sun4v/sys/pte.h

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef _SYS_PTE_H
#define _SYS_PTE_H

#ifndef _ASM
#include <sys/types.h>
#endif /* _ASM */

#ifdef  __cplusplus
extern "C" {
#endif

#ifndef _ASM
/*
 * The tte struct is a 64 bit data type.  Since we currently plan to
 * use a V8 compiler all manipulations in C will be done using the bit fields
 * or as 2 integers.  In assembly code we will deal with it as a double (using
 * ldx and stx).  The structure is defined to force a double alignment.
 */
typedef union {
    struct tte {
        unsigned int    v:1;        /* <63> valid */
        unsigned int    nfo:1;      /* <62> non-fault only */
        unsigned int    hmenum:3;   /* <61:59> sw hmenum */
        unsigned int    no_sync:1;  /* <58> sw - ghost unload */
        unsigned int    lock:1;     /* <57> sw - locked */
        unsigned int    susp:1;     /* <56> sw - suspend? */
        unsigned int    pahi:24;    /* <55:32> pa */
        /* ------------------- */
        unsigned int    palo:19;    /* <31:13> pa */
        unsigned int    ie:1;       /* <12> 1=invert endianness */
        unsigned int    e:1;        /* <11> side effect */
        unsigned int    cp:1;       /* <10> physically cache */
        unsigned int    cv:1;       /* <9> virtually cache */
        unsigned int    p:1;        /* <8> privilege required */
        unsigned int    x:1;        /* <7> execute perm */
        unsigned int    w:1;        /* <6> write perm */
        unsigned int    ref:1;      /* <5> sw - ref */
        unsigned int    wr_perm:1;  /* <4> sw - write perm */
        unsigned int    rsvd:1;     /* <3> reserved */
        unsigned int    sz:3;       /* <2:0> pagesize */
    } tte_bit;
    struct {
        int32_t     inthi;
        uint32_t    intlo;
    } tte_int;
    uint64_t        ll;
} tte_t;

#define tte_val     tte_bit.v       /* use < 0 check in asm */
#define tte_size    tte_bit.sz
#define tte_nfo     tte_bit.nfo
#define tte_ie      tte_bit.ie      /* XXX? */
#define tte_hmenum  tte_bit.hmenum
#define tte_pahi    tte_bit.pahi
#define tte_palo    tte_bit.palo
#define tte_ref     tte_bit.ref
#define tte_wr_perm tte_bit.wr_perm
#define tte_no_sync tte_bit.no_sync
#define tte_suspend tte_bit.susp
#define tte_exec_perm   tte_bit.x
#define tte_lock    tte_bit.lock
#define tte_cp      tte_bit.cp
#define tte_cv      tte_bit.cv
#define tte_se      tte_bit.e
#define tte_priv    tte_bit.p
#define tte_hwwr    tte_bit.w

#define tte_inthi   tte_int.inthi
#define tte_intlo   tte_int.intlo

#endif /* !_ASM */

/* Defines for sz field in tte */
#define TTE8K           0x0
#define TTE64K          0x1
#define TTE512K         0x2
#define TTE4M           0x3
#define TTE32M          0x4
#define TTE256M         0x5
#define TTE2G           0x6
#define TTE16G          0x7

#define TTE_SZ_SHFT     0
#define TTE_SZ_BITS     0x7

#define TTE_CSZ(ttep)   ((ttep)->tte_size)

#define TTE_BSZS_SHIFT(sz)  ((sz) * 3)
#define TTEBYTES(sz)    (MMU_PAGESIZE << TTE_BSZS_SHIFT(sz))
#define TTEPAGES(sz)    (1 << TTE_BSZS_SHIFT(sz))
#define TTE_PAGE_SHIFT(sz)  (MMU_PAGESHIFT + TTE_BSZS_SHIFT(sz))
#define TTE_PAGE_OFFSET(sz) (TTEBYTES(sz) - 1)
#define TTE_PAGEMASK(sz)    (~TTE_PAGE_OFFSET(sz))
#define TTE_PFNMASK(sz) (~(TTE_PAGE_OFFSET(sz) >> MMU_PAGESHIFT))

