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core_t2.h

#ifndef __ALPHA_T2__H__
#define __ALPHA_T2__H__

#include <linux/types.h>
#include <linux/spinlock.h>
#include <asm/compiler.h>
#include <asm/system.h>

/*
 * T2 is the internal name for the core logic chipset which provides
 * memory controller and PCI access for the SABLE-based systems.
 *
 * This file is based on:
 *
 * SABLE I/O Specification
 * Revision/Update Information: 1.3
 *
 * jestabro@amt.tay1.dec.com Initial Version.
 *
 */

#define T2_MEM_R1_MASK 0x07ffffff  /* Mem sparse region 1 mask is 26 bits */

/* GAMMA-SABLE is a SABLE with EV5-based CPUs */
/* All LYNX machines, EV4 or EV5, use the GAMMA bias also */
#define _GAMMA_BIAS           0x8000000000UL

#if defined(CONFIG_ALPHA_GENERIC)
#define GAMMA_BIAS            alpha_mv.sys.t2.gamma_bias
#elif defined(CONFIG_ALPHA_GAMMA)
#define GAMMA_BIAS            _GAMMA_BIAS
#else
#define GAMMA_BIAS            0
#endif

/*
 * Memory spaces:
 */
#define T2_CONF                 (IDENT_ADDR + GAMMA_BIAS + 0x390000000UL)
#define T2_IO                 (IDENT_ADDR + GAMMA_BIAS + 0x3a0000000UL)
#define T2_SPARSE_MEM         (IDENT_ADDR + GAMMA_BIAS + 0x200000000UL)
#define T2_DENSE_MEM            (IDENT_ADDR + GAMMA_BIAS + 0x3c0000000UL)

#define T2_IOCSR        (IDENT_ADDR + GAMMA_BIAS + 0x38e000000UL)
#define T2_CERR1        (IDENT_ADDR + GAMMA_BIAS + 0x38e000020UL)
#define T2_CERR2        (IDENT_ADDR + GAMMA_BIAS + 0x38e000040UL)
#define T2_CERR3        (IDENT_ADDR + GAMMA_BIAS + 0x38e000060UL)
#define T2_PERR1        (IDENT_ADDR + GAMMA_BIAS + 0x38e000080UL)
#define T2_PERR2        (IDENT_ADDR + GAMMA_BIAS + 0x38e0000a0UL)
#define T2_PSCR               (IDENT_ADDR + GAMMA_BIAS + 0x38e0000c0UL)
#define T2_HAE_1        (IDENT_ADDR + GAMMA_BIAS + 0x38e0000e0UL)
#define T2_HAE_2        (IDENT_ADDR + GAMMA_BIAS + 0x38e000100UL)
#define T2_HBASE        (IDENT_ADDR + GAMMA_BIAS + 0x38e000120UL)
#define T2_WBASE1       (IDENT_ADDR + GAMMA_BIAS + 0x38e000140UL)
#define T2_WMASK1       (IDENT_ADDR + GAMMA_BIAS + 0x38e000160UL)
#define T2_TBASE1       (IDENT_ADDR + GAMMA_BIAS + 0x38e000180UL)
#define T2_WBASE2       (IDENT_ADDR + GAMMA_BIAS + 0x38e0001a0UL)
#define T2_WMASK2       (IDENT_ADDR + GAMMA_BIAS + 0x38e0001c0UL)
#define T2_TBASE2       (IDENT_ADDR + GAMMA_BIAS + 0x38e0001e0UL)
#define T2_TLBBR        (IDENT_ADDR + GAMMA_BIAS + 0x38e000200UL)
#define T2_IVR                (IDENT_ADDR + GAMMA_BIAS + 0x38e000220UL)
#define T2_HAE_3        (IDENT_ADDR + GAMMA_BIAS + 0x38e000240UL)
#define T2_HAE_4        (IDENT_ADDR + GAMMA_BIAS + 0x38e000260UL)

