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93e1552cb1
Add defines for {in,out}s{b,w,l}() functions to make sure that
they will be used by asm-generic/io.h
Signed-off-by: Igor Prusov <ivprusov@salutedevices.com>
318 lines
9.4 KiB
C
318 lines
9.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* (C) Copyright 2000-2002
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*/
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#ifndef _ASM_IO_H
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#define _ASM_IO_H
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#include <compiler.h>
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/*
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* This file contains the definitions for the x86 IO instructions
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* inb/inw/inl/outb/outw/outl and the "string versions" of the same
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* (insb/insw/insl/outsb/outsw/outsl). You can also use "pausing"
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* versions of the single-IO instructions (inb_p/inw_p/..).
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*
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* This file is not meant to be obfuscating: it's just complicated
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* to (a) handle it all in a way that makes gcc able to optimize it
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* as well as possible and (b) trying to avoid writing the same thing
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* over and over again with slight variations and possibly making a
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* mistake somewhere.
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*/
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/*
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* Thanks to James van Artsdalen for a better timing-fix than
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* the two short jumps: using outb's to a nonexistent port seems
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* to guarantee better timings even on fast machines.
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*
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* On the other hand, I'd like to be sure of a non-existent port:
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* I feel a bit unsafe about using 0x80 (should be safe, though)
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*
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* Linus
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*/
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/*
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* Bit simplified and optimized by Jan Hubicka
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* Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999.
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*
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* isa_memset_io, isa_memcpy_fromio, isa_memcpy_toio added,
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* isa_read[wl] and isa_write[wl] fixed
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* - Arnaldo Carvalho de Melo <acme@conectiva.com.br>
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*/
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#define IO_SPACE_LIMIT 0xffff
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#include <asm/types.h>
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#ifdef __KERNEL__
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/*
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* readX/writeX() are used to access memory mapped devices. On some
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* architectures the memory mapped IO stuff needs to be accessed
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* differently. On the x86 architecture, we just read/write the
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* memory location directly.
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*/
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#define readb(addr) (*(volatile u8 *)(uintptr_t)(addr))
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#define readw(addr) (*(volatile u16 *)(uintptr_t)(addr))
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#define readl(addr) (*(volatile u32 *)(uintptr_t)(addr))
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#define readq(addr) (*(volatile u64 *)(uintptr_t)(addr))
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#define __raw_readb readb
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#define __raw_readw readw
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#define __raw_readl readl
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#define __raw_readq readq
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#define writeb(b, addr) (*(volatile u8 *)(addr) = (b))
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#define writew(b, addr) (*(volatile u16 *)(addr) = (b))
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#define writel(b, addr) (*(volatile u32 *)(addr) = (b))
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#define writeq(b, addr) (*(volatile u64 *)(addr) = (b))
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#define __raw_writeb writeb
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#define __raw_writew writew
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#define __raw_writel writel
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#define __raw_writeq writeq
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#define memset_io(a,b,c) memset((a),(b),(c))
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#define memcpy_fromio(a,b,c) memcpy((a),(b),(c))
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#define memcpy_toio(a,b,c) memcpy((a),(b),(c))
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#define out_arch(type, endian, a, v) __raw_write##type(cpu_to_##endian(v), a)
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#define in_arch(type, endian, a) endian##_to_cpu(__raw_read##type(a))
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#define out_le64(a, v) out_arch(q, le64, a, v)
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#define out_le32(a, v) out_arch(l, le32, a, v)
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#define out_le16(a, v) out_arch(w, le16, a, v)
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#define in_le64(a) in_arch(q, le64, a)
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#define in_le32(a) in_arch(l, le32, a)
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#define in_le16(a) in_arch(w, le16, a)
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#define out_be32(a, v) out_arch(l, be32, a, v)
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#define out_be16(a, v) out_arch(w, be16, a, v)
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#define in_be32(a) in_arch(l, be32, a)
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#define in_be16(a) in_arch(w, be16, a)
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#define out_8(a, v) __raw_writeb(v, a)
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#define in_8(a) __raw_readb(a)
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#define clrbits(type, addr, clear) \
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out_##type((addr), in_##type(addr) & ~(clear))
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#define setbits(type, addr, set) \
