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![Måns Rullgård](/assets/img/avatar_default.png)
A number of headers define functions as "extern inline" which is causing problems with gcc5. The reason is that starting with version 5.1, gcc defaults to the standard C99 semantics for the inline keyword. Under the traditional GNU inline semantics, an "extern inline" function would never create an external definition, the same as inline *without* extern in C99. In C99, and "extern inline" definition is simply an external definition with an inline hint. In short, the meanings of inline with and without extern are swapped between GNU and C99. The upshot is that all these definitions in header files create an external definition wherever those headers are included, resulting in multiple definition errors at link time. Changing all these functions to "static inline" fixes the problem since this works as desired in all gcc versions. Although the semantics are slightly different (a static inline definition may result in an actual function being emitted), it works as intended in practice. This patch also removes extern prototype declarations for the changed functions where they existed. Signed-off-by: Mans Rullgard <mans@mansr.com>
286 lines
7.6 KiB
C
286 lines
7.6 KiB
C
/*
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* IO header file
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*
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* Copyright (C) 2004-2007, 2012 Freescale Semiconductor, Inc.
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* TsiChung Liew (Tsi-Chung.Liew@freescale.com)
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef __ASM_M68K_IO_H__
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#define __ASM_M68K_IO_H__
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#include <asm/byteorder.h>
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#ifndef _IO_BASE
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#define _IO_BASE 0
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#endif
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#define __raw_readb(addr) (*(volatile u8 *)(addr))
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#define __raw_readw(addr) (*(volatile u16 *)(addr))
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#define __raw_readl(addr) (*(volatile u32 *)(addr))
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#define __raw_writeb(b,addr) ((*(volatile u8 *) (addr)) = (b))
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#define __raw_writew(w,addr) ((*(volatile u16 *) (addr)) = (w))
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#define __raw_writel(l,addr) ((*(volatile u32 *) (addr)) = (l))
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#define readb(addr) in_8((volatile u8 *)(addr))
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#define writeb(b,addr) out_8((volatile u8 *)(addr), (b))
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#if !defined(__BIG_ENDIAN)
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#define readw(addr) (*(volatile u16 *) (addr))
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#define readl(addr) (*(volatile u32 *) (addr))
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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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#else
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#define readw(addr) in_be16((volatile u16 *)(addr))
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#define readl(addr) in_be32((volatile u32 *)(addr))
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#define writew(b,addr) out_be16((volatile u16 *)(addr),(b))
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#define writel(b,addr) out_be32((volatile u32 *)(addr),(b))
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#endif
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/*
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* The insw/outsw/insl/outsl macros don't do byte-swapping.
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* They are only used in practice for transferring buffers which
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* are arrays of bytes, and byte-swapping is not appropriate in
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* that case. - paulus
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*/
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#define insb(port, buf, ns) _insb((u8 *)((port)+_IO_BASE), (buf), (ns))
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#define outsb(port, buf, ns) _outsb((u8 *)((port)+_IO_BASE), (buf), (ns))
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#define insw(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
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#define outsw(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
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#define insl(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
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#define outsl(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
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#define inb(port) in_8((u8 *)((port)+_IO_BASE))
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#define outb(val, port) out_8((u8 *)((port)+_IO_BASE), (val))
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#if !defined(__BIG_ENDIAN)
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#define inw(port) in_be16((u16 *)((port)+_IO_BASE))
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#define outw(val, port) out_be16((u16 *)((port)+_IO_BASE), (val))
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#define inl(port) in_be32((u32 *)((port)+_IO_BASE))
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#define outl(val, port) out_be32((u32 *)((port)+_IO_BASE), (val))
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#else
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#define inw(port) in_le16((u16 *)((port)+_IO_BASE))
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#define outw(val, port) out_le16((u16 *)((port)+_IO_BASE), (val))
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#define inl(port) in_le32((u32 *)((port)+_IO_BASE))
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#define outl(val, port) out_le32((u32 *)((port)+_IO_BASE), (val))
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#endif
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#define mb() __asm__ __volatile__ ("" : : : "memory")
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static inline void _insb(volatile u8 * port, void *buf, int ns)
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{
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u8 *data = (u8 *) buf;
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while (ns--)
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*data++ = *port;
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}
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static inline void _outsb(volatile u8 * port, const void *buf, int ns)
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{
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u8 *data = (u8 *) buf;
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while (ns--)
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*port = *data++;
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}
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static inline void _insw(volatile u16 * port, void *buf, int ns)
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{
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u16 *data = (u16 *) buf;
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while (ns--)
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*data++ = __sw16(*port);
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}
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static inline void _outsw(volatile u16 * port, const void *buf, int ns)
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{
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u16 *data = (u16 *) buf;
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while (ns--) {
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*port = __sw16(*data);
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data++;
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}
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}
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static inline void _insl(volatile u32 * port, void *buf, int nl)
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{
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u32 *data = (u32 *) buf;
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while (nl--)
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*data++ = __sw32(*port);
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}
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static inline void _outsl(volatile u32 * port, const void *buf, int nl)
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{
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u32 *data = (u32 *) buf;
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while (nl--) {
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*port = __sw32(*data);
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data++;
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}
