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 /* TODO: s390 cannot support io_remap_pfn_range... */ 54 #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \ 55 remap_pfn_range(vma, vaddr, pfn, size, prot) 56 57 static inline void __iomem *ioremap(unsigned long offset, unsigned long size) 58 { 59 return (void __iomem *) offset; 60 } 61 62 static inline void iounmap(volatile void __iomem *addr) 63 { 64 } 65 66 /* 67 * s390 needs a private implementation of pci_iomap since ioremap with its 68 * offset parameter isn't sufficient. That's because BAR spaces are not 69 * disjunctive on s390 so we need the bar parameter of pci_iomap to find 70 * the corresponding device and create the mapping cookie. 71 */ 72 #define pci_iomap pci_iomap 73 #define pci_iounmap pci_iounmap 74 75 #define memcpy_fromio(dst, src, count) zpci_memcpy_fromio(dst, src, count) 76 #define memcpy_toio(dst, src, count) zpci_memcpy_toio(dst, src, count) 77 #define memset_io(dst, val, count) zpci_memset_io(dst, val, count) 78 79 #define __raw_readb zpci_read_u8 80 #define __raw_readw zpci_read_u16 81 #define __raw_readl zpci_read_u32 82 #define __raw_readq zpci_read_u64 83 #define __raw_writeb zpci_write_u8 84 #define __raw_writew zpci_write_u16 85 #define __raw_writel zpci_write_u32 86 #define __raw_writeq zpci_write_u64 87 88 #define readb_relaxed readb 89 #define readw_relaxed readw 90 #define readl_relaxed readl 91 #define readq_relaxed readq 92 93 #endif /* CONFIG_PCI */ 94 95 #include <asm-generic/io.h> 96 97 #endif 98