io.h
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上传日期:2013-04-10
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文件大小:10k
- #ifndef _PPC64_IO_H
- #define _PPC64_IO_H
- /*
- * This program 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.
- */
- #include <linux/config.h>
- #include <asm/page.h>
- #include <asm/byteorder.h>
- #ifdef CONFIG_PPC_ISERIES
- #include <asm/iSeries/iSeries_io.h>
- #endif
- #include <asm/memory.h>
- #include <asm/delay.h>
- #define SIO_CONFIG_RA 0x398
- #define SIO_CONFIG_RD 0x399
- #define SLOW_DOWN_IO
- /* Define this if you want to see virt_to_* messages */
- #undef __IO_DEBUG
- extern unsigned long isa_io_base;
- extern unsigned long isa_mem_base;
- extern unsigned long pci_io_base;
- extern unsigned long pci_dram_offset;
- extern int have_print;
- #define _IO_BASE isa_io_base
- #define _ISA_MEM_BASE isa_mem_base
- #define PCI_DRAM_OFFSET pci_dram_offset
- #ifdef CONFIG_PPC_ISERIES
- #define readb(addr) iSeries_Read_Byte((void*)(addr))
- #define readw(addr) iSeries_Read_Word((void*)(addr))
- #define readl(addr) iSeries_Read_Long((void*)(addr))
- #define writeb(data, addr) iSeries_Write_Byte(data,((void*)(addr)))
- #define writew(data, addr) iSeries_Write_Word(data,((void*)(addr)))
- #define writel(data, addr) iSeries_Write_Long(data,((void*)(addr)))
- #define memset_io(a,b,c) iSeries_memset_io((void *)(a),(b),(c))
- #define memcpy_fromio(a,b,c) iSeries_memcpy_fromio((void *)(a), (void *)(b), (c))
- #define memcpy_toio(a,b,c) iSeries_memcpy_toio((void *)(a), (void *)(b), (c))
- #define inb(addr) readb(((unsigned long)(addr)))
- #define inw(addr) readw(((unsigned long)(addr)))
- #define inl(addr) readl(((unsigned long)(addr)))
- #define outb(data,addr) writeb(data,((unsigned long)(addr)))
- #define outw(data,addr) writew(data,((unsigned long)(addr)))
- #define outl(data,addr) writel(data,((unsigned long)(addr)))
- #else
- #define IS_MAPPED_VADDR(port) ((unsigned long)(port) >> 60UL)
- #define readb(addr) eeh_readb((void*)(addr))
- #define readw(addr) eeh_readw((void*)(addr))
- #define readl(addr) eeh_readl((void*)(addr))
- #define writeb(data, addr) eeh_writeb((data), ((void*)(addr)))
- #define writew(data, addr) eeh_writew((data), ((void*)(addr)))
- #define writel(data, addr) eeh_writel((data), ((void*)(addr)))
- #define memset_io(a,b,c) eeh_memset_io((void *)(a),(b),(c))
- #define memcpy_fromio(a,b,c) eeh_memcpy_fromio((a),(void *)(b),(c))
- #define memcpy_toio(a,b,c) eeh_memcpy_toio((void *)(a),(b),(c))
- #define inb(port) _inb((unsigned long)port)
- #define outb(val, port) _outb(val, (unsigned long)port)
- #define inw(port) _inw((unsigned long)port)
- #define outw(val, port) _outw(val, (unsigned long)port)
- #define inl(port) _inl((unsigned long)port)
- #define outl(val, port) _outl(val, (unsigned long)port)
- /*
- * 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) eeh_insb((u8 *)(port), (buf), (ns))
- #define outsb(port, buf, ns) eeh_outsb((u8 *)(port), (buf), (ns))
- #define insw(port, buf, ns) eeh_insw_ns((u16 *)(port), (buf), (ns))
- #define outsw(port, buf, ns) eeh_outsw_ns((u16 *)(port), (buf), (ns))
- #define insl(port, buf, nl) eeh_insl_ns((u32 *)(port), (buf), (nl))
- #define outsl(port, buf, nl) eeh_outsl_ns((u32 *)(port), (buf), (nl))
- #endif
- /*
- * output pause versions need a delay at least for the
- * w83c105 ide controller in a p610.
- */
- #define inb_p(port) inb(port)
- #define outb_p(val, port) (udelay(1), outb((val), (port)))
- #define inw_p(port) inw(port)
- #define outw_p(val, port) (udelay(1), outw((val), (port)))
- #define inl_p(port) inl(port)
- #define outl_p(val, port) (udelay(1), 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(port, buf, ns)
- #define outsw_ns(port, buf, ns) outsw(port, buf, ns)
- #define insl_ns(port, buf, nl) insl(port, buf, nl)
- #define outsl_ns(port, buf, nl) outsl(port, buf, nl)
- #define IO_SPACE_LIMIT ~(0UL)
- #define MEM_SPACE_LIMIT ~(0UL)
- #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);
- /*
- * Change virtual addresses to physical addresses and vv, for
- * addresses in the area where the kernel has the RAM mapped.
