348 lines
8.4 KiB
C
348 lines
8.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ALPHA_JENSEN_H
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#define __ALPHA_JENSEN_H
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#include <asm/compiler.h>
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/*
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* Defines for the AlphaPC EISA IO and memory address space.
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*/
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/*
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* NOTE! The memory operations do not set any memory barriers, as it's
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* not needed for cases like a frame buffer that is essentially memory-like.
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* You need to do them by hand if the operations depend on ordering.
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*
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* Similarly, the port IO operations do a "mb" only after a write operation:
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* if an mb is needed before (as in the case of doing memory mapped IO
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* first, and then a port IO operation to the same device), it needs to be
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* done by hand.
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*
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* After the above has bitten me 100 times, I'll give up and just do the
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* mb all the time, but right now I'm hoping this will work out. Avoiding
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* mb's may potentially be a noticeable speed improvement, but I can't
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* honestly say I've tested it.
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*
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* Handling interrupts that need to do mb's to synchronize to non-interrupts
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* is another fun race area. Don't do it (because if you do, I'll have to
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* do *everything* with interrupts disabled, ugh).
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*/
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/*
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* EISA Interrupt Acknowledge address
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*/
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#define EISA_INTA (IDENT_ADDR + 0x100000000UL)
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/*
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* FEPROM addresses
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*/
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#define EISA_FEPROM0 (IDENT_ADDR + 0x180000000UL)
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#define EISA_FEPROM1 (IDENT_ADDR + 0x1A0000000UL)
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/*
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* VL82C106 base address
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*/
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#define EISA_VL82C106 (IDENT_ADDR + 0x1C0000000UL)
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/*
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* EISA "Host Address Extension" address (bits 25-31 of the EISA address)
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*/
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#define EISA_HAE (IDENT_ADDR + 0x1D0000000UL)
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/*
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* "SYSCTL" register address
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*/
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#define EISA_SYSCTL (IDENT_ADDR + 0x1E0000000UL)
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/*
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* "spare" register address
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*/
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#define EISA_SPARE (IDENT_ADDR + 0x1F0000000UL)
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/*
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* EISA memory address offset
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*/
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#define EISA_MEM (IDENT_ADDR + 0x200000000UL)
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/*
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* EISA IO address offset
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*/
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#define EISA_IO (IDENT_ADDR + 0x300000000UL)
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#ifdef __KERNEL__
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#ifndef __EXTERN_INLINE
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#define __EXTERN_INLINE extern inline
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#define __IO_EXTERN_INLINE
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#endif
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/*
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* Handle the "host address register". This needs to be set
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* to the high 7 bits of the EISA address. This is also needed
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* for EISA IO addresses, which are only 16 bits wide (the
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* hae needs to be set to 0).
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*
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* HAE isn't needed for the local IO operations, though.
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*/
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#define JENSEN_HAE_ADDRESS EISA_HAE
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#define JENSEN_HAE_MASK 0x1ffffff
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__EXTERN_INLINE void jensen_set_hae(unsigned long addr)
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{
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/* hae on the Jensen is bits 31:25 shifted right */
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addr >>= 25;
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if (addr != alpha_mv.hae_cache)
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set_hae(addr);
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}
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#define vuip volatile unsigned int *
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/*
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* IO functions
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*
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* The "local" functions are those that don't go out to the EISA bus,
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* but instead act on the VL82C106 chip directly.. This is mainly the
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* keyboard, RTC, printer and first two serial lines..
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*
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* The local stuff makes for some complications, but it seems to be
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* gone in the PCI version. I hope I can get DEC suckered^H^H^H^H^H^H^H^H
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* convinced that I need one of the newer machines.
