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8b5989f333
Add set_ptes(), update_mmu_cache_range(), flush_dcache_folio() and flush_icache_pages(). Change the PG_dcache_clear flag from being per-page to per-folio which makes __dma_page_dev_to_cpu() a bit more exciting. Also add flush_cache_pages(), even though this isn't used by generic code (yet?) [m.szyprowski@samsung.com: fix potential endless loop in __dma_page_dev_to_cpu()] Link: https://lkml.kernel.org/r/20230809172737.3574190-1-m.szyprowski@samsung.com [willy@infradead.org: fix folio conversion in __dma_page_dev_to_cpu()] Link: https://lkml.kernel.org/r/20230823191852.1556561-1-willy@infradead.org Link: https://lkml.kernel.org/r/20230802151406.3735276-10-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Acked-by: Mike Rapoport (IBM) <rppt@kernel.org> Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
97 lines
2.3 KiB
C
97 lines
2.3 KiB
C
/* 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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void __flush_dcache_folio(struct address_space *mapping, struct folio *folio);
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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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#ifdef CONFIG_CMA_AREAS
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void dma_contiguous_remap(void);
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#else
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static inline void dma_contiguous_remap(void) { }
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#endif
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unsigned long __clear_cr(unsigned long mask);
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