- */
- static inline unsigned long virt_to_phys(volatile void * address)
- {
- #ifdef __IO_DEBUG
- printk("virt_to_phys: 0x%08lx -> 0x%08lxn",
- (unsigned long) address,
- __pa((unsigned long)address));
- #endif
- return __pa((unsigned long)address);
- }
- static inline void * phys_to_virt(unsigned long address)
- {
- #ifdef __IO_DEBUG
- printk("phys_to_virt: 0x%08lx -> 0x%08lxn", address, __va(address));
- #endif
- return (void *) __va(address);
- }
-
- /*
- * Change "struct page" to physical address.
- */
- #define page_to_phys(page) ((page - mem_map) << PAGE_SHIFT)
- #endif /* __KERNEL__ */
- static inline void iosync(void)
- {
- __asm__ __volatile__ ("sync" : : : "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.
- * Until we can validate all required device drivers are weakc safe, an
- * excess of syncs before the MMIO operations will make things work. On
- * sstar, sync time is << than mmio time, so this should not be a big impact.
- */
- static inline int in_8(volatile unsigned char *addr)
- {
- int ret;
- __asm__ __volatile__("sync; lbz%U1%X1 %0,%1; sync" : "=r" (ret) : "m" (*addr));
- return ret;
- }
- static inline void out_8(volatile unsigned char *addr, int val)
- {
- __asm__ __volatile__("sync; stb%U0%X0 %1,%0; sync" : "=m" (*addr) : "r" (val));
- }
- static inline int in_le16(volatile unsigned short *addr)
- {
- int ret;
- __asm__ __volatile__("sync; lhbrx %0,0,%1; sync" : "=r" (ret) :
- "r" (addr), "m" (*addr));
- return ret;
- }
- static inline int in_be16(volatile unsigned short *addr)
- {
- int ret;
- __asm__ __volatile__("sync; lhz%U1%X1 %0,%1; sync" : "=r" (ret) : "m" (*addr));
- return ret;
- }
- static inline void out_le16(volatile unsigned short *addr, int val)
- {
- __asm__ __volatile__("sync; sthbrx %1,0,%2; sync" : "=m" (*addr) :
- "r" (val), "r" (addr));
- }
- static inline void out_be16(volatile unsigned short *addr, int val)
- {
- __asm__ __volatile__("sync; sth%U0%X0 %1,%0; sync" : "=m" (*addr) : "r" (val));
- }
- static inline unsigned in_le32(volatile unsigned *addr)
- {
- unsigned ret;
- __asm__ __volatile__("sync; lwbrx %0,0,%1; sync" : "=r" (ret) :
- "r" (addr), "m" (*addr));
- return ret;
- }
- static inline unsigned in_be32(volatile unsigned *addr)
- {
- unsigned ret;
- __asm__ __volatile__("sync; lwz%U1%X1 %0,%1; sync" : "=r" (ret) : "m" (*addr));
- return ret;
- }
- static inline void out_le32(volatile unsigned *addr, int val)
- {
- __asm__ __volatile__("sync; stwbrx %1,0,%2; sync" : "=m" (*addr) :
- "r" (val), "r" (addr));
- }
- static inline void out_be32(volatile unsigned *addr, int val)
- {
- __asm__ __volatile__("sync; stw%U0%X0 %1,%0; sync" : "=m" (*addr) : "r" (val));
- }
- #ifndef CONFIG_PPC_ISERIES
- #include <asm/eeh.h>
- static inline u8 _inb(unsigned long port) {
- if (IS_MAPPED_VADDR(port))
- return readb((void *)port);
- else if (_IO_BASE)
- return in_8((u8 *)((port)+_IO_BASE));
- else
- return 0xff;
- }
- static inline void _outb(u8 val, unsigned long port) {
- if (IS_MAPPED_VADDR(port))
- return writeb(val, (void *)port);
- else if (_IO_BASE)
- out_8((u8 *)((port)+_IO_BASE), val);
- }
- static inline u16 _inw(unsigned long port) {
- if (IS_MAPPED_VADDR(port))
- return readw((void *)port);
- else if (_IO_BASE)
- return in_le16((u16 *)((port)+_IO_BASE));
- else
- return 0xffff;
- }
- static inline void _outw(u16 val, unsigned long port) {
- if (IS_MAPPED_VADDR(port))
- return writew(val, (void *)port);
- else if (_IO_BASE)
- out_le16((u16 *)((port)+_IO_BASE), val);
- }
- static inline u32 _inl(unsigned long port) {
- if (IS_MAPPED_VADDR(port))
- return readl((void *)port);
- else if (_IO_BASE)
- return in_le32((u32 *)((port)+_IO_BASE));
- else
- return 0xffffffff;
- }
- static inline void _outl(u32 val, unsigned long port) {
- if (IS_MAPPED_VADDR(port))
- return writel(val, (void *)port);
- else if (_IO_BASE)
- out_le32((u32 *)((port)+_IO_BASE), val);
- }
- #endif
- #ifdef __KERNEL__
- static inline int check_signature(unsigned long io_addr,
- const unsigned char *signature, int length)
- {
- int retval = 0;
- #ifndef CONFIG_PPC_ISERIES
- do {
- if (readb(io_addr) != *signature)
- goto out;
- io_addr++;
- signature++;
- length--;
- } while (length);
- retval = 1;
- out:
- #endif
- return retval;
- }
- /* 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 /* __KERNEL__ */
- #endif /* _PPC64_IO_H */