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93 lines
2.3 KiB
93 lines
2.3 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifdef CONFIG_MMU |
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#include <linux/list.h> |
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#include <linux/vmalloc.h> |
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#include <linux/pgtable.h> |
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/* the upper-most page table pointer */ |
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extern pmd_t *top_pmd; |
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extern int icache_size; |
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/* |
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* 0xffff8000 to 0xffffffff is reserved for any ARM architecture |
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* specific hacks for copying pages efficiently, while 0xffff4000 |
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* is reserved for VIPT aliasing flushing by generic code. |
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* |
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* Note that we don't allow VIPT aliasing caches with SMP. |
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*/ |
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#define COPYPAGE_MINICACHE 0xffff8000 |
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#define COPYPAGE_V6_FROM 0xffff8000 |
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#define COPYPAGE_V6_TO 0xffffc000 |
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/* PFN alias flushing, for VIPT caches */ |
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#define FLUSH_ALIAS_START 0xffff4000 |
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static inline void set_top_pte(unsigned long va, pte_t pte) |
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{ |
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pte_t *ptep = pte_offset_kernel(top_pmd, va); |
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set_pte_ext(ptep, pte, 0); |
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local_flush_tlb_kernel_page(va); |
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} |
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static inline pte_t get_top_pte(unsigned long va) |
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{ |
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pte_t *ptep = pte_offset_kernel(top_pmd, va); |
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return *ptep; |
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} |
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struct mem_type { |
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pteval_t prot_pte; |
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pteval_t prot_pte_s2; |
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pmdval_t prot_l1; |
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pmdval_t prot_sect; |
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unsigned int domain; |
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}; |
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const struct mem_type *get_mem_type(unsigned int type); |
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extern void __flush_dcache_page(struct address_space *mapping, struct page *page); |
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/* |
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* ARM specific vm_struct->flags bits. |
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*/ |
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/* (super)section-mapped I/O regions used by ioremap()/iounmap() */ |
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#define VM_ARM_SECTION_MAPPING 0x80000000 |
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/* permanent static mappings from iotable_init() */ |
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#define VM_ARM_STATIC_MAPPING 0x40000000 |
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/* empty mapping */ |
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#define VM_ARM_EMPTY_MAPPING 0x20000000 |
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/* mapping type (attributes) for permanent static mappings */ |
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#define VM_ARM_MTYPE(mt) ((mt) << 20) |
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#define VM_ARM_MTYPE_MASK (0x1f << 20) |
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struct static_vm { |
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struct vm_struct vm; |
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struct list_head list; |
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}; |
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extern struct list_head static_vmlist; |
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extern struct static_vm *find_static_vm_vaddr(void *vaddr); |
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extern __init void add_static_vm_early(struct static_vm *svm); |
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#endif |
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#ifdef CONFIG_ZONE_DMA |
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extern phys_addr_t arm_dma_limit; |
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extern unsigned long arm_dma_pfn_limit; |
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#else |
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#define arm_dma_limit ((phys_addr_t)~0) |
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#define arm_dma_pfn_limit (~0ul >> PAGE_SHIFT) |
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#endif |
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extern phys_addr_t arm_lowmem_limit; |
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void __init bootmem_init(void); |
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void arm_mm_memblock_reserve(void); |
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void dma_contiguous_remap(void); |
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unsigned long __clear_cr(unsigned long mask);
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