mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-06 13:14:27 +00:00
401d1c4f5d
Move this out of the common header and include it only where needed. In a number of cases this requires adding "struct udevice;" to avoid adding another large header or in other cases replacing / adding missing header files that had been pulled in, very indirectly. Finally, we have a few cases where we did not need to include <asm/global_data.h> at all, so remove that include. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Tom Rini <trini@konsulko.com>
312 lines
9.3 KiB
C
312 lines
9.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
/*
|
|
* (C) Copyright 2000-2002
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
*/
|
|
|
|
#ifndef _ASM_IO_H
|
|
#define _ASM_IO_H
|
|
|
|
#include <compiler.h>
|
|
|
|
/*
|
|
* This file contains the definitions for the x86 IO instructions
|
|
* inb/inw/inl/outb/outw/outl and the "string versions" of the same
|
|
* (insb/insw/insl/outsb/outsw/outsl). You can also use "pausing"
|
|
* versions of the single-IO instructions (inb_p/inw_p/..).
|
|
*
|
|
* This file is not meant to be obfuscating: it's just complicated
|
|
* to (a) handle it all in a way that makes gcc able to optimize it
|
|
* as well as possible and (b) trying to avoid writing the same thing
|
|
* over and over again with slight variations and possibly making a
|
|
* mistake somewhere.
|
|
*/
|
|
|
|
/*
|
|
* Thanks to James van Artsdalen for a better timing-fix than
|
|
* the two short jumps: using outb's to a nonexistent port seems
|
|
* to guarantee better timings even on fast machines.
|
|
*
|
|
* On the other hand, I'd like to be sure of a non-existent port:
|
|
* I feel a bit unsafe about using 0x80 (should be safe, though)
|
|
*
|
|
* Linus
|
|
*/
|
|
|
|
/*
|
|
* Bit simplified and optimized by Jan Hubicka
|
|
* Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999.
|
|
*
|
|
* isa_memset_io, isa_memcpy_fromio, isa_memcpy_toio added,
|
|
* isa_read[wl] and isa_write[wl] fixed
|
|
* - Arnaldo Carvalho de Melo <acme@conectiva.com.br>
|
|
*/
|
|
|
|
#define IO_SPACE_LIMIT 0xffff
|
|
|
|
#include <asm/types.h>
|
|
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
|
|
/*
|
|
* readX/writeX() are used to access memory mapped devices. On some
|
|
* architectures the memory mapped IO stuff needs to be accessed
|
|
* differently. On the x86 architecture, we just read/write the
|
|
* memory location directly.
|
|
*/
|
|
|
|
#define readb(addr) (*(volatile u8 *)(uintptr_t)(addr))
|
|
#define readw(addr) (*(volatile u16 *)(uintptr_t)(addr))
|
|
#define readl(addr) (*(volatile u32 *)(uintptr_t)(addr))
|
|
#define readq(addr) (*(volatile u64 *)(uintptr_t)(addr))
|
|
#define __raw_readb readb
|
|
#define __raw_readw readw
|
|
#define __raw_readl readl
|
|
#define __raw_readq readq
|
|
|
|
#define writeb(b, addr) (*(volatile u8 *)(addr) = (b))
|
|
#define writew(b, addr) (*(volatile u16 *)(addr) = (b))
|
|
#define writel(b, addr) (*(volatile u32 *)(addr) = (b))
|
|
#define writeq(b, addr) (*(volatile u64 *)(addr) = (b))
|
|
#define __raw_writeb writeb
|
|
#define __raw_writew writew
|
|
#define __raw_writel writel
|
|
#define __raw_writeq writeq
|
|
|
|
#define memset_io(a,b,c) memset((a),(b),(c))
|
|
#define memcpy_fromio(a,b,c) memcpy((a),(b),(c))
|
|
#define memcpy_toio(a,b,c) memcpy((a),(b),(c))
|
|
|
|
#define out_arch(type, endian, a, v) __raw_write##type(cpu_to_##endian(v), a)
|
|
#define in_arch(type, endian, a) endian##_to_cpu(__raw_read##type(a))
|
|
|
|
#define out_le64(a, v) out_arch(q, le64, a, v)
|
|
#define out_le32(a, v) out_arch(l, le32, a, v)
|
|
#define out_le16(a, v) out_arch(w, le16, a, v)
|
|
|
|
#define in_le64(a) in_arch(q, le64, a)
