2 * (C) Copyright 2004, Psyent Corporation <www.psyent.com>
3 * Scott McNutt <smcnutt@psyent.com>
5 * SPDX-License-Identifier: GPL-2.0+
8 #ifndef __ASM_NIOS2_IO_H_
9 #define __ASM_NIOS2_IO_H_
11 static inline void sync(void)
13 __asm__ __volatile__ ("sync" : : : "memory");
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".
21 #define MAP_NOCACHE (0)
22 #define MAP_WRCOMBINE (0)
23 #define MAP_WRBACK (0)
24 #define MAP_WRTHROUGH (0)
27 map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
33 * Take down a mapping set up by map_physmem().
35 static inline void unmap_physmem(void *vaddr, unsigned long flags)
40 static inline phys_addr_t virt_to_phys(void * vaddr)
42 return (phys_addr_t)(vaddr);
45 extern unsigned char inb (unsigned char *port);
46 extern unsigned short inw (unsigned short *port);
47 extern unsigned inl (unsigned port);
49 #define __raw_writeb(v,a) (*(volatile unsigned char *)(a) = (v))
50 #define __raw_writew(v,a) (*(volatile unsigned short *)(a) = (v))
51 #define __raw_writel(v,a) (*(volatile unsigned int *)(a) = (v))
53 #define __raw_readb(a) (*(volatile unsigned char *)(a))
54 #define __raw_readw(a) (*(volatile unsigned short *)(a))
55 #define __raw_readl(a) (*(volatile unsigned int *)(a))
59 asm volatile( "ldbio %0, 0(%1)" :"=r"(val) : "r" (addr)); val;})
61 ({unsigned short val;\
62 asm volatile( "ldhio %0, 0(%1)" :"=r"(val) : "r" (addr)); val;})
65 asm volatile( "ldwio %0, 0(%1)" :"=r"(val) : "r" (addr)); val;})
67 #define writeb(val,addr)\
68 asm volatile ("stbio %0, 0(%1)" : : "r" (val), "r" (addr))
69 #define writew(val,addr)\
70 asm volatile ("sthio %0, 0(%1)" : : "r" (val), "r" (addr))
71 #define writel(val,addr)\
72 asm volatile ("stwio %0, 0(%1)" : : "r" (val), "r" (addr))
74 #define inb(addr) readb(addr)
75 #define inw(addr) readw(addr)
76 #define inl(addr) readl(addr)
77 #define outb(val, addr) writeb(val,addr)
78 #define outw(val, addr) writew(val,addr)
79 #define outl(val, addr) writel(val,addr)
81 static inline void insb (unsigned long port, void *dst, unsigned long count)
83 unsigned char *p = dst;
84 while (count--) *p++ = inb (port);
86 static inline void insw (unsigned long port, void *dst, unsigned long count)
88 unsigned short *p = dst;
89 while (count--) *p++ = inw (port);
91 static inline void insl (unsigned long port, void *dst, unsigned long count)
93 unsigned long *p = dst;
94 while (count--) *p++ = inl (port);
97 static inline void outsb (unsigned long port, const void *src, unsigned long count)
99 const unsigned char *p = src;
100 while (count--) outb (*p++, port);
103 static inline void outsw (unsigned long port, const void *src, unsigned long count)
105 const unsigned short *p = src;
106 while (count--) outw (*p++, port);
108 static inline void outsl (unsigned long port, const void *src, unsigned long count)
110 const unsigned long *p = src;
111 while (count--) outl (*p++, port);
114 #endif /* __ASM_NIOS2_IO_H_ */