#define TTE_PA_LSHIFT   8   /* used to do sllx on tte to get pa */

#ifndef _ASM

#define TTE_PASHIFT 19  /* used to manage pahi and palo */
#define TTE_PALOMASK    ((1 << TTE_PASHIFT) -1)
/* PFN is defined as bits [40-13] of the physical address */
#define TTE_TO_TTEPFN(ttep)                     \
    ((((ttep)->tte_pahi << TTE_PASHIFT) | (ttep)->tte_palo) &   \
    TTE_PFNMASK(TTE_CSZ(ttep)))
/*
 * This define adds the vaddr page offset to obtain a correct pfn
 */
#define TTE_TO_PFN(vaddr, ttep)                     \
    (sfmmu_ttetopfn(ttep, vaddr))

#define PFN_TO_TTE(entry, pfn) {            \
    entry.tte_pahi = pfn >> TTE_PASHIFT;    \
    entry.tte_palo = pfn & TTE_PALOMASK;    \
    }

#endif /* !_ASM */

/*
 * The tte defines are separated into integers because the compiler doesn't
 * support 64bit defines.
 */
/* Defines for tte using inthi */
#define TTE_VALID_INT           0x80000000
#define TTE_NFO_INT         0x40000000
#define TTE_NOSYNC_INT          0x04000000
#define TTE_SUSPEND         0x01000000
#define TTE_SUSPEND_SHIFT       32

/* Defines for tte using intlo */
#define TTE_IE_INT          0x00001000
#define TTE_SIDEFF_INT          0x00000800
#define TTE_CP_INT          0x00000400
#define TTE_CV_INT          0x00000200
#define TTE_PRIV_INT            0x00000100
#define TTE_EXECPRM_INT         0x00000080
#define TTE_HWWR_INT            0x00000040
#define TTE_REF_INT         0x00000020
#define TTE_WRPRM_INT           0x00000010

#define TTE_PROT_INT            (TTE_WRPRM_INT | TTE_PRIV_INT)

#ifndef ASM

/* Defines to help build ttes using inthi */
#define TTE_SZ_INTLO(sz)        ((sz) & TTE_SZ_BITS)
#define TTE_HMENUM_INT(hmenum)      ((hmenum) << 27)

/* PFN is defined as bits [40-13] of the physical address */
#define TTE_PFN_INTHI(pfn)      ((pfn) >> TTE_PASHIFT)
#define TTE_VALID_CHECK(attr)   \
    (((attr) & PROT_ALL) ? TTE_VALID_INT : 0)
#define TTE_NFO_CHECK(attr) \
    (((attr) & HAT_NOFAULT) ? TTE_NFO_INT : 0)

/* Defines to help build ttes using intlo */
#define TTE_PFN_INTLO(pfn)      (((pfn) & TTE_PALOMASK) << 13)
#define TTE_IE_CHECK(attr)  \
    (((attr) & HAT_STRUCTURE_LE) ? TTE_IE_INT : 0)
#define TTE_WRPRM_CHECK(attr)    \
    (((attr) & PROT_WRITE) ? TTE_WRPRM_INT : 0)
#define TTE_EXECPRM_CHECK(attr)  \
    (((attr) & PROT_EXEC) ? TTE_EXECPRM_INT : 0)
#define TTE_NOSYNC_CHECK(attr)   \
    (((attr) & HAT_NOSYNC) ? TTE_NOSYNC_INT : 0)
#define TTE_CP_CHECK(attr)  \
    (((attr) & SFMMU_UNCACHEPTTE) ? 0: TTE_CP_INT)
#define TTE_CV_CHECK(attr)  \
    (((attr) & SFMMU_UNCACHEVTTE) ? 0: TTE_CV_INT)
#define TTE_SE_CHECK(attr)  \
    (((attr) & SFMMU_SIDEFFECT) ? TTE_SIDEFF_INT : 0)
#define TTE_PRIV_CHECK(attr)    \
    (((attr) & PROT_USER) ? 0 : TTE_PRIV_INT)

