the virtual memory mapping and virtual address translation that works with the bundled VM library. It provides 2 routines that are linked in when INCLUDE_MMU_BASIC and INCLUDE_MMU_P6_32BIT are both defined in the BSP. */ /* 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 to 32bit virtual space then * sets the specified state. * * RETURNS: OK, or ERROR if virtAddr or physical page addresses are not on * page boundaries, len is not a multiple of page size, or mapping failed. */ STATUS vmBaseArch32Map ( void * virtAddr, /* 32bit virtual address */ void * physAddr, /* 36bit 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 may be used to retrieve the mapping information * for a virtual address from the page translation tables. If the given * virtual address has never been mapped, either the returned status will * be ERROR, or, the returned status will be OK, but the returned physical * address will be -1. * If context is specified as NULL, the current context is used. * This routine is callable from interrupt level. * * RETURNS: OK, or validation failed, or translation failed. */ 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); }
