#ifndef __ALPHA_IO_H #define __ALPHA_IO_H #include #include /* We don't use IO slowdowns on the Alpha, but.. */ #define __SLOW_DOWN_IO do { } while (0) #define SLOW_DOWN_IO do { } while (0) /* * Virtual -> physical identity mapping starts at this offset */ #ifdef USE_48_BIT_KSEG #define IDENT_ADDR 0xffff800000000000 #else #define IDENT_ADDR 0xfffffc0000000000 #endif #ifdef __KERNEL__ #include /* * We try to avoid hae updates (thus the cache), but when we * do need to update the hae, we need to do it atomically, so * that any interrupts wouldn't get confused with the hae * register not being up-to-date with respect to the hardware * value. */ static inline void __set_hae(unsigned long new_hae) { unsigned long flags; __save_and_cli(flags); alpha_mv.hae_cache = new_hae; *alpha_mv.hae_register = new_hae; mb(); /* Re-read to make sure it was written. */ new_hae = *alpha_mv.hae_register; __restore_flags(flags); } static inline void set_hae(unsigned long new_hae) { if (new_hae != alpha_mv.hae_cache) __set_hae(new_hae); } /* * Change virtual addresses to physical addresses and vv. */ static inline unsigned long virt_to_phys(volatile void * address) { /* Conditionalize this on the CPU? This here is 40 bits, whereas EV4 only supports 34. But KSEG is farther out so it shouldn't _really_ matter. */ return 0xffffffffffUL & (unsigned long) address; } static inline void * phys_to_virt(unsigned long address) { return (void *) (address + IDENT_ADDR); } #else /* !__KERNEL__ */ /* * Define actual functions in private name-space so it's easier to * accommodate things like XFree or svgalib that like to define their * own versions of inb etc. */ extern void __sethae (unsigned long addr); /* syscall */ extern void _sethae (unsigned long addr); /* cached version */ #endif /* !__KERNEL__ */ /* * There are different chipsets to interface the Alpha CPUs to the world. */ #ifdef __KERNEL__ #ifdef CONFIG_ALPHA_GENERIC /* In a generic kernel, we always go through the machine vector. */ # define virt_to_bus(a) alpha_mv.mv_virt_to_bus(a) # define bus_to_virt(a) alpha_mv.mv_bus_to_virt(a) # define __inb alpha_mv.mv_inb # define __inw alpha_mv.mv_inw # define __inl alpha_mv.mv_inl # define __outb alpha_mv.mv_outb # define __outw alpha_mv.mv_outw # define __outl alpha_mv.mv_outl # define __readb(a) alpha_mv.mv_readb((unsigned long)(a)) # define __readw(a) alpha_mv.mv_readw((unsigned long)(a)) # define __readl(a) alpha_mv.mv_readl((unsigned long)(a)) # define __readq(a) alpha_mv.mv_readq((unsigned long)(a)) # define __writeb(v,a) alpha_mv.mv_writeb((v),(unsigned long)(a)) # define __writew(v,a) alpha_mv.mv_writew((v),(unsigned long)(a)) # define __writel(v,a) alpha_mv.mv_writel((v),(unsigned long)(a)) # define __writeq(v,a) alpha_mv.mv_writeq((v),(unsigned long)(a)) # define inb __inb # define inw __inw # define inl __inl # define outb __outb # define outw __outw # define outl __outl # define readb __readb # define readw __readw # define readl __readl # define readq __readq # define writeb __writeb # define writew __writew # define writel __writel # define writeq __writeq # define dense_mem(a) alpha_mv.mv_dense_mem(a) #else /* Control how and what gets defined within the core logic headers. */ #define __WANT_IO_DEF #if defined(CONFIG_ALPHA_APECS) # include #elif defined(CONFIG_ALPHA_CIA) # include #elif defined(CONFIG_ALPHA_LCA) # include #elif defined(CONFIG_ALPHA_MCPCIA) # include #elif defined(CONFIG_ALPHA_PYXIS) # include #elif defined(CONFIG_ALPHA_T2) # include #elif defined(CONFIG_ALPHA_TSUNAMI) # include #elif defined(CONFIG_ALPHA_JENSEN) # include #elif defined(CONFIG_ALPHA_RX164) # include #else #error "What system is this?" #endif #undef __WANT_IO_DEF #endif /* GENERIC */ #endif /* __KERNEL__ */ /* * The convention used for inb/outb etc. is that names starting with * two underscores are the inline versions, names starting with a * single underscore are proper functions, and names starting with a * letter are macros that map in some way to inline or proper function * versions. Not all that pretty, but before you change it, be sure * to convince yourself that it won't break anything (in particular * module support). */ extern unsigned int _inb (unsigned long port); extern unsigned int _inw (unsigned long port); extern unsigned int _inl (unsigned long port); extern void _outb (unsigned char b,unsigned long port); extern void _outw (unsigned short w,unsigned long port); extern void _outl (unsigned int l,unsigned long port); extern unsigned long _readb(unsigned long addr); extern unsigned long _readw(unsigned long addr); extern unsigned long _readl(unsigned long addr); extern unsigned long _readq(unsigned long addr); extern