/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_IO_H #define _ASM_IO_H #include #include #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 */ #define ioremap_prot ioremap_prot #define _PAGE_IOREMAP (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | \ _PAGE_ACCESSED | _PAGE_NO_CACHE) #define ioremap_wc(addr, size) \ ioremap_prot((addr), (size), _PAGE_IOREMAP) #define pci_iounmap pci_iounmap 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 /* * These get provided from 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 extern int devmem_is_allowed(unsigned long pfn); #include #endif