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>
320 lines
8.1 KiB
C
320 lines
8.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_IO_H
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#define _ASM_IO_H
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#include <linux/types.h>
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#include <linux/pgtable.h>
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#define virt_to_phys(a) ((unsigned long)__pa(a))
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#define phys_to_virt(a) __va(a)
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static inline unsigned long isa_bus_to_virt(unsigned long addr) {
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BUG();
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return 0;
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}
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static inline unsigned long isa_virt_to_bus(void *addr) {
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BUG();
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return 0;
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}
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/*
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* Memory mapped I/O
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*
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* readX()/writeX() do byteswapping and take an ioremapped address
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* __raw_readX()/__raw_writeX() don't byteswap and take an ioremapped address.
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* gsc_*() don't byteswap and operate on physical addresses;
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* eg dev->hpa or 0xfee00000.
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*/
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static inline unsigned char gsc_readb(unsigned long addr)
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{
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long flags;
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unsigned char ret;
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__asm__ __volatile__(
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" rsm %3,%0\n"
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" ldbx 0(%2),%1\n"
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" mtsm %0\n"
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: "=&r" (flags), "=r" (ret) : "r" (addr), "i" (PSW_SM_D) );
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return ret;
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}
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static inline unsigned short gsc_readw(unsigned long addr)
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{
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long flags;
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unsigned short ret;
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__asm__ __volatile__(
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" rsm %3,%0\n"
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" ldhx 0(%2),%1\n"
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" mtsm %0\n"
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: "=&r" (flags), "=r" (ret) : "r" (addr), "i" (PSW_SM_D) );
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return ret;
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}
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static inline unsigned int gsc_readl(unsigned long addr)
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{
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u32 ret;
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__asm__ __volatile__(
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" ldwax 0(%1),%0\n"
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: "=r" (ret) : "r" (addr) );
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return ret;
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}
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static inline unsigned long long gsc_readq(unsigned long addr)
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{
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unsigned long long ret;
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#ifdef CONFIG_64BIT
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__asm__ __volatile__(
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" ldda 0(%1),%0\n"
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: "=r" (ret) : "r" (addr) );
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#else
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/* two reads may have side effects.. */
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ret = ((u64) gsc_readl(addr)) << 32;
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ret |= gsc_readl(addr+4);
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#endif
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return ret;
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}
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static inline void gsc_writeb(unsigned char val, unsigned long addr)
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{
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long flags;
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__asm__ __volatile__(
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" rsm %3,%0\n"
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" stbs %1,0(%2)\n"
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" mtsm %0\n"
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: "=&r" (flags) : "r" (val), "r" (addr), "i" (PSW_SM_D) );
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}
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static inline void gsc_writew(unsigned short val, unsigned long addr)
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{
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long flags;
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__asm__ __volatile__(
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" rsm %3,%0\n"
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" sths %1,0(%2)\n"
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" mtsm %0\n"
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: "=&r" (flags) : "r" (val), "r" (addr), "i" (PSW_SM_D) );
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}
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static inline void gsc_writel(unsigned int val, unsigned long addr)
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{
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__asm__ __volatile__(
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" stwas %0,0(%1)\n"
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: : "r" (val), "r" (addr) );
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}
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static inline void gsc_writeq(unsigned long long val, unsigned long addr)
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{
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#ifdef CONFIG_64BIT
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__asm__ __volatile__(
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" stda %0,0(%1)\n"
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: : "r" (val), "r" (addr) );
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#else
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/* two writes may have side effects.. */
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gsc_writel(val >> 32, addr);
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gsc_writel(val, addr+4);
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#endif
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}
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/*
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* The standard PCI ioremap interfaces
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*/
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void __iomem *ioremap(unsigned long offset, unsigned long size);
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#define ioremap_wc ioremap
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#define ioremap_uc ioremap
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extern void iounmap(const volatile void __iomem *addr);
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static inline unsigned char __raw_readb(const volatile void __iomem *addr)
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{
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return (*(volatile unsigned char __force *) (addr));
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}
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static inline unsigned short __raw_readw(const volatile void __iomem *addr)
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{
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return *(volatile unsigned short __force *) addr;
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}
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static inline unsigned int __raw_readl(const volatile void __iomem *addr)
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{
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return *(volatile unsigned int __force *) addr;
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}
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static inline unsigned long long __raw_readq(const volatile void __iomem *addr)
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{
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return *(volatile unsigned long long __force *) addr;
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}
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static inline void __raw_writeb(unsigned char b, volatile void __iomem *addr)
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{
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*(volatile unsigned char __force *) addr = b;
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}
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static inline void __raw_writew(unsigned short b, volatile void __iomem *addr)
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{
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*(volatile unsigned short __force *) addr = b;
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}
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static inline void __raw_writel(unsigned int b, volatile void __iomem *addr)
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{
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*(volatile unsigned int __force *) addr = b;
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}
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static inline void __raw_writeq(unsigned long long b, volatile void __iomem *addr)
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{
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*(volatile unsigned long long __force *) addr = b;
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}
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static inline unsigned char readb(const volatile void __iomem *addr)
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{