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out_##type((addr), in_##type(addr) | (set))
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#define clrsetbits(type, addr, clear, set) \
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out_##type((addr), (in_##type(addr) & ~(clear)) | (set))
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#define clrbits_be32(addr, clear) clrbits(be32, addr, clear)
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#define setbits_be32(addr, set) setbits(be32, addr, set)
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#define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set)
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#define clrbits_le32(addr, clear) clrbits(le32, addr, clear)
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#define setbits_le32(addr, set) setbits(le32, addr, set)
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#define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set)
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#define clrbits_be16(addr, clear) clrbits(be16, addr, clear)
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#define setbits_be16(addr, set) setbits(be16, addr, set)
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#define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set)
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#define clrbits_le16(addr, clear) clrbits(le16, addr, clear)
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#define setbits_le16(addr, set) setbits(le16, addr, set)
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#define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set)
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#define clrbits_8(addr, clear) clrbits(8, addr, clear)
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#define setbits_8(addr, set) setbits(8, addr, set)
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#define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set)
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#endif /* __KERNEL__ */
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#ifdef SLOW_IO_BY_JUMPING
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#define __SLOW_DOWN_IO "\njmp 1f\n1:\tjmp 1f\n1:"
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#else
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#define __SLOW_DOWN_IO "\noutb %%al,$0xed"
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#endif
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#ifdef REALLY_SLOW_IO
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#define __FULL_SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO
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#else
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#define __FULL_SLOW_DOWN_IO __SLOW_DOWN_IO
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#endif
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/*
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* Talk about misusing macros..
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*/
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#define __OUT1(s,x) \
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static inline void _out##s(unsigned x value, unsigned short port) {
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#define __OUT2(s,s1,s2) \
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__asm__ __volatile__ ("out" #s " %" s1 "0,%" s2 "1"
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#define __OUT(s,s1,x) \
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__OUT1(s,x) __OUT2(s,s1,"w") : : "a" (value), "Nd" (port)); } \
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__OUT1(s##_p,x) __OUT2(s,s1,"w") __FULL_SLOW_DOWN_IO : : "a" (value), "Nd" (port));}
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#define __IN1(s) \
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static inline RETURN_TYPE _in##s(unsigned short port) { RETURN_TYPE _v;
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#define __IN2(s,s1,s2) \
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__asm__ __volatile__ ("in" #s " %" s2 "1,%" s1 "0"
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#define __IN(s,s1,i...) \
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__IN1(s) __IN2(s,s1,"w") : "=a" (_v) : "Nd" (port) ,##i ); return _v; } \
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__IN1(s##_p) __IN2(s,s1,"w") __FULL_SLOW_DOWN_IO : "=a" (_v) : "Nd" (port) ,##i ); return _v; }
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#define __INS(s) \
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static inline void ins##s(unsigned short port, void * addr, unsigned long count) \
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{ __asm__ __volatile__ ("rep ; ins" #s \
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: "=D" (addr), "=c" (count) : "d" (port),"0" (addr),"1" (count)); }
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#define __OUTS(s) \
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static inline void outs##s(unsigned short port, const void * addr, unsigned long count) \
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{ __asm__ __volatile__ ("rep ; outs" #s \
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: "=S" (addr), "=c" (count) : "d" (port),"0" (addr),"1" (count)); }
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#define RETURN_TYPE unsigned char
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__IN(b,"")
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#undef RETURN_TYPE
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#define RETURN_TYPE unsigned short
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__IN(w,"")
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#undef RETURN_TYPE
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#define RETURN_TYPE unsigned int
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__IN(l,"")
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#undef RETURN_TYPE
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#define inb(port) _inb((uintptr_t)(port))
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#define inw(port) _inw((uintptr_t)(port))
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#define inl(port) _inl((uintptr_t)(port))
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__OUT(b,"b",char)
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__OUT(w,"w",short)
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__OUT(l,,int)
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#define outb(val, port) _outb(val, (uintptr_t)(port))
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#define outw(val, port) _outw(val, (uintptr_t)(port))
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#define outl(val, port) _outl(val, (uintptr_t)(port))
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__INS(b)
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__INS(w)
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__INS(l)
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#define insb insb
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#define insw insw
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#define insl insl
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__OUTS(b)
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__OUTS(w)
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__OUTS(l)
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#define outsb outsb
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#define outsw outsw
