/* SPDX-License-Identifier: GPL-2.0 */
|
#ifdef CONFIG_MMU
|
#include <linux/list.h>
|
#include <linux/vmalloc.h>
|
#include <linux/pgtable.h>
|
|
/* the upper-most page table pointer */
|
extern pmd_t *top_pmd;
|
|
extern int icache_size;
|
|
/*
|
* 0xffff8000 to 0xffffffff is reserved for any ARM architecture
|
* specific hacks for copying pages efficiently, while 0xffff4000
|
* is reserved for VIPT aliasing flushing by generic code.
|
*
|
* Note that we don't allow VIPT aliasing caches with SMP.
|
*/
|
#define COPYPAGE_MINICACHE 0xffff8000
|
#define COPYPAGE_V6_FROM 0xffff8000
|
#define COPYPAGE_V6_TO 0xffffc000
|
/* PFN alias flushing, for VIPT caches */
|
#define FLUSH_ALIAS_START 0xffff4000
|
|
static inline void set_top_pte(unsigned long va, pte_t pte)
|
{
|
pte_t *ptep = pte_offset_kernel(top_pmd, va);
|
set_pte_ext(ptep, pte, 0);
|
local_flush_tlb_kernel_page(va);
|
}
|
|
static inline pte_t get_top_pte(unsigned long va)
|
{
|
pte_t *ptep = pte_offset_kernel(top_pmd, va);
|
return *ptep;
|
}
|
|
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);
|
|
extern void __flush_dcache_page(struct address_space *mapping, struct page *page);
|
|
/*
|
* 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);
|
void dma_contiguous_remap(void);
|
|
unsigned long __clear_cr(unsigned long mask);
|