void _writeb(unsigned char b, unsigned long addr); extern void _writew(unsigned short b, unsigned long addr); extern void _writel(unsigned int b, unsigned long addr); extern void _writeq(unsigned long b, unsigned long addr); #ifdef __KERNEL__ /* * The platform header files may define some of these macros to use * the inlined versions where appropriate. These macros may also be * redefined by userlevel programs. */ #ifndef inb # define inb(p) _inb((p)) #endif #ifndef inw # define inw(p) _inw((p)) #endif #ifndef inl # define inl(p) _inl((p)) #endif #ifndef outb # define outb(b,p) _outb((b),(p)) #endif #ifndef outw # define outw(w,p) _outw((w),(p)) #endif #ifndef outl # define outl(l,p) _outl((l),(p)) #endif #ifndef inb_p # define inb_p inb #endif #ifndef inw_p # define inw_p inw #endif #ifndef inl_p # define inl_p inl #endif #ifndef outb_p # define outb_p outb #endif #ifndef outw_p # define outw_p outw #endif #ifndef outl_p # define outl_p outl #endif #else /* Userspace declarations. */ extern unsigned int inb (unsigned long port); extern unsigned int inw (unsigned long port); extern unsigned int inl (unsigned long port); extern void outb (unsigned char b,unsigned long port); extern void outw (unsigned short w,unsigned long port); extern void outl (unsigned int l,unsigned long port); extern unsigned long readb(unsigned long addr); extern unsigned long readw(unsigned long addr); extern unsigned long readl(unsigned long addr); extern void writeb(unsigned char b, unsigned long addr); extern void writew(unsigned short b, unsigned long addr); extern void writel(unsigned int b, unsigned long addr); #endif /* __KERNEL__ */ #ifdef __KERNEL__ /* * The "address" in IO memory space is not clearly either an integer or a * pointer. We will accept both, thus the casts. * * On the alpha, we have the whole physical address space mapped at all * times, so "ioremap()" and "iounmap()" do not need to do anything. */ static inline void * ioremap(unsigned long offset, unsigned long size) { return (void *) offset; } static inline void iounmap(void *addr) { } #ifndef readb # define readb(a) _readb((unsigned long)(a)) #endif #ifndef readw # define readw(a) _readw((unsigned long)(a)) #endif #ifndef readl # define readl(a) _readl((unsigned long)(a)) #endif #ifndef readq # define readq(a) _readq((unsigned long)(a)) #endif #ifndef writeb # define writeb(v,a) _writeb((v),(unsigned long)(a)) #endif #ifndef writew # define writew(v,a) _writew((v),(unsigned long)(a)) #endif #ifndef writel # define writel(v,a) _writel((v),(unsigned long)(a)) #endif #ifndef writeq # define writeq(v,a) _writeq((v),(unsigned long)(a)) #endif /* * String version of IO memory access ops: */ extern void _memcpy_fromio(void *, unsigned long, long); extern void _memcpy_toio(unsigned long, const void *, long); extern void _memset_c_io(unsigned long, unsigned long, long); #define memcpy_fromio(to,from,len) \ _memcpy_fromio((to),(unsigned long)(from),(len)) #define memcpy_toio(to,from,len) \ _memcpy_toio((unsigned long)(to),(from),(len)) #define memset_io(addr,c,len) \ _memset_c_io((unsigned long)(addr),0x0101010101010101UL*(u8)(c),(len)) #define __HAVE_ARCH_MEMSETW_IO #define memsetw_io(addr,c,len) \ _memset_c_io((unsigned long)(addr),0x0001000100010001UL*(u16)(c),(len)) /* * String versions of in/out ops: */ extern void insb (unsigned long port, void *dst, unsigned long count); extern void insw (unsigned long port, void *dst, unsigned long count); extern void insl (unsigned long port, void *dst, unsigned long count); extern void outsb (unsigned long port, const void *src, unsigned long count); extern void outsw (unsigned long port, const void *src, unsigned long count); extern void outsl (unsigned long port, const void *src, unsigned long count); /* * XXX - We don't have csum_partial_copy_fromio() yet, so we cheat here and * just copy it. The net code will then do the checksum later. Presently * only used by some shared memory 8390 Ethernet cards anyway. */ #define eth_io_copy_and_sum(skb,src,len,unused) \ memcpy_fromio((skb)->data,(src),(len)) 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; } /* * The Alpha Jensen hardware for some rather strange reason puts * the RTC clock at 0x170 instead of 0x70. Probably due to some * misguided idea about using 0x70 for NMI stuff. * * These defines will override the defaults when doing RTC queries */ #ifdef CONFIG_ALPHA_GENERIC # define RTC_PORT(x) ((x) + alpha_mv.rtc_port) #else # ifdef CONFIG_ALPHA_JENSEN # define RTC_PORT(x) (0x170+(x)) # else # define RTC_PORT(x) (0x70 + (x)) # endif #endif #define RTC_ALWAYS_BCD 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 /* __KERNEL__ */ #endif /* __ALPHA_IO_H */