io.h
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- /*
- * linux/include/asm-arm/arch-ixp4xx/io.h
- *
- * Author: Deepak Saxena <dsaxena@plexity.net>
- *
- * Copyright (C) 2002-2005 MontaVista Software, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
- #ifndef __ASM_ARM_ARCH_IO_H
- #define __ASM_ARM_ARCH_IO_H
- #include <asm/hardware.h>
- #define IO_SPACE_LIMIT 0xffff0000
- #define BIT(x) ((1)<<(x))
- extern int (*ixp4xx_pci_read)(u32 addr, u32 cmd, u32* data);
- extern int ixp4xx_pci_write(u32 addr, u32 cmd, u32 data);
- /*
- * IXP4xx provides two methods of accessing PCI memory space:
- *
- * 1) A direct mapped window from 0x48000000 to 0x4bffffff (64MB).
- * To access PCI via this space, we simply ioremap() the BAR
- * into the kernel and we can use the standard read[bwl]/write[bwl]
- * macros. This is the preffered method due to speed but it
- * limits the system to just 64MB of PCI memory. This can be
- * problamatic if using video cards and other memory-heavy
- * targets.
- *
- * 2) If > 64MB of memory space is required, the IXP4xx can be configured
- * to use indirect registers to access PCI (as we do below for I/O
- * transactions). This allows for up to 128MB (0x48000000 to 0x4fffffff)
- * of memory on the bus. The disadvantadge of this is that every
- * PCI access requires three local register accesses plus a spinlock,
- * but in some cases the performance hit is acceptable. In addition,
- * you cannot mmap() PCI devices in this case.
- *
- */
- #ifndef CONFIG_IXP4XX_INDIRECT_PCI
- #define __mem_pci(a) (a)
- #else
- #include <linux/mm.h>
- /*
- * In the case of using indirect PCI, we simply return the actual PCI
- * address and our read/write implementation use that to drive the
- * access registers. If something outside of PCI is ioremap'd, we
- * fallback to the default.
- */
- static inline void __iomem *
- __ixp4xx_ioremap(unsigned long addr, size_t size, unsigned long flags, unsigned long align)
- {
- extern void __iomem * __ioremap(unsigned long, size_t, unsigned long, unsigned long);
- if((addr < 0x48000000) || (addr > 0x4fffffff))
- return __ioremap(addr, size, flags, align);
- return (void *)addr;
- }
- static inline void
- __ixp4xx_iounmap(void __iomem *addr)
- {
- extern void __iounmap(void __iomem *addr);
- if ((u32)addr >= VMALLOC_START)
- __iounmap(addr);
- }
- #define __arch_ioremap(a, s, f, x) __ixp4xx_ioremap(a, s, f, x)
- #define __arch_iounmap(a) __ixp4xx_iounmap(a)
- #define writeb(p, v) __ixp4xx_writeb(p, v)
- #define writew(p, v) __ixp4xx_writew(p, v)
- #define writel(p, v) __ixp4xx_writel(p, v)
- #define writesb(p, v, l) __ixp4xx_writesb(p, v, l)
- #define writesw(p, v, l) __ixp4xx_writesw(p, v, l)
- #define writesl(p, v, l) __ixp4xx_writesl(p, v, l)
-
- #define readb(p) __ixp4xx_readb(p)
- #define readw(p) __ixp4xx_readw(p)
- #define readl(p) __ixp4xx_readl(p)
-
- #define readsb(p, v, l) __ixp4xx_readsb(p, v, l)
- #define readsw(p, v, l) __ixp4xx_readsw(p, v, l)
- #define readsl(p, v, l) __ixp4xx_readsl(p, v, l)
- static inline void
- __ixp4xx_writeb(u8 value, u32 addr)
- {
- u32 n, byte_enables, data;
- if (addr >= VMALLOC_START) {
- __raw_writeb(value, addr);
- return;
- }
- n = addr % 4;
