| /* |
| * $Id: io.h,v 1.30 2001/12/21 01:23:21 davem Exp $ |
| */ |
| #ifndef __SPARC_IO_H |
| #define __SPARC_IO_H |
| |
| #include <linux/kernel.h> |
| #include <linux/types.h> |
| #include <linux/ioport.h> /* struct resource */ |
| |
| #include <asm/page.h> /* IO address mapping routines need this */ |
| #include <asm/system.h> |
| |
| #define page_to_phys(page) ((page - mem_map) << PAGE_SHIFT) |
| |
| static __inline__ u32 flip_dword (u32 d) |
| { |
| return ((d&0xff)<<24) | (((d>>8)&0xff)<<16) | (((d>>16)&0xff)<<8)| ((d>>24)&0xff); |
| } |
| |
| static __inline__ u16 flip_word (u16 d) |
| { |
| return ((d&0xff) << 8) | ((d>>8)&0xff); |
| } |
| |
| /* |
| * Memory mapped I/O to PCI |
| */ |
| static __inline__ u8 readb(unsigned long addr) |
| { |
| return *(volatile u8 *)addr; |
| } |
| |
| static __inline__ u16 readw(unsigned long addr) |
| { |
| return flip_word(*(volatile u16 *)addr); |
| } |
| |
| static __inline__ u32 readl(unsigned long addr) |
| { |
| return flip_dword(*(volatile u32 *)addr); |
| } |
| |
| static __inline__ void writeb(u8 b, unsigned long addr) |
| { |
| *(volatile u8 *)addr = b; |
| } |
| |
| static __inline__ void writew(u16 b, unsigned long addr) |
| { |
| *(volatile u16 *)addr = flip_word(b); |
| } |
| |
| static __inline__ void writel(u32 b, unsigned long addr) |
| { |
| *(volatile u32 *)addr = flip_dword(b); |
| } |
| |
| /* Now the 'raw' versions. */ |
| static __inline__ u8 __raw_readb(unsigned long addr) |
| { |
| return *(volatile u8 *)addr; |
| } |
| |
| static __inline__ u16 __raw_readw(unsigned long addr) |
| { |
| return *(volatile u16 *)addr; |
| } |
| |
| static __inline__ u32 __raw_readl(unsigned long addr) |
| { |
| return *(volatile u32 *)addr; |
| } |
| |
| static __inline__ void __raw_writeb(u8 b, unsigned long addr) |
| { |
| *(volatile u8 *)addr = b; |
| } |
| |
| static __inline__ void __raw_writew(u16 b, unsigned long addr) |
| { |
| *(volatile u16 *)addr = b; |
| } |
| |
| static __inline__ void __raw_writel(u32 b, unsigned long addr) |
| { |
| *(volatile u32 *)addr = b; |
| } |
| |
| /* |
| * I/O space operations |
| * |
| * Arrangement on a Sun is somewhat complicated. |
| * |
| * First of all, we want to use standard Linux drivers |
| * for keyboard, PC serial, etc. These drivers think |
| * they access I/O space and use inb/outb. |
| * On the other hand, EBus bridge accepts PCI *memory* |
| * cycles and converts them into ISA *I/O* cycles. |
| * Ergo, we want inb & outb to generate PCI memory cycles. |
| * |
| * If we want to issue PCI *I/O* cycles, we do this |
| * with a low 64K fixed window in PCIC. This window gets |
| * mapped somewhere into virtual kernel space and we |
| * can use inb/outb again. |
| */ |
| #define inb_local(addr) readb(addr) |
| #define inb(addr) readb(addr) |
| #define inw(addr) readw(addr) |
| #define inl(addr) readl(addr) |
| #define inb_p(addr) readb(addr) |
| |
| #define outb_local(b, addr) writeb(b, addr) |
| #define outb(b, addr) writeb(b, addr) |
| #define outw(b, addr) writew(b, addr) |
| #define outl(b, addr) writel(b, addr) |
| #define outb_p(b, addr) writeb(b, addr) |
| |
| extern void outsb(unsigned long addr, const void *src, unsigned long cnt); |