#define MAKE_TTEATTR_INTHI(attr)                \
    (TTE_VALID_CHECK(attr) | TTE_NFO_CHECK(attr))

#define MAKE_TTE_INTHI(pfn, attr, sz, hmenum)           \
    (MAKE_TTEATTR_INTHI(attr) | TTE_HMENUM_INT(hmenum) |    \
    TTE_NOSYNC_CHECK(attr) | TTE_PFN_INTHI(pfn))

#define MAKE_TTEATTR_INTLO(attr)                    \
    (TTE_WRPRM_CHECK(attr) | TTE_CP_CHECK(attr) | TTE_CV_CHECK(attr) | \
    TTE_SE_CHECK(attr) | TTE_PRIV_CHECK(attr) | TTE_EXECPRM_CHECK(attr) | \
    TTE_IE_CHECK(attr))

#define MAKE_TTE_INTLO(pfn, attr, sz, hmenum)               \
    (TTE_PFN_INTLO(pfn) | TTE_REF_INT | MAKE_TTEATTR_INTLO(attr) | \
    TTE_SZ_INTLO(sz))

#define TTEINTHI_ATTR   (TTE_VALID_INT | TTE_NFO_INT | TTE_NOSYNC_INT)

#define TTEINTLO_ATTR                           \
    (TTE_IE_INT | TTE_WRPRM_INT | TTE_CP_INT | TTE_CV_INT |     \
    TTE_SIDEFF_INT | TTE_PRIV_INT | TTE_EXECPRM_INT)

#define MAKE_TTE_MASK(ttep)             \
    {                       \
        (ttep)->tte_bit.v = 1;          \
        (ttep)->tte_bit.nfo = 1;        \
        (ttep)->tte_bit.pahi = 0xffffff;    \
        (ttep)->tte_bit.palo = 0x7ffff;     \
        (ttep)->tte_bit.ie = 1;         \
        (ttep)->tte_bit.e = 1;          \
        (ttep)->tte_bit.cp = 1;         \
        (ttep)->tte_bit.cv = 1;         \
        (ttep)->tte_bit.p = 1;          \
        (ttep)->tte_bit.x = 1;          \
        (ttep)->tte_bit.w = 1;          \
        (ttep)->tte_bit.sz = 7;         \
    }

/*
 * Defines to check/set TTE bits.
 */
#define TTE_IS_VALID(ttep)  ((ttep)->tte_inthi < 0)
#define TTE_SET_INVALID(ttep)   ((ttep)->tte_val = 0)
#define TTE_IS_8K(ttep)     (TTE_CSZ(ttep) == TTE8K)
#define TTE_IS_WRITABLE(ttep)   ((ttep)->tte_wr_perm)
#define TTE_IS_EXECUTABLE(ttep) ((ttep)->tte_exec_perm)
#define TTE_IS_PRIVILEGED(ttep) ((ttep)->tte_priv)
#define TTE_IS_NOSYNC(ttep) ((ttep)->tte_no_sync)
#define TTE_IS_LOCKED(ttep) ((ttep)->tte_lock)
#define TTE_IS_SIDEFFECT(ttep)  ((ttep)->tte_se)
#define TTE_IS_NFO(ttep)    ((ttep)->tte_nfo)