|
|
#define in_le32(a) in_arch(l, le32, a)
|
|
#define in_le16(a) in_arch(w, le16, a)
|
|
|
|
#define out_be32(a, v) out_arch(l, be32, a, v)
|
|
#define out_be16(a, v) out_arch(w, be16, a, v)
|
|
|
|
#define in_be32(a) in_arch(l, be32, a)
|
|
#define in_be16(a) in_arch(w, be16, a)
|
|
|
|
#define out_8(a, v) __raw_writeb(v, a)
|
|
#define in_8(a) __raw_readb(a)
|
|
|
|
#define clrbits(type, addr, clear) \
|
|
out_##type((addr), in_##type(addr) & ~(clear))
|
|
|
|
#define setbits(type, addr, set) \
|
|
out_##type((addr), in_##type(addr) | (set))
|
|
|
|
#define clrsetbits(type, addr, clear, set) \
|
|
out_##type((addr), (in_##type(addr) & ~(clear)) | (set))
|
|
|
|
#define clrbits_be32(addr, clear) clrbits(be32, addr, clear)
|
|
#define setbits_be32(addr, set) setbits(be32, addr, set)
|
|
#define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set)
|
|
|
|
#define clrbits_le32(addr, clear) clrbits(le32, addr, clear)
|
|
#define setbits_le32(addr, set) setbits(le32, addr, set)
|
|
#define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set)
|
|
|
|
#define clrbits_be16(addr, clear) clrbits(be16, addr, clear)
|
|
#define setbits_be16(addr, set) setbits(be16, addr, set)
|
|
#define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set)
|
|
|
|
#define clrbits_le16(addr, clear) clrbits(le16, addr, clear)
|
|
#define setbits_le16(addr, set) setbits(le16, addr, set)
|
|
#define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set)
|
|
|
|
#define clrbits_8(addr, clear) clrbits(8, addr, clear)
|
|
#define setbits_8(addr, set) setbits(8, addr, set)
|
|
#define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set)
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#ifdef SLOW_IO_BY_JUMPING
|
|
#define __SLOW_DOWN_IO "\njmp 1f\n1:\tjmp 1f\n1:"
|
|
#else
|
|
#define __SLOW_DOWN_IO "\noutb %%al,$0xed"
|
|
#endif
|
|
|
|
#ifdef REALLY_SLOW_IO
|
|
#define __FULL_SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO
|
|
#else
|
|
#define __FULL_SLOW_DOWN_IO __SLOW_DOWN_IO
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Talk about misusing macros..
|
|
*/
|
|
#define __OUT1(s,x) \
|
|
static inline void _out##s(unsigned x value, unsigned short port) {
|
|
|
|
#define __OUT2(s,s1,s2) \
|
|
__asm__ __volatile__ ("out" #s " %" s1 "0,%" s2 "1"
|
|
|
|
|
|
#define __OUT(s,s1,x) \
|
|
__OUT1(s,x) __OUT2(s,s1,"w") : : "a" (value), "Nd" (port)); } \
|
|
__OUT1(s##_p,x) __OUT2(s,s1,"w") __FULL_SLOW_DOWN_IO : : "a" (value), "Nd" (port));}
|
|
|
|
#define __IN1(s) \
|
|
static inline RETURN_TYPE _in##s(unsigned short port) { RETURN_TYPE _v;
|
|
|
|
#define __IN2(s,s1,s2) \
|
|
__asm__ __volatile__ ("in" #s " %" s2 "1,%" s1 "0"
|
|
|
|
#define __IN(s,s1,i...) \
|
|
__IN1(s) __IN2(s,s1,"w") : "=a" (_v) : "Nd" (port) ,##i ); return _v; } \
|
|
__IN1(s##_p) __IN2(s,s1,"w") __FULL_SLOW_DOWN_IO : "=a" (_v) : "Nd" (port) ,##i ); return _v; }
|
|
|
|
#define __INS(s) \
|
|
static inline void ins##s(unsigned short port, void * addr, unsigned long count) \
|
|
{ __asm__ __volatile__ ("rep ; ins" #s \
|
|
: "=D" (addr), "=c" (count) : "d" (port),"0" (addr),"1" (count)); }
|
|
|
|
#define __OUTS(s) \
|
|
static inline void outs##s(unsigned short port, const void * addr, unsigned long count) \
|
|
{ __asm__ __volatile__ ("rep ; outs" #s \
|
|
: "=S" (addr), "=c" (count) : "d" (port),"0" (addr),"1" (count)); }
|
|
|
|
#define RETURN_TYPE unsigned char
|
|
__IN(b,"")
|
|
#undef RETURN_TYPE
|
|
#define RETURN_TYPE unsigned short
|
|
__IN(w,"")
|
|
#undef RETURN_TYPE
|
|
#define RETURN_TYPE unsigned int
|
|
__IN(l,"")
|
|
#undef RETURN_TYPE
|
|
|
|
#define inb(port) _inb((uintptr_t)(port))
|
|
#define inw(port) _inw((uintptr_t)(port))
|
|
