diff options
Diffstat (limited to 'include/asm-arm/io.h')
| -rw-r--r-- | include/asm-arm/io.h | 65 |
1 files changed, 38 insertions, 27 deletions
diff --git a/include/asm-arm/io.h b/include/asm-arm/io.h index 0d55ca2..122419f 100644 --- a/include/asm-arm/io.h +++ b/include/asm-arm/io.h @@ -71,22 +71,37 @@ extern void __raw_readsl(unsigned int addr, void *data, int longlen); #include <asm/arch/io.h> /* - * IO definitions. We define {out,in,outs,ins}[bwl] if __io is defined - * by the machine. Otherwise, these definitions are left for the machine - * specific header files to pick up. + * IO port access primitives + * ------------------------- + * + * The ARM doesn't have special IO access instructions; all IO is memory + * mapped. Note that these are defined to perform little endian accesses + * only. Their primary purpose is to access PCI and ISA peripherals. + * + * Note that for a big endian machine, this implies that the following + * big endian mode connectivity is in place, as described by numerious + * ARM documents: + * + * PCI: D0-D7 D8-D15 D16-D23 D24-D31 + * ARM: D24-D31 D16-D23 D8-D15 D0-D7 + * + * The machine specific io.h include defines __io to translate an "IO" + * address to a memory address. * * Note that we prevent GCC re-ordering or caching values in expressions * by introducing sequence points into the in*() definitions. Note that * __raw_* do not guarantee this behaviour. + * + * The {in,out}[bwl] macros are for emulating x86-style PCI/ISA IO space. */ #ifdef __io #define outb(v,p) __raw_writeb(v,__io(p)) -#define outw(v,p) __raw_writew(v,__io(p)) -#define outl(v,p) __raw_writel(v,__io(p)) +#define outw(v,p) __raw_writew(cpu_to_le16(v),__io(p)) +#define outl(v,p) __raw_writel(cpu_to_le32(v),__io(p)) -#define inb(p) ({ unsigned int __v = __raw_readb(__io(p)); __v; }) -#define inw(p) ({ unsigned int __v = __raw_readw(__io(p)); __v; }) -#define inl(p) ({ unsigned int __v = __raw_readl(__io(p)); __v; }) +#define inb(p) ({ unsigned int __v = __raw_readb(__io(p)); __v; }) +#define inw(p) ({ unsigned int __v = le16_to_cpu(__raw_readw(__io(p))); __v; }) +#define inl(p) ({ unsigned int __v = le32_to_cpu(__raw_readl(__io(p))); __v; }) #define outsb(p,d,l) __raw_writesb(__io(p),d,l) #define outsw(p,d,l) __raw_writesw(__io(p),d,l) @@ -171,20 +186,20 @@ extern void __readwrite_bug(const char *fn); */ #ifdef __mem_pci -#define readb(addr) ({ unsigned int __v = __raw_readb(__mem_pci(addr)); __v; }) -#define readw(addr) ({ unsigned int __v = __raw_readw(__mem_pci(addr)); __v; }) -#define readl(addr) ({ unsigned int __v = __raw_readl(__mem_pci(addr)); __v; }) +#define readb(c) ({ unsigned int __v = __raw_readb(__mem_pci(c)); __v; }) +#define readw(c) ({ unsigned int __v = le16_to_cpu(__raw_readw(__mem_pci(c))); __v; }) +#define readl(c) ({ unsigned int __v = le32_to_cpu(__raw_readl(__mem_pci(c))); __v; }) -#define writeb(val,addr) __raw_writeb(val,__mem_pci(addr)) -#define writew(val,addr) __raw_writew(val,__mem_pci(addr)) -#define writel(val,addr) __raw_writel(val,__mem_pci(addr)) +#define writeb(v,c) __raw_writeb(v,__mem_pci(c)) +#define writew(v,c) __raw_writew(cpu_to_le16(v),__mem_pci(c)) +#define writel(v,c) __raw_writel(cpu_to_le32(v),__mem_pci(c)) -#define memset_io(a,b,c) _memset_io(__mem_pci(a),(b),(c)) -#define memcpy_fromio(a,b,c) _memcpy_fromio((a),__mem_pci(b),(c)) -#define memcpy_toio(a,b,c) _memcpy_toio(__mem_pci(a),(b),(c)) +#define memset_io(c,v,l) _memset_io(__mem_pci(c),(v),(l)) +#define memcpy_fromio(a,c,l) _memcpy_fromio((a),__mem_pci(c),(l)) +#define memcpy_toio(c,a,l) _memcpy_toio(__mem_pci(c),(a),(l)) -#define eth_io_copy_and_sum(a,b,c,d) \ - eth_copy_and_sum((a),__mem_pci(b),(c),(d)) +#define eth_io_copy_and_sum(s,c,l,b) \ + eth_copy_and_sum((s),__mem_pci(c),(l),(b)) static inline int check_signature(unsigned long io_addr, const unsigned char *signature, @@ -219,14 +234,6 @@ out: #endif /* __mem_pci */ /* - * remap a physical address `phys' of size `size' with page protection `prot' - * into virtual address `from' - */ -#define io_remap_page_range(from,phys,size,prot) \ - remap_page_range(from,phys,size,prot) - - -/* * If this architecture has ISA IO, then define the isa_read/isa_write * macros. */ @@ -245,6 +252,10 @@ out: #define isa_eth_io_copy_and_sum(a,b,c,d) \ eth_copy_and_sum((a),__mem_isa(b),(c),(d)) +#ifndef PCI_MEMORY_VADDR /* XXX problem not understood -- wd */ +#define PCI_MEMORY_VADDR 0 +#endif /* XXX */ + static inline int isa_check_signature(unsigned long io_addr, const unsigned char *signature, int length) |