mirror of
https://github.com/raspberrypi/linux.git
synced 2025-12-23 02:04:02 +00:00
79caa6c88a
Pull asm-generic updates from Arnd Bergmann:
"These are a number of unrelated cleanups, generally simplifying the
architecture specific header files:
- A series from Al Viro simplifies asm/vga.h, after it turns out that
most of it can be generalized.
- A series from Julian Vetter adds a common version of
memcpy_{to,from}io() and memset_io() and changes most architectures
to use that instead of their own implementation
- A series from Niklas Schnelle concludes his work to make PC style
inb()/outb() optional
- Nicolas Pitre contributes improvements for the generic do_div()
helper
- Christoph Hellwig adds a generic version of page_to_phys() and
phys_to_page(), replacing the slightly different architecture
specific definitions.
- Uwe Kleine-Koenig has a minor cleanup for ioctl definitions"
* tag 'asm-generic-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: (24 commits)
empty include/asm-generic/vga.h
sparc: get rid of asm/vga.h
asm/vga.h: don't bother with scr_mem{cpy,move}v() unless we need to
vt_buffer.h: get rid of dead code in default scr_...() instances
tty: serial: export serial_8250_warn_need_ioport
lib/iomem_copy: fix kerneldoc format style
hexagon: simplify asm/io.h for !HAS_IOPORT
loongarch: Use new fallback IO memcpy/memset
csky: Use new fallback IO memcpy/memset
arm64: Use new fallback IO memcpy/memset
New implementation for IO memcpy and IO memset
watchdog: Add HAS_IOPORT dependency for SBC8360 and SBC7240
__arch_xprod64(): make __always_inline when optimizing for performance
ARM: div64: improve __arch_xprod_64()
asm-generic/div64: optimize/simplify __div64_const32()
lib/math/test_div64: add some edge cases relevant to __div64_const32()
asm-generic: add an optional pfn_valid check to page_to_phys
asm-generic: provide generic page_to_phys and phys_to_page implementations
asm-generic/io.h: Remove I/O port accessors for HAS_IOPORT=n
tty: serial: handle HAS_IOPORT dependencies
...
143 lines
3.7 KiB
C
143 lines
3.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* VM ops
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*
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* Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
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* Copyright (C) 2008-2009 PetaLogix
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* Copyright (C) 2006 Atmark Techno, Inc.
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* Changes for MMU support:
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* Copyright (C) 2007 Xilinx, Inc. All rights reserved.
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*/
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#ifndef _ASM_MICROBLAZE_PAGE_H
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#define _ASM_MICROBLAZE_PAGE_H
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#include <linux/pfn.h>
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#include <asm/setup.h>
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#include <asm/asm-compat.h>
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#include <linux/const.h>
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#ifdef __KERNEL__
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#include <vdso/page.h>
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#define LOAD_OFFSET ASM_CONST((CONFIG_KERNEL_START-CONFIG_KERNEL_BASE_ADDR))
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#define PTE_SHIFT (PAGE_SHIFT - 2) /* 1024 ptes per page */
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#ifndef __ASSEMBLY__
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/*
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* PAGE_OFFSET -- the first address of the first page of memory. With MMU
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* it is set to the kernel start address (aligned on a page boundary).
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*
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* CONFIG_KERNEL_START is defined in arch/microblaze/config.in and used
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* in arch/microblaze/Makefile.
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*/
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#define PAGE_OFFSET CONFIG_KERNEL_START
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/*
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* The basic type of a PTE - 32 bit physical addressing.
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*/
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typedef unsigned long pte_basic_t;
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#define PTE_FMT "%.8lx"
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# define copy_page(to, from) memcpy((to), (from), PAGE_SIZE)
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# define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE)
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# define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE)
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# define copy_user_page(vto, vfrom, vaddr, topg) \
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memcpy((vto), (vfrom), PAGE_SIZE)
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/*
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* These are used to make use of C type-checking..
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*/
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typedef struct page *pgtable_t;
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typedef struct { unsigned long pte; } pte_t;
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typedef struct { unsigned long pgprot; } pgprot_t;
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/* FIXME this can depend on linux kernel version */
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typedef struct { unsigned long pgd; } pgd_t;
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# define pte_val(x) ((x).pte)
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# define pgprot_val(x) ((x).pgprot)
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# define pgd_val(x) ((x).pgd)
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# define __pte(x) ((pte_t) { (x) })
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# define __pgd(x) ((pgd_t) { (x) })
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# define __pgprot(x) ((pgprot_t) { (x) })
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/**
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* Conversions for virtual address, physical address, pfn, and struct
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* page are defined in the following files.
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*
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* virt -+
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* | asm-microblaze/page.h
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* phys -+
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* | linux/pfn.h
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* pfn -+
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* | asm-generic/memory_model.h
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* page -+
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*
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*/
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extern unsigned long max_low_pfn;
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extern unsigned long min_low_pfn;
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extern unsigned long max_pfn;
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extern unsigned long memory_start;
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extern unsigned long memory_size;
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extern unsigned long lowmem_size;
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extern unsigned long kernel_tlb;
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extern int page_is_ram(unsigned long pfn);
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# define phys_to_pfn(phys) (PFN_DOWN(phys))
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# define pfn_to_phys(pfn) (PFN_PHYS(pfn))
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# define virt_to_page(kaddr) (pfn_to_page(__pa(kaddr) >> PAGE_SHIFT))
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# define page_to_virt(page) __va(page_to_pfn(page) << PAGE_SHIFT)
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# define ARCH_PFN_OFFSET (memory_start >> PAGE_SHIFT)
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# endif /* __ASSEMBLY__ */
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/* Convert between virtual and physical address for MMU. */
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/* Handle MicroBlaze processor with virtual memory. */
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#define __virt_to_phys(addr) \
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((addr) + CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START)
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#define __phys_to_virt(addr) \
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((addr) + CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR)
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#define tophys(rd, rs) \
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addik rd, rs, (CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START)
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#define tovirt(rd, rs) \
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addik rd, rs, (CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR)
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#ifndef __ASSEMBLY__
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# define __pa(x) __virt_to_phys((unsigned long)(x))
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# define __va(x) ((void *)__phys_to_virt((unsigned long)(x)))
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static inline unsigned long virt_to_pfn(const void *vaddr)
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{
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return phys_to_pfn(__pa(vaddr));
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}
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static inline const void *pfn_to_virt(unsigned long pfn)
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{
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return __va(pfn_to_phys((pfn)));
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}
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#define virt_addr_valid(vaddr) (pfn_valid(virt_to_pfn(vaddr)))
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#endif /* __ASSEMBLY__ */
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#define TOPHYS(addr) __virt_to_phys(addr)
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#endif /* __KERNEL__ */
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#include <asm-generic/memory_model.h>
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#include <asm-generic/getorder.h>
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#endif /* _ASM_MICROBLAZE_PAGE_H */
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