From c2846c83847fd6217f4f2b791ddbf04c21e35aa7 Mon Sep 17 00:00:00 2001 From: patacongo Date: Tue, 17 Aug 2010 19:28:51 +0000 Subject: [PATCH] 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 --- configs/ea3131/src/Makefile | 3 + configs/ea3131/src/up_fillpage.c | 125 +++++++++++++++++++++++++++++++ 2 files changed, 128 insertions(+) create mode 100755 configs/ea3131/src/up_fillpage.c diff --git a/configs/ea3131/src/Makefile b/configs/ea3131/src/Makefile index 264b6902f7..07443cc87c 100755 --- a/configs/ea3131/src/Makefile +++ b/configs/ea3131/src/Makefile @@ -44,6 +44,9 @@ CSRCS = up_boot.c up_buttons.c up_clkinit.c up_leds.c up_mem.c up_spi.c ifeq ($(CONFIG_EXAMPLES_NSH_ARCHINIT),y) CSRCS += up_nsh.c endif +ifeq ($(CONFIG_PAGING),y) +CSRCS += up_fillpage.c +endif ifeq ($(CONFIG_EXAMPLE),usbstorage) CSRCS += up_usbstrg.c endif diff --git a/configs/ea3131/src/up_fillpage.c b/configs/ea3131/src/up_fillpage.c new file mode 100755 index 0000000000..f72b88ec95 --- /dev/null +++ b/configs/ea3131/src/up_fillpage.c @@ -0,0 +1,125 @@ +/**************************************************************************** + * configs/ea3131/src/up_fillpage.c + * arch/arm/src/board/up_fillpage.c + * + * Copyright (C) 2010 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * 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 NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * 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. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include + +#include + +#include +#include + +#ifdef CONFIG_PAGING + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + + /**************************************************************************** + * Name: up_fillpage() + * + * Description: + * After a page is allocated and mapped by up_allocpage(), the actual + * filling of the page with data from the non-volatile, must be performed + * by a separate call to the architecture-specific function, up_fillpage(). + * This function is non-blocking, it will start an asynchronous page fill. + * The common paging logic will provide a callback function, pg_callback, + * that will be called when the page fill is finished (or an error occurs). + * This callback is assumed to occur from an interrupt level when the + * device driver completes the fill operation. + * + * NOTE: Allocating and filling a page is a two step process. up_allocpage() + * allocates the page, and up_fillpage() fills it with data from some non- + * volatile storage device. This distinction is made because up_allocpage() + * can probably be implemented in board-independent logic whereas up_fillpage() + * probably must be implemented as board-specific logic. + * + * Input Parameters: + * tcb - A reference to the task control block of the task that needs to + * have a page fill. Architecture-specific logic can retrieve page + * fault information from the architecture-specific context + * information in this TCB to perform the fill. + * pg_callbck - The function to be called when the page fill is complete. + * + * Returned Value: + * This function will return zero (OK) if the page fill was successfully + * started (the result of the page fill is passed to the callback function + * as the result argument). A negated errno value may be returned if an + * error occurs. All errors, however, are fatal. + * + * NOTE: -EBUSY has a special meaning. It is used internally to mean that + * the callback function has not executed. Therefore, -EBUSY should + * never be provided in the result argument of pg_callback. + * + * Assumptions: + * - This function is called from the normal tasking context (but + * interrupts siabled). The implementation must take whatever actions + * are necessary to assure that the operation is safe within this context. + * - Upon return, the caller will sleep waiting for the page fill callback + * to occur. The callback function will perform the wakeup. + * + ****************************************************************************/ + +#ifdef CONFIG_PAGING_BLOCKINGFILL +int up_fillpage(FAR _TCB *tcb, FAR void *vpage) +{ +# warning "Not implemented" + return -ENOSYS; +} +#else +int up_fillpage(FAR _TCB *tcb, FAR void *vpage, up_pgcallback_t pg_callback) +{ +# warning "Not implemented" + return -ENOSYS; +} +#endif + +#endif /* CONFIG_PAGING */