348 lines
8.4 KiB
C
Executable file
348 lines
8.4 KiB
C
Executable file
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#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 */
|