14726dd60SMichal Simek /* SPDX-License-Identifier: GPL-2.0 */
24b87d7a4SMichal Simek /*
31f84e1eaSMichal Simek * VM ops
41f84e1eaSMichal Simek *
51f84e1eaSMichal Simek * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
61f84e1eaSMichal Simek * Copyright (C) 2008-2009 PetaLogix
74b87d7a4SMichal Simek * Copyright (C) 2006 Atmark Techno, Inc.
84b87d7a4SMichal Simek * Changes for MMU support:
94b87d7a4SMichal Simek * Copyright (C) 2007 Xilinx, Inc. All rights reserved.
104b87d7a4SMichal Simek */
114b87d7a4SMichal Simek
124b87d7a4SMichal Simek #ifndef _ASM_MICROBLAZE_PAGE_H
134b87d7a4SMichal Simek #define _ASM_MICROBLAZE_PAGE_H
144b87d7a4SMichal Simek
154b87d7a4SMichal Simek #include <linux/pfn.h>
164b87d7a4SMichal Simek #include <asm/setup.h>
17a1253977SJohn Williams #include <asm/asm-compat.h>
181f84e1eaSMichal Simek #include <linux/const.h>
191f84e1eaSMichal Simek
201f84e1eaSMichal Simek #ifdef __KERNEL__
214b87d7a4SMichal Simek
224b87d7a4SMichal Simek /* PAGE_SHIFT determines the page size */
23ba9c4f88SSteven J. Magnani #define PAGE_SHIFT 12
24ba9c4f88SSteven J. Magnani #define PAGE_SIZE (ASM_CONST(1) << PAGE_SHIFT)
254b87d7a4SMichal Simek #define PAGE_MASK (~(PAGE_SIZE-1))
264b87d7a4SMichal Simek
27a1253977SJohn Williams #define LOAD_OFFSET ASM_CONST((CONFIG_KERNEL_START-CONFIG_KERNEL_BASE_ADDR))
28a1253977SJohn Williams
299f78d3b5SMichal Simek #define PTE_SHIFT (PAGE_SHIFT - 2) /* 1024 ptes per page */
309f78d3b5SMichal Simek
314b87d7a4SMichal Simek #ifndef __ASSEMBLY__
324b87d7a4SMichal Simek
331f84e1eaSMichal Simek /*
341f84e1eaSMichal Simek * PAGE_OFFSET -- the first address of the first page of memory. With MMU
351f84e1eaSMichal Simek * it is set to the kernel start address (aligned on a page boundary).
361f84e1eaSMichal Simek *
371f84e1eaSMichal Simek * CONFIG_KERNEL_START is defined in arch/microblaze/config.in and used
381f84e1eaSMichal Simek * in arch/microblaze/Makefile.
391f84e1eaSMichal Simek */
401f84e1eaSMichal Simek #define PAGE_OFFSET CONFIG_KERNEL_START
411f84e1eaSMichal Simek
421f84e1eaSMichal Simek /*
431f84e1eaSMichal Simek * The basic type of a PTE - 32 bit physical addressing.
441f84e1eaSMichal Simek */
451f84e1eaSMichal Simek typedef unsigned long pte_basic_t;
461f84e1eaSMichal Simek #define PTE_FMT "%.8lx"
471f84e1eaSMichal Simek
4843f2a6e8SMichal Simek # define copy_page(to, from) memcpy((to), (from), PAGE_SIZE)
494b87d7a4SMichal Simek # define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE)
504b87d7a4SMichal Simek
514b87d7a4SMichal Simek # define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE)
524b87d7a4SMichal Simek # define copy_user_page(vto, vfrom, vaddr, topg) \
534b87d7a4SMichal Simek memcpy((vto), (vfrom), PAGE_SIZE)
544b87d7a4SMichal Simek
554b87d7a4SMichal Simek /*
564b87d7a4SMichal Simek * These are used to make use of C type-checking..
574b87d7a4SMichal Simek */
584b87d7a4SMichal Simek typedef struct page *pgtable_t;
594b87d7a4SMichal Simek typedef struct { unsigned long pte; } pte_t;
604b87d7a4SMichal Simek typedef struct { unsigned long pgprot; } pgprot_t;
611f84e1eaSMichal Simek /* FIXME this can depend on linux kernel version */
621f84e1eaSMichal Simek typedef struct { unsigned long pgd; } pgd_t;
634b87d7a4SMichal Simek
644b87d7a4SMichal Simek # define pte_val(x) ((x).pte)
654b87d7a4SMichal Simek # define pgprot_val(x) ((x).pgprot)
661f84e1eaSMichal Simek
671f84e1eaSMichal Simek # define pgd_val(x) ((x).pgd)
684b87d7a4SMichal Simek
694b87d7a4SMichal Simek # define __pte(x) ((pte_t) { (x) })
704b87d7a4SMichal Simek # define __pgd(x) ((pgd_t) { (x) })
714b87d7a4SMichal Simek # define __pgprot(x) ((pgprot_t) { (x) })
724b87d7a4SMichal Simek
734b87d7a4SMichal Simek /**
744b87d7a4SMichal Simek * Conversions for virtual address, physical address, pfn, and struct
754b87d7a4SMichal Simek * page are defined in the following files.
