arch/loongarch/include/asm/fixmap.h

Source file repositories/reference/linux-study-clean/arch/loongarch/include/asm/fixmap.h

File Facts

System
Linux kernel
Corpus path
arch/loongarch/include/asm/fixmap.h
Extension
.h
Size
927 bytes
Lines
43
Domain
Architecture Layer
Bucket
arch/loongarch
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef _ASM_FIXMAP_H
#define _ASM_FIXMAP_H

#ifdef CONFIG_HIGHMEM
#include <linux/threads.h>
#include <asm/kmap_size.h>
#endif

#define NR_FIX_BTMAPS 64

enum fixed_addresses {
	FIX_HOLE,
#ifdef CONFIG_HIGHMEM
	FIX_KMAP_BEGIN,
	FIX_KMAP_END = FIX_KMAP_BEGIN + (KM_MAX_IDX * NR_CPUS) - 1,
#endif
	FIX_EARLYCON_MEM_BASE,
	__end_of_fixed_addresses
};

#define FIXADDR_SIZE	(__end_of_fixed_addresses << PAGE_SHIFT)
#define FIXADDR_START	(FIXADDR_TOP - FIXADDR_SIZE)
#define FIXMAP_PAGE_IO	PAGE_KERNEL_SUC

extern void __set_fixmap(enum fixed_addresses idx,
			 phys_addr_t phys, pgprot_t flags);

#include <asm-generic/fixmap.h>

/*
 * Called from pagetable_init()
 */
extern void fixrange_init(unsigned long start, unsigned long end, pgd_t *pgd_base);

#endif

Annotation

Implementation Notes