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Diffstat (limited to 'kernel/arch/alpha/include/asm/jensen.h')
| -rw-r--r-- | kernel/arch/alpha/include/asm/jensen.h | 346 |
1 files changed, 346 insertions, 0 deletions
diff --git a/kernel/arch/alpha/include/asm/jensen.h b/kernel/arch/alpha/include/asm/jensen.h new file mode 100644 index 000000000..964b06ead --- /dev/null +++ b/kernel/arch/alpha/include/asm/jensen.h @@ -0,0 +1,346 @@ +#ifndef __ALPHA_JENSEN_H +#define __ALPHA_JENSEN_H + +#include <asm/compiler.h> + +/* + * Defines for the AlphaPC EISA IO and memory address space. + */ + +/* + * NOTE! The memory operations do not set any memory barriers, as it's + * not needed for cases like a frame buffer that is essentially memory-like. + * You need to do them by hand if the operations depend on ordering. + * + * Similarly, the port IO operations do a "mb" only after a write operation: + * if an mb is needed before (as in the case of doing memory mapped IO + * first, and then a port IO operation to the same device), it needs to be + * done by hand. + * + * After the above has bitten me 100 times, I'll give up and just do the + * mb all the time, but right now I'm hoping this will work out. Avoiding + * mb's may potentially be a noticeable speed improvement, but I can't + * honestly say I've tested it. + * + * Handling interrupts that need to do mb's to synchronize to non-interrupts + * is another fun race area. Don't do it (because if you do, I'll have to + * do *everything* with interrupts disabled, ugh). + */ + +/* + * EISA Interrupt Acknowledge address + */ +#define EISA_INTA (IDENT_ADDR + 0x100000000UL) + +/* + * FEPROM addresses + */ +#define EISA_FEPROM0 (IDENT_ADDR + 0x180000000UL) +#define EISA_FEPROM1 (IDENT_ADDR + 0x1A0000000UL) + +/* + * VL82C106 base address + */ +#define EISA_VL82C106 (IDENT_ADDR + 0x1C0000000UL) + +/* + * EISA "Host Address Extension" address (bits 25-31 of the EISA address) + */ +#define EISA_HAE (IDENT_ADDR + 0x1D0000000UL) + +/* + * "SYSCTL" register address + */ +#define EISA_SYSCTL (IDENT_ADDR + 0x1E0000000UL) + +/* + * "spare" register address + */ +#define EISA_SPARE (IDENT_ADDR + 0x1F0000000UL) + +/* + * EISA memory address offset + */ +#define EISA_MEM (IDENT_ADDR + 0x200000000UL) + +/* + * EISA IO address offset + */ +#define EISA_IO (IDENT_ADDR + 0x300000000UL) + + +#ifdef __KERNEL__ + +#ifndef __EXTERN_INLINE +#define __EXTERN_INLINE extern inline +#define __IO_EXTERN_INLINE +#endif + +/* + * Handle the "host address register". This needs to be set + * to the high 7 bits of the EISA address. This is also needed + * for EISA IO addresses, which are only 16 bits wide (the + * hae needs to be set to 0). + * + * HAE isn't needed for the local IO operations, though. + */ + +#define JENSEN_HAE_ADDRESS EISA_HAE +#define JENSEN_HAE_MASK 0x1ffffff + +__EXTERN_INLINE void jensen_set_hae(unsigned long addr) +{ + /* hae on the Jensen is bits 31:25 shifted right */ + addr >>= 25; + if (addr != alpha_mv.hae_cache) + set_hae(addr); +} + +#define vuip volatile unsigned int * + +/* + * IO functions + * + * The "local" functions are those that don't go out to the EISA bus, + * but instead act on the VL82C106 chip directly.. This is mainly the + * keyboard, RTC, printer and first two serial lines.. + * + * The local stuff makes for some complications, but it seems to be + * gone in the PCI version. I hope I can get DEC suckered^H^H^H^H^H^H^H^H + * convinced that I need one of the newer machines. + */ + +static inline unsigned int jensen_local_inb(unsigned long addr) +{ + return 0xff & *(vuip)((addr << 9) + EISA_VL82C106); +} + +static inline void jensen_local_outb(u8 b, unsigned long addr) +{ + *(vuip)((addr << 9) + EISA_VL82C106) = b; + mb(); +} + +static inline unsigned int jensen_bus_inb(unsigned long addr) +{ + long result; + + jensen_set_hae(0); + result = *(volatile int *)((addr << 7) + EISA_IO + 0x00); + return __kernel_extbl(result, addr & 3); +} + +static inline void jensen_bus_outb(u8 b, unsigned long addr) +{ + jensen_set_hae(0); + *(vuip)((addr << 7) + EISA_IO + 0x00) = b * 0x01010101; + mb(); +} + +/* + * It seems gcc is not very good at optimizing away logical + * operations that result in operations across inline functions. + * Which is why this is a macro. + */ + +#define jensen_is_local(addr) ( \ +/* keyboard */ (addr == 0x60 || addr == 0x64) || \ +/* RTC */ (addr == 0x170 || addr == 0x171) || \ +/* mb COM2 */ (addr >= 0x2f8 && addr <= 0x2ff) || \ +/* mb LPT1 */ (addr >= 0x3bc && addr <= 0x3be) || \ +/* mb COM2 */ (addr >= 0x3f8 && addr <= 0x3ff)) + +__EXTERN_INLINE u8 jensen_inb(unsigned long addr) +{ + if (jensen_is_local(addr)) + return jensen_local_inb(addr); + else + return jensen_bus_inb(addr); +} + +__EXTERN_INLINE void jensen_outb(u8 b, unsigned long addr) +{ + if (jensen_is_local(addr)) + jensen_local_outb(b, addr); + else + jensen_bus_outb(b, addr); +} + +__EXTERN_INLINE u16 jensen_inw(unsigned long addr) +{ + long result; + + jensen_set_hae(0); + result = *(volatile int *) ((addr << 7) + EISA_IO + 0x20); + result >>= (addr & 3) * 8; + return 0xffffUL & result; +} + +__EXTERN_INLINE u32 jensen_inl(unsigned long addr) +{ + jensen_set_hae(0); + return *(vuip) ((addr << 7) + EISA_IO + 0x60); +} + +__EXTERN_INLINE void jensen_outw(u16 b, unsigned long addr) +{ + jensen_set_hae(0); + *(vuip) ((addr << 7) + EISA_IO + 0x20) = b * 0x00010001; + mb(); +} + +__EXTERN_INLINE void jensen_outl(u32 b, unsigned long addr) +{ + jensen_set_hae(0); + *(vuip) ((addr << 7) + EISA_IO + 0x60) = b; + mb(); +} + +/* + * Memory functions. + */ + +__EXTERN_INLINE u8 jensen_readb(const volatile void __iomem *xaddr) +{ + unsigned long addr = (unsigned long) xaddr; + long result; + + jensen_set_hae(addr); + addr &= JENSEN_HAE_MASK; + result = *(volatile int *) ((addr << 7) + EISA_MEM + 0x00); + result >>= (addr & 3) * 8; + return 0xffUL & result; +} + +__EXTERN_INLINE u16 jensen_readw(const volatile void __iomem *xaddr) +{ + unsigned long addr = (unsigned long) xaddr; + long result; + + jensen_set_hae(addr); + addr &= JENSEN_HAE_MASK; + result = *(volatile int *) ((addr << 7) + EISA_MEM + 0x20); + result >>= (addr & 3) * 