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}
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static inline void _insw_ns(volatile u16 * port, void *buf, int ns)
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{
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u16 *data = (u16 *) buf;
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while (ns--)
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*data++ = *port;
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}
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static inline void _outsw_ns(volatile u16 * port, const void *buf, int ns)
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{
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u16 *data = (u16 *) buf;
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while (ns--) {
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*port = *data++;
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}
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}
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static inline void _insl_ns(volatile u32 * port, void *buf, int nl)
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{
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u32 *data = (u32 *) buf;
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while (nl--)
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*data++ = *port;
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}
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static inline void _outsl_ns(volatile u32 * port, const void *buf, int nl)
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{
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u32 *data = (u32 *) buf;
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while (nl--) {
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*port = *data;
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data++;
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}
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}
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/*
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* The *_ns versions below don't do byte-swapping.
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* Neither do the standard versions now, these are just here
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* for older code.
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*/
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#define insw_ns(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
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#define outsw_ns(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
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#define insl_ns(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
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#define outsl_ns(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
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#define IO_SPACE_LIMIT ~0
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/*
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* 8, 16 and 32 bit, big and little endian I/O operations, with barrier.
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*/
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static inline int in_8(volatile u8 * addr)
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{
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return (int)*addr;
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}
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static inline void out_8(volatile u8 * addr, int val)
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{
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*addr = (u8) val;
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}
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static inline int in_le16(volatile u16 * addr)
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{
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return __sw16(*addr);
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}
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static inline int in_be16(volatile u16 * addr)
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{
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return (*addr & 0xFFFF);
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}
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static inline void out_le16(volatile u16 * addr, int val)
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{
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*addr = __sw16(val);
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}
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static inline void out_be16(volatile u16 * addr, int val)
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{
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*addr = (u16) val;
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}
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static inline unsigned in_le32(volatile u32 * addr)
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{
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return __sw32(*addr);
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}
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static inline unsigned in_be32(volatile u32 * addr)
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{
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return (*addr);
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}
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static inline void out_le32(volatile unsigned *addr, int val)
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{
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*addr = __sw32(val);
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}
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static inline void out_be32(volatile unsigned *addr, int val)
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{
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*addr = val;
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}
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/* Clear and set bits in one shot. These macros can be used to clear and
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* set multiple bits in a register using a single call. These macros can
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* also be used to set a multiple-bit bit pattern using a mask, by
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* specifying the mask in the 'clear' parameter and the new bit pattern
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* in the 'set' parameter.
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*/
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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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static inline void sync(void)
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{
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/* This sync function is for PowerPC or other architecture instruction
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* ColdFire does not have this instruction. Dummy function, added for
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* compatibility (CFI driver)
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*/
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}
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/*
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* Given a physical address and a length, return a virtual address
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* that can be used to access the memory range with the caching
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* properties specified by "flags".
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*/
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#define MAP_NOCACHE (0)
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#define MAP_WRCOMBINE (0)
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#define MAP_WRBACK (0)
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#define MAP_WRTHROUGH (0)
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static inline void *map_physmem(phys_addr_t paddr, unsigned long len,
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unsigned long flags)
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{
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return (void *)paddr;
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}
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/*
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* Take down a mapping set up by map_physmem().
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*/
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static inline void unmap_physmem(void *vaddr, unsigned long flags)
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{
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}
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static inline phys_addr_t virt_to_phys(void * vaddr)
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{
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return (phys_addr_t)(vaddr);
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}
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#endif /* __ASM_M68K_IO_H__ */
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