#ifndef _ASM_CRIS_IO_H #define _ASM_CRIS_IO_H #include <asm/page.h> /* for __va, __pa */ #include <asm/arch/io.h> #include <linux/kernel.h> struct cris_io_operations { u32 (*read_mem)(void *addr, int size); void (*write_mem)(u32 val, int size, void *addr); u32 (*read_io)(u32 port, void *addr, int size, int count); void (*write_io)(u32 port, void *addr, int size, int count); }; #ifdef CONFIG_PCI extern struct cris_io_operations *cris_iops; #else #define cris_iops ((struct cris_io_operations*)NULL) #endif /* * Change virtual addresses to physical addresses and vv. */ static inline unsigned long virt_to_phys(volatile void * address) { return __pa(address); } static inline void * phys_to_virt(unsigned long address) { return __va(address); } extern void __iomem * __ioremap(unsigned long offset, unsigned long size, unsigned long flags); extern void __iomem * __ioremap_prot(unsigned long phys_addr, unsigned long size, pgprot_t prot); static inline void __iomem * ioremap (unsigned long offset, unsigned long size) { return __ioremap(offset, size, 0); } extern void iounmap(volatile void * __iomem addr); extern void __iomem * ioremap_nocache(unsigned long offset, unsigned long size); /* * IO bus memory addresses are also 1:1 with the physical address */ #define virt_to_bus virt_to_phys #define bus_to_virt phys_to_virt /* * readX/writeX() are used to access memory mapped devices. On some * architectures the memory mapped IO stuff needs to be accessed * differently. On the CRIS architecture, we just read/write the * memory location directly. */ #ifdef CONFIG_PCI #define PCI_SPACE(x) ((((unsigned)(x)) & 0x10000000) == 0x10000000) #else #define PCI_SPACE(x) 0 #endif static inline unsigned char readb(const volatile void __iomem *addr) { if (PCI_SPACE(addr) && cris_iops) return cris_iops->read_mem((void*)addr, 1); else return *(volatile unsigned char __force *) addr; } static inline unsigned short readw(const volatile void __iomem *addr) { if (PCI_SPACE(addr) && cris_iops) return cris_iops->read_mem((void*)addr, 2); else return *(volatile unsigned short __force *) addr; } static inline unsigned int readl(const volatile void __iomem *addr) { if (PCI_SPACE(addr) && cris_iops) return cris_iops->read_mem((void*)addr, 4); else return *(volatile unsigned int __force *) addr; } #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 static inline void writeb(unsigned char b, volatile void __iomem *addr) { if (PCI_SPACE(addr) && cris_iops) cris_iops->write_mem(b, 1, (void*)addr); else *(volatile unsigned char __force *) addr = b; } static inline void writew(unsigned short b, volatile void __iomem *addr) { if (PCI_SPACE(addr) && cris_iops) cris_iops->write_mem(b, 2, (void*)addr); else *(volatile unsigned short __force *) addr = b; } static inline void writel(unsigned int b, volatile void __iomem *addr) { if (PCI_SPACE(addr) && cris_iops) cris_iops->write_mem(b, 4, (void*)addr); else *(volatile unsigned int __force *) addr = b; } #define __raw_writeb writeb #define __raw_writew writew #define __raw_writel writel #define mmiowb() #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)) /* I/O port access. Normally there is no I/O space on CRIS but when * Cardbus/PCI is enabled the request is passed through the bridge. */ #define IO_SPACE_LIMIT 0xffff #define inb(port) (cris_iops ? cris_iops->read_io(port,NULL,1,1) : 0) #define inw(port) (cris_iops ? cris_iops->read_io(port,NULL,2,1) : 0) #define inl(port) (cris_iops ? cris_iops->read_io(port,NULL,4,1) : 0) #define insb(port,addr,count) (cris_iops ? cris_iops->read_io(port,addr,1,count) : 0) #define insw(port,addr,count) (cris_iops ? cris_iops->read_io(port,addr,2,count) : 0) #define insl(port,addr,count) (cris_iops ? cris_iops->read_io(port,addr,4,count) : 0) #define outb(data,port) if (cris_iops) cris_iops->write_io(port,(void*)(unsigned)data,1,1) #define outw(data,port) if (cris_iops) cris_iops->write_io(port,(void*)(unsigned)data,2,1) #define outl(data,port) if (cris_iops) cris_iops->write_io(port,(void*)(unsigned)data,4,1) #define outsb(port,addr,count) if(cris_iops) cris_iops->write_io(port,(void*)addr,1,count) #define outsw(port,addr,count) if(cris_iops) cris_iops->write_io(port,(void*)addr,2,count) #define outsl(port,addr,count) if(cris_iops) cris_iops->write_io(port,(void*)addr,3,count) /* * 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