- byte_enables = (0xf & ~BIT(n)) << IXP4XX_PCI_NP_CBE_BESL;
- data = value << (8*n);
- ixp4xx_pci_write(addr, byte_enables | NP_CMD_MEMWRITE, data);
- }
- static inline void
- __ixp4xx_writesb(u32 bus_addr, u8 *vaddr, int count)
- {
- while (count--)
- writeb(*vaddr++, bus_addr);
- }
- static inline void
- __ixp4xx_writew(u16 value, u32 addr)
- {
- u32 n, byte_enables, data;
- if (addr >= VMALLOC_START) {
- __raw_writew(value, addr);
- return;
- }
- n = addr % 4;
- byte_enables = (0xf & ~(BIT(n) | BIT(n+1))) << IXP4XX_PCI_NP_CBE_BESL;
- data = value << (8*n);
- ixp4xx_pci_write(addr, byte_enables | NP_CMD_MEMWRITE, data);
- }
- static inline void
- __ixp4xx_writesw(u32 bus_addr, u16 *vaddr, int count)
- {
- while (count--)
- writew(*vaddr++, bus_addr);
- }
- static inline void
- __ixp4xx_writel(u32 value, u32 addr)
- {
- if (addr >= VMALLOC_START) {
- __raw_writel(value, addr);
- return;
- }
- ixp4xx_pci_write(addr, NP_CMD_MEMWRITE, value);
- }
- static inline void
- __ixp4xx_writesl(u32 bus_addr, u32 *vaddr, int count)
- {
- while (count--)
- writel(*vaddr++, bus_addr);
- }
- static inline unsigned char
- __ixp4xx_readb(u32 addr)
- {
- u32 n, byte_enables, data;
- if (addr >= VMALLOC_START)
- return __raw_readb(addr);
- n = addr % 4;
- byte_enables = (0xf & ~BIT(n)) << IXP4XX_PCI_NP_CBE_BESL;
- if (ixp4xx_pci_read(addr, byte_enables | NP_CMD_MEMREAD, &data))
- return 0xff;
- return data >> (8*n);
- }
- static inline void
- __ixp4xx_readsb(u32 bus_addr, u8 *vaddr, u32 count)
- {
- while (count--)
- *vaddr++ = readb(bus_addr);
- }
- static inline unsigned short
- __ixp4xx_readw(u32 addr)
- {
- u32 n, byte_enables, data;
- if (addr >= VMALLOC_START)
- return __raw_readw(addr);
- n = addr % 4;
- byte_enables = (0xf & ~(BIT(n) | BIT(n+1))) << IXP4XX_PCI_NP_CBE_BESL;
- if (ixp4xx_pci_read(addr, byte_enables | NP_CMD_MEMREAD, &data))
- return 0xffff;
- return data>>(8*n);
- }
- static inline void
- __ixp4xx_readsw(u32 bus_addr, u16 *vaddr, u32 count)
- {
- while (count--)
- *vaddr++ = readw(bus_addr);
- }
- static inline unsigned long
- __ixp4xx_readl(u32 addr)
- {
- u32 data;
- if (addr >= VMALLOC_START)
- return __raw_readl(addr);
- if (ixp4xx_pci_read(addr, NP_CMD_MEMREAD, &data))
- return 0xffffffff;
- return data;
- }
- static inline void
- __ixp4xx_readsl(u32 bus_addr, u32 *vaddr, u32 count)
- {
- while (count--)
- *vaddr++ = readl(bus_addr);
- }
- /*
- * We can use the built-in functions b/c they end up calling writeb/readb
- */
- #define memset_io(c,v,l) _memset_io((c),(v),(l))
- #define memcpy_fromio(a,c,l) _memcpy_fromio((a),(c),(l))
- #define memcpy_toio(c,a,l) _memcpy_toio((c),(a),(l))
- #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 bus_addr, const unsigned char *signature,
- int length)
- {
- int retval = 0;
- do {
- if (readb(bus_addr) != *signature)
- goto out;
- bus_addr++;
- signature++;
- length--;
- } while (length);
- retval = 1;
- out:
- return retval;
- }
- #endif
- /*
- * IXP4xx does not have a transparent cpu -> PCI I/O translation
- * window. Instead, it has a set of registers that must be tweaked
- * with the proper byte lanes, command types, and address for the
- * transaction. This means that we need to override the default
- * I/O functions.
