/* * MTD primitives for XIP support * * Author: Nicolas Pitre * Created: Nov 2, 2004 * Copyright: (C) 2004 MontaVista Software, Inc. * * This XIP support for MTD has been loosely inspired * by an earlier patch authored by David Woodhouse. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #ifndef __LINUX_MTD_XIP_H__ #define __LINUX_MTD_XIP_H__ #ifdef CONFIG_MTD_XIP /* * We really don't want gcc to guess anything. * We absolutely _need_ proper inlining. */ #include <linux/compiler.h> /* * Function that are modifying the flash state away from array mode must * obviously not be running from flash. The __xipram is therefore marking * those functions so they get relocated to ram. */ #ifdef CONFIG_XIP_KERNEL #define __xipram noinline __attribute__ ((__section__ (".xiptext"))) #endif /* * Each architecture has to provide the following macros. They must access * the hardware directly and not rely on any other (XIP) functions since they * won't be available when used (flash not in array mode). * * xip_irqpending() * * return non zero when any hardware interrupt is pending. * * xip_currtime() * * return a platform specific time reference to be used with * xip_elapsed_since(). * * xip_elapsed_since(x) * * return in usecs the elapsed timebetween now and the reference x as * returned by xip_currtime(). * * note 1: conversion to usec can be approximated, as long as the * returned value is <= the real elapsed time. * note 2: this should be able to cope with a few seconds without * overflowing. * * xip_iprefetch() * * Macro to fill instruction prefetch * e.g. a series of nops: asm volatile (".rep 8; nop; .endr"); */ #include <asm/mtd-xip.h> #ifndef xip_irqpending #warning "missing IRQ and timer primitives for XIP MTD support" #warning "some of the XIP MTD support code will be disabled" #warning "your system will therefore be unresponsive when writing or erasing flash" #define xip_irqpending() (0) #define xip_currtime() (0) #define xip_elapsed_since(x) (0) #endif #ifndef xip_iprefetch #define xip_iprefetch() do { } while (0) #endif /* * xip_cpu_idle() is used when waiting for a delay equal or larger than * the system timer tick period. This should put the CPU into idle mode * to save power and to be woken up only when some interrupts are pending. * This should not rely upon standard kernel code. */ #ifndef xip_cpu_idle #define xip_cpu_idle() do { } while (0) #endif #endif /* CONFIG_MTD_XIP */ #ifndef __xipram #define __xipram #endif #endif /* __LINUX_MTD_XIP_H__ */
Name | Type | Size | Permission | Actions |
---|---|---|---|---|
bbm.h | File | 5.84 KB | 0644 |
|
blktrans.h | File | 2.81 KB | 0644 |
|
cfi.h | File | 10.31 KB | 0644 |
|
cfi_endian.h | File | 2.13 KB | 0644 |
|
concat.h | File | 1.14 KB | 0644 |
|
doc2000.h | File | 6.03 KB | 0644 |
|
flashchip.h | File | 3.08 KB | 0644 |
|
ftl.h | File | 2.49 KB | 0644 |
|
gen_probe.h | File | 1.26 KB | 0644 |
|
inftl.h | File | 1.56 KB | 0644 |
|
latch-addr-flash.h | File | 716 B | 0644 |
|
lpc32xx_mlc.h | File | 531 B | 0644 |
|
lpc32xx_slc.h | File | 531 B | 0644 |
|
map.h | File | 13.37 KB | 0644 |
|
mtd.h | File | 19.05 KB | 0644 |
|
mtdram.h | File | 257 B | 0644 |
|
nand-gpio.h | File | 330 B | 0644 |
|
nand_bch.h | File | 1.56 KB | 0644 |
|
nand_ecc.h | File | 1.14 KB | 0644 |
|
ndfc.h | File | 2.2 KB | 0644 |
|
nftl.h | File | 2.35 KB | 0644 |
|
onenand.h | File | 7.87 KB | 0644 |
|
onenand_regs.h | File | 7.15 KB | 0644 |
|
partitions.h | File | 3.75 KB | 0644 |
|
pfow.h | File | 5.56 KB | 0644 |
|
physmap.h | File | 1 KB | 0644 |
|
pismo.h | File | 440 B | 0644 |
|
plat-ram.h | File | 817 B | 0644 |
|
qinfo.h | File | 2.47 KB | 0644 |
|
rawnand.h | File | 41.17 KB | 0644 |
|
sh_flctl.h | File | 6.41 KB | 0644 |
|
sharpsl.h | File | 587 B | 0644 |
|
spear_smi.h | File | 1.67 KB | 0644 |
|
spi-nor.h | File | 14.28 KB | 0644 |
|
super.h | File | 835 B | 0644 |
|
ubi.h | File | 10.33 KB | 0644 |
|
xip.h | File | 2.66 KB | 0644 |
|