io.h
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上传日期:2013-04-10
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文件大小:11k
- /*
- * BK Id: SCCS/s.io.h 1.14 10/16/01 15:58:42 trini
- */
- #ifdef __KERNEL__
- #ifndef _PPC_IO_H
- #define _PPC_IO_H
- #include <linux/config.h>
- #include <linux/types.h>
- #include <asm/page.h>
- #include <asm/byteorder.h>
- #define SIO_CONFIG_RA 0x398
- #define SIO_CONFIG_RD 0x399
- #define SLOW_DOWN_IO
- #define PMAC_ISA_MEM_BASE 0
- #define PMAC_PCI_DRAM_OFFSET 0
- #define CHRP_ISA_IO_BASE 0xf8000000
- #define CHRP_ISA_MEM_BASE 0xf7000000
- #define CHRP_PCI_DRAM_OFFSET 0
- #define PREP_ISA_IO_BASE 0x80000000
- #define PREP_ISA_MEM_BASE 0xc0000000
- #define PREP_PCI_DRAM_OFFSET 0x80000000
- #if defined(CONFIG_4xx)
- #include <asm/ppc4xx.h>
- #elif defined(CONFIG_8xx)
- #include <asm/mpc8xx.h>
- #elif defined(CONFIG_8260)
- #include <asm/mpc8260.h>
- #elif defined(CONFIG_APUS)
- #define _IO_BASE 0
- #define _ISA_MEM_BASE 0
- #define PCI_DRAM_OFFSET 0
- #else /* Everyone else */
- extern unsigned long isa_io_base;
- extern unsigned long isa_mem_base;
- extern unsigned long pci_dram_offset;
- #define _IO_BASE isa_io_base
- #define _ISA_MEM_BASE isa_mem_base
- #define PCI_DRAM_OFFSET pci_dram_offset
- #endif /* Platform-dependant I/O */
- #define readb(addr) in_8((volatile u8 *)(addr))
- #define writeb(b,addr) out_8((volatile u8 *)(addr), (b))
- #if defined(CONFIG_APUS)
- #define readw(addr) (*(volatile u16 *) (addr))
- #define readl(addr) (*(volatile u32 *) (addr))
- #define writew(b,addr) ((*(volatile u16 *) (addr)) = (b))
- #define writel(b,addr) ((*(volatile u32 *) (addr)) = (b))
- #else
- #define readw(addr) in_le16((volatile u16 *)(addr))
- #define readl(addr) in_le32((volatile u32 *)(addr))
- #define writew(b,addr) out_le16((volatile u16 *)(addr),(b))
- #define writel(b,addr) out_le32((volatile u32 *)(addr),(b))
- #endif
- #define __raw_readb(addr) (*(volatile unsigned char *)(addr))
- #define __raw_readw(addr) (*(volatile unsigned short *)(addr))
- #define __raw_readl(addr) (*(volatile unsigned int *)(addr))
- #define __raw_writeb(v, addr) (*(volatile unsigned char *)(addr) = (v))
- #define __raw_writew(v, addr) (*(volatile unsigned short *)(addr) = (v))
- #define __raw_writel(v, addr) (*(volatile unsigned int *)(addr) = (v))
- /*
- * The insw/outsw/insl/outsl macros don't do byte-swapping.
- * They are only used in practice for transferring buffers which
- * are arrays of bytes, and byte-swapping is not appropriate in
- * that case. - paulus
- */
- #define insb(port, buf, ns) _insb((u8 *)((port)+_IO_BASE), (buf), (ns))
- #define outsb(port, buf, ns) _outsb((u8 *)((port)+_IO_BASE), (buf), (ns))
- #define insw(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
- #define outsw(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
- #define insl(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
- #define outsl(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
- #ifdef CONFIG_ALL_PPC
- /*
- * We have to handle possible machine checks here on powermacs
- * and potentially some CHRPs -- paulus.
