1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __SPARC_IO_H 3 #define __SPARC_IO_H 4 5 #include <linux/kernel.h> 6 #include <linux/ioport.h> /* struct resource */ 7 8 #define IO_SPACE_LIMIT 0xffffffff 9 10 #define memset_io(d,c,sz) _memset_io(d,c,sz) 11 #define memcpy_fromio(d,s,sz) _memcpy_fromio(d,s,sz) 12 #define memcpy_toio(d,s,sz) _memcpy_toio(d,s,sz) 13 14 #include <asm-generic/io.h> 15 16 static inline void _memset_io(volatile void __iomem *dst, 17 int c, __kernel_size_t n) 18 { 19 volatile void __iomem *d = dst; 20 21 while (n--) { 22 writeb(c, d); 23 d++; 24 } 25 } 26 27 static inline void _memcpy_fromio(void *dst, const volatile void __iomem *src, 28 __kernel_size_t n) 29 { 30 char *d = dst; 31 32 while (n--) { 33 char tmp = readb(src); 34 *d++ = tmp; 35 src++; 36 } 37 } 38 39 static inline void _memcpy_toio(volatile void __iomem *dst, const void *src, 40 __kernel_size_t n) 41 { 42 const char *s = src; 43 volatile void __iomem *d = dst; 44 45 while (n--) { 46 char tmp = *s++; 47 writeb(tmp, d); 48 d++; 49 } 50 } 51 52 /* 53 * SBus accessors. 54 * 55 * SBus has only one, memory mapped, I/O space. 56 * We do not need to flip bytes for SBus of course. 57 */ 58 static inline u8 sbus_readb(const volatile void __iomem *addr) 59 { 60 return *(__force volatile u8 *)addr; 61 } 62 63 static inline u16 sbus_readw(const volatile void __iomem *addr) 64 { 65 return *(__force volatile u16 *)addr; 66 } 67 68 static inline u32 sbus_readl(const volatile void __iomem *addr) 69 { 70 return *(__force volatile u32 *)addr; 71 } 72 73 static inline void sbus_writeb(u8 b, volatile void __iomem *addr) 74 { 75 *(__force volatile u8 *)addr = b; 76 } 77 78 static inline void sbus_writew(u16 w, volatile void __iomem *addr) 79 { 80 *(__force volatile u16 *)addr = w; 81 } 82 83 static inline void sbus_writel(u32 l, volatile void __iomem *addr) 84 { 85 *(__force volatile u32 *)addr = l; 86 } 87 88 static inline void sbus_memset_io(volatile void __iomem *__dst, int c, 89 __kernel_size_t n) 90 { 91 while(n--) { 92 sbus_writeb(c, __dst); 93 __dst++; 94 } 95 } 96 97 static inline void sbus_memcpy_fromio(void *dst, 98 const volatile void __iomem *src, 99 __kernel_size_t n) 100 { 101 char *d = dst; 102 103 while (n--) { 104 char tmp = sbus_readb(src); 105 *d++ = tmp; 106 src++; 107 } 108 } 109 110 static inline void sbus_memcpy_toio(volatile void __iomem *dst, 111 const void *src, 112 __kernel_size_t n) 113 { 114 const char *s = src; 115 volatile void __iomem *d = dst; 116 117 while (n--) { 118 char tmp = *s++; 119 sbus_writeb(tmp, d); 120 d++; 121 } 122 } 123 124 #ifdef __KERNEL__ 125 126 /* 127 * Bus number may be embedded in the higher bits of the physical address. 128 * This is why we have no bus number argument to ioremap(). 129 */ 130 void iounmap(volatile void __iomem *addr); 131 /* Create a virtual mapping cookie for an IO port range */ 132 void __iomem *ioport_map(unsigned long port, unsigned int nr); 133 void ioport_unmap(void __iomem *); 134 135 /* Create a virtual mapping cookie for a PCI BAR (memory or IO) */ 136 struct pci_dev; 137 void pci_iounmap(struct pci_dev *dev, void __iomem *); 138 139 static inline int sbus_can_dma_64bit(void) 140 { 141 return 0; /* actually, sparc_cpu_model==sun4d */ 142 } 143 static inline int sbus_can_burst64(void) 144 { 145 return 0; /* actually, sparc_cpu_model==sun4d */ 146 } 147 struct device; 148 void sbus_set_sbus64(struct device *, int); 149 150 #endif 151 152 #define __ARCH_HAS_NO_PAGE_ZERO_MAPPED 1 153 154 155 #endif /* !(__SPARC_IO_H) */ 156