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/usr/src/linux-headers-5.15.0-181/include/linux/mtd/

/usr/src/linux-headers-5.15.0-181/include/linux/mtd

Name	Size	Mode	Actions
bbm.h	4825	0644	edit dl rm
blktrans.h	2682	0644	edit dl rm
cfi.h	10144	0644	edit dl rm
cfi_endian.h	1514	0644	edit dl rm
concat.h	493	0644	edit dl rm
doc2000.h	5505	0644	edit dl rm
flashchip.h	2478	0644	edit dl rm
ftl.h	2551	0644	edit dl rm
gen_probe.h	615	0644	edit dl rm
hyperbus.h	2893	0644	edit dl rm
inftl.h	1599	0644	edit dl rm
jedec.h	1905	0644	edit dl rm
latch-addr-flash.h	716	0644	edit dl rm
lpc32xx_mlc.h	385	0644	edit dl rm
lpc32xx_slc.h	385	0644	edit dl rm
map.h	13016	0644	edit dl rm
mtd.h	22569	0644	edit dl rm
mtdram.h	257	0644	edit dl rm
nand-ecc-sw-bch.h	2117	0644	edit dl rm
nand-ecc-sw-hamming.h	2717	0644	edit dl rm
nand-gpio.h	330	0644	edit dl rm
nand.h	30284	0644	edit dl rm
ndfc.h	2070	0644	edit dl rm
nftl.h	1734	0644	edit dl rm
onenand.h	7974	0644	edit dl rm
onenand_regs.h	7217	0644	edit dl rm
onfi.h	4962	0644	edit dl rm
partitions.h	3946	0644	edit dl rm
pfow.h	4489	0644	edit dl rm
physmap.h	808	0644	edit dl rm
pismo.h	271	0644	edit dl rm
plat-ram.h	668	0644	edit dl rm
platnand.h	2545	0644	edit dl rm
qinfo.h	2530	0644	edit dl rm
rawnand.h	52400	0644	edit dl rm
sharpsl.h	485	0644	edit dl rm
sh_flctl.h	5927	0644	edit dl rm
spear_smi.h	1714	0644	edit dl rm
spi-nor.h	17247	0644	edit dl rm
spinand.h	16220	0644	edit dl rm
super.h	578	0644	edit dl rm
ubi.h	9914	0644	edit dl rm
xip.h	2556	0644	edit dl rm

Edit: /usr/src/linux-headers-5.15.0-181/include/linux/mtd/xip.h (2556B)

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * 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.
 */

#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 __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__ */

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