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*/
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static inline unsigned int jensen_local_inb(unsigned long addr)
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{
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return 0xff & *(vuip)((addr << 9) + EISA_VL82C106);
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}
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static inline void jensen_local_outb(u8 b, unsigned long addr)
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{
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*(vuip)((addr << 9) + EISA_VL82C106) = b;
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mb();
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}
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static inline unsigned int jensen_bus_inb(unsigned long addr)
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{
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long result;
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jensen_set_hae(0);
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result = *(volatile int *)((addr << 7) + EISA_IO + 0x00);
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return __kernel_extbl(result, addr & 3);
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}
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static inline void jensen_bus_outb(u8 b, unsigned long addr)
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{
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jensen_set_hae(0);
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*(vuip)((addr << 7) + EISA_IO + 0x00) = b * 0x01010101;
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mb();
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}
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/*
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* It seems gcc is not very good at optimizing away logical
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* operations that result in operations across inline functions.
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* Which is why this is a macro.
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*/
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#define jensen_is_local(addr) ( \
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/* keyboard */ (addr == 0x60 || addr == 0x64) || \
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/* RTC */ (addr == 0x170 || addr == 0x171) || \
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/* mb COM2 */ (addr >= 0x2f8 && addr <= 0x2ff) || \
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/* mb LPT1 */ (addr >= 0x3bc && addr <= 0x3be) || \
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/* mb COM2 */ (addr >= 0x3f8 && addr <= 0x3ff))
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__EXTERN_INLINE u8 jensen_inb(unsigned long addr)
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{
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if (jensen_is_local(addr))
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return jensen_local_inb(addr);
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else
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return jensen_bus_inb(addr);
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}
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__EXTERN_INLINE void jensen_outb(u8 b, unsigned long addr)
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{
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if (jensen_is_local(addr))
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jensen_local_outb(b, addr);
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else
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jensen_bus_outb(b, addr);
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}
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__EXTERN_INLINE u16 jensen_inw(unsigned long addr)
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{
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long result;
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jensen_set_hae(0);
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result = *(volatile int *) ((addr << 7) + EISA_IO + 0x20);
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result >>= (addr & 3) * 8;
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return 0xffffUL & result;
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}
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__EXTERN_INLINE u32 jensen_inl(unsigned long addr)
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{
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jensen_set_hae(0);
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return *(vuip) ((addr << 7) + EISA_IO + 0x60);
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}
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__EXTERN_INLINE void jensen_outw(u16 b, unsigned long addr)
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{
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jensen_set_hae(0);
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*(vuip) ((addr << 7) + EISA_IO + 0x20) = b * 0x00010001;
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mb();
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}
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__EXTERN_INLINE void jensen_outl(u32 b, unsigned long addr)
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{
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jensen_set_hae(0);
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*(vuip) ((addr << 7) + EISA_IO + 0x60) = b;
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mb();
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}
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/*
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* Memory functions.
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*/
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__EXTERN_INLINE u8 jensen_readb(const volatile void __iomem *xaddr)
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{
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unsigned long addr = (unsigned long) xaddr;
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long result;
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jensen_set_hae(addr);
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addr &= JENSEN_HAE_MASK;
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result = *(volatile int *) ((addr << 7) + EISA_MEM + 0x00);
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result >>= (addr & 3) * 8;
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return 0xffUL & result;
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}
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__EXTERN_INLINE u16 jensen_readw(const volatile void __iomem *xaddr)
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{
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unsigned long addr = (unsigned long) xaddr;
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long result;
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jensen_set_hae(addr);
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addr &= JENSEN_HAE_MASK;
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result = *(volatile int *) ((addr << 7) + EISA_MEM + 0x20);
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result >>= (addr & 3) * 8;
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return 0xffffUL & result;
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}
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__EXTERN_INLINE u32 jensen_readl(const volatile void __iomem *xaddr)
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{
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unsigned long addr = (unsigned long) xaddr;
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jensen_set_hae(addr);
