1 /* 2 * (C) Copyright 2004, Psyent Corporation <www.psyent.com> 3 * Scott McNutt <smcnutt@psyent.com> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #ifndef __ASM_NIOS2_IO_H_ 9 #define __ASM_NIOS2_IO_H_ 10 11 static inline void sync(void) 12 { 13 __asm__ __volatile__ ("sync" : : : "memory"); 14 } 15 16 /* 17 * Given a physical address and a length, return a virtual address 18 * that can be used to access the memory range with the caching 19 * properties specified by "flags". 20 */ 21 #define MAP_NOCACHE (0) 22 #define MAP_WRCOMBINE (0) 23 #define MAP_WRBACK (0) 24 #define MAP_WRTHROUGH (0) 25 26 static inline void * 27 map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags) 28 { 29 return (void *)paddr; 30 } 31 32 /* 33 * Take down a mapping set up by map_physmem(). 34 */ 35 static inline void unmap_physmem(void *vaddr, unsigned long flags) 36 { 37 38 } 39 40 static inline phys_addr_t virt_to_phys(void * vaddr) 41 { 42 return (phys_addr_t)(vaddr); 43 } 44 45 static inline void *ioremap(unsigned long physaddr, unsigned long size) 46 { 47 DECLARE_GLOBAL_DATA_PTR; 48 return (void *)(gd->arch.io_region_base | physaddr); 49 } 50 51 #define __raw_writeb(v,a) (*(volatile unsigned char *)(a) = (v)) 52 #define __raw_writew(v,a) (*(volatile unsigned short *)(a) = (v)) 53 #define __raw_writel(v,a) (*(volatile unsigned int *)(a) = (v)) 54 55 #define __raw_readb(a) (*(volatile unsigned char *)(a)) 56 #define __raw_readw(a) (*(volatile unsigned short *)(a)) 57 #define __raw_readl(a) (*(volatile unsigned int *)(a)) 58 59 #define readb(addr)\ 60 ({unsigned char val;\ 61 asm volatile( "ldbio %0, 0(%1)" :"=r"(val) : "r" (addr)); val;}) 62 #define readw(addr)\ 63 ({unsigned short val;\ 64 asm volatile( "ldhio %0, 0(%1)" :"=r"(val) : "r" (addr)); val;}) 65 #define readl(addr)\ 66 ({unsigned long val;\ 67 asm volatile( "ldwio %0, 0(%1)" :"=r"(val) : "r" (addr)); val;}) 68 69 #define writeb(val,addr)\ 70 asm volatile ("stbio %0, 0(%1)" : : "r" (val), "r" (addr)) 71 #define writew(val,addr)\ 72 asm volatile ("sthio %0, 0(%1)" : : "r" (val), "r" (addr)) 73 #define writel(val,addr)\ 74 asm volatile ("stwio %0, 0(%1)" : : "r" (val), "r" (addr)) 75 76 #define inb(addr) readb(addr) 77 #define inw(addr) readw(addr) 78 #define inl(addr) readl(addr) 79 #define outb(val, addr) writeb(val,addr) 80 #define outw(val, addr) writew(val,addr) 81 #define outl(val, addr) writel(val,addr) 82 83 static inline void insb (unsigned long port, void *dst, unsigned long count) 84 { 85 unsigned char *p = dst; 86 while (count--) *p++ = inb (port); 87 } 88 static inline void insw (unsigned long port, void *dst, unsigned long count) 89 { 90 unsigned short *p = dst; 91 while (count--) *p++ = inw (port); 92 } 93 static inline void insl (unsigned long port, void *dst, unsigned long count) 94 { 95 unsigned long *p = dst; 96 while (count--) *p++ = inl (port); 97 } 98 99 static inline void outsb (unsigned long port, const void *src, unsigned long count) 100 { 101 const unsigned char *p = src; 102 while (count--) outb (*p++, port); 103 } 104 105 static inline void outsw (unsigned long port, const void *src, unsigned long count) 106 { 107 const unsigned short *p = src; 108 while (count--) outw (*p++, port); 109 } 110 static inline void outsl (unsigned long port, const void *src, unsigned long count) 111 { 112 const unsigned long *p = src; 113 while (count--) outl (*p++, port); 114 } 115 116 /* 117 * Clear and set bits in one shot. These macros can be used to clear and 118 * set multiple bits in a register using a single call. These macros can 119 * also be used to set a multiple-bit bit pattern using a mask, by 120 * specifying the mask in the 'clear' parameter and the new bit pattern 121 * in the 'set' parameter. 122 */ 123 124 #define out_arch(type,endian,a,v) __raw_write##type(cpu_to_##endian(v),a) 125 #define in_arch(type,endian,a) endian##_to_cpu(__raw_read##type(a)) 126 127 #define out_le32(a,v) out_arch(l,le32,a,v) 128 #define out_le16(a,v) out_arch(w,le16,a,v) 129 130 #define in_le32(a) in_arch(l,le32,a) 131 #define in_le16(a) in_arch(w,le16,a) 132 133 #define out_be32(a,v) out_arch(l,be32,a,v) 134 #define out_be16(a,v) out_arch(w,be16,a,v) 135 136 #define in_be32(a) in_arch(l,be32,a) 137 #define in_be16(a) in_arch(w,be16,a) 138 139 #define out_8(a,v) __raw_writeb(v,a) 140 #define in_8(a) __raw_readb(a) 141 142 #define clrbits(type, addr, clear) \ 143 out_##type((addr), in_##type(addr) & ~(clear)) 144 145 #define setbits(type, addr, set) \ 146 out_##type((addr), in_##type(addr) | (set)) 147 148 #define clrsetbits(type, addr, clear, set) \ 149 out_##type((addr), (in_##type(addr) & ~(clear)) | (set)) 150 151 #define clrbits_be32(addr, clear) clrbits(be32, addr, clear) 152 #define setbits_be32(addr, set) setbits(be32, addr, set) 153 #define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set) 154 155 #define clrbits_le32(addr, clear) clrbits(le32, addr, clear) 156 #define setbits_le32(addr, set) setbits(le32, addr, set) 157 #define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set) 158 159 #define clrbits_be16(addr, clear) clrbits(be16, addr, clear) 160 #define setbits_be16(addr, set) setbits(be16, addr, set) 161 #define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set) 162 163 #define clrbits_le16(addr, clear) clrbits(le16, addr, clear) 164 #define setbits_le16(addr, set) setbits(le16, addr, set) 165 #define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set) 166 167 #define clrbits_8(addr, clear) clrbits(8, addr, clear) 168 #define setbits_8(addr, set) setbits(8, addr, set) 169 #define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set) 170 171 #endif /* __ASM_NIOS2_IO_H_ */ 172