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Diffstat (limited to 'arch/arm/cpu/ixp/npe/IxOsalIoMem.c')
| -rw-r--r-- | arch/arm/cpu/ixp/npe/IxOsalIoMem.c | 332 |
1 files changed, 332 insertions, 0 deletions
diff --git a/arch/arm/cpu/ixp/npe/IxOsalIoMem.c b/arch/arm/cpu/ixp/npe/IxOsalIoMem.c new file mode 100644 index 0000000000..34df92bf79 --- /dev/null +++ b/arch/arm/cpu/ixp/npe/IxOsalIoMem.c @@ -0,0 +1,332 @@ +/** + * @file IxOsalIoMem.c + * + * @brief OS-independent IO/Mem implementation + * + * + * @par + * IXP400 SW Release version 2.0 + * + * -- Copyright Notice -- + * + * @par + * Copyright 2001-2005, Intel Corporation. + * All rights reserved. + * + * @par + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the Intel Corporation nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * @par + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @par + * -- End of Copyright Notice -- + */ + +/* Access to the global mem map is only allowed in this file */ +#define IxOsalIoMem_C + +#include "IxOsal.h" + +#define SEARCH_PHYSICAL_ADDRESS (1) +#define SEARCH_VIRTUAL_ADDRESS (2) + +/* + * Searches for map using one of the following criteria: + * + * - enough room to include a zone starting with the physical "requestedAddress" of size "size" (for mapping) + * - includes the virtual "requestedAddress" in its virtual address space (already mapped, for unmapping) + * - correct coherency + * + * Returns a pointer to the map or NULL if a suitable map is not found. + */ +PRIVATE IxOsalMemoryMap * +ixOsalMemMapFind (UINT32 requestedAddress, + UINT32 size, UINT32 searchCriteria, UINT32 requestedEndianType) +{ + UINT32 mapIndex; + + UINT32 numMapElements = + sizeof (ixOsalGlobalMemoryMap) / sizeof (IxOsalMemoryMap); + + for (mapIndex = 0; mapIndex < numMapElements; mapIndex++) + { + IxOsalMemoryMap *map = &ixOsalGlobalMemoryMap[mapIndex]; + + if (searchCriteria == SEARCH_PHYSICAL_ADDRESS + && requestedAddress >= map->physicalAddress + && (requestedAddress + size) <= (map->physicalAddress + map->size) + && (map->mapEndianType & requestedEndianType) != 0) + { + return map; + } + else if (searchCriteria == SEARCH_VIRTUAL_ADDRESS + && requestedAddress >= map->virtualAddress + && requestedAddress <= (map->virtualAddress + map->size) + && (map->mapEndianType & requestedEndianType) != 0) + { + return map; + } + else if (searchCriteria == SEARCH_PHYSICAL_ADDRESS) + { + ixOsalLog (IX_OSAL_LOG_LVL_DEBUG3, + IX_OSAL_LOG_DEV_STDOUT, + "Osal: Checking [phys addr 0x%x:size 0x%x:endianType %d]\n", + map->physicalAddress, map->size, map->mapEndianType, 0, 0, 0); + } + } + + /* + * not found + */ + return NULL; +} + +/* + * This function maps an I/O mapped physical memory zone of the given size + * into a virtual memory zone accessible by the caller and returns a cookie - + * the start address of the virtual memory zone. + * IX_OSAL_MMAP_PHYS_TO_VIRT should NOT therefore be used on the returned + * virtual address. + * The memory zone is to be unmapped using ixOsalMemUnmap once the caller has + * finished using this zone (e.g. on driver unload) using the cookie as + * parameter. + * The IX_OSAL_READ/WRITE_LONG/SHORT macros should be used to read and write + * the mapped memory, adding the necessary offsets to the address cookie. + * + * Note: this function is not to be used directly. Use IX_OSAL_MEM_MAP + * instead. + */ +PUBLIC void * +ixOsalIoMemMap (UINT32 requestedAddress, + UINT32 size, IxOsalMapEndianessType requestedEndianType) +{ + IxOsalMemoryMap *map; + + ixOsalLog (IX_OSAL_LOG_LVL_DEBUG3, + IX_OSAL_LOG_DEV_STDOUT, + "OSAL: Mapping [addr 0x%x:size 0x%x:endianType %d]\n", + requestedAddress, size, requestedEndianType, 0, 0, 0); + + if (requestedEndianType == IX_OSAL_LE) + { + ixOsalLog (IX_OSAL_LOG_LVL_ERROR, + IX_OSAL_LOG_DEV_STDOUT, + "ixOsalIoMemMap: Please specify component coherency mode to use MEM functions \n", + 0, 0, 0, 0, 0, 0); + return (NULL); + } + map = ixOsalMemMapFind (requestedAddress, + size, SEARCH_PHYSICAL_ADDRESS, requestedEndianType); + if (map != NULL) + { + UINT32 offset = requestedAddress - map->physicalAddress; + + ixOsalLog (IX_OSAL_LOG_LVL_DEBUG3, + IX_OSAL_LOG_DEV_STDOUT, "OSAL: Found map [", 0, 0, 0, 0, 0, 0); + ixOsalLog (IX_OSAL_LOG_LVL_DEBUG3, + IX_OSAL_LOG_DEV_STDOUT, map->name, 0, 0, 0, 0, 0, 0); + ixOsalLog (IX_OSAL_LOG_LVL_DEBUG3, + IX_OSAL_LOG_DEV_STDOUT, + ":addr 0x%x: virt 0x%x:size 0x%x:ref %d:endianType %d]\n", + map->physicalAddress, map->virtualAddress, + map->size, map->refCount, map->mapEndianType, 0); + + if (map->type == IX_OSAL_DYNAMIC_MAP && map->virtualAddress == 0) + { + if (map->mapFunction != NULL) + { + map->mapFunction (map); + + if (map->virtualAddress == 0) + { + /* + * failed + */ + ixOsalLog (IX_OSAL_LOG_LVL_FATAL, + IX_OSAL_LOG_DEV_STDERR, + "OSAL: Remap failed - [addr 0x%x:size 0x%x:endianType %d]\n", + requestedAddress, size, requestedEndianType, 0, 0, 0); + return NULL; + } + } + else + { + /* + * error, no map function for a dynamic map + */ + ixOsalLog (IX_OSAL_LOG_LVL_FATAL, + IX_OSAL_LOG_DEV_STDERR, + "OSAL: No map function for a dynamic map - " + "[addr 0x%x:size 0x%x:endianType %d]\n", + requestedAddress, size, requestedEndianType, 0, 0, 0); + + return NULL; + } + } + + /* + * increment reference count + */ + map->refCount++; + + return (void *) (map->virtualAddress + offset); + } + + /* + * requested address is not described in the global memory map + */ + ixOsalLog (IX_OSAL_LOG_LVL_FATAL, + IX_OSAL_LOG_DEV_STDERR, + "OSAL: No mapping found - [addr 0x%x:size 0x%x:endianType %d]\n", + requestedAddress, size, requestedEndianType, 0, 0, 0); + return NULL; +} + +/* + * This function unmaps a previously mapped I/O memory zone using + * the cookie obtained in the mapping operation. The memory zone in question + * becomes unavailable to the caller once unmapped and the cookie should be + * discarded. + * + * This function cannot fail if the given parameter is correct and does not + * return a value. + * + * Note: this function is not to be used directly. Use IX_OSAL_MEM_UNMAP + * instead. + */ +PUBLIC void +ixOsalIoMemUnmap (UINT32 requestedAddress, UINT32 endianType) +{ + IxOsalMemoryMap *map; + + if (endianType == IX_OSAL_LE) + { + ixOsalLog (IX_OSAL_LOG_LVL_ERROR, + IX_OSAL_LOG_DEV_STDOUT, + "ixOsalIoMemUnmap: Please specify component coherency mode to use MEM functions \n", + 0, 0, 0, 0, 0, 0); + return; + } + + if (requestedAddress == 0) + { + /* + * invalid virtual address + */ + return; + } + + map = + ixOsalMemMapFind (requestedAddress, 0, SEARCH_VIRTUAL_ADDRESS, + endianType); + + if (map != NULL) + { + if (map->refCount > 0) + { + /* + * decrement reference count + */ + map->refCount--; + + if (map->refCount == 0) + { + /* + * no longer used, deallocate + */ + if (map->type == IX_OSAL_DYNAMIC_MAP + && map->unmapFunction != NULL) + { + map->unmapFunction (map); + } + } + } + } + else + { + ixOsalLog (IX_OSAL_LOG_LVL_WARNING, + IX_OSAL_LOG_DEV_STDERR, + "OSAL: ixOsServMemUnmap didn't find the requested map " + "[virt addr 0x%x: endianType %d], ignoring call\n", + requestedAddress, endianType, 0, 0, 0, 0); + } +} + +/* + * This function Converts a virtual address into a physical + * address, including the dynamically mapped memory. + * + * Parameters virtAddr - virtual address to convert + * Return value: corresponding physical address, or NULL + * if there is no physical address addressable + * by the given virtual address + * OS: VxWorks, Linux, WinCE, QNX, eCos + * Reentrant: Yes + * IRQ safe: Yes + */ +PUBLIC UINT32 +ixOsalIoMemVirtToPhys (UINT32 virtualAddress, UINT32 requestedCoherency) +{ + IxOsalMemoryMap *map = + ixOsalMemMapFind (virtualAddress, 0, SEARCH_VIRTUAL_ADDRESS, + requestedCoherency); + + if (map != NULL) + { + return map->physicalAddress + virtualAddress - map->virtualAddress; + } + else + { + return (UINT32) IX_OSAL_MMU_VIRT_TO_PHYS (virtualAddress); + } +} + +/* + * This function Converts a virtual address into a physical + * address, including the dynamically mapped memory. + * + * Parameters virtAddr - virtual address to convert + * Return value: corresponding physical address, or NULL + * if there is no physical address addressable + * by the given virtual address + * OS: VxWorks, Linux, WinCE, QNX, eCos + * Reentrant: Yes + * IRQ safe: Yes + */ +PUBLIC UINT32 +ixOsalIoMemPhysToVirt (UINT32 physicalAddress, UINT32 requestedCoherency) +{ + IxOsalMemoryMap *map = + ixOsalMemMapFind (physicalAddress, 0, SEARCH_PHYSICAL_ADDRESS, + requestedCoherency); + + if (map != NULL) + { + return map->virtualAddress + physicalAddress - map->physicalAddress; + } + else + { + return (UINT32) IX_OSAL_MMU_PHYS_TO_VIRT (physicalAddress); + } +} |