- */
- #define __do_in_asm(name, op)
- extern __inline__ unsigned int name(unsigned int port)
- {
- unsigned int x;
- __asm__ __volatile__(
- op " %0,0,%1n"
- "1: twi 0,%0,0n"
- "2: isyncn"
- "3: nopn"
- "4:n"
- ".section .fixup,"ax"n"
- "5: li %0,-1n"
- " b 4bn"
- ".previousn"
- ".section __ex_table,"a"n"
- " .align 2n"
- " .long 1b,5bn"
- " .long 2b,5bn"
- " .long 3b,5bn"
- ".previous"
- : "=&r" (x)
- : "r" (port + _IO_BASE));
- return x;
- }
- #define __do_out_asm(name, op)
- extern __inline__ void name(unsigned int val, unsigned int port)
- {
- __asm__ __volatile__(
- op " %0,0,%1n"
- "1: syncn"
- "2:n"
- ".section __ex_table,"a"n"
- " .align 2n"
- " .long 1b,2bn"
- ".previous"
- : : "r" (val), "r" (port + _IO_BASE));
- }
- __do_in_asm(inb, "lbzx")
- __do_in_asm(inw, "lhbrx")
- __do_in_asm(inl, "lwbrx")
- __do_out_asm(outb, "stbx")
- __do_out_asm(outw, "sthbrx")
- __do_out_asm(outl, "stwbrx")
- #elif defined(CONFIG_APUS)
- #define inb(port) in_8((u8 *)((port)+_IO_BASE))
- #define outb(val, port) out_8((u8 *)((port)+_IO_BASE), (val))
- #define inw(port) in_be16((u16 *)((port)+_IO_BASE))
- #define outw(val, port) out_be16((u16 *)((port)+_IO_BASE), (val))
- #define inl(port) in_be32((u32 *)((port)+_IO_BASE))
- #define outl(val, port) out_be32((u32 *)((port)+_IO_BASE), (val))
- #else /* not APUS or ALL_PPC */
- #define inb(port) in_8((u8 *)((port)+_IO_BASE))
- #define outb(val, port) out_8((u8 *)((port)+_IO_BASE), (val))
- #define inw(port) in_le16((u16 *)((port)+_IO_BASE))
- #define outw(val, port) out_le16((u16 *)((port)+_IO_BASE), (val))
- #define inl(port) in_le32((u32 *)((port)+_IO_BASE))
- #define outl(val, port) out_le32((u32 *)((port)+_IO_BASE), (val))
- #endif
- #define inb_p(port) inb((port))
- #define outb_p(val, port) outb((val), (port))
- #define inw_p(port) inw((port))
- #define outw_p(val, port) outw((val), (port))
- #define inl_p(port) inl((port))
- #define outl_p(val, port) outl((val), (port))
- extern void _insb(volatile u8 *port, void *buf, int ns);
- extern void _outsb(volatile u8 *port, const void *buf, int ns);
- extern void _insw(volatile u16 *port, void *buf, int ns);
- extern void _outsw(volatile u16 *port, const void *buf, int ns);
- extern void _insl(volatile u32 *port, void *buf, int nl);
- extern void _outsl(volatile u32 *port, const void *buf, int nl);
- extern void _insw_ns(volatile u16 *port, void *buf, int ns);
- extern void _outsw_ns(volatile u16 *port, const void *buf, int ns);
- extern void _insl_ns(volatile u32 *port, void *buf, int nl);
- extern void _outsl_ns(volatile u32 *port, const void *buf, int nl);
- /*
- * The *_ns versions below don't do byte-swapping.
- * Neither do the standard versions now, these are just here
- * for older code.
- */
- #define insw_ns(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
- #define outsw_ns(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
- #define insl_ns(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
- #define outsl_ns(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
- #define IO_SPACE_LIMIT ~0
- #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))
- #ifdef __KERNEL__
- /*
- * Map in an area of physical address space, for accessing
- * I/O devices etc.
- */
- extern void *__ioremap(unsigned long address, unsigned long size,
- unsigned long flags);
- extern void *ioremap(unsigned long address, unsigned long size);
- #define ioremap_nocache(addr, size) ioremap((addr), (size))
- extern void iounmap(void *addr);
- extern unsigned long iopa(unsigned long addr);
- extern unsigned long mm_ptov(unsigned long addr) __attribute__ ((const));
- extern void io_block_mapping(unsigned long virt, unsigned long phys,
- unsigned int size, int flags);
- /*
- * The PCI bus is inherently Little-Endian. The PowerPC is being
- * run Big-Endian. Thus all values which cross the [PCI] barrier
- * must be endian-adjusted. Also, the local DRAM has a different
- * address from the PCI point of view, thus buffer addresses also
- * have to be modified [mapped] appropriately.