/* The CSRs below are T3/T4 only */
#define T2_WBASE3       (IDENT_ADDR + GAMMA_BIAS + 0x38e000280UL)
#define T2_WMASK3       (IDENT_ADDR + GAMMA_BIAS + 0x38e0002a0UL)
#define T2_TBASE3       (IDENT_ADDR + GAMMA_BIAS + 0x38e0002c0UL)

#define T2_TDR0               (IDENT_ADDR + GAMMA_BIAS + 0x38e000300UL)
#define T2_TDR1               (IDENT_ADDR + GAMMA_BIAS + 0x38e000320UL)
#define T2_TDR2               (IDENT_ADDR + GAMMA_BIAS + 0x38e000340UL)
#define T2_TDR3               (IDENT_ADDR + GAMMA_BIAS + 0x38e000360UL)
#define T2_TDR4               (IDENT_ADDR + GAMMA_BIAS + 0x38e000380UL)
#define T2_TDR5               (IDENT_ADDR + GAMMA_BIAS + 0x38e0003a0UL)
#define T2_TDR6               (IDENT_ADDR + GAMMA_BIAS + 0x38e0003c0UL)
#define T2_TDR7               (IDENT_ADDR + GAMMA_BIAS + 0x38e0003e0UL)

#define T2_WBASE4       (IDENT_ADDR + GAMMA_BIAS + 0x38e000400UL)
#define T2_WMASK4       (IDENT_ADDR + GAMMA_BIAS + 0x38e000420UL)
#define T2_TBASE4       (IDENT_ADDR + GAMMA_BIAS + 0x38e000440UL)

#define T2_AIR                (IDENT_ADDR + GAMMA_BIAS + 0x38e000460UL)
#define T2_VAR                (IDENT_ADDR + GAMMA_BIAS + 0x38e000480UL)
#define T2_DIR                (IDENT_ADDR + GAMMA_BIAS + 0x38e0004a0UL)
#define T2_ICE                (IDENT_ADDR + GAMMA_BIAS + 0x38e0004c0UL)

#define T2_HAE_ADDRESS        T2_HAE_1

/*  T2 CSRs are in the non-cachable primary IO space from 3.8000.0000 to
 3.8fff.ffff
 *
 *  +--------------+ 3 8000 0000
 *  | CPU 0 CSRs   |
 *  +--------------+ 3 8100 0000
 *  | CPU 1 CSRs   |
 *  +--------------+ 3 8200 0000
 *  | CPU 2 CSRs   |
 *  +--------------+ 3 8300 0000
 *  | CPU 3 CSRs   |
 *  +--------------+ 3 8400 0000
 *  | CPU Reserved |
 *  +--------------+ 3 8700 0000
 *  | Mem Reserved |
 *  +--------------+ 3 8800 0000
 *  | Mem 0 CSRs   |
 *  +--------------+ 3 8900 0000
 *  | Mem 1 CSRs   |
 *  +--------------+ 3 8a00 0000
 *  | Mem 2 CSRs   |
 *  +--------------+ 3 8b00 0000
 *  | Mem 3 CSRs   |
 *  +--------------+ 3 8c00 0000
 *  | Mem Reserved |
 *  +--------------+ 3 8e00 0000
 *  | PCI Bridge   |
 *  +--------------+ 3 8f00 0000
 *  | Expansion IO |
 *  +--------------+ 3 9000 0000
 *
 *
 */
#define T2_CPU0_BASE            (IDENT_ADDR + GAMMA_BIAS + 0x380000000L)
#define T2_CPU1_BASE            (IDENT_ADDR + GAMMA_BIAS + 0x381000000L)
#define T2_CPU2_BASE            (IDENT_ADDR + GAMMA_BIAS + 0x382000000L)
#define T2_CPU3_BASE            (IDENT_ADDR + GAMMA_BIAS + 0x383000000L)

#define T2_CPUn_BASE(n)       (T2_CPU0_BASE + (((n)&3) * 0x001000000L))

