| 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 __iomem *ioremap(unsigned long offset, unsigned long size); |
| 131 | #define ioremap_nocache(X,Y) ioremap((X),(Y)) |
| 132 | #define ioremap_wc(X,Y) ioremap((X),(Y)) |
| 133 | #define ioremap_wt(X,Y) ioremap((X),(Y)) |
| 134 | void iounmap(volatile void __iomem *addr); |
| 135 | |
| 136 | /* Create a virtual mapping cookie for an IO port range */ |
| 137 | void __iomem *ioport_map(unsigned long port, unsigned int nr); |
| 138 | void ioport_unmap(void __iomem *); |
| 139 | |
| 140 | /* Create a virtual mapping cookie for a PCI BAR (memory or IO) */ |
| 141 | struct pci_dev; |
| 142 | void pci_iounmap(struct pci_dev *dev, void __iomem *); |
| 143 | |
| 144 | static inline int sbus_can_dma_64bit(void) |
| 145 | { |
| 146 | return 0; /* actually, sparc_cpu_model==sun4d */ |
| 147 | } |
| 148 | static inline int sbus_can_burst64(void) |
| 149 | { |
| 150 | return 0; /* actually, sparc_cpu_model==sun4d */ |
| 151 | } |
| 152 | struct device; |
| 153 | void sbus_set_sbus64(struct device *, int); |
| 154 | |
| 155 | #endif |
| 156 | |
| 157 | #define __ARCH_HAS_NO_PAGE_ZERO_MAPPED 1 |
| 158 | |
| 159 | |
| 160 | #endif /* !(__SPARC_IO_H) */ |