#define TTE_IS_REF(ttep)    ((ttep)->tte_ref)
#define TTE_IS_MOD(ttep)    ((ttep)->tte_hwwr)
#define TTE_IS_IE(ttep)     ((ttep)->tte_ie)
#define TTE_SET_SUSPEND(ttep)   ((ttep)->tte_suspend = 1)
#define TTE_CLR_SUSPEND(ttep)   ((ttep)->tte_suspend = 0)
#define TTE_IS_SUSPEND(ttep)    ((ttep)->tte_suspend)
#define TTE_SET_REF(ttep)   ((ttep)->tte_ref = 1)
#define TTE_CLR_REF(ttep)   ((ttep)->tte_ref = 0)
#define TTE_SET_LOCKED(ttep)    ((ttep)->tte_lock = 1)
#define TTE_CLR_LOCKED(ttep)    ((ttep)->tte_lock = 0)
#define TTE_SET_MOD(ttep)   ((ttep)->tte_hwwr = 1)
#define TTE_CLR_MOD(ttep)   ((ttep)->tte_hwwr = 0)
#define TTE_SET_RM(ttep)                        \
    (((ttep)->tte_intlo) =                      \
    (ttep)->tte_intlo | TTE_HWWR_INT | TTE_REF_INT)
#define TTE_CLR_RM(ttep)                        \
    (((ttep)->tte_intlo) =                      \
    (ttep)->tte_intlo & ~(TTE_HWWR_INT | TTE_REF_INT))

#define TTE_SET_WRT(ttep)   ((ttep)->tte_wr_perm = 1)
#define TTE_CLR_WRT(ttep)   ((ttep)->tte_wr_perm = 0)
#define TTE_SET_EXEC(ttep)  ((ttep)->tte_exec_perm = 1)
#define TTE_CLR_EXEC(ttep)  ((ttep)->tte_exec_perm = 0)
#define TTE_SET_PRIV(ttep)  ((ttep)->tte_priv = 1)
#define TTE_CLR_PRIV(ttep)  ((ttep)->tte_priv = 0)

#define TTE_IS_VCACHEABLE(ttep)     ((ttep)->tte_cv)
#define TTE_SET_VCACHEABLE(ttep)    ((ttep)->tte_cv = 1)
#define TTE_CLR_VCACHEABLE(ttep)    ((ttep)->tte_cv = 0)
#define TTE_IS_PCACHEABLE(ttep)     ((ttep)->tte_cp)
#define TTE_SET_PCACHEABLE(ttep)    ((ttep)->tte_cp = 1)
#define TTE_CLR_PCACHEABLE(ttep)    ((ttep)->tte_cp = 0)


#define KPM_TTE_VCACHED(tte64, pfn, tte_sz)             \
    tte64 = ((uint64_t)TTE_VALID_INT << 32) |           \
        ((uint64_t)((tte_sz) << TTE_SZ_SHFT)) |         \
        (((pfn) >> TTE_BSZS_SHIFT(tte_sz)) <<           \
        (TTE_BSZS_SHIFT(tte_sz) + MMU_PAGESHIFT)) |         \
        (TTE_CP_INT | TTE_CV_INT | TTE_PRIV_INT | TTE_HWWR_INT)

#define KPM_TTE_VUNCACHED(tte64, pfn, tte_sz)               \
    tte64 = ((uint64_t)TTE_VALID_INT << 32) |           \
        ((uint64_t)((tte_sz) << TTE_SZ_SHFT)) |         \
        (((pfn) >> TTE_BSZS_SHIFT(tte_sz)) <<           \
        (TTE_BSZS_SHIFT(tte_sz) + MMU_PAGESHIFT)) |         \
        (TTE_CP_INT | TTE_PRIV_INT | TTE_HWWR_INT)


/*
 * This define provides a generic method to set and clear multiple tte flags.
 * A bitmask of all flags to be affected is passed in "flags" and a bitmask
 * of the new values is passed in "newflags".
 */
#define TTE_SET_LOFLAGS(ttep, flags, newflags)              \
    ((ttep)->tte_intlo = ((ttep)->tte_intlo & ~(flags)) | (newflags))

#define TTE_GET_LOFLAGS(ttep, flags)    ((ttep)->tte_intlo & flags)

#endif /* !_ASM */

#ifdef  __cplusplus
}
#endif

#endif /* !_SYS_PTE_H */