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Diffstat (limited to '')
| -rw-r--r-- | arch/parisc/include/asm/io.h | 275 |
1 files changed, 275 insertions, 0 deletions
diff --git a/arch/parisc/include/asm/io.h b/arch/parisc/include/asm/io.h new file mode 100644 index 000000000..c05e781be --- /dev/null +++ b/arch/parisc/include/asm/io.h @@ -0,0 +1,275 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_IO_H +#define _ASM_IO_H + +#include <linux/types.h> +#include <linux/pgtable.h> + +#define virt_to_phys(a) ((unsigned long)__pa(a)) +#define phys_to_virt(a) __va(a) + +static inline unsigned long isa_bus_to_virt(unsigned long addr) { + BUG(); + return 0; +} + +static inline unsigned long isa_virt_to_bus(void *addr) { + BUG(); + return 0; +} + +/* + * Memory mapped I/O + * + * readX()/writeX() do byteswapping and take an ioremapped address + * __raw_readX()/__raw_writeX() don't byteswap and take an ioremapped address. + * gsc_*() don't byteswap and operate on physical addresses; + * eg dev->hpa or 0xfee00000. + */ + +static inline unsigned char gsc_readb(unsigned long addr) +{ + long flags; + unsigned char ret; + + __asm__ __volatile__( + " rsm %3,%0\n" + " ldbx 0(%2),%1\n" + " mtsm %0\n" + : "=&r" (flags), "=r" (ret) : "r" (addr), "i" (PSW_SM_D) ); + + return ret; +} + +static inline unsigned short gsc_readw(unsigned long addr) +{ + long flags; + unsigned short ret; + + __asm__ __volatile__( + " rsm %3,%0\n" + " ldhx 0(%2),%1\n" + " mtsm %0\n" + : "=&r" (flags), "=r" (ret) : "r" (addr), "i" (PSW_SM_D) ); + + return ret; +} + +static inline unsigned int gsc_readl(unsigned long addr) +{ + u32 ret; + + __asm__ __volatile__( + " ldwax 0(%1),%0\n" + : "=r" (ret) : "r" (addr) ); + + return ret; +} + +static inline unsigned long long gsc_readq(unsigned long addr) +{ + unsigned long long ret; + +#ifdef CONFIG_64BIT + __asm__ __volatile__( + " ldda 0(%1),%0\n" + : "=r" (ret) : "r" (addr) ); +#else + /* two reads may have side effects.. */ + ret = ((u64) gsc_readl(addr)) << 32; + ret |= gsc_readl(addr+4); +#endif + return ret; +} + +static inline void gsc_writeb(unsigned char val, unsigned long addr) +{ + long flags; + __asm__ __volatile__( + " rsm %3,%0\n" + " stbs %1,0(%2)\n" + " mtsm %0\n" + : "=&r" (flags) : "r" (val), "r" (addr), "i" (PSW_SM_D) ); +} + +static inline void gsc_writew(unsigned short val, unsigned long addr) +{ + long flags; + __asm__ __volatile__( + " rsm %3,%0\n" + " sths %1,0(%2)\n" + " mtsm %0\n" + : "=&r" (flags) : "r" (val), "r" (addr), "i" (PSW_SM_D) ); +} + +static inline void gsc_writel(unsigned int val, unsigned long addr) +{ + __asm__ __volatile__( + " stwas %0,0(%1)\n" + : : "r" (val), "r" (addr) ); +} + +static inline void gsc_writeq(unsigned long long val, unsigned long addr) +{ +#ifdef CONFIG_64BIT + __asm__ __volatile__( + " stda %0,0(%1)\n" + : : "r" (val), "r" (addr) ); +#else + /* two writes may have side effects.. */ + gsc_writel(val >> 32, addr); + gsc_writel(val, addr+4); +#endif +} + +/* + * The standard PCI ioremap interfaces + */ +void __iomem *ioremap(unsigned long offset, unsigned long size); +#define ioremap_wc ioremap +#define ioremap_uc ioremap +#define pci_iounmap pci_iounmap + +extern void iounmap(const volatile void __iomem *addr); + +void memset_io(volatile void __iomem *addr, unsigned char val, int count); +void memcpy_fromio(void *dst, const volatile void __iomem *src, int count); +void memcpy_toio(volatile void __iomem *dst, const void *src, int count); +#define memset_io memset_io +#define memcpy_fromio memcpy_fromio +#define memcpy_toio memcpy_toio + +/* Port-space IO */ + +#define inb_p inb +#define inw_p inw +#define inl_p inl +#define outb_p outb +#define outw_p outw +#define outl_p outl + +extern unsigned char