vtophys.cc (3529:