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return __raw_readb(addr);
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}
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static inline unsigned short readw(const volatile void __iomem *addr)
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{
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return le16_to_cpu((__le16 __force) __raw_readw(addr));
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}
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static inline unsigned int readl(const volatile void __iomem *addr)
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{
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return le32_to_cpu((__le32 __force) __raw_readl(addr));
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}
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static inline unsigned long long readq(const volatile void __iomem *addr)
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{
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return le64_to_cpu((__le64 __force) __raw_readq(addr));
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}
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static inline void writeb(unsigned char b, volatile void __iomem *addr)
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{
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__raw_writeb(b, addr);
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}
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static inline void writew(unsigned short w, volatile void __iomem *addr)
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{
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__raw_writew((__u16 __force) cpu_to_le16(w), addr);
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}
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static inline void writel(unsigned int l, volatile void __iomem *addr)
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{
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__raw_writel((__u32 __force) cpu_to_le32(l), addr);
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}
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static inline void writeq(unsigned long long q, volatile void __iomem *addr)
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{
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__raw_writeq((__u64 __force) cpu_to_le64(q), addr);
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}
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#define readb readb
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#define readw readw
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#define readl readl
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#define readq readq
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#define writeb writeb
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#define writew writew
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#define writel writel
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#define writeq writeq
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#define readb_relaxed(addr) readb(addr)
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#define readw_relaxed(addr) readw(addr)
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#define readl_relaxed(addr) readl(addr)
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#define readq_relaxed(addr) readq(addr)
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#define writeb_relaxed(b, addr) writeb(b, addr)
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#define writew_relaxed(w, addr) writew(w, addr)
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#define writel_relaxed(l, addr) writel(l, addr)
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#define writeq_relaxed(q, addr) writeq(q, addr)
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void memset_io(volatile void __iomem *addr, unsigned char val, int count);
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void memcpy_fromio(void *dst, const volatile void __iomem *src, int count);
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void memcpy_toio(volatile void __iomem *dst, const void *src, int count);
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/* Port-space IO */
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#define inb_p inb
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#define inw_p inw
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#define inl_p inl
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#define outb_p outb
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#define outw_p outw
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#define outl_p outl
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extern unsigned char eisa_in8(unsigned short port);
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extern unsigned short eisa_in16(unsigned short port);
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extern unsigned int eisa_in32(unsigned short port);
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extern void eisa_out8(unsigned char data, unsigned short port);
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extern void eisa_out16(unsigned short data, unsigned short port);
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extern void eisa_out32(unsigned int data, unsigned short port);
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#if defined(CONFIG_PCI)
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extern unsigned char inb(int addr);
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extern unsigned short inw(int addr);
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extern unsigned int inl(int addr);
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extern void outb(unsigned char b, int addr);
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extern void outw(unsigned short b, int addr);
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extern void outl(unsigned int b, int addr);
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#elif defined(CONFIG_EISA)
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#define inb eisa_in8
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#define inw eisa_in16
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#define inl eisa_in32
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#define outb eisa_out8
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#define outw eisa_out16
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#define outl eisa_out32
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#else
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static inline char inb(unsigned long addr)
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{
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BUG();
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return -1;
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}
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static inline short inw(unsigned long addr)
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{
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BUG();
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return -1;
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}
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static inline int inl(unsigned long addr)
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{
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BUG();
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return -1;
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}
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#define outb(x, y) ({(void)(x); (void)(y); BUG(); 0;})
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#define outw(x, y) ({(void)(x); (void)(y); BUG(); 0;})
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#define outl(x, y) ({(void)(x); (void)(y); BUG(); 0;})
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#endif
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/*
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* String versions of in/out ops:
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*/
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extern void insb (unsigned long port, void *dst, unsigned long count);
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extern void insw (unsigned long port, void *dst, unsigned long count);
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extern void insl (unsigned long port, void *dst, unsigned long count);
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extern void outsb (unsigned long port, const void *src, unsigned long count);
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extern void outsw (unsigned long port, const void *src, unsigned long count);
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extern void outsl (unsigned long port, const void *src, unsigned long count);
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/* IO Port space is : BBiiii where BB is HBA number. */
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#define IO_SPACE_LIMIT 0x00ffffff
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/* PA machines have an MM I/O space from 0xf0000000-0xffffffff in 32
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* bit mode and from 0xfffffffff0000000-0xfffffffffffffff in 64 bit
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* mode (essentially just sign extending. This macro takes in a 32
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* bit I/O address (still with the leading f) and outputs the correct
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* value for either 32 or 64 bit mode */
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#define F_EXTEND(x) ((unsigned long)((x) | (0xffffffff00000000ULL)))
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#define ioread64 ioread64
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#define ioread64be ioread64be
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#define iowrite64 iowrite64
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#define iowrite64be iowrite64be
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extern u64 ioread64(const void __iomem *addr);
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extern u64 ioread64be(const void __iomem *addr);
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extern void iowrite64(u64 val, void __iomem *addr);
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extern void iowrite64be(u64 val, void __iomem *addr);
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#include <asm-generic/iomap.h>
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/*
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* Convert a physical pointer to a virtual kernel pointer for /dev/mem
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* access
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*/
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#define xlate_dev_mem_ptr(p) __va(p)
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extern int devmem_is_allowed(unsigned long pfn);
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#endif
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