- */
- #define outb(p, v) __ixp4xx_outb(p, v)
- #define outw(p, v) __ixp4xx_outw(p, v)
- #define outl(p, v) __ixp4xx_outl(p, v)
-
- #define outsb(p, v, l) __ixp4xx_outsb(p, v, l)
- #define outsw(p, v, l) __ixp4xx_outsw(p, v, l)
- #define outsl(p, v, l) __ixp4xx_outsl(p, v, l)
- #define inb(p) __ixp4xx_inb(p)
- #define inw(p) __ixp4xx_inw(p)
- #define inl(p) __ixp4xx_inl(p)
- #define insb(p, v, l) __ixp4xx_insb(p, v, l)
- #define insw(p, v, l) __ixp4xx_insw(p, v, l)
- #define insl(p, v, l) __ixp4xx_insl(p, v, l)
- static inline void
- __ixp4xx_outb(u8 value, u32 addr)
- {
- u32 n, byte_enables, data;
- n = addr % 4;
- byte_enables = (0xf & ~BIT(n)) << IXP4XX_PCI_NP_CBE_BESL;
- data = value << (8*n);
- ixp4xx_pci_write(addr, byte_enables | NP_CMD_IOWRITE, data);
- }
- static inline void
- __ixp4xx_outsb(u32 io_addr, const u8 *vaddr, u32 count)
- {
- while (count--)
- outb(*vaddr++, io_addr);
- }
- static inline void
- __ixp4xx_outw(u16 value, u32 addr)
- {
- u32 n, byte_enables, data;
- n = addr % 4;
- byte_enables = (0xf & ~(BIT(n) | BIT(n+1))) << IXP4XX_PCI_NP_CBE_BESL;
- data = value << (8*n);
- ixp4xx_pci_write(addr, byte_enables | NP_CMD_IOWRITE, data);
- }
- static inline void
- __ixp4xx_outsw(u32 io_addr, const u16 *vaddr, u32 count)
- {
- while (count--)
- outw(cpu_to_le16(*vaddr++), io_addr);
- }
- static inline void
- __ixp4xx_outl(u32 value, u32 addr)
- {
- ixp4xx_pci_write(addr, NP_CMD_IOWRITE, value);
- }
- static inline void
- __ixp4xx_outsl(u32 io_addr, const u32 *vaddr, u32 count)
- {
- while (count--)
- outl(*vaddr++, io_addr);
- }
- static inline u8
- __ixp4xx_inb(u32 addr)
- {
- u32 n, byte_enables, data;
- n = addr % 4;
- byte_enables = (0xf & ~BIT(n)) << IXP4XX_PCI_NP_CBE_BESL;
- if (ixp4xx_pci_read(addr, byte_enables | NP_CMD_IOREAD, &data))
- return 0xff;
- return data >> (8*n);
- }
- static inline void
- __ixp4xx_insb(u32 io_addr, u8 *vaddr, u32 count)
- {
- while (count--)
- *vaddr++ = inb(io_addr);
- }
- static inline u16
- __ixp4xx_inw(u32 addr)
- {
- u32 n, byte_enables, data;
- n = addr % 4;
- byte_enables = (0xf & ~(BIT(n) | BIT(n+1))) << IXP4XX_PCI_NP_CBE_BESL;
- if (ixp4xx_pci_read(addr, byte_enables | NP_CMD_IOREAD, &data))
- return 0xffff;
- return data>>(8*n);
- }
- static inline void
- __ixp4xx_insw(u32 io_addr, u16 *vaddr, u32 count)
- {
- while (count--)
- *vaddr++ = le16_to_cpu(inw(io_addr));
- }
- static inline u32
- __ixp4xx_inl(u32 addr)
- {
- u32 data;
- if (ixp4xx_pci_read(addr, NP_CMD_IOREAD, &data))
- return 0xffffffff;
- return data;
- }
- static inline void
- __ixp4xx_insl(u32 io_addr, u32 *vaddr, u32 count)
- {
- while (count--)
- *vaddr++ = inl(io_addr);
