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linux/arch/alpha/include/asm/core_mcpcia.h
Ivan Kokshaysky 98c532ecbe alpha: use single HAE window on T2 core logic (gamma, sable) 
T2 are the only alpha SMP systems that do HAE switching at runtime, which
is fundamentally racy on SMP.  This patch limits MMIO space on T2 to HAE0
only, like we did on MCPCIA (rawhide) long ago.  This leaves us with only
112 Mb of PCI MMIO (128 Mb HAE aperture minus 16 Mb reserved for EISA),
but since linux PCI allocations are reasonably tight, it should be enough
for sane hardware configurations.

Also, fix a typo in MCPCIA_FROB_MMIO macro which shouldn't call set_hae()
if MCPCIA_ONE_HAE_WINDOW is defined.  It's more for correctness, as
set_hae() is a no-op anyway in that case.

Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Richard Henderson <rth@twiddle.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26 16:52:12 -07:00

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#ifndef __ALPHA_MCPCIA__H__
#define __ALPHA_MCPCIA__H__
/* Define to experiment with fitting everything into one 128MB HAE window.
One window per bus, that is. */
#define MCPCIA_ONE_HAE_WINDOW 1
#include <linux/types.h>
#include <asm/compiler.h>
/*
* MCPCIA is the internal name for a core logic chipset which provides
* PCI access for the RAWHIDE family of systems.
*
* This file is based on:
*
* RAWHIDE System Programmer's Manual
* 16-May-96
* Rev. 1.4
*
*/
/*------------------------------------------------------------------------**
** **
** I/O procedures **
** **
** inport[b|w|t|l], outport[b|w|t|l] 8:16:24:32 IO xfers **
** inportbxt: 8 bits only **
** inport: alias of inportw **
** outport: alias of outportw **
** **
** inmem[b|w|t|l], outmem[b|w|t|l] 8:16:24:32 ISA memory xfers **
** inmembxt: 8 bits only **
** inmem: alias of inmemw **
** outmem: alias of outmemw **
** **
**------------------------------------------------------------------------*/
/* MCPCIA ADDRESS BIT DEFINITIONS
*
* 3333 3333 3322 2222 2222 1111 1111 11
* 9876 5432 1098 7654 3210 9876 5432 1098 7654 3210
* ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
* 1 000
* ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
* | |\|
* | Byte Enable --+ |
* | Transfer Length --+
* +-- IO space, not cached
*
* Byte Transfer
* Enable Length Transfer Byte Address
* adr<6:5> adr<4:3> Length Enable Adder
* ---------------------------------------------
* 00 00 Byte 1110 0x000
* 01 00 Byte 1101 0x020
* 10 00 Byte 1011 0x040
* 11 00 Byte 0111 0x060
*
* 00 01 Word 1100 0x008
* 01 01 Word 1001 0x028 <= Not supported in this code.
* 10 01 Word 0011 0x048
*
* 00 10 Tribyte 1000 0x010
* 01 10 Tribyte 0001 0x030
*
* 10 11 Longword 0000 0x058
*
* Note that byte enables are asserted low.
*
*/
#define MCPCIA_MAX_HOSES 4
#define MCPCIA_MID(m) ((unsigned long)(m) << 33)
/* Dodge has PCI0 and PCI1 at MID 4 and 5 respectively.
