/* SPDX-License-Identifier: GPL-2.0 *//* * fixmap.h: compile-time virtual memory allocation * * Copyright (C) 1998 Ingo Molnar * * Copyright 2008 Freescale Semiconductor Inc. *   Port to powerpc added by Kumar Gala * * Copyright 2011 Michal Simek <monstr@monstr.eu> * Copyright 2011 PetaLogix Qld Pty Ltd *   Port to Microblaze */ #ifndef _ASM_FIXMAP_H#define _ASM_FIXMAP_H #ifndef __ASSEMBLER__#include <linux/kernel.h>#include <asm/page.h>#ifdef CONFIG_HIGHMEM#include <linux/threads.h>#include <asm/kmap_size.h>#endif #define FIXADDR_TOP	((unsigned long)(-PAGE_SIZE)) /* * Here we define all the compile-time 'special' virtual * addresses. The point is to have a constant address at * compile time, but to set the physical address only * in the boot process. We allocate these special addresses * from the end of virtual memory (0xfffff000) backwards. * Also this lets us do fail-safe vmalloc(), we * can guarantee that these special addresses and * vmalloc()-ed addresses never overlap. * * these 'compile-time allocated' memory buffers are * fixed-size 4k pages. (or larger if used with an increment * highger than 1) use fixmap_set(idx,phys) to associate * physical memory with fixmap indices. * * TLB entries of such buffers will not be flushed across * task switches. */enum fixed_addresses {	FIX_HOLE,#ifdef CONFIG_HIGHMEM	FIX_KMAP_BEGIN,	/* reserved pte's for temporary kernel mappings */	FIX_KMAP_END = FIX_KMAP_BEGIN + (KM_MAX_IDX * num_possible_cpus()) - 1,#endif	__end_of_fixed_addresses}; extern void __set_fixmap(enum fixed_addresses idx,					phys_addr_t phys, pgprot_t flags); #define __FIXADDR_SIZE	(__end_of_fixed_addresses << PAGE_SHIFT)#define FIXADDR_START		(FIXADDR_TOP - __FIXADDR_SIZE) #define FIXMAP_PAGE_NOCACHE PAGE_KERNEL_CI #include <asm-generic/fixmap.h> #endif /* !__ASSEMBLER__ */#endif