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addr &= JENSEN_HAE_MASK;
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return *(vuip) ((addr << 7) + EISA_MEM + 0x60);
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}
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__EXTERN_INLINE u64 jensen_readq(const volatile void __iomem *xaddr)
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{
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unsigned long addr = (unsigned long) xaddr;
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unsigned long r0, r1;
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jensen_set_hae(addr);
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addr &= JENSEN_HAE_MASK;
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addr = (addr << 7) + EISA_MEM + 0x60;
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r0 = *(vuip) (addr);
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r1 = *(vuip) (addr + (4 << 7));
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return r1 << 32 | r0;
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}
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__EXTERN_INLINE void jensen_writeb(u8 b, volatile void __iomem *xaddr)
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{
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unsigned long addr = (unsigned long) xaddr;
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jensen_set_hae(addr);
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addr &= JENSEN_HAE_MASK;
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*(vuip) ((addr << 7) + EISA_MEM + 0x00) = b * 0x01010101;
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}
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__EXTERN_INLINE void jensen_writew(u16 b, volatile void __iomem *xaddr)
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{
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unsigned long addr = (unsigned long) xaddr;
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jensen_set_hae(addr);
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addr &= JENSEN_HAE_MASK;
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*(vuip) ((addr << 7) + EISA_MEM + 0x20) = b * 0x00010001;
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}
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__EXTERN_INLINE void jensen_writel(u32 b, volatile void __iomem *xaddr)
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{
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unsigned long addr = (unsigned long) xaddr;
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jensen_set_hae(addr);
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addr &= JENSEN_HAE_MASK;
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*(vuip) ((addr << 7) + EISA_MEM + 0x60) = b;
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}
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__EXTERN_INLINE void jensen_writeq(u64 b, volatile void __iomem *xaddr)
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{
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unsigned long addr = (unsigned long) xaddr;
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jensen_set_hae(addr);
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addr &= JENSEN_HAE_MASK;
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addr = (addr << 7) + EISA_MEM + 0x60;
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*(vuip) (addr) = b;
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*(vuip) (addr + (4 << 7)) = b >> 32;
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}
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__EXTERN_INLINE void __iomem *jensen_ioportmap(unsigned long addr)
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{
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return (void __iomem *)addr;
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}
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__EXTERN_INLINE void __iomem *jensen_ioremap(unsigned long addr,
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unsigned long size)
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{
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return (void __iomem *)(addr + 0x100000000ul);
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}
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__EXTERN_INLINE int jensen_is_ioaddr(unsigned long addr)
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{
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return (long)addr >= 0;
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}
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__EXTERN_INLINE int jensen_is_mmio(const volatile void __iomem *addr)
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{
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return (unsigned long)addr >= 0x100000000ul;
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}
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/* New-style ioread interface. All the routines are so ugly for Jensen
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that it doesn't make sense to merge them. */
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#define IOPORT(OS, NS) \
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__EXTERN_INLINE unsigned int jensen_ioread##NS(void __iomem *xaddr) \
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{ \
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if (jensen_is_mmio(xaddr)) \
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return jensen_read##OS(xaddr - 0x100000000ul); \
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else \
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return jensen_in##OS((unsigned long)xaddr); \
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} \
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__EXTERN_INLINE void jensen_iowrite##NS(u##NS b, void __iomem *xaddr) \
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{ \
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if (jensen_is_mmio(xaddr)) \
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jensen_write##OS(b, xaddr - 0x100000000ul); \
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else \
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jensen_out##OS(b, (unsigned long)xaddr); \
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}
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IOPORT(b, 8)
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IOPORT(w, 16)
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IOPORT(l, 32)
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#undef IOPORT
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#undef vuip
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#undef __IO_PREFIX
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#define __IO_PREFIX jensen
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#define jensen_trivial_rw_bw 0
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#define jensen_trivial_rw_lq 0
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#define jensen_trivial_io_bw 0
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#define jensen_trivial_io_lq 0
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#define jensen_trivial_iounmap 1
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#include <asm/io_trivial.h>
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#ifdef __IO_EXTERN_INLINE
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#undef __EXTERN_INLINE
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#undef __IO_EXTERN_INLINE
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#endif
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#endif /* __KERNEL__ */
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#endif /* __ALPHA_JENSEN_H */
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