arch/arm/mm/mm.h

Source file repositories/reference/linux-study-clean/arch/arm/mm/mm.h

File Facts

System
Linux kernel
Corpus path
arch/arm/mm/mm.h
Extension
.h
Size
2394 bytes
Lines
98
Domain
Architecture Layer
Bucket
arch/arm
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

struct mem_type {
	pteval_t prot_pte;
	pteval_t prot_pte_s2;
	pmdval_t prot_l1;
	pmdval_t prot_sect;
	unsigned int domain;
};

const struct mem_type *get_mem_type(unsigned int type);

void __flush_dcache_folio(struct address_space *mapping, struct folio *folio);

/*
 * ARM specific vm_struct->flags bits.
 */

/* (super)section-mapped I/O regions used by ioremap()/iounmap() */
#define VM_ARM_SECTION_MAPPING	0x80000000

/* permanent static mappings from iotable_init() */
#define VM_ARM_STATIC_MAPPING	0x40000000

/* empty mapping */
#define VM_ARM_EMPTY_MAPPING	0x20000000

/* mapping type (attributes) for permanent static mappings */
#define VM_ARM_MTYPE(mt)		((mt) << 20)
#define VM_ARM_MTYPE_MASK	(0x1f << 20)


struct static_vm {
	struct vm_struct vm;
	struct list_head list;
};

extern struct list_head static_vmlist;
extern struct static_vm *find_static_vm_vaddr(void *vaddr);
extern __init void add_static_vm_early(struct static_vm *svm);

#endif

#ifdef CONFIG_ZONE_DMA
extern phys_addr_t arm_dma_limit;
extern unsigned long arm_dma_pfn_limit;
#else
#define arm_dma_limit ((phys_addr_t)~0)
#define arm_dma_pfn_limit (~0ul >> PAGE_SHIFT)
#endif

extern phys_addr_t arm_lowmem_limit;

void __init bootmem_init(void);
void arm_mm_memblock_reserve(void);
#ifdef CONFIG_CMA_AREAS
void dma_contiguous_remap(void);
#else
static inline void dma_contiguous_remap(void) { }
#endif

unsigned long __clear_cr(unsigned long mask);

Annotation

Implementation Notes