1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * S390 version 4 * Copyright IBM Corp. 1999 5 * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com) 6 * 7 * Derived from "include/asm-i386/io.h" 8 */ 9 10 #ifndef _S390_IO_H 11 #define _S390_IO_H 12 13 #include <linux/kernel.h> 14 #include <asm/page.h> 15 #include <asm/pgtable.h> 16 #include <asm/pci_io.h> 17 18 #define xlate_dev_mem_ptr xlate_dev_mem_ptr 19 void *xlate_dev_mem_ptr(phys_addr_t phys); 20 #define unxlate_dev_mem_ptr unxlate_dev_mem_ptr 21 void unxlate_dev_mem_ptr(phys_addr_t phys, void *addr); 22 23 #define IO_SPACE_LIMIT 0 24 25 /* 26 * I/O memory mapping functions. 27 */ 28 #define ioremap_prot ioremap_prot 29 #define iounmap iounmap 30 31 #define _PAGE_IOREMAP pgprot_val(PAGE_KERNEL) 32 33 #define ioremap_wc(addr, size) \ 34 ioremap_prot((addr), (size), pgprot_val(pgprot_writecombine(PAGE_KERNEL))) 35 #define ioremap_wt(addr, size) \ 36 ioremap_prot((addr), (size), pgprot_val(pgprot_writethrough(PAGE_KERNEL))) 37 38 static inline void __iomem *ioport_map(unsigned long port, unsigned int nr) 39 { 40 return NULL; 41 } 42 43 static inline void ioport_unmap(void __iomem *p) 44 { 45 } 46 47 #ifdef CONFIG_PCI 48 49 /* 50 * s390 needs a private implementation of pci_iomap since ioremap with its 51 * offset parameter isn't sufficient. That's because BAR spaces are not 52 * disjunctive on s390 so we need the bar parameter of pci_iomap to find 53 * the corresponding device and create the mapping cookie. 54 */ 55 #define pci_iomap pci_iomap 56 #define pci_iomap_range pci_iomap_range 57 #define pci_iounmap pci_iounmap 58 #define pci_iomap_wc pci_iomap_wc 59 #define pci_iomap_wc_range pci_iomap_wc_range 60 61 #define memcpy_fromio(dst, src, count) zpci_memcpy_fromio(dst, src, count) 62 #define memcpy_toio(dst, src, count) zpci_memcpy_toio(dst, src, count) 63 #define memset_io(dst, val, count) zpci_memset_io(dst, val, count) 64 65 #define mmiowb() zpci_barrier() 66 67 #define __raw_readb zpci_read_u8 68 #define __raw_readw zpci_read_u16 69 #define __raw_readl zpci_read_u32 70 #define __raw_readq zpci_read_u64 71 #define __raw_writeb zpci_write_u8 72 #define __raw_writew zpci_write_u16 73 #define __raw_writel zpci_write_u32 74 #define __raw_writeq zpci_write_u64 75 76 /* combine single writes by using store-block insn */ 77 static inline void __iowrite32_copy(void __iomem *to, const void *from, 78 size_t count) 79 { 80 zpci_memcpy_toio(to, from, count * 4); 81 } 82 #define __iowrite32_copy __iowrite32_copy 83 84 static inline void __iowrite64_copy(void __iomem *to, const void *from, 85 size_t count) 86 { 87 zpci_memcpy_toio(to, from, count * 8); 88 } 89 #define __iowrite64_copy __iowrite64_copy 90 91 #endif /* CONFIG_PCI */ 92 93 #include <asm-generic/io.h> 94 95 #endif 96