#define T2_MEM0_BASE            (IDENT_ADDR + GAMMA_BIAS + 0x388000000L)
#define T2_MEM1_BASE            (IDENT_ADDR + GAMMA_BIAS + 0x389000000L)
#define T2_MEM2_BASE            (IDENT_ADDR + GAMMA_BIAS + 0x38a000000L)
#define T2_MEM3_BASE            (IDENT_ADDR + GAMMA_BIAS + 0x38b000000L)


/*
 * Sable CPU Module CSRS
 *
 * These are CSRs for hardware other than the CPU chip on the CPU module.
 * The CPU module has Backup Cache control logic, Cbus control logic, and
 * interrupt control logic on it.  There is a duplicate tag store to speed
 * up maintaining cache coherency.
 */

struct sable_cpu_csr {
  unsigned long bcc;     long fill_00[3]; /* Backup Cache Control */
  unsigned long bcce;    long fill_01[3]; /* Backup Cache Correctable Error */
  unsigned long bccea;   long fill_02[3]; /* B-Cache Corr Err Address Latch */
  unsigned long bcue;    long fill_03[3]; /* B-Cache Uncorrectable Error */
  unsigned long bcuea;   long fill_04[3]; /* B-Cache Uncorr Err Addr Latch */
  unsigned long dter;    long fill_05[3]; /* Duplicate Tag Error */
  unsigned long cbctl;   long fill_06[3]; /* CBus Control */
  unsigned long cbe;     long fill_07[3]; /* CBus Error */
  unsigned long cbeal;   long fill_08[3]; /* CBus Error Addr Latch low */
  unsigned long cbeah;   long fill_09[3]; /* CBus Error Addr Latch high */
  unsigned long pmbx;    long fill_10[3]; /* Processor Mailbox */
  unsigned long ipir;    long fill_11[3]; /* Inter-Processor Int Request */
  unsigned long sic;     long fill_12[3]; /* System Interrupt Clear */
  unsigned long adlk;    long fill_13[3]; /* Address Lock (LDxL/STxC) */
  unsigned long madrl;   long fill_14[3]; /* CBus Miss Address */
  unsigned long rev;     long fill_15[3]; /* CMIC Revision */
};

/*
 * Data structure for handling T2 machine checks:
 */
struct el_t2_frame_header {
      unsigned int      elcf_fid;   /* Frame ID (from above) */
      unsigned int      elcf_size;  /* Size of frame in bytes */
};

struct el_t2_procdata_mcheck {
      unsigned long     elfmc_paltemp[32];      /* PAL TEMP REGS. */
      /* EV4-specific fields */
      unsigned long     elfmc_exc_addr;   /* Addr of excepting insn. */
      unsigned long     elfmc_exc_sum;    /* Summary of arith traps. */
      unsigned long     elfmc_exc_mask;   /* Exception mask (from exc_sum). */
      unsigned long     elfmc_iccsr;      /* IBox hardware enables. */
      unsigned long     elfmc_pal_base;   /* Base address for PALcode. */
      unsigned long     elfmc_hier; /* Hardware Interrupt Enable. */
      unsigned long     elfmc_hirr; /* Hardware Interrupt Request. */
      unsigned long     elfmc_mm_csr;     /* D-stream fault info. */
      unsigned long     elfmc_dc_stat;    /* D-cache status (ECC/Parity Err). */
      unsigned long     elfmc_dc_addr;    /* EV3 Phys Addr for ECC/DPERR. */
      unsigned long     elfmc_abox_ctl;   /* ABox Control Register. */
      unsigned long     elfmc_biu_stat;   /* BIU Status. */
      unsigned long     elfmc_biu_addr;   /* BUI Address. */
      unsigned long     elfmc_biu_ctl;    /* BIU Control. */
      unsigned long     elfmc_fill_syndrome; /* For correcting ECC errors. */
      unsigned long     elfmc_fill_addr;/* Cache block which was being read. */
      unsigned long     elfmc_va;   /* Effective VA of fault or miss. */
      unsigned long     elfmc_bc_tag;     /* Backup Cache Tag Probe Results. */
};