- }
- #define PIO_OFFSET 0x10000UL
- #define PIO_MASK 0x0ffffUL
- #define __is_io_address(p) (((unsigned long)p >= PIO_OFFSET) &&
- ((unsigned long)p <= (PIO_MASK + PIO_OFFSET)))
- static inline unsigned int
- __ixp4xx_ioread8(void __iomem *addr)
- {
- unsigned long port = (unsigned long __force)addr;
- if (__is_io_address(port))
- return (unsigned int)__ixp4xx_inb(port & PIO_MASK);
- else
- #ifndef CONFIG_IXP4XX_INDIRECT_PCI
- return (unsigned int)__raw_readb(port);
- #else
- return (unsigned int)__ixp4xx_readb(port);
- #endif
- }
- static inline void
- __ixp4xx_ioread8_rep(void __iomem *addr, void *vaddr, u32 count)
- {
- unsigned long port = (unsigned long __force)addr;
- if (__is_io_address(port))
- __ixp4xx_insb(port & PIO_MASK, vaddr, count);
- else
- #ifndef CONFIG_IXP4XX_INDIRECT_PCI
- __raw_readsb(addr, vaddr, count);
- #else
- __ixp4xx_readsb(port, vaddr, count);
- #endif
- }
- static inline unsigned int
- __ixp4xx_ioread16(void __iomem *addr)
- {
- unsigned long port = (unsigned long __force)addr;
- if (__is_io_address(port))
- return (unsigned int)__ixp4xx_inw(port & PIO_MASK);
- else
- #ifndef CONFIG_IXP4XX_INDIRECT_PCI
- return le16_to_cpu(__raw_readw((u32)port));
- #else
- return (unsigned int)__ixp4xx_readw((u32)port);
- #endif
- }
- static inline void
- __ixp4xx_ioread16_rep(void __iomem *addr, void *vaddr, u32 count)
- {
- unsigned long port = (unsigned long __force)addr;
- if (__is_io_address(port))
- __ixp4xx_insw(port & PIO_MASK, vaddr, count);
- else
- #ifndef CONFIG_IXP4XX_INDIRECT_PCI
- __raw_readsw(addr, vaddr, count);
- #else
- __ixp4xx_readsw(port, vaddr, count);
- #endif
- }
- static inline unsigned int
- __ixp4xx_ioread32(void __iomem *addr)
- {
- unsigned long port = (unsigned long __force)addr;
- if (__is_io_address(port))
- return (unsigned int)__ixp4xx_inl(port & PIO_MASK);
- else {
- #ifndef CONFIG_IXP4XX_INDIRECT_PCI
- return le32_to_cpu(__raw_readl((u32)port));
- #else
- return (unsigned int)__ixp4xx_readl((u32)port);
- #endif
- }
- }
- static inline void
- __ixp4xx_ioread32_rep(void __iomem *addr, void *vaddr, u32 count)
- {
- unsigned long port = (unsigned long __force)addr;
- if (__is_io_address(port))
- __ixp4xx_insl(port & PIO_MASK, vaddr, count);
- else
- #ifndef CONFIG_IXP4XX_INDIRECT_PCI
- __raw_readsl(addr, vaddr, count);
- #else
- __ixp4xx_readsl(port, vaddr, count);
- #endif
- }
- static inline void
- __ixp4xx_iowrite8(u8 value, void __iomem *addr)
- {
- unsigned long port = (unsigned long __force)addr;
- if (__is_io_address(port))
- __ixp4xx_outb(value, port & PIO_MASK);
- else
- #ifndef CONFIG_IXP4XX_INDIRECT_PCI
- __raw_writeb(value, port);
