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4313a24985
All architecture-independent users of virt_to_bus() and bus_to_virt() have been fixed to use the dma mapping interfaces or have been removed now. This means the definitions on most architectures, and the CONFIG_VIRT_TO_BUS symbol are now obsolete and can be removed. The only exceptions to this are a few network and scsi drivers for m68k Amiga and VME machines and ppc32 Macintosh. These drivers work correctly with the old interfaces and are probably not worth changing. On alpha and parisc, virt_to_bus() were still used in asm/floppy.h. alpha can use isa_virt_to_bus() like x86 does, and parisc can just open-code the virt_to_phys() here, as this is architecture specific code. I tried updating the bus-virt-phys-mapping.rst documentation, which started as an email from Linus to explain some details of the Linux-2.0 driver interfaces. The bits about virt_to_bus() were declared obsolete backin 2000, and the rest is not all that relevant any more, so in the end I just decided to remove the file completely. Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Acked-by: Helge Deller <deller@gmx.de> # parisc Signed-off-by: Arnd Bergmann <arnd@arndb.de>
60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
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* Copyright (C) 2007-2009 PetaLogix
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* Copyright (C) 2006 Atmark Techno, Inc.
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*/
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#ifndef _ASM_MICROBLAZE_IO_H
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#define _ASM_MICROBLAZE_IO_H
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#include <asm/byteorder.h>
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#include <asm/page.h>
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#include <linux/types.h>
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#include <linux/mm.h> /* Get struct page {...} */
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#ifndef CONFIG_PCI
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#define _IO_BASE 0
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#define _ISA_MEM_BASE 0
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#else
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#define _IO_BASE isa_io_base
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#define _ISA_MEM_BASE isa_mem_base
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struct pci_dev;
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extern void pci_iounmap(struct pci_dev *dev, void __iomem *);
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#define pci_iounmap pci_iounmap
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extern unsigned long isa_io_base;
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extern resource_size_t isa_mem_base;
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#endif
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#define PCI_IOBASE ((void __iomem *)_IO_BASE)
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#define IO_SPACE_LIMIT (0xFFFFFFFF)
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extern void iounmap(volatile void __iomem *addr);
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extern void __iomem *ioremap(phys_addr_t address, unsigned long size);
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/* Big Endian */
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#define out_be32(a, v) __raw_writel((v), (void __iomem __force *)(a))
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#define out_be16(a, v) __raw_writew((v), (a))
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#define in_be32(a) __raw_readl((const void __iomem __force *)(a))
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#define in_be16(a) __raw_readw(a)
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#define writel_be(v, a) out_be32((__force unsigned *)a, v)
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#define readl_be(a) in_be32((__force unsigned *)a)
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/* Little endian */
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#define out_le32(a, v) __raw_writel(__cpu_to_le32(v), (a))
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#define out_le16(a, v) __raw_writew(__cpu_to_le16(v), (a))
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#define in_le32(a) __le32_to_cpu(__raw_readl(a))
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#define in_le16(a) __le16_to_cpu(__raw_readw(a))
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/* Byte ops */
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#define out_8(a, v) __raw_writeb((v), (a))
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#define in_8(a) __raw_readb(a)
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#include <asm-generic/io.h>
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#endif /* _ASM_MICROBLAZE_IO_H */
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