276 lines
6.7 KiB
C
276 lines
6.7 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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#define pci_iounmap pci_iounmap
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extern void iounmap(const volatile void __iomem *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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#define memset_io memset_io
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#define memcpy_fromio memcpy_fromio
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#define memcpy_toio memcpy_toio
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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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#define inb inb
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#define inw inw
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#define inl inl
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#define outb outb
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#define outw outw
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#define outl outl
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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 inb inb
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#define inw inw
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#define inl inl
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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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#define insb insb
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#define insw insw
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#define insl insl
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#define outsb outsb
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#define outsw outsw
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#define outsl outsl
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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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#ifdef CONFIG_64BIT
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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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#endif
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#include <asm-generic/iomap.h>
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/*
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* These get provided from <asm-generic/iomap.h> since parisc does not
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* select GENERIC_IOMAP.
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*/
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#define ioport_map ioport_map
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#define ioport_unmap ioport_unmap
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#define ioread8 ioread8
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#define ioread16 ioread16
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#define ioread32 ioread32
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#define ioread16be ioread16be
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#define ioread32be ioread32be
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#define iowrite8 iowrite8
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#define iowrite16 iowrite16
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#define iowrite32 iowrite32
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#define iowrite16be iowrite16be
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#define iowrite32be iowrite32be
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#define ioread8_rep ioread8_rep
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#define ioread16_rep ioread16_rep
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#define ioread32_rep ioread32_rep
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#define iowrite8_rep iowrite8_rep
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#define iowrite16_rep iowrite16_rep
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#define iowrite32_rep iowrite32_rep
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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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#include <asm-generic/io.h>
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#endif
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