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 #define kc_xlate_dev_mem_ptr xlate_dev_mem_ptr 20 void *xlate_dev_mem_ptr(phys_addr_t phys); 21 #define unxlate_dev_mem_ptr unxlate_dev_mem_ptr 22 #define kc_unxlate_dev_mem_ptr unxlate_dev_mem_ptr 23 void unxlate_dev_mem_ptr(phys_addr_t phys, void *addr); 24 25 #define IO_SPACE_LIMIT 0 26 27 /* 28 * I/O memory mapping functions. 29 */ 30 #define ioremap_prot ioremap_prot 31 #define iounmap iounmap 32 33 #define _PAGE_IOREMAP pgprot_val(PAGE_KERNEL) 34 35 #define ioremap_wc(addr, size) \ 36 ioremap_prot((addr), (size), pgprot_val(pgprot_writecombine(PAGE_KERNEL))) 37 #define ioremap_wt(addr, size) \ 38 ioremap_prot((addr), (size), pgprot_val(pgprot_writethrough(PAGE_KERNEL))) 39 40 static inline void __iomem *ioport_map(unsigned long port, unsigned int nr) 41 { 42 return NULL; 43 } 44 45 static inline void ioport_unmap(void __iomem *p) 46 { 47 } 48 49 #ifdef CONFIG_PCI 50 51 /* 52 * s390 needs a private implementation of pci_iomap since ioremap with its 53 * offset parameter isn't sufficient. That's because BAR spaces are not 54 * disjunctive on s390 so we need the bar parameter of pci_iomap to find 55 * the corresponding device and create the mapping cookie. 56 */ 57 #define pci_iomap pci_iomap 58 #define pci_iomap_range pci_iomap_range 59 #define pci_iounmap pci_iounmap 60 #define pci_iomap_wc pci_iomap_wc 61 #define pci_iomap_wc_range pci_iomap_wc_range 62 63 #define memcpy_fromio(dst, src, count) zpci_memcpy_fromio(dst, src, count) 64 #define memcpy_toio(dst, src, count) zpci_memcpy_toio(dst, src, count) 65 #define memset_io(dst, val, count) zpci_memset_io(dst, val, count) 66 67 #define mmiowb() zpci_barrier() 68 69 #define __raw_readb zpci_read_u8 70 #define __raw_readw zpci_read_u16 71 #define __raw_readl zpci_read_u32 72 #define __raw_readq zpci_read_u64 73 #define __raw_writeb zpci_write_u8 74 #define __raw_writew zpci_write_u16 75 #define __raw_writel zpci_write_u32 76 #define __raw_writeq zpci_write_u64 77 78 /* combine single writes by using store-block insn */ 79 static inline void __iowrite32_copy(void __iomem *to, const void *from, 80 size_t count) 81 { 82 zpci_memcpy_toio(to, from, count * 4); 83 } 84 #define __iowrite32_copy __iowrite32_copy 85 86 static inline void __iowrite64_copy(void __iomem *to, const void *from, 87 size_t count) 88 { 89 zpci_memcpy_toio(to, from, count * 8); 90 } 91 #define __iowrite64_copy __iowrite64_copy 92 93 #endif /* CONFIG_PCI */ 94 95 #include <asm-generic/io.h> 96 97 #endif 98