Durango adds PCI2 and PCI3 at MID 6 and 7 respectively. */
#define MCPCIA_HOSE2MID(h) ((h) + 4)
#define MCPCIA_MEM_MASK 0x07ffffff /* SPARSE Mem region mask is 27 bits */
/*
* Memory spaces:
*/
#define MCPCIA_SPARSE(m) (IDENT_ADDR + 0xf000000000UL + MCPCIA_MID(m))
#define MCPCIA_DENSE(m) (IDENT_ADDR + 0xf100000000UL + MCPCIA_MID(m))
#define MCPCIA_IO(m) (IDENT_ADDR + 0xf180000000UL + MCPCIA_MID(m))
#define MCPCIA_CONF(m) (IDENT_ADDR + 0xf1c0000000UL + MCPCIA_MID(m))
#define MCPCIA_CSR(m) (IDENT_ADDR + 0xf1e0000000UL + MCPCIA_MID(m))
#define MCPCIA_IO_IACK(m) (IDENT_ADDR + 0xf1f0000000UL + MCPCIA_MID(m))
#define MCPCIA_DENSE_IO(m) (IDENT_ADDR + 0xe1fc000000UL + MCPCIA_MID(m))
#define MCPCIA_DENSE_CONF(m) (IDENT_ADDR + 0xe1fe000000UL + MCPCIA_MID(m))
/*
* General Registers
*/
#define MCPCIA_REV(m) (MCPCIA_CSR(m) + 0x000)
#define MCPCIA_WHOAMI(m) (MCPCIA_CSR(m) + 0x040)
#define MCPCIA_PCI_LAT(m) (MCPCIA_CSR(m) + 0x080)
#define MCPCIA_CAP_CTRL(m) (MCPCIA_CSR(m) + 0x100)
#define MCPCIA_HAE_MEM(m) (MCPCIA_CSR(m) + 0x400)
#define MCPCIA_HAE_IO(m) (MCPCIA_CSR(m) + 0x440)
#define _MCPCIA_IACK_SC(m) (MCPCIA_CSR(m) + 0x480)
#define MCPCIA_HAE_DENSE(m) (MCPCIA_CSR(m) + 0x4C0)
/*
* Interrupt Control registers
*/
#define MCPCIA_INT_CTL(m) (MCPCIA_CSR(m) + 0x500)
#define MCPCIA_INT_REQ(m) (MCPCIA_CSR(m) + 0x540)
#define MCPCIA_INT_TARG(m) (MCPCIA_CSR(m) + 0x580)
#define MCPCIA_INT_ADR(m) (MCPCIA_CSR(m) + 0x5C0)
#define MCPCIA_INT_ADR_EXT(m) (MCPCIA_CSR(m) + 0x600)
#define MCPCIA_INT_MASK0(m) (MCPCIA_CSR(m) + 0x640)
#define MCPCIA_INT_MASK1(m) (MCPCIA_CSR(m) + 0x680)
#define MCPCIA_INT_ACK0(m) (MCPCIA_CSR(m) + 0x10003f00)
#define MCPCIA_INT_ACK1(m) (MCPCIA_CSR(m) + 0x10003f40)
/*
* Performance Monitor registers
*/
#define MCPCIA_PERF_MON(m) (MCPCIA_CSR(m) + 0x300)
#define MCPCIA_PERF_CONT(m) (MCPCIA_CSR(m) + 0x340)
/*
* Diagnostic Registers
*/
#define MCPCIA_CAP_DIAG(m) (MCPCIA_CSR(m) + 0x700)
#define MCPCIA_TOP_OF_MEM(m) (MCPCIA_CSR(m) + 0x7C0)
/*
* Error registers
*/
#define MCPCIA_MC_ERR0(m) (MCPCIA_CSR(m) + 0x800)
#define MCPCIA_MC_ERR1(m) (MCPCIA_CSR(m) + 0x840)
#define MCPCIA_CAP_ERR(m) (MCPCIA_CSR(m) + 0x880)
#define MCPCIA_PCI_ERR1(m) (MCPCIA_CSR(m) + 0x1040)
#define MCPCIA_MDPA_STAT(m) (MCPCIA_CSR(m) + 0x4000)
#define MCPCIA_MDPA_SYN(m) (MCPCIA_CSR(m) + 0x4040)
#define MCPCIA_MDPA_DIAG(m) (MCPCIA_CSR(m) + 0x4080)
#define MCPCIA_MDPB_STAT(m) (MCPCIA_CSR(m) + 0x8000)
#define MCPCIA_MDPB_SYN(m) (MCPCIA_CSR(m) + 0x8040)
#define MCPCIA_MDPB_DIAG(m) (MCPCIA_CSR(m) + 0x8080)
/*
* PCI Address Translation Registers.