764b87d7a4SMichal Simek *
774b87d7a4SMichal Simek * virt -+
784b87d7a4SMichal Simek * | asm-microblaze/page.h
794b87d7a4SMichal Simek * phys -+
804b87d7a4SMichal Simek * | linux/pfn.h
814b87d7a4SMichal Simek * pfn -+
824b87d7a4SMichal Simek * | asm-generic/memory_model.h
834b87d7a4SMichal Simek * page -+
844b87d7a4SMichal Simek *
854b87d7a4SMichal Simek */
864b87d7a4SMichal Simek
874b87d7a4SMichal Simek extern unsigned long max_low_pfn;
884b87d7a4SMichal Simek extern unsigned long min_low_pfn;
894b87d7a4SMichal Simek extern unsigned long max_pfn;
904b87d7a4SMichal Simek
911f84e1eaSMichal Simek extern unsigned long memory_start;
921f84e1eaSMichal Simek extern unsigned long memory_size;
937c0d2615SMichal Simek extern unsigned long lowmem_size;
941f84e1eaSMichal Simek
950195c002SLinus Torvalds extern unsigned long kernel_tlb;
961f84e1eaSMichal Simek
971f84e1eaSMichal Simek extern int page_is_ram(unsigned long pfn);
984b87d7a4SMichal Simek
994b87d7a4SMichal Simek # define phys_to_pfn(phys) (PFN_DOWN(phys))
1004b87d7a4SMichal Simek # define pfn_to_phys(pfn) (PFN_PHYS(pfn))
1014b87d7a4SMichal Simek
102d79f3b06SMichal Simek # define virt_to_page(kaddr) (pfn_to_page(__pa(kaddr) >> PAGE_SHIFT))
103d79f3b06SMichal Simek # define page_to_virt(page) __va(page_to_pfn(page) << PAGE_SHIFT)
104d79f3b06SMichal Simek # define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
105d79f3b06SMichal Simek
1061f84e1eaSMichal Simek # define ARCH_PFN_OFFSET (memory_start >> PAGE_SHIFT)
1074b87d7a4SMichal Simek # endif /* __ASSEMBLY__ */
1084b87d7a4SMichal Simek
1094b87d7a4SMichal Simek /* Convert between virtual and physical address for MMU. */
1104b87d7a4SMichal Simek /* Handle MicroBlaze processor with virtual memory. */
1111f84e1eaSMichal Simek #define __virt_to_phys(addr) \
1121f84e1eaSMichal Simek ((addr) + CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START)
1131f84e1eaSMichal Simek #define __phys_to_virt(addr) \
1141f84e1eaSMichal Simek ((addr) + CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR)
1151f84e1eaSMichal Simek #define tophys(rd, rs) \
1161f84e1eaSMichal Simek addik rd, rs, (CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START)
1171f84e1eaSMichal Simek #define tovirt(rd, rs) \
1181f84e1eaSMichal Simek addik rd, rs, (CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR)
1194b87d7a4SMichal Simek
120*0d2b4947SLinus Walleij #ifndef __ASSEMBLY__
121*0d2b4947SLinus Walleij
122*0d2b4947SLinus Walleij # define __pa(x) __virt_to_phys((unsigned long)(x))
123*0d2b4947SLinus Walleij # define __va(x) ((void *)__phys_to_virt((unsigned long)(x)))
124*0d2b4947SLinus Walleij
virt_to_pfn(const void * vaddr)125*0d2b4947SLinus Walleij static inline unsigned long virt_to_pfn(const void *vaddr)
126*0d2b4947SLinus Walleij {
127*0d2b4947SLinus Walleij return phys_to_pfn(__pa(vaddr));
128*0d2b4947SLinus Walleij }
129*0d2b4947SLinus Walleij
pfn_to_virt(unsigned long pfn)130*0d2b4947SLinus Walleij static inline const void *pfn_to_virt(unsigned long pfn)
131*0d2b4947SLinus Walleij {
132*0d2b4947SLinus Walleij return __va(pfn_to_phys((pfn)));
133*0d2b4947SLinus Walleij }
134*0d2b4947SLinus Walleij
135*0d2b4947SLinus Walleij #define virt_addr_valid(vaddr) (pfn_valid(virt_to_pfn(vaddr)))
136*0d2b4947SLinus Walleij
137*0d2b4947SLinus Walleij #endif /* __ASSEMBLY__ */
138*0d2b4947SLinus Walleij
1394b87d7a4SMichal Simek #define TOPHYS(addr) __virt_to_phys(addr)
1404b87d7a4SMichal Simek
1414b87d7a4SMichal Simek #endif /* __KERNEL__ */
1424b87d7a4SMichal Simek
1434b87d7a4SMichal Simek #include <asm-generic/memory_model.h>
1445b17e1cdSArnd Bergmann #include <asm-generic/getorder.h>
1454b87d7a4SMichal Simek
1464b87d7a4SMichal Simek #endif /* _ASM_MICROBLAZE_PAGE_H */
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