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Diffstat (limited to 'target/linux/ubicom32/files/arch/ubicom32/include/asm/io.h')
| -rw-r--r-- | target/linux/ubicom32/files/arch/ubicom32/include/asm/io.h | 313 |
1 files changed, 313 insertions, 0 deletions
diff --git a/target/linux/ubicom32/files/arch/ubicom32/include/asm/io.h b/target/linux/ubicom32/files/arch/ubicom32/include/asm/io.h new file mode 100644 index 000000000..ad526a338 --- /dev/null +++ b/target/linux/ubicom32/files/arch/ubicom32/include/asm/io.h @@ -0,0 +1,313 @@ +/* + * arch/ubicom32/include/asm/io.h + * I/O memory accessor functions for Ubicom32 architecture. + * + * (C) Copyright 2009, Ubicom, Inc. + * + * This file is part of the Ubicom32 Linux Kernel Port. + * + * The Ubicom32 Linux Kernel Port is free software: you can redistribute + * it and/or modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, either version 2 of the + * License, or (at your option) any later version. + * + * The Ubicom32 Linux Kernel Port is distributed in the hope that it + * will be useful, but WITHOUT ANY WARRANTY; without even the implied + * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See + * the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with the Ubicom32 Linux Kernel Port. If not, + * see <http://www.gnu.org/licenses/>. + * + * Ubicom32 implementation derived from (with many thanks): + * arch/m68knommu + * arch/blackfin + * arch/parisc + */ +#ifndef _ASM_UBICOM32_IO_H +#define _ASM_UBICOM32_IO_H + +#ifdef __KERNEL__ +#include <linux/string.h> +#include <linux/compiler.h> + +static inline unsigned short _swapw(volatile unsigned short v) +{ + return ((v << 8) | (v >> 8)); +} + +static inline unsigned int _swapl(volatile unsigned long v) +{ + return ((v << 24) | ((v & 0xff00) << 8) | ((v & 0xff0000) >> 8) | (v >> 24)); +} + +#ifndef CONFIG_PCI +#define readb(addr) \ + ({ unsigned char __v = (*(volatile unsigned char *) (addr)); __v; }) +#define readw(addr) \ + ({ unsigned short __v = (*(volatile unsigned short *) (addr)); __v; }) +#define readl(addr) \ + ({ unsigned int __v = (*(volatile unsigned int *) (addr)); __v; }) + +#define writeb(b,addr) (void)((*(volatile unsigned char *) (addr)) = (b)) +#define writew(b,addr) (void)((*(volatile unsigned short *) (addr)) = (b)) +#define writel(b,addr) (void)((*(volatile unsigned int *) (addr)) = (b)) +#else /*CONFIG_PCI */ + +#define PCI_CPU_REG_BASE (0x00000000UL) /* taking lower 2GB space */ +#define PCI_DEV_REG_BASE (0x80000000UL) + +#if PCI_CPU_REG_BASE > PCI_DEV_REG_BASE +#define IS_PCI_ADDRESS(x) (((unsigned int)(x)&(PCI_CPU_REG_BASE)) == 0) +#else +#define IS_PCI_ADDRESS(x) ((unsigned int)(x)&(PCI_DEV_REG_BASE)) +#endif + +extern unsigned int ubi32_pci_read_u32(const volatile void __iomem *addr); +extern unsigned short ubi32_pci_read_u16(const volatile void __iomem *addr); +extern unsigned char ubi32_pci_read_u8(const volatile void __iomem *addr); +extern void ubi32_pci_write_u32(unsigned int val, const volatile void __iomem *addr); +extern void ubi32_pci_write_u16(unsigned short val, const volatile void __iomem *addr); +extern void ubi32_pci_write_u8(unsigned char val, const volatile void __iomem *addr); + +static inline unsigned char readb(const volatile void __iomem *addr) +{ + if (IS_PCI_ADDRESS(addr)) + return ubi32_pci_read_u8(addr); + else + return (unsigned char)(*(volatile unsigned char *)addr); +} +static inline unsigned short readw(const volatile void __iomem *addr) +{ + if (IS_PCI_ADDRESS(addr)) + return ubi32_pci_read_u16(addr); + else + return (unsigned short)(*(volatile unsigned short *)addr); +} + +static inline unsigned int readl(const volatile void __iomem *addr) +{ + if (IS_PCI_ADDRESS(addr)) + return ubi32_pci_read_u32(addr); + else + return (unsigned int)(*(volatile unsigned int *)addr); +} + +static inline void writel(unsigned