#define inl(port) _inl((uintptr_t)(port))
|
|
|
|
__OUT(b,"b",char)
|
|
__OUT(w,"w",short)
|
|
__OUT(l,,int)
|
|
|
|
#define outb(val, port) _outb(val, (uintptr_t)(port))
|
|
#define outw(val, port) _outw(val, (uintptr_t)(port))
|
|
#define outl(val, port) _outl(val, (uintptr_t)(port))
|
|
|
|
__INS(b)
|
|
__INS(w)
|
|
__INS(l)
|
|
|
|
__OUTS(b)
|
|
__OUTS(w)
|
|
__OUTS(l)
|
|
|
|
/* IO space accessors */
|
|
#define clrio(type, addr, clear) \
|
|
out##type(in##type(addr) & ~(clear), (addr))
|
|
|
|
#define setio(type, addr, set) \
|
|
out##type(in##type(addr) | (set), (addr))
|
|
|
|
#define clrsetio(type, addr, clear, set) \
|
|
out##type((in##type(addr) & ~(clear)) | (set), (addr))
|
|
|
|
#define clrio_32(addr, clear) clrio(l, addr, clear)
|
|
#define clrio_16(addr, clear) clrio(w, addr, clear)
|
|
#define clrio_8(addr, clear) clrio(b, addr, clear)
|
|
|
|
#define setio_32(addr, set) setio(l, addr, set)
|
|
#define setio_16(addr, set) setio(w, addr, set)
|
|
#define setio_8(addr, set) setio(b, addr, set)
|
|
|
|
#define clrsetio_32(addr, clear, set) clrsetio(l, addr, clear, set)
|
|
#define clrsetio_16(addr, clear, set) clrsetio(w, addr, clear, set)
|
|
#define clrsetio_8(addr, clear, set) clrsetio(b, addr, clear, set)
|
|
|
|
static inline void sync(void)
|
|
{
|
|
}
|
|
|
|
/*
|
|
* TODO: The kernel offers some more advanced versions of barriers, it might
|
|
* have some advantages to use them instead of the simple one here.
|
|
*/
|
|
#define dmb() __asm__ __volatile__ ("" : : : "memory")
|
|
#define __iormb() dmb()
|
|
#define __iowmb() dmb()
|
|
|
|
/*
|
|
* Read/write from/to an (offsettable) iomem cookie. It might be a PIO
|
|
* access or a MMIO access, these functions don't care. The info is
|
|
* encoded in the hardware mapping set up by the mapping functions
|
|
* (or the cookie itself, depending on implementation and hw).
|
|
*
|
|
* The generic routines don't assume any hardware mappings, and just
|
|
* encode the PIO/MMIO as part of the cookie. They coldly assume that
|
|
* the MMIO IO mappings are not in the low address range.
|
|
*
|
|
* Architectures for which this is not true can't use this generic
|
|
* implementation and should do their own copy.
|
|
*/
|
|
|
|
/*
|
|
* We assume that all the low physical PIO addresses (0-0xffff) always
|
|
* PIO. That means we can do some sanity checks on the low bits, and
|
|
* don't need to just take things for granted.
|
|
*/
|
|
#define PIO_RESERVED 0x10000UL
|
|
|
|
/*
|
|
* Ugly macros are a way of life.
|
|
*/
|
|
#define IO_COND(addr, is_pio, is_mmio) do { \
|
|
unsigned long port = (unsigned long __force)addr; \
|
|
if (port >= PIO_RESERVED) { \
|
|
is_mmio; \
|
|
} else { \
|
|
is_pio; \
|
|
} \
|
|
} while (0)
|
|
|
|
static inline u8 ioread8(const volatile void __iomem *addr)
|
|
{
|
|
IO_COND(addr, return inb(port), return readb(addr));
|
|
return 0xff;
|
|
}
|
|
|
|
static inline u16 ioread16(const volatile void __iomem *addr)
|
|
{
|
|
IO_COND(addr, return inw(port), return readw(addr));
|
|
return 0xffff;
|
|
}
|
|
|
|
static inline u32 ioread32(const volatile void __iomem *addr)
|
|
{
|
|
IO_COND(addr, return inl(port), return readl(addr));
|
|
return 0xffffffff;
|
|
}
|
|
|
|
static inline void iowrite8(u8 value, volatile void __iomem *addr)
|
|
{
|
|
IO_COND(addr, outb(value, port), writeb(value, addr));
|
|
}
|
|
|
|
static inline void iowrite16(u16 value, volatile void __iomem *addr)
|
|
{
|
|
IO_COND(addr, outw(value, port), writew(value, addr));
|
|
}
|
|
|
|
static inline void iowrite32(u32 value, volatile void __iomem *addr)
|
|
{
|
|
IO_COND(addr, outl(value, port), writel(value, addr));
|
|
}
|
|
|
|
#include <asm-generic/io.h>
|
|
|
|
#endif /* _ASM_IO_H */
|