/*
 * Sable processor specific Machine Check Data segment.
 */

struct el_t2_logout_header {
      unsigned int      elfl_size;  /* size in bytes of logout area. */
      unsigned int      elfl_sbz1:31;     /* Should be zero. */
      unsigned int      elfl_retry:1;     /* Retry flag. */
      unsigned int      elfl_procoffset; /* Processor-specific offset. */
      unsigned int      elfl_sysoffset;    /* Offset of system-specific. */
      unsigned int      elfl_error_type;  /* PAL error type code. */
      unsigned int      elfl_frame_rev;         /* PAL Frame revision. */
};
struct el_t2_sysdata_mcheck {
      unsigned long    elcmc_bcc;         /* CSR 0 */
      unsigned long    elcmc_bcce;        /* CSR 1 */
      unsigned long    elcmc_bccea;      /* CSR 2 */
      unsigned long    elcmc_bcue;        /* CSR 3 */
      unsigned long    elcmc_bcuea;      /* CSR 4 */
      unsigned long    elcmc_dter;        /* CSR 5 */
      unsigned long    elcmc_cbctl;      /* CSR 6 */
      unsigned long    elcmc_cbe;         /* CSR 7 */
      unsigned long    elcmc_cbeal;      /* CSR 8 */
      unsigned long    elcmc_cbeah;      /* CSR 9 */
      unsigned long    elcmc_pmbx;        /* CSR 10 */
      unsigned long    elcmc_ipir;        /* CSR 11 */
      unsigned long    elcmc_sic;         /* CSR 12 */
      unsigned long    elcmc_adlk;        /* CSR 13 */
      unsigned long    elcmc_madrl;      /* CSR 14 */
      unsigned long    elcmc_crrev4;     /* CSR 15 */
};

/*
 * Sable memory error frame - sable pfms section 3.42
 */
struct el_t2_data_memory {
      struct      el_t2_frame_header elcm_hdr;  /* ID$MEM-FERR = 0x08 */
      unsigned int  elcm_module;    /* Module id. */
      unsigned int  elcm_res04;     /* Reserved. */
      unsigned long elcm_merr;      /* CSR0: Error Reg 1. */
      unsigned long elcm_mcmd1;     /* CSR1: Command Trap 1. */
      unsigned long elcm_mcmd2;     /* CSR2: Command Trap 2. */
      unsigned long elcm_mconf;     /* CSR3: Configuration. */
      unsigned long elcm_medc1;     /* CSR4: EDC Status 1. */
      unsigned long elcm_medc2;     /* CSR5: EDC Status 2. */
      unsigned long elcm_medcc;     /* CSR6: EDC Control. */
      unsigned long elcm_msctl;     /* CSR7: Stream Buffer Control. */
      unsigned long elcm_mref;      /* CSR8: Refresh Control. */
      unsigned long elcm_filter;    /* CSR9: CRD Filter Control. */
};


/*
 * Sable other CPU error frame - sable pfms section 3.43
 */
struct el_t2_data_other_cpu {
      short       elco_cpuid; /* CPU ID */
      short       elco_res02[3];
      unsigned long elco_bcc; /* CSR 0 */
      unsigned long elco_bcce;      /* CSR 1 */
      unsigned long elco_bccea;     /* CSR 2 */
      unsigned long elco_bcue;      /* CSR 3 */
      unsigned long elco_bcuea;     /* CSR 4 */
      unsigned long elco_dter;      /* CSR 5 */
      unsigned long elco_cbctl;     /* CSR 6 */
      unsigned long elco_cbe; /* CSR 7 */
      unsigned long elco_cbeal;     /* CSR 8 */
      unsigned long elco_cbeah;     /* CSR 9 */
      unsigned long elco_pmbx;      /* CSR 10 */
      unsigned long elco_ipir;      /* CSR 11 */
      unsigned long elco_sic; /* CSR 12 */
      unsigned long elco_adlk;      /* CSR 13 */
      unsigned long elco_madrl;     /* CSR 14 */
      unsigned long elco_crrev4;    /* CSR 15 */
};