*/
#define MCPCIA_SG_TBIA(m) (MCPCIA_CSR(m) + 0x1300)
#define MCPCIA_HBASE(m) (MCPCIA_CSR(m) + 0x1340)
#define MCPCIA_W0_BASE(m) (MCPCIA_CSR(m) + 0x1400)
#define MCPCIA_W0_MASK(m) (MCPCIA_CSR(m) + 0x1440)
#define MCPCIA_T0_BASE(m) (MCPCIA_CSR(m) + 0x1480)
#define MCPCIA_W1_BASE(m) (MCPCIA_CSR(m) + 0x1500)
#define MCPCIA_W1_MASK(m) (MCPCIA_CSR(m) + 0x1540)
#define MCPCIA_T1_BASE(m) (MCPCIA_CSR(m) + 0x1580)
#define MCPCIA_W2_BASE(m) (MCPCIA_CSR(m) + 0x1600)
#define MCPCIA_W2_MASK(m) (MCPCIA_CSR(m) + 0x1640)
#define MCPCIA_T2_BASE(m) (MCPCIA_CSR(m) + 0x1680)
#define MCPCIA_W3_BASE(m) (MCPCIA_CSR(m) + 0x1700)
#define MCPCIA_W3_MASK(m) (MCPCIA_CSR(m) + 0x1740)
#define MCPCIA_T3_BASE(m) (MCPCIA_CSR(m) + 0x1780)
/* Hack! Only words for bus 0. */
#ifndef MCPCIA_ONE_HAE_WINDOW
#define MCPCIA_HAE_ADDRESS MCPCIA_HAE_MEM(4)
#endif
#define MCPCIA_IACK_SC _MCPCIA_IACK_SC(4)
/*
* The canonical non-remaped I/O and MEM addresses have these values
* subtracted out. This is arranged so that folks manipulating ISA
* devices can use their familiar numbers and have them map to bus 0.
*/
#define MCPCIA_IO_BIAS MCPCIA_IO(4)
#define MCPCIA_MEM_BIAS MCPCIA_DENSE(4)
/* Offset between ram physical addresses and pci64 DAC bus addresses. */
#define MCPCIA_DAC_OFFSET (1UL << 40)
/*
* Data structure for handling MCPCIA machine checks:
*/
struct el_MCPCIA_uncorrected_frame_mcheck {
struct el_common header;
struct el_common_EV5_uncorrectable_mcheck procdata;
};
#ifdef __KERNEL__
#ifndef __EXTERN_INLINE
#define __EXTERN_INLINE extern inline
#define __IO_EXTERN_INLINE
#endif
/*
* I/O functions:
*
* MCPCIA, the RAWHIDE family PCI/memory support chipset for the EV5 (21164)
* and EV56 (21164a) processors, can use either a sparse address mapping
* scheme, or the so-called byte-word PCI address space, to get at PCI memory
* and I/O.
*
* Unfortunately, we can't use BWIO with EV5, so for now, we always use SPARSE.
*/
/*
* Memory functions. 64-bit and 32-bit accesses are done through
* dense memory space, everything else through sparse space.
*
* For reading and writing 8 and 16 bit quantities we need to
* go through one of the three sparse address mapping regions
* and use the HAE_MEM CSR to provide some bits of the address.
* The following few routines use only sparse address region 1
* which gives 1Gbyte of accessible space which relates exactly
* to the amount of PCI memory mapping *into* system address space.
