diff options
Diffstat (limited to 'include/asm-h8300/io.h')
| -rw-r--r-- | include/asm-h8300/io.h | 333 |
1 files changed, 333 insertions, 0 deletions
diff --git a/include/asm-h8300/io.h b/include/asm-h8300/io.h new file mode 100644 index 0000000..1773e37 --- /dev/null +++ b/include/asm-h8300/io.h @@ -0,0 +1,333 @@ +#ifndef _H8300_IO_H +#define _H8300_IO_H + +#ifdef __KERNEL__ + +#include <linux/config.h> +#include <asm/virtconvert.h> + +#if defined(CONFIG_H83007) || defined(CONFIG_H83068) +#include <asm/regs306x.h> +#elif defined(CONFIG_H8S2678) +#include <asm/regs267x.h> +#else +#error UNKNOWN CPU TYPE +#endif + + +/* + * These are for ISA/PCI shared memory _only_ and should never be used + * on any other type of memory, including Zorro memory. They are meant to + * access the bus in the bus byte order which is little-endian!. + * + * readX/writeX() are used to access memory mapped devices. On some + * architectures the memory mapped IO stuff needs to be accessed + * differently. On the m68k architecture, we just read/write the + * memory location directly. + */ +/* ++roman: The assignments to temp. vars avoid that gcc sometimes generates + * two accesses to memory, which may be undesireable for some devices. + */ + +/* + * swap functions are sometimes needed to interface little-endian hardware + */ + +static inline unsigned short _swapw(volatile unsigned short v) +{ +#ifndef H8300_IO_NOSWAP + unsigned short r; + __asm__("xor.b %w0,%x0\n\t" + "xor.b %x0,%w0\n\t" + "xor.b %w0,%x0" + :"=r"(r) + :"0"(v)); + return r; +#else + return v; +#endif +} + +static inline unsigned long _swapl(volatile unsigned long v) +{ +#ifndef H8300_IO_NOSWAP + unsigned long r; + __asm__("xor.b %w0,%x0\n\t" + "xor.b %x0,%w0\n\t" + "xor.b %w0,%x0\n\t" + "xor.w %e0,%f0\n\t" + "xor.w %f0,%e0\n\t" + "xor.w %e0,%f0\n\t" + "xor.b %w0,%x0\n\t" + "xor.b %x0,%w0\n\t" + "xor.b %w0,%x0" + :"=r"(r) + :"0"(v)); + return r; +#else + return v; +#endif +} + +#define readb(addr) \ + ({ unsigned char __v = \ + *(volatile unsigned char *)((unsigned long)(addr) & 0x00ffffff); \ + __v; }) +#define readw(addr) \ + ({ unsigned short __v = \ + *(volatile unsigned short *)((unsigned long)(addr) & 0x00ffffff); \ + __v; }) +#define readl(addr) \ + ({ unsigned long __v = \ + *(volatile unsigned long *)((unsigned long)(addr) & 0x00ffffff); \ + __v; }) + +#define writeb(b,addr) (void)((*(volatile unsigned char *) \ + ((unsigned long)(addr) & 0x00ffffff)) = (b)) +#define writew(b,addr) (void)((*(volatile unsigned short *) \ + ((unsigned long)(addr) & 0x00ffffff)) = (b)) +#define writel(b,addr) (void)((*(volatile unsigned long *) \ + ((unsigned long)(addr) & 0x00ffffff)) = (b)) +#define readb_relaxed(addr) readb(addr) +#define readw_relaxed(addr) readw(addr) +#define readl_relaxed(addr) readl(addr) + +#define __raw_readb readb +#define __raw_readw readw +#define __raw_readl readl +#define __raw_writeb writeb +#define __raw_writew writew +#define __raw_writel writel + +static inline int h8300_buswidth(unsigned int addr) +{ + return (*(volatile unsigned char *)ABWCR & (1 << ((addr >> 21) & 7))) == 0; +} + +static inline void io_outsb(unsigned int addr, const