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/* $OpenBSD: pte.h,v 1.4 2003/05/17 19:30:55 art Exp $ */
/* $NetBSD: pte.h,v 1.7 2001/07/31 06:55:46 eeh Exp $ */
/*
* Copyright (c) 1996-1999 Eduardo Horvath
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
/*
* Address translation works as follows:
*
**
* For sun4u:
*
* Take your pick; it's all S/W anyway. We'll start by emulating a sun4.
* Oh, here's the sun4u TTE for reference:
*
* struct sun4u_tte {
* u_int64 tag_g:1, (global flag)
* tag_ctxt:15, (context for mapping)
* tag_unassigned:6,
* tag_va:42; (virtual address bits<64:22>)
* u_int64 data_v:1, (valid bit)
* data_size:2, (page size [8K*8**<SIZE>])
* data_nfo:1, (no-fault only)
* data_ie:1, (invert endianness [inefficient])
* data_soft2:2, (reserved for S/W)
* data_pa:36, (physical address)
* data_soft:6, (reserved for S/W)
* data_lock:1, (lock into TLB)
* data_cacheable:2, (cacheability control)
* data_e:1, (explicit accesses only)
* data_priv:1, (privileged page)
* data_w:1, (writeable)
* data_g:1; (same as tag_g)
* };
*/
/* virtual address to virtual page number */
#define VA_SUN4U_VPG(va) (((int)(va) >> 13) & 31)
/* virtual address to offset within page */
#define VA_SUN4U_OFF(va) (((int)(va)) & 0x1FFF)
/* When we go to 64-bit VAs we need to handle the hole */
#define VA_VPG(va) VA_SUN4U_VPG(va)
#define VA_OFF(va) VA_SUN4U_OFF(va)
#define PG_SHIFT4U 13
#define MMU_PAGE_ALIGN 8192
/* If you know where a tte is in the tsb, how do you find its va? */
#define TSBVA(i) ((tsb[(i)].tag.f.tag_va<<22)|(((i)<<13)&0x3ff000))
#ifndef _LOCORE
/*
* This is the spitfire TTE.
*
* We could use bitmasks and shifts to construct this if
* we had a 64-bit compiler w/64-bit longs. Otherwise it's
* a real pain to do this in C.
*/
#if 0
/* We don't use bitfeilds anyway. */
struct sun4u_tag_fields {
u_int64_t tag_g:1, /* global flag */
tag_ctxt:15, /* context for mapping */
tag_unassigned:6,
tag_va:42; /* virtual address bits<64:22> */
};
union sun4u_tag { struct sun4u_tag_fields f; int64_t tag; };
struct sun4u_data_fields {
u_int64_t data_v:1, /* valid bit */
data_size:2, /* page size [8K*8**<SIZE>] */
data_nfo:1, /* no-fault only */
data_ie:1, /* invert endianness [inefficient] */
data_soft2:2, /* reserved for S/W */
data_pa:36, /* physical address */
data_accessed:1,/* S/W accessed bit */
data_modified:1,/* S/W modified bit */
data_realw:1, /* S/W real writable bit (to manage modified) */
data_tsblock:1, /* S/W TSB locked entry */
data_exec:1, /* S/W Executable */
data_onlyexec:1,/* S/W Executable only */
data_lock:1, /* lock into TLB */
data_cacheable:2, /* cacheability control */
data_e:1, /* explicit accesses only */
data_priv:1, /* privileged page */
data_w:1, /* writeable */
data_g:1; /* same as tag_g */
};
union sun4u_data { struct sun4u_data_fields f; int64_t data; };
struct sun4u_tte {
union sun4u_tag tag;
union sun4u_data data;
};
#else
struct sun4u_tte {
int64_t tag;
int64_t data;
};
#endif
typedef struct sun4u_tte pte_t;
/* Assembly routine to flush a mapping */
extern void tlb_flush_pte(vaddr_t addr, int ctx);
extern void tlb_flush_ctx(int ctx);
#endif /* _LOCORE */
/* TSB tag masks */
#define CTX_MASK ((1<<13)-1)
#define TSB_TAG_CTX_SHIFT 48
#define TSB_TAG_VA_SHIFT 22
#define TSB_TAG_G 0x8000000000000000LL
#define TSB_TAG_CTX(t) ((((int64_t)(t))>>TSB_TAG_CTX_SHIFT)&CTX_MASK)
#define TSB_TAG_VA(t) ((((int64_t)(t))<<TSB_TAG_VA_SHIFT))
#define TSB_TAG(g,ctx,va) ((((u_int64_t)((g)!=0))<<63)|(((u_int64_t)(ctx)&CTX_MASK)<<TSB_TAG_CTX_SHIFT)|(((u_int64_t)va)>>TSB_TAG_VA_SHIFT))
/* Page sizes */
#define PGSZ_8K 0
#define PGSZ_64K 1
#define PGSZ_512K 2
#define PGSZ_4M 3
#define PGSZ_SHIFT 61
/*
* Why couldn't Sun pick better page sizes?