/*
 * Sable other CPU error frame - sable pfms section 3.44
 */
struct el_t2_data_t2{
      struct el_t2_frame_header elct_hdr; /* ID$T2-FRAME */
      unsigned long elct_iocsr;     /* IO Control and Status Register */
      unsigned long elct_cerr1;     /* Cbus Error Register 1 */
      unsigned long elct_cerr2;     /* Cbus Error Register 2 */
      unsigned long elct_cerr3;     /* Cbus Error Register 3 */
      unsigned long elct_perr1;     /* PCI Error Register 1 */
      unsigned long elct_perr2;     /* PCI Error Register 2 */
      unsigned long elct_hae0_1;    /* High Address Extension Register 1 */
      unsigned long elct_hae0_2;    /* High Address Extension Register 2 */
      unsigned long elct_hbase;     /* High Base Register */
      unsigned long elct_wbase1;    /* Window Base Register 1 */
      unsigned long elct_wmask1;    /* Window Mask Register 1 */
      unsigned long elct_tbase1;    /* Translated Base Register 1 */
      unsigned long elct_wbase2;    /* Window Base Register 2 */
      unsigned long elct_wmask2;    /* Window Mask Register 2 */
      unsigned long elct_tbase2;    /* Translated Base Register 2 */
      unsigned long elct_tdr0;      /* TLB Data Register 0 */
      unsigned long elct_tdr1;      /* TLB Data Register 1 */
      unsigned long elct_tdr2;      /* TLB Data Register 2 */
      unsigned long elct_tdr3;      /* TLB Data Register 3 */
      unsigned long elct_tdr4;      /* TLB Data Register 4 */
      unsigned long elct_tdr5;      /* TLB Data Register 5 */
      unsigned long elct_tdr6;      /* TLB Data Register 6 */
      unsigned long elct_tdr7;      /* TLB Data Register 7 */
};

/*
 * Sable error log data structure - sable pfms section 3.40
 */
struct el_t2_data_corrected {
      unsigned long elcpb_biu_stat;
      unsigned long elcpb_biu_addr;
      unsigned long elcpb_biu_ctl;
      unsigned long elcpb_fill_syndrome;
      unsigned long elcpb_fill_addr;
      unsigned long elcpb_bc_tag;
};

/*
 * Sable error log data structure
 * Note there are 4 memory slots on sable (see t2.h)
 */
struct el_t2_frame_mcheck {
      struct el_t2_frame_header elfmc_header;   /* ID$P-FRAME_MCHECK */
      struct el_t2_logout_header elfmc_hdr;
      struct el_t2_procdata_mcheck elfmc_procdata;
      struct el_t2_sysdata_mcheck elfmc_sysdata;
      struct el_t2_data_t2 elfmc_t2data;
      struct el_t2_data_memory elfmc_memdata[4];
      struct el_t2_frame_header elfmc_footer;   /* empty */
};


/*
 * Sable error log data structures on memory errors
 */
struct el_t2_frame_corrected {
      struct el_t2_frame_header elfcc_header;   /* ID$P-BC-COR */
      struct el_t2_logout_header elfcc_hdr;
      struct el_t2_data_corrected elfcc_procdata;
/*    struct el_t2_data_t2 elfcc_t2data;        */
/*    struct el_t2_data_memory elfcc_memdata[4];      */
      struct el_t2_frame_header elfcc_footer;   /* empty */
};


#ifdef __KERNEL__

#ifndef __EXTERN_INLINE
#define __EXTERN_INLINE extern inline
#define __IO_EXTERN_INLINE
#endif

/*
 * I/O functions:
 *
 * T2 (the core logic PCI/memory support chipset for the SABLE
 * series of processors uses a sparse address mapping scheme to
 * get at PCI memory and I/O.
 */