int val, volatile void __iomem *addr) +{ + if (IS_PCI_ADDRESS(addr)) + ubi32_pci_write_u32(val, addr); + else + *(volatile unsigned int *)addr = val; +} + +static inline void writew(unsigned short val, volatile void __iomem *addr) +{ + if (IS_PCI_ADDRESS(addr)) + ubi32_pci_write_u16(val, addr); + else + *(volatile unsigned short *)addr = val; +} + +static inline void writeb(unsigned char val, volatile void __iomem *addr) +{ + if (IS_PCI_ADDRESS(addr)) + ubi32_pci_write_u8(val, addr); + else + *(volatile unsigned char *)addr = val; +} +#endif + +#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 void io_outsb(unsigned int addr, const void *buf, int len) +{ + volatile unsigned char *ap = (volatile unsigned char *) addr; + unsigned char *bp = (unsigned char *) buf; + while (len--) + *ap = *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 int *ap = (volatile unsigned int *) addr; + unsigned int *bp = (unsigned int *) buf; + while (len--) + *ap = _swapl(*bp++); +} + +static inline void io_insb(unsigned int addr, void *buf, int len) +{ + volatile unsigned char *ap = (volatile unsigned char *) addr; + unsigned char *bp = (unsigned char *) buf; + while (len--) + *bp++ = *ap; +} + +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 int *ap = (volatile unsigned int *) addr; + unsigned int *bp = (unsigned int *) buf; + while (len--) + *bp++ = _swapl(*ap); +} + +#define mmiowb() + +/* + * make the short names macros so specific devices + * can override them as required + */ +#ifndef CONFIG_PCI +#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)) +#else +extern void memcpy_fromio(void *to, const volatile void __iomem *from, unsigned len); +extern void memcpy_toio(volatile void __iomem *to, const void *from, unsigned len); +extern void memset_io(volatile void __iomem *addr, int val, size_t count); +#endif + +#define inb(addr) readb(addr) +#define inw(addr) readw(addr) +#define inl(addr) readl(addr) +#define outb(x,addr) ((void) writeb(x,addr)) +#define outw(x,addr) ((void) writew(x,addr)) +#define outl(x,addr) ((void) writel(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) + +#ifndef CONFIG_PCI +#define ioread8_rep(a,d,c) insb(a,d,c) +#define ioread16_rep(a,d,c) insw(a,d,c) +#define ioread32_rep(a,d,c) insl(a,d,c) +#define iowrite8_rep(a,s,c) outsb(a,s,c) +#define iowrite16_rep(a,s,c) outsw(a,s,c) +#define iowrite32_rep(a,s,c) outsl(a,s,c) +#else +extern void ioread8_rep(void __iomem *port, void *buf, unsigned long count); +extern void ioread16_rep(void __iomem *port, void *buf, unsigned long count); +extern void ioread32_rep(void __iomem *port, void *buf, unsigned long count); +extern void iowrite8_rep(void __iomem *port, const void *buf, unsigned long count); +extern void iowrite16_rep(void __iomem *port, const void *buf, unsigned long count); +extern void iowrite32_rep(void __iomem *port, const void *buf, unsigned long count); +#endif + + +#ifndef CONFIG_PCI +#define ioread8(X) readb(X) +#define ioread16(X) readw(X) +#define ioread32(X) readl(X) +#define iowrite8(val,X) writeb(val,X) +#define iowrite16(val,X) writew(val,X) +#define iowrite32(val,X) writel(val,X) +#else /*CONFIG_PCI */ +extern unsigned char ioread8(void __iomem *addr); +extern unsigned short ioread16(void __iomem *addr); +extern unsigned int ioread32(void __iomem *addr); +extern void iowrite8(unsigned char val, void __iomem *addr); +extern void iowrite16(unsigned short val, void __iomem *addr); +extern void iowrite32(unsigned int val, void __iomem *addr); +#endif /* CONFIG_PCI */ + +#define IO_SPACE_LIMIT 0xffff + +/* 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); + +#define ioport_map(port, nr) ((void __iomem*)(port)) +#define ioport_unmap(addr) + + +/* 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 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 /* _ASM_UBICOM32_IO_H */ |