void *buf, int len) +{ + volatile unsigned char *ap_b = (volatile unsigned char *) addr; + volatile unsigned short *ap_w = (volatile unsigned short *) addr; + unsigned char *bp = (unsigned char *) buf; + + if(h8300_buswidth(addr) && (addr & 1)) { + while (len--) + *ap_w = *bp++; + } else { + while (len--) + *ap_b = *bp++; + } +} + +static inline void io_outsw(unsigned int addr, const void *buf, int len) +{ + volatile unsigned short *ap = (volatile unsigned short *) addr; + unsigned short *bp = (unsigned short *) buf; + while (len--) + *ap = _swapw(*bp++); +} + +static inline void io_outsl(unsigned int addr, const void *buf, int len) +{ + volatile unsigned long *ap = (volatile unsigned long *) addr; + unsigned long *bp = (unsigned long *) buf; + while (len--) + *ap = _swapl(*bp++); +} + +static inline void io_outsw_noswap(unsigned int addr, const void *buf, int len) +{ + volatile unsigned short *ap = (volatile unsigned short *) addr; + unsigned short *bp = (unsigned short *) buf; + while (len--) + *ap = *bp++; +} + +static inline void io_outsl_noswap(unsigned int addr, const void *buf, int len) +{ + volatile unsigned long *ap = (volatile unsigned long *) addr; + unsigned long *bp = (unsigned long *) buf; + while (len--) + *ap = *bp++; +} + +static inline void io_insb(unsigned int addr, void *buf, int len) +{ + volatile unsigned char *ap_b; + volatile unsigned short *ap_w; + unsigned char *bp = (unsigned char *) buf; + + if(h8300_buswidth(addr)) { + ap_w = (volatile unsigned short *)(addr & ~1); + while (len--) + *bp++ = *ap_w & 0xff; + } else { + ap_b = (volatile unsigned char *)addr; + while (len--) + *bp++ = *ap_b; + } +} + +static inline void io_insw(unsigned int addr, void *buf, int len) +{ + volatile unsigned short *ap = (volatile unsigned short *) addr; + unsigned short *bp = (unsigned short *) buf; + while (len--) + *bp++ = _swapw(*ap); +} + +static inline void io_insl(unsigned int addr, void *buf, int len) +{ + volatile unsigned long *ap = (volatile unsigned long *) addr; + unsigned long *bp = (unsigned long *) buf; + while (len--) + *bp++ = _swapl(*ap); +} + +static inline void io_insw_noswap(unsigned int addr, void *buf, int len) +{ + volatile unsigned short *ap = (volatile unsigned short *) addr; + unsigned short *bp = (unsigned short *) buf; + while (len--) + *bp++ = *ap; +} + +static inline void io_insl_noswap(unsigned int addr, void *buf, int len) +{ + volatile unsigned long *ap = (volatile unsigned long *) addr; + unsigned long *bp = (unsigned long *) buf; + while (len--) + *bp++ = *ap; +} + +/* + * make the short names macros so specific devices + * can override them as required + */ + +#define memset_io(a,b,c) memset((void *)(a),(b),(c)) +#define memcpy_fromio(a,b,c) memcpy((a),(void *)(b),(c)) +#define memcpy_toio(a,b,c) memcpy((void *)(a),(b),(c)) + +#define mmiowb() + +#define inb(addr) ((h8300_buswidth(addr))?readw((addr) & ~1) & 0xff:readb(addr)) +#define inw(addr) _swapw(readw(addr)) +#define inl(addr) _swapl(readl(addr)) +#define outb(x,addr) ((void)((h8300_buswidth(addr) && \ + ((addr) & 1))?writew(x,(addr) & ~1):writeb(x,addr))) +#define outw(x,addr) ((void) writew(_swapw(x),addr)) +#define