eisa_in8(unsigned short port); +extern unsigned short eisa_in16(unsigned short port); +extern unsigned int eisa_in32(unsigned short port); +extern void eisa_out8(unsigned char data, unsigned short port); +extern void eisa_out16(unsigned short data, unsigned short port); +extern void eisa_out32(unsigned int data, unsigned short port); + +#if defined(CONFIG_PCI) +extern unsigned char inb(int addr); +extern unsigned short inw(int addr); +extern unsigned int inl(int addr); +extern void outb(unsigned char b, int addr); +extern void outw(unsigned short b, int addr); +extern void outl(unsigned int b, int addr); +#define inb inb +#define inw inw +#define inl inl +#define outb outb +#define outw outw +#define outl outl +#elif defined(CONFIG_EISA) +#define inb eisa_in8 +#define inw eisa_in16 +#define inl eisa_in32 +#define outb eisa_out8 +#define outw eisa_out16 +#define outl eisa_out32 +#else +static inline char inb(unsigned long addr) +{ + BUG(); + return -1; +} + +static inline short inw(unsigned long addr) +{ + BUG(); + return -1; +} + +static inline int inl(unsigned long addr) +{ + BUG(); + return -1; +} +#define inb inb +#define inw inw +#define inl inl +#define outb(x, y) ({(void)(x); (void)(y); BUG(); 0;}) +#define outw(x, y) ({(void)(x); (void)(y); BUG(); 0;}) +#define outl(x, y) ({(void)(x); (void)(y); BUG(); 0;}) +#endif + +/* + * String versions of in/out ops: + */ +extern void insb (unsigned long port, void *dst, unsigned long count); +extern void insw (unsigned long port, void *dst, unsigned long count); +extern void insl (unsigned long port, void *dst, unsigned long count); +extern void outsb (unsigned long port, const void *src, unsigned long count); +extern void outsw (unsigned long port, const void *src, unsigned long count); +extern void outsl (unsigned long port, const void *src, unsigned long count); +#define insb insb +#define insw insw +#define insl insl +#define outsb outsb +#define outsw outsw +#define outsl outsl + +/* IO Port space is : BBiiii where BB is HBA number. */ +#define IO_SPACE_LIMIT 0x00ffffff + +/* PA machines have an MM I/O space from 0xf0000000-0xffffffff in 32 + * bit mode and from 0xfffffffff0000000-0xfffffffffffffff in 64 bit + * mode (essentially just sign extending. This macro takes in a 32 + * bit I/O address (still with the leading f) and outputs the correct + * value for either 32 or 64 bit mode */ +#define F_EXTEND(x) ((unsigned long)((x) | (0xffffffff00000000ULL))) + +#ifdef CONFIG_64BIT +#define ioread64 ioread64 +#define ioread64be ioread64be +#define iowrite64 iowrite64 +#define iowrite64be iowrite64be +extern u64 ioread64(const void __iomem *addr); +extern u64 ioread64be(const void __iomem *addr); +extern void iowrite64(u64 val, void __iomem *addr); +extern void iowrite64be(u64 val, void __iomem *addr); +#endif + +#include <asm-generic/iomap.h> +/* + * These get provided from <asm-generic/iomap.h> since parisc does not + * select GENERIC_IOMAP. + */ +#define ioport_map ioport_map +#define ioport_unmap ioport_unmap +#define ioread8 ioread8 +#define ioread16 ioread16 +#define ioread32 ioread32 +#define ioread16be ioread16be +#define ioread32be ioread32be +#define iowrite8 iowrite8 +#define iowrite16 iowrite16 +#define iowrite32 iowrite32 +#define iowrite16be iowrite16be +#define iowrite32be iowrite32be +#define ioread8_rep ioread8_rep +#define ioread16_rep ioread16_rep +#define ioread32_rep ioread32_rep +#define iowrite8_rep iowrite8_rep +#define iowrite16_rep iowrite16_rep +#define iowrite32_rep iowrite32_rep + +/* + * Convert a physical pointer to a virtual kernel pointer for /dev/mem + * access + */ +#define xlate_dev_mem_ptr(p) __va(p) + +extern int devmem_is_allowed(unsigned long pfn); + +#include <asm-generic/io.h> + +#endif |