* See p 6-17 of the specification but it looks something like this:
*
* 21164 Address:
*
* 3 2 1
* 9876543210987654321098765432109876543210
* 1ZZZZ0.PCI.QW.Address............BBLL
*
* ZZ = SBZ
* BB = Byte offset
* LL = Transfer length
*
* PCI Address:
*
* 3 2 1
* 10987654321098765432109876543210
* HHH....PCI.QW.Address........ 00
*
* HHH = 31:29 HAE_MEM CSR
*
*/
#define vip volatile int __force *
#define vuip volatile unsigned int __force *
#ifndef MCPCIA_ONE_HAE_WINDOW
#define MCPCIA_FROB_MMIO \
if (__mcpcia_is_mmio(hose)) { \
set_hae(hose & 0xffffffff); \
hose = hose - MCPCIA_DENSE(4) + MCPCIA_SPARSE(4); \
}
#else
#define MCPCIA_FROB_MMIO \
if (__mcpcia_is_mmio(hose)) { \
hose = hose - MCPCIA_DENSE(4) + MCPCIA_SPARSE(4); \
}
#endif
extern inline int __mcpcia_is_mmio(unsigned long addr)
{
return (addr & 0x80000000UL) == 0;
}
__EXTERN_INLINE unsigned int mcpcia_ioread8(void __iomem *xaddr)
{
unsigned long addr = (unsigned long)xaddr & MCPCIA_MEM_MASK;
unsigned long hose = (unsigned long)xaddr & ~MCPCIA_MEM_MASK;
unsigned long result;
MCPCIA_FROB_MMIO;
result = *(vip) ((addr << 5) + hose + 0x00);
return __kernel_extbl(result, addr & 3);
}
__EXTERN_INLINE void mcpcia_iowrite8(u8 b, void __iomem *xaddr)
{
unsigned long addr = (unsigned long)xaddr & MCPCIA_MEM_MASK;
unsigned long hose = (unsigned long)xaddr & ~MCPCIA_MEM_MASK;
unsigned long w;
MCPCIA_FROB_MMIO;
w = __kernel_insbl(b, addr & 3);
*(vuip) ((addr << 5) + hose + 0x00) = w;
}
__EXTERN_INLINE unsigned int mcpcia_ioread16(void __iomem *xaddr)
{
unsigned long addr = (unsigned long)xaddr & MCPCIA_MEM_MASK;
unsigned long hose = (unsigned long)xaddr & ~MCPCIA_MEM_MASK;
unsigned long result;
MCPCIA_FROB_MMIO;
result = *(vip) ((addr << 5) + hose + 0x08);
return __kernel_extwl(result, addr & 3);
}
__EXTERN_INLINE void mcpcia_iowrite16(u16 b, void __iomem *xaddr)
{
unsigned long addr = (unsigned long)xaddr & MCPCIA_MEM_MASK;
unsigned long hose = (unsigned long)xaddr & ~MCPCIA_MEM_MASK;
unsigned long w;
MCPCIA_FROB_MMIO;
w = __kernel_inswl(b, addr & 3);
*(vuip) ((addr << 5) + hose + 0x08) = w;
}
__EXTERN_INLINE unsigned int mcpcia_ioread32(void __iomem *xaddr)
{
unsigned long addr = (unsigned long)xaddr;
if (!__mcpcia_is_mmio(addr))
addr = ((addr & 0xffff) << 5) + (addr & ~0xfffful) + 0x18;
return *(vuip)addr;
}
__EXTERN_INLINE void mcpcia_iowrite32(u32 b, void __iomem *xaddr)
{
unsigned long addr = (unsigned long)xaddr;
if (!__mcpcia_is_mmio(addr))
addr = ((addr & 0xffff) << 5) + (addr & ~0xfffful) + 0x18;
*(vuip)addr = b;
}
__EXTERN_INLINE void __iomem *mcpcia_ioportmap(unsigned long addr)
{
return (void __iomem *)(addr + MCPCIA_IO_BIAS);
}
__EXTERN_INLINE void __iomem *mcpcia_ioremap(unsigned long addr,
unsigned long size)
{
return (void __iomem *)(addr + MCPCIA_MEM_BIAS);
}
__EXTERN_INLINE int mcpcia_is_ioaddr(unsigned long addr)
{
return addr >= MCPCIA_SPARSE(0);
}
__EXTERN_INLINE int mcpcia_is_mmio(const volatile void __iomem *xaddr)
{
unsigned long addr = (unsigned long) xaddr;
return __mcpcia_is_mmio(addr);
}
#undef MCPCIA_FROB_MMIO
#undef vip
#undef vuip
#undef __IO_PREFIX
#define __IO_PREFIX mcpcia
#define mcpcia_trivial_rw_bw 2
#define mcpcia_trivial_rw_lq 1
#define mcpcia_trivial_io_bw 0
#define mcpcia_trivial_io_lq 0
#define mcpcia_trivial_iounmap 1
#include <asm/io_trivial.h>
#ifdef __IO_EXTERN_INLINE
#undef __EXTERN_INLINE
#undef __IO_EXTERN_INLINE
#endif
#endif /* __KERNEL__ */
#endif /* __ALPHA_MCPCIA__H__ */
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