| extern void outsw(unsigned long addr, const void *src, unsigned long cnt); |
| extern void outsl(unsigned long addr, const void *src, unsigned long cnt); |
| extern void insb(unsigned long addr, void *dst, unsigned long count); |
| extern void insw(unsigned long addr, void *dst, unsigned long count); |
| extern void insl(unsigned long addr, void *dst, unsigned long count); |
| |
| #define IO_SPACE_LIMIT 0xffffffff |
| |
| /* |
| * SBus accessors. |
| * |
| * SBus has only one, memory mapped, I/O space. |
| * We do not need to flip bytes for SBus of course. |
| */ |
| static __inline__ u8 _sbus_readb(unsigned long addr) |
| { |
| return *(volatile u8 *)addr; |
| } |
| |
| static __inline__ u16 _sbus_readw(unsigned long addr) |
| { |
| return *(volatile u16 *)addr; |
| } |
| |
| static __inline__ u32 _sbus_readl(unsigned long addr) |
| { |
| return *(volatile u32 *)addr; |
| } |
| |
| static __inline__ void _sbus_writeb(u8 b, unsigned long addr) |
| { |
| *(volatile u8 *)addr = b; |
| } |
| |
| static __inline__ void _sbus_writew(u16 b, unsigned long addr) |
| { |
| *(volatile u16 *)addr = b; |
| } |
| |
| static __inline__ void _sbus_writel(u32 b, unsigned long addr) |
| { |
| *(volatile u32 *)addr = b; |
| } |
| |
| /* |
| * The only reason for #define's is to hide casts to unsigned long. |
| * XXX Rewrite drivers without structures for registers. |
| */ |
| #define sbus_readb(a) _sbus_readb((unsigned long)(a)) |
| #define sbus_readw(a) _sbus_readw((unsigned long)(a)) |
| #define sbus_readl(a) _sbus_readl((unsigned long)(a)) |
| #define sbus_writeb(v, a) _sbus_writeb(v, (unsigned long)(a)) |
| #define sbus_writew(v, a) _sbus_writew(v, (unsigned long)(a)) |
| #define sbus_writel(v, a) _sbus_writel(v, (unsigned long)(a)) |
| |
| static inline void *sbus_memset_io(void *__dst, int c, __kernel_size_t n) |
| { |
| unsigned long dst = (unsigned long)__dst; |
| |
| while(n--) { |
| sbus_writeb(c, dst); |
| dst++; |
| } |
| return (void *) dst; |
| } |
| |
| #ifdef __KERNEL__ |
| |
| /* |
| * Bus number may be embedded in the higher bits of the physical address. |
| * This is why we have no bus number argument to ioremap(). |
| */ |
| extern void *ioremap(unsigned long offset, unsigned long size); |
| #define ioremap_nocache(X,Y) ioremap((X),(Y)) |
| extern void iounmap(void *addr); |
| |
| /* P3: talk davem into dropping "name" argument in favor of res->name */ |
| /* |
| * Bus number may be in res->flags... somewhere. |
| */ |
| extern unsigned long sbus_ioremap(struct resource *res, unsigned long offset, |
| unsigned long size, char *name); |
| /* XXX Partial deallocations? I think not! */ |
| extern void sbus_iounmap(unsigned long vaddr, unsigned long size); |
| |
| |
| #define virt_to_phys(x) __pa((unsigned long)(x)) |
| #define phys_to_virt(x) __va((unsigned long)(x)) |
| |
| /* |
| * At the moment, we do not use CMOS_READ anywhere outside of rtc.c, |
| * so rtc_port is static in it. This should not change unless a new |
| * hardware pops up. |
| */ |
| #define RTC_PORT(x) (rtc_port + (x)) |
| #define RTC_ALWAYS_BCD 0 |
| |
| /* Nothing to do */ |
| /* P3: Only IDE DMA may need these. */ |
| |
| #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 /* !(__SPARC_IO_H) */ |