8; + return 0xffffUL & result; +} + +__EXTERN_INLINE u32 jensen_readl(const volatile void __iomem *xaddr) +{ + unsigned long addr = (unsigned long) xaddr; + jensen_set_hae(addr); + addr &= JENSEN_HAE_MASK; + return *(vuip) ((addr << 7) + EISA_MEM + 0x60); +} + +__EXTERN_INLINE u64 jensen_readq(const volatile void __iomem *xaddr) +{ + unsigned long addr = (unsigned long) xaddr; + unsigned long r0, r1; + + jensen_set_hae(addr); + addr &= JENSEN_HAE_MASK; + addr = (addr << 7) + EISA_MEM + 0x60; + r0 = *(vuip) (addr); + r1 = *(vuip) (addr + (4 << 7)); + return r1 << 32 | r0; +} + +__EXTERN_INLINE void jensen_writeb(u8 b, volatile void __iomem *xaddr) +{ + unsigned long addr = (unsigned long) xaddr; + jensen_set_hae(addr); + addr &= JENSEN_HAE_MASK; + *(vuip) ((addr << 7) + EISA_MEM + 0x00) = b * 0x01010101; +} + +__EXTERN_INLINE void jensen_writew(u16 b, volatile void __iomem *xaddr) +{ + unsigned long addr = (unsigned long) xaddr; + jensen_set_hae(addr); + addr &= JENSEN_HAE_MASK; + *(vuip) ((addr << 7) + EISA_MEM + 0x20) = b * 0x00010001; +} + +__EXTERN_INLINE void jensen_writel(u32 b, volatile void __iomem *xaddr) +{ + unsigned long addr = (unsigned long) xaddr; + jensen_set_hae(addr); + addr &= JENSEN_HAE_MASK; + *(vuip) ((addr << 7) + EISA_MEM + 0x60) = b; +} + +__EXTERN_INLINE void jensen_writeq(u64 b, volatile void __iomem *xaddr) +{ + unsigned long addr = (unsigned long) xaddr; + jensen_set_hae(addr); + addr &= JENSEN_HAE_MASK; + addr = (addr << 7) + EISA_MEM + 0x60; + *(vuip) (addr) = b; + *(vuip) (addr + (4 << 7)) = b >> 32; +} + +__EXTERN_INLINE void __iomem *jensen_ioportmap(unsigned long addr) +{ + return (void __iomem *)addr; +} + +__EXTERN_INLINE void __iomem *jensen_ioremap(unsigned long addr, + unsigned long size) +{ + return (void __iomem *)(addr + 0x100000000ul); +} + +__EXTERN_INLINE int jensen_is_ioaddr(unsigned long addr) +{ + return (long)addr >= 0; +} + +__EXTERN_INLINE int jensen_is_mmio(const volatile void __iomem *addr) +{ + return (unsigned long)addr >= 0x100000000ul; +} + +/* New-style ioread interface. All the routines are so ugly for Jensen + that it doesn't make sense to merge them. */ + +#define IOPORT(OS, NS) \ +__EXTERN_INLINE unsigned int jensen_ioread##NS(void __iomem *xaddr) \ +{ \ + if (jensen_is_mmio(xaddr)) \ + return jensen_read##OS(xaddr - 0x100000000ul); \ + else \ + return jensen_in##OS((unsigned long)xaddr); \ +} \ +__EXTERN_INLINE void jensen_iowrite##NS(u##NS b, void __iomem *xaddr) \ +{ \ + if (jensen_is_mmio(xaddr)) \ + jensen_write##OS(b, xaddr - 0x100000000ul); \ + else \ + jensen_out##OS(b, (unsigned long)xaddr); \ +} + +IOPORT(b, 8) +IOPORT(w, 16) +IOPORT(l, 32) + +#undef IOPORT + +#undef vuip + +#undef __IO_PREFIX +#define __IO_PREFIX jensen +#define jensen_trivial_rw_bw 0 +#define jensen_trivial_rw_lq 0 +#define jensen_trivial_io_bw 0 +#define jensen_trivial_io_lq 0 +#define jensen_trivial_iounmap 1 +#include <asm/io_trivial.h> + +#ifdef __IO_EXTERN_INLINE +#undef __EXTERN_INLINE +#undef __IO_EXTERN_INLINE +#endif + +#endif /* __KERNEL__ */ + +#endif /* __ALPHA_JENSEN_H */ |