outl(x,addr) ((void) writel(_swapl(x),addr)) + +#define inb_p(addr) inb(addr) +#define inw_p(addr) inw(addr) +#define inl_p(addr) inl(addr) +#define outb_p(x,addr) outb(x,addr) +#define outw_p(x,addr) outw(x,addr) +#define outl_p(x,addr) outl(x,addr) + +#define outsb(a,b,l) io_outsb(a,b,l) +#define outsw(a,b,l) io_outsw(a,b,l) +#define outsl(a,b,l) io_outsl(a,b,l) + +#define insb(a,b,l) io_insb(a,b,l) +#define insw(a,b,l) io_insw(a,b,l) +#define insl(a,b,l) io_insl(a,b,l) + +#define IO_SPACE_LIMIT 0xffffff + + +/* Values for nocacheflag and cmode */ +#define IOMAP_FULL_CACHING 0 +#define IOMAP_NOCACHE_SER 1 +#define IOMAP_NOCACHE_NONSER 2 +#define IOMAP_WRITETHROUGH 3 + +extern void *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag); +extern void __iounmap(void *addr, unsigned long size); + +static inline void *ioremap(unsigned long physaddr, unsigned long size) +{ + return __ioremap(physaddr, size, IOMAP_NOCACHE_SER); +} +static inline void *ioremap_nocache(unsigned long physaddr, unsigned long size) +{ + return __ioremap(physaddr, size, IOMAP_NOCACHE_SER); +} +static inline void *ioremap_writethrough(unsigned long physaddr, unsigned long size) +{ + return __ioremap(physaddr, size, IOMAP_WRITETHROUGH); +} +static inline void *ioremap_fullcache(unsigned long physaddr, unsigned long size) +{ + return __ioremap(physaddr, size, IOMAP_FULL_CACHING); +} + +extern void iounmap(void *addr); + +/* Nothing to do */ + +#define dma_cache_inv(_start,_size) do { } while (0) +#define dma_cache_wback(_start,_size) do { } while (0) +#define dma_cache_wback_inv(_start,_size) do { } while (0) + +/* H8/300 internal I/O functions */ +static __inline__ unsigned char ctrl_inb(unsigned long addr) +{ + return *(volatile unsigned char*)addr; +} + +static __inline__ unsigned short ctrl_inw(unsigned long addr) +{ + return *(volatile unsigned short*)addr; +} + +static __inline__ unsigned long ctrl_inl(unsigned long addr) +{ + return *(volatile unsigned long*)addr; +} + +static __inline__ void ctrl_outb(unsigned char b, unsigned long addr) +{ + *(volatile unsigned char*)addr = b; +} + +static __inline__ void ctrl_outw(unsigned short b, unsigned long addr) +{ + *(volatile unsigned short*)addr = b; +} + +static __inline__ void ctrl_outl(unsigned long b, unsigned long addr) +{ + *(volatile unsigned long*)addr = b; +} + +/* Pages to physical address... */ +#define page_to_phys(page) ((page - mem_map) << PAGE_SHIFT) +#define page_to_bus(page) ((page - mem_map) << PAGE_SHIFT) + +/* + * Macros used for converting between virtual and physical mappings. + */ +#define mm_ptov(vaddr) ((void *) (vaddr)) +#define mm_vtop(vaddr) ((unsigned long) (vaddr)) +#define phys_to_virt(vaddr) ((void *) (vaddr)) +#define virt_to_phys(vaddr) ((unsigned long) (vaddr)) + +#define virt_to_bus virt_to_phys +#define bus_to_virt phys_to_virt + +/* + * Convert a physical pointer to a virtual kernel pointer for /dev/mem + * access + */ +#define xlate_dev_mem_ptr(p) __va(p) + +/* + * Convert a virtual cached pointer to an uncached pointer + */ +#define xlate_dev_kmem_ptr(p) p + +#endif /* __KERNEL__ */ + +#endif /* _H8300_IO_H */ |