#define vip volatile int *
#define vuip      volatile unsigned int *

extern inline u8 t2_inb(unsigned long addr)
{
      long result = *(vip) ((addr << 5) + T2_IO + 0x00);
      return __kernel_extbl(result, addr & 3);
}

extern inline void t2_outb(u8 b, unsigned long addr)
{
      unsigned long w;

      w = __kernel_insbl(b, addr & 3);
      *(vuip) ((addr << 5) + T2_IO + 0x00) = w;
      mb();
}

extern inline u16 t2_inw(unsigned long addr)
{
      long result = *(vip) ((addr << 5) + T2_IO + 0x08);
      return __kernel_extwl(result, addr & 3);
}

extern inline void t2_outw(u16 b, unsigned long addr)
{
      unsigned long w;

      w = __kernel_inswl(b, addr & 3);
      *(vuip) ((addr << 5) + T2_IO + 0x08) = w;
      mb();
}

extern inline u32 t2_inl(unsigned long addr)
{
      return *(vuip) ((addr << 5) + T2_IO + 0x18);
}

extern inline void t2_outl(u32 b, unsigned long addr)
{
      *(vuip) ((addr << 5) + T2_IO + 0x18) = b;
      mb();
}


/*
 * Memory functions.
 *
 * 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 t2_set_hae { \
      msb = addr  >> 27; \
      addr &= T2_MEM_R1_MASK; \
      set_hae(msb); \
}

extern spinlock_t t2_hae_lock;

/*
 * NOTE: take T2_DENSE_MEM off in each readX/writeX routine, since
 *       they may be called directly, rather than through the
 *       ioreadNN/iowriteNN routines.
 */

__EXTERN_INLINE u8 t2_readb(const volatile void __iomem *xaddr)
{
      unsigned long addr = (unsigned long) xaddr - T2_DENSE_MEM;
      unsigned long result, msb;
      unsigned long flags;
      spin_lock_irqsave(&t2_hae_lock, flags);

      t2_set_hae;

      result = *(vip) ((addr << 5) + T2_SPARSE_MEM + 0x00);
      spin_unlock_irqrestore(&t2_hae_lock, flags);
      return __kernel_extbl(result, addr & 3);
}

__EXTERN_INLINE u16 t2_readw(const volatile void __iomem *xaddr)
{
      unsigned long addr = (unsigned long) xaddr - T2_DENSE_MEM;
      unsigned long result, msb;
      unsigned long flags;
      spin_lock_irqsave(&t2_hae_lock, flags);

      t2_set_hae;

      result = *(vuip) ((addr << 5) + T2_SPARSE_MEM + 0x08);
      spin_unlock_irqrestore(&t2_hae_lock, flags);
      return __kernel_extwl(result, addr & 3);
}

/*
 * On SABLE with T2, we must use SPARSE memory even for 32-bit access,
 * because we cannot access all of DENSE without changing its HAE.
 */
__EXTERN_INLINE u32 t2_readl(const volatile void __iomem *xaddr)
{
      unsigned long addr = (unsigned long) xaddr - T2_DENSE_MEM;
      unsigned long result, msb;
      unsigned long flags;
      spin_lock_irqsave(&t2_hae_lock, flags);

      t2_set_hae;

      result = *(vuip) ((addr << 5) + T2_SPARSE_MEM + 0x18);
      spin_unlock_irqrestore(&t2_hae_lock, flags);
      return result & 0xffffffffUL;
}

__EXTERN_INLINE u64 t2_readq(const volatile void __iomem *xaddr)
{
      unsigned long addr = (unsigned long) xaddr - T2_DENSE_MEM;
      unsigned long r0, r1, work, msb;
      unsigned long flags;
      spin_lock_irqsave(&t2_hae_lock, flags);

      t2_set_hae;

      work = (addr << 5) + T2_SPARSE_MEM + 0x18;
      r0 = *(vuip)(work);
      r1 = *(vuip)(work + (4 << 5));
      spin_unlock_irqrestore(&t2_hae_lock, flags);
      return r1 << 32 | r0;
}

__EXTERN_INLINE void t2_writeb(u8 b, volatile void __iomem *xaddr)
{
      unsigned long addr = (unsigned long) xaddr - T2_DENSE_MEM;
      unsigned long msb, w;
      unsigned long flags;
      spin_lock_irqsave(&t2_hae_lock, flags);

      t2_set_hae;

      w = __kernel_insbl(b, addr & 3);
      *(vuip) ((addr << 5) + T2_SPARSE_MEM + 0x00) = w;
      spin_unlock_irqrestore(&t2_hae_lock, flags);
}

