Skeletons for remaining paging files to be implemented
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2863 42af7a65-404d-4744-a932-0658087f49c3
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patacongo
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9567e48c57
commit
c2846c8384
@ -44,6 +44,9 @@ CSRCS = up_boot.c up_buttons.c up_clkinit.c up_leds.c up_mem.c up_spi.c
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ifeq ($(CONFIG_EXAMPLES_NSH_ARCHINIT),y)
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CSRCS += up_nsh.c
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endif
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ifeq ($(CONFIG_PAGING),y)
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CSRCS += up_fillpage.c
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endif
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ifeq ($(CONFIG_EXAMPLE),usbstorage)
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CSRCS += up_usbstrg.c
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endif
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125
configs/ea3131/src/up_fillpage.c
Executable file
125
configs/ea3131/src/up_fillpage.c
Executable file
@ -0,0 +1,125 @@
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/****************************************************************************
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* configs/ea3131/src/up_fillpage.c
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* arch/arm/src/board/up_fillpage.c
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*
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* Copyright (C) 2010 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <debug.h>
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#include <arch/nuttx/sched.h>
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#include <arch/nuttx/page.h>
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#ifdef CONFIG_PAGING
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/****************************************************************************
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* Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: up_fillpage()
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*
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* Description:
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* After a page is allocated and mapped by up_allocpage(), the actual
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* filling of the page with data from the non-volatile, must be performed
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* by a separate call to the architecture-specific function, up_fillpage().
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* This function is non-blocking, it will start an asynchronous page fill.
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* The common paging logic will provide a callback function, pg_callback,
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* that will be called when the page fill is finished (or an error occurs).
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* This callback is assumed to occur from an interrupt level when the
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* device driver completes the fill operation.
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*
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* NOTE: Allocating and filling a page is a two step process. up_allocpage()
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* allocates the page, and up_fillpage() fills it with data from some non-
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* volatile storage device. This distinction is made because up_allocpage()
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* can probably be implemented in board-independent logic whereas up_fillpage()
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* probably must be implemented as board-specific logic.
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*
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* Input Parameters:
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* tcb - A reference to the task control block of the task that needs to
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* have a page fill. Architecture-specific logic can retrieve page
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* fault information from the architecture-specific context
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* information in this TCB to perform the fill.
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* pg_callbck - The function to be called when the page fill is complete.
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*
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* Returned Value:
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* This function will return zero (OK) if the page fill was successfully
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* started (the result of the page fill is passed to the callback function
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* as the result argument). A negated errno value may be returned if an
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* error occurs. All errors, however, are fatal.
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*
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* NOTE: -EBUSY has a special meaning. It is used internally to mean that
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* the callback function has not executed. Therefore, -EBUSY should
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* never be provided in the result argument of pg_callback.
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*
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* Assumptions:
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* - This function is called from the normal tasking context (but
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* interrupts siabled). The implementation must take whatever actions
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* are necessary to assure that the operation is safe within this context.
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* - Upon return, the caller will sleep waiting for the page fill callback
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* to occur. The callback function will perform the wakeup.
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*
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****************************************************************************/
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#ifdef CONFIG_PAGING_BLOCKINGFILL
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int up_fillpage(FAR _TCB *tcb, FAR void *vpage)
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{
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# warning "Not implemented"
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return -ENOSYS;
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}
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#else
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int up_fillpage(FAR _TCB *tcb, FAR void *vpage, up_pgcallback_t pg_callback)
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{
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# warning "Not implemented"
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return -ENOSYS;
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}
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#endif
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#endif /* CONFIG_PAGING */
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