- #else
- __ixp4xx_writeb(value, port);
- #endif
- }
- static inline void
- __ixp4xx_iowrite8_rep(void __iomem *addr, const void *vaddr, u32 count)
- {
- unsigned long port = (unsigned long __force)addr;
- if (__is_io_address(port))
- __ixp4xx_outsb(port & PIO_MASK, vaddr, count);
- else
- #ifndef CONFIG_IXP4XX_INDIRECT_PCI
- __raw_writesb(addr, vaddr, count);
- #else
- __ixp4xx_writesb(port, vaddr, count);
- #endif
- }
- static inline void
- __ixp4xx_iowrite16(u16 value, void __iomem *addr)
- {
- unsigned long port = (unsigned long __force)addr;
- if (__is_io_address(port))
- __ixp4xx_outw(value, port & PIO_MASK);
- else
- #ifndef CONFIG_IXP4XX_INDIRECT_PCI
- __raw_writew(cpu_to_le16(value), addr);
- #else
- __ixp4xx_writew(value, port);
- #endif
- }
- static inline void
- __ixp4xx_iowrite16_rep(void __iomem *addr, const void *vaddr, u32 count)
- {
- unsigned long port = (unsigned long __force)addr;
- if (__is_io_address(port))
- __ixp4xx_outsw(port & PIO_MASK, vaddr, count);
- else
- #ifndef CONFIG_IXP4XX_INDIRECT_PCI
- __raw_writesw(addr, vaddr, count);
- #else
- __ixp4xx_writesw(port, vaddr, count);
- #endif
- }
- static inline void
- __ixp4xx_iowrite32(u32 value, void __iomem *addr)
- {
- unsigned long port = (unsigned long __force)addr;
- if (__is_io_address(port))
- __ixp4xx_outl(value, port & PIO_MASK);
- else
- #ifndef CONFIG_IXP4XX_INDIRECT_PCI
- __raw_writel(cpu_to_le32(value), port);
- #else
- __ixp4xx_writel(value, port);
- #endif
- }
- static inline void
- __ixp4xx_iowrite32_rep(void __iomem *addr, const void *vaddr, u32 count)
- {
- unsigned long port = (unsigned long __force)addr;
- if (__is_io_address(port))
- __ixp4xx_outsl(port & PIO_MASK, vaddr, count);
- else
- #ifndef CONFIG_IXP4XX_INDIRECT_PCI
- __raw_writesl(addr, vaddr, count);
- #else
- __ixp4xx_writesl(port, vaddr, count);
- #endif
- }
- #define ioread8(p) __ixp4xx_ioread8(p)
- #define ioread16(p) __ixp4xx_ioread16(p)
- #define ioread32(p) __ixp4xx_ioread32(p)
- #define ioread8_rep(p, v, c) __ixp4xx_ioread8_rep(p, v, c)
- #define ioread16_rep(p, v, c) __ixp4xx_ioread16_rep(p, v, c)
- #define ioread32_rep(p, v, c) __ixp4xx_ioread32_rep(p, v, c)
- #define iowrite8(v,p) __ixp4xx_iowrite8(v,p)
- #define iowrite16(v,p) __ixp4xx_iowrite16(v,p)
- #define iowrite32(v,p) __ixp4xx_iowrite32(v,p)
- #define iowrite8_rep(p, v, c) __ixp4xx_iowrite8_rep(p, v, c)
- #define iowrite16_rep(p, v, c) __ixp4xx_iowrite16_rep(p, v, c)
- #define iowrite32_rep(p, v, c) __ixp4xx_iowrite32_rep(p, v, c)
- #define ioport_map(port, nr) ((void __iomem*)(port + PIO_OFFSET))
- #define ioport_unmap(addr)
- #endif // __ASM_ARM_ARCH_IO_H