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#define outsl outsl
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/* IO space accessors */
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#define clrio(type, addr, clear) \
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out##type(in##type(addr) & ~(clear), (addr))
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#define setio(type, addr, set) \
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out##type(in##type(addr) | (set), (addr))
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#define clrsetio(type, addr, clear, set) \
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out##type((in##type(addr) & ~(clear)) | (set), (addr))
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#define clrio_32(addr, clear) clrio(l, addr, clear)
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#define clrio_16(addr, clear) clrio(w, addr, clear)
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#define clrio_8(addr, clear) clrio(b, addr, clear)
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#define setio_32(addr, set) setio(l, addr, set)
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#define setio_16(addr, set) setio(w, addr, set)
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#define setio_8(addr, set) setio(b, addr, set)
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#define clrsetio_32(addr, clear, set) clrsetio(l, addr, clear, set)
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#define clrsetio_16(addr, clear, set) clrsetio(w, addr, clear, set)
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#define clrsetio_8(addr, clear, set) clrsetio(b, addr, clear, set)
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static inline void sync(void)
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{
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}
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/*
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* TODO: The kernel offers some more advanced versions of barriers, it might
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* have some advantages to use them instead of the simple one here.
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*/
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#define dmb() __asm__ __volatile__ ("" : : : "memory")
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#define __iormb() dmb()
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#define __iowmb() dmb()
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/*
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* Read/write from/to an (offsettable) iomem cookie. It might be a PIO
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* access or a MMIO access, these functions don't care. The info is
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* encoded in the hardware mapping set up by the mapping functions
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* (or the cookie itself, depending on implementation and hw).
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*
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* The generic routines don't assume any hardware mappings, and just
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* encode the PIO/MMIO as part of the cookie. They coldly assume that
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* the MMIO IO mappings are not in the low address range.
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*
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* Architectures for which this is not true can't use this generic
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* implementation and should do their own copy.
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*/
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/*
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* We assume that all the low physical PIO addresses (0-0xffff) always
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* PIO. That means we can do some sanity checks on the low bits, and
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* don't need to just take things for granted.
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*/
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#define PIO_RESERVED 0x10000UL
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/*
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* Ugly macros are a way of life.
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*/
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#define IO_COND(addr, is_pio, is_mmio) do { \
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unsigned long port = (unsigned long __force)addr; \
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if (port >= PIO_RESERVED) { \
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is_mmio; \
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} else { \
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is_pio; \
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} \
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} while (0)
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static inline u8 ioread8(const volatile void __iomem *addr)
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{
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IO_COND(addr, return inb(port), return readb(addr));
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return 0xff;
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}
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static inline u16 ioread16(const volatile void __iomem *addr)
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{
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IO_COND(addr, return inw(port), return readw(addr));
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return 0xffff;
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}
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static inline u32 ioread32(const volatile void __iomem *addr)
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{
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IO_COND(addr, return inl(port), return readl(addr));
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return 0xffffffff;
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}
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static inline void iowrite8(u8 value, volatile void __iomem *addr)
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{
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IO_COND(addr, outb(value, port), writeb(value, addr));
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}
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static inline void iowrite16(u16 value, volatile void __iomem *addr)
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{
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IO_COND(addr, outw(value, port), writew(value, addr));
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}
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static inline void iowrite32(u32 value, volatile void __iomem *addr)
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{
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IO_COND(addr, outl(value, port), writel(value, addr));
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}
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#include <asm-generic/io.h>
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#endif /* _ASM_IO_H */
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