*
* Page sizes are 2**(12+(3*sz)), except for 8K which
* is 2**12+1 instead of 2**12.
*/
#define PG_SZ(s) (1<<(12+(s?(3*s):1)))
#define TLB_SZ(s) (((uint64_t)(s))<<PGSZ_SHIFT)
/* TLB data masks */
#define TLB_V 0x8000000000000000LL
#define TLB_8K TLB_SZ(PGSZ_8K)
#define TLB_64K TLB_SZ(PGSZ_64K)
#define TLB_512K TLB_SZ(PGSZ_512K)
#define TLB_4M TLB_SZ(PGSZ_4M)
#define TLB_SZ_MASK 0x6000000000000000LL
#define TLB_NFO 0x1000000000000000LL
#define TLB_IE 0x0800000000000000LL
#define TLB_SOFT2_MASK 0x07fe000000000000LL
#define TLB_DIAG_MASK 0x0001fe0000000000LL
#define TLB_PA_MASK 0x000001ffffffe000LL
#define TLB_SOFT_MASK 0x0000000000001f80LL
/* S/W bits */
/* Access & TSB locked bits are swapped so I can set access w/one insn */
/* #define TLB_ACCESS 0x0000000000001000LL */
#define TLB_ACCESS 0x0000000000000200LL
#define TLB_MODIFY 0x0000000000000800LL
#define TLB_REAL_W 0x0000000000000400LL
/* #define TLB_TSB_LOCK 0x0000000000000200LL */
#define TLB_TSB_LOCK 0x0000000000001000LL
#define TLB_EXEC 0x0000000000000100LL
#define TLB_EXEC_ONLY 0x0000000000000080LL
/* H/W bits */
#define TLB_L 0x0000000000000040LL
#define TLB_CACHE_MASK 0x0000000000000030LL
#define TLB_CP 0x0000000000000020LL
#define TLB_CV 0x0000000000000010LL
#define TLB_E 0x0000000000000008LL
#define TLB_P 0x0000000000000004LL
#define TLB_W 0x0000000000000002LL
#define TLB_G 0x0000000000000001LL
#define TSB_DATA(g,sz,pa,priv,write,cache,aliased,valid,ie) \
(((valid)?TLB_V:0LL)|TLB_SZ(sz)|(((u_int64_t)(pa))&TLB_PA_MASK)|\
((cache)?((aliased)?TLB_CP:TLB_CACHE_MASK):TLB_E)|\
((priv)?TLB_P:0LL)|((write)?TLB_W:0LL)|((g)?TLB_G:0LL)|((ie)?TLB_IE:0LL))
#define MMU_CACHE_VIRT 0x3
#define MMU_CACHE_PHYS 0x2
#define MMU_CACHE_NONE 0x0
/* This needs to be updated for sun4u IOMMUs */
/*
* IOMMU PTE bits.
*/
#define IOPTE_PPN_MASK 0x07ffff00
#define IOPTE_PPN_SHIFT 8
#define IOPTE_RSVD 0x000000f1
#define IOPTE_WRITE 0x00000004
#define IOPTE_VALID 0x00000002
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