- */
- extern inline unsigned long virt_to_bus(volatile void * address)
- {
- #ifndef CONFIG_APUS
- if (address == (void *)0)
- return 0;
- return (unsigned long)address - KERNELBASE + PCI_DRAM_OFFSET;
- #else
- return iopa ((unsigned long) address);
- #endif
- }
- extern inline void * bus_to_virt(unsigned long address)
- {
- #ifndef CONFIG_APUS
- if (address == 0)
- return 0;
- return (void *)(address - PCI_DRAM_OFFSET + KERNELBASE);
- #else
- return (void*) mm_ptov (address);
- #endif
- }
- /*
- * Change virtual addresses to physical addresses and vv, for
- * addresses in the area where the kernel has the RAM mapped.
- */
- extern inline unsigned long virt_to_phys(volatile void * address)
- {
- #ifndef CONFIG_APUS
- return (unsigned long) address - KERNELBASE;
- #else
- return iopa ((unsigned long) address);
- #endif
- }
- extern inline void * phys_to_virt(unsigned long address)
- {
- #ifndef CONFIG_APUS
- return (void *) (address + KERNELBASE);
- #else
- return (void*) mm_ptov (address);
- #endif
- }
- /*
- * Change "struct page" to physical address.
- */
- #define page_to_phys(page) ((page - mem_map) << PAGE_SHIFT)
- #define page_to_bus(page) (page_to_phys(page) + PCI_DRAM_OFFSET)
- #endif /* __KERNEL__ */
- /*
- * Enforce In-order Execution of I/O:
- * Acts as a barrier to ensure all previous I/O accesses have
- * completed before any further ones are issued.
- */
- extern inline void eieio(void)
- {
- __asm__ __volatile__ ("eieio" : : : "memory");
- }
- /* Enforce in-order execution of data I/O.
- * No distinction between read/write on PPC; use eieio for all three.
- */
- #define iobarrier_rw() eieio()
- #define iobarrier_r() eieio()
- #define iobarrier_w() eieio()
- /*
- * 8, 16 and 32 bit, big and little endian I/O operations, with barrier.
- */
- extern inline int in_8(volatile unsigned char *addr)
- {
- int ret;
- __asm__ __volatile__("lbz%U1%X1 %0,%1; eieio" : "=r" (ret) : "m" (*addr));
- return ret;
- }
- extern inline void out_8(volatile unsigned char *addr, int val)
- {
- __asm__ __volatile__("stb%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val));
- }
- extern inline int in_le16(volatile unsigned short *addr)
- {
- int ret;
- __asm__ __volatile__("lhbrx %0,0,%1; eieio" : "=r" (ret) :
- "r" (addr), "m" (*addr));
- return ret;
- }
- extern inline int in_be16(volatile unsigned short *addr)
- {
- int ret;
- __asm__ __volatile__("lhz%U1%X1 %0,%1; eieio" : "=r" (ret) : "m" (*addr));
- return ret;
- }
- extern inline void out_le16(volatile unsigned short *addr, int val)
- {
- __asm__ __volatile__("sthbrx %1,0,%2; eieio" : "=m" (*addr) :
- "r" (val), "r" (addr));
- }
- extern inline void out_be16(volatile unsigned short *addr, int val)
- {
- __asm__ __volatile__("sth%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val));
- }
- extern inline unsigned in_le32(volatile unsigned *addr)
- {
- unsigned ret;
- __asm__ __volatile__("lwbrx %0,0,%1; eieio" : "=r" (ret) :
- "r" (addr), "m" (*addr));
- return ret;
- }
- extern inline unsigned in_be32(volatile unsigned *addr)
- {
- unsigned ret;
- __asm__ __volatile__("lwz%U1%X1 %0,%1; eieio" : "=r" (ret) : "m" (*addr));
- return ret;
- }
- extern inline void out_le32(volatile unsigned *addr, int val)
- {
- __asm__ __volatile__("stwbrx %1,0,%2; eieio" : "=m" (*addr) :
- "r" (val), "r" (addr));
- }
- extern inline void out_be32(volatile unsigned *addr, int val)
- {
- __asm__ __volatile__("stw%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val));
- }
- static inline int check_signature(unsigned long io_addr,
- const unsigned char *signature, int length)
- {
- int retval = 0;
- do {
- if (readb(io_addr) != *signature)
- goto out;
- io_addr++;
- signature++;
- length--;
- } while (length);
- retval = 1;
- out:
- return retval;
- }
- /* Make some pcmcia drivers happy */
- static inline int isa_check_signature(unsigned long io_addr,
- const unsigned char *signature, int length)
- {
- return 0;
- }
- /* 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)
- #endif
- #endif /* __KERNEL__ */