__EXTERN_INLINE void t2_writew(u16 b, volatile void __iomem *xaddr)
{
      unsigned long addr = (unsigned long) xaddr - T2_DENSE_MEM;
      unsigned long msb, w;
      unsigned long flags;
      spin_lock_irqsave(&t2_hae_lock, flags);

      t2_set_hae;

      w = __kernel_inswl(b, addr & 3);
      *(vuip) ((addr << 5) + T2_SPARSE_MEM + 0x08) = w;
      spin_unlock_irqrestore(&t2_hae_lock, flags);
}

/*
 * On SABLE with T2, we must use SPARSE memory even for 32-bit access,
 * because we cannot access all of DENSE without changing its HAE.
 */
__EXTERN_INLINE void t2_writel(u32 b, volatile void __iomem *xaddr)
{
      unsigned long addr = (unsigned long) xaddr - T2_DENSE_MEM;
      unsigned long msb;
      unsigned long flags;
      spin_lock_irqsave(&t2_hae_lock, flags);

      t2_set_hae;

      *(vuip) ((addr << 5) + T2_SPARSE_MEM + 0x18) = b;
      spin_unlock_irqrestore(&t2_hae_lock, flags);
}

__EXTERN_INLINE void t2_writeq(u64 b, volatile void __iomem *xaddr)
{
      unsigned long addr = (unsigned long) xaddr - T2_DENSE_MEM;
      unsigned long msb, work;
      unsigned long flags;
      spin_lock_irqsave(&t2_hae_lock, flags);

      t2_set_hae;

      work = (addr << 5) + T2_SPARSE_MEM + 0x18;
      *(vuip)work = b;
      *(vuip)(work + (4 << 5)) = b >> 32;
      spin_unlock_irqrestore(&t2_hae_lock, flags);
}

__EXTERN_INLINE void __iomem *t2_ioportmap(unsigned long addr)
{
      return (void __iomem *)(addr + T2_IO);
}

__EXTERN_INLINE void __iomem *t2_ioremap(unsigned long addr, 
                               unsigned long size)
{
      return (void __iomem *)(addr + T2_DENSE_MEM);
}

__EXTERN_INLINE int t2_is_ioaddr(unsigned long addr)
{
      return (long)addr >= 0;
}

__EXTERN_INLINE int t2_is_mmio(const volatile void __iomem *addr)
{
      return (unsigned long)addr >= T2_DENSE_MEM;
}

/* New-style ioread interface.  The mmio routines are so ugly for T2 that
   it doesn't make sense to merge the pio and mmio routines.  */

#define IOPORT(OS, NS)                                      \
__EXTERN_INLINE unsigned int t2_ioread##NS(void __iomem *xaddr)         \
{                                                     \
      if (t2_is_mmio(xaddr))                                \
            return t2_read##OS(xaddr);                      \
      else                                            \
            return t2_in##OS((unsigned long)xaddr - T2_IO);       \
}                                                     \
__EXTERN_INLINE void t2_iowrite##NS(u##NS b, void __iomem *xaddr) \
{                                                     \
      if (t2_is_mmio(xaddr))                                \
            t2_write##OS(b, xaddr);                         \
      else                                            \
            t2_out##OS(b, (unsigned long)xaddr - T2_IO);          \
}

IOPORT(b, 8)
IOPORT(w, 16)
IOPORT(l, 32)

#undef IOPORT

#undef vip
#undef vuip

#undef __IO_PREFIX
#define __IO_PREFIX           t2
#define t2_trivial_rw_bw      0
#define t2_trivial_rw_lq      0
#define t2_trivial_io_bw      0
#define t2_trivial_io_lq      0
#define t2_trivial_iounmap    1
#include <asm/io_trivial.h>

#ifdef __IO_EXTERN_INLINE
#undef __EXTERN_INLINE
#undef __IO_EXTERN_INLINE
#endif

#endif /* __KERNEL__ */

#endif /* __ALPHA_T2__H__ */

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