1 /* 2 * S390 version 3 * Copyright IBM Corp. 1999 4 * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com) 5 * 6 * Derived from "include/asm-i386/io.h" 7 */ 8 9 #ifndef _S390_IO_H 10 #define _S390_IO_H 11 12 #include <linux/kernel.h> 13 #include <asm/page.h> 14 #include <asm/pci_io.h> 15 16 /* 17 * Change virtual addresses to physical addresses and vv. 18 * These are pretty trivial 19 */ 20 static inline unsigned long virt_to_phys(volatile void * address) 21 { 22 unsigned long real_address; 23 asm volatile( 24 " lra %0,0(%1)\n" 25 " jz 0f\n" 26 " la %0,0\n" 27 "0:" 28 : "=a" (real_address) : "a" (address) : "cc"); 29 return real_address; 30 } 31 #define virt_to_phys virt_to_phys 32 33 static inline void * phys_to_virt(unsigned long address) 34 { 35 return (void *) address; 36 } 37 38 void *xlate_dev_mem_ptr(unsigned long phys); 39 void unxlate_dev_mem_ptr(unsigned long phys, void *addr); 40 41 /* 42 * Convert a virtual cached pointer to an uncached pointer 43 */ 44 #define xlate_dev_kmem_ptr(p) p 45 46 #define IO_SPACE_LIMIT 0 47 48 #ifdef CONFIG_PCI 49 50 #define ioremap_nocache(addr, size) ioremap(addr, size) 51 #define ioremap_wc ioremap_nocache 52 53 static inline void __iomem *ioremap(unsigned long offset, unsigned long size) 54 { 55 return (void __iomem *) offset; 56 } 57 58 static inline void iounmap(volatile void __iomem *addr) 59 { 60 } 61 62 /* 63 * s390 needs a private implementation of pci_iomap since ioremap with its 64 * offset parameter isn't sufficient. That's because BAR spaces are not 65 * disjunctive on s390 so we need the bar parameter of pci_iomap to find 66 * the corresponding device and create the mapping cookie. 67 */ 68 #define pci_iomap pci_iomap 69 #define pci_iounmap pci_iounmap 70 71 #define memcpy_fromio(dst, src, count) zpci_memcpy_fromio(dst, src, count) 72 #define memcpy_toio(dst, src, count) zpci_memcpy_toio(dst, src, count) 73 #define memset_io(dst, val, count) zpci_memset_io(dst, val, count) 74 75 #define __raw_readb zpci_read_u8 76 #define __raw_readw zpci_read_u16 77 #define __raw_readl zpci_read_u32 78 #define __raw_readq zpci_read_u64 79 #define __raw_writeb zpci_write_u8 80 #define __raw_writew zpci_write_u16 81 #define __raw_writel zpci_write_u32 82 #define __raw_writeq zpci_write_u64 83 84 #define readb_relaxed readb 85 #define readw_relaxed readw 86 #define readl_relaxed readl 87 #define readq_relaxed readq 88 89 #endif /* CONFIG_PCI */ 90 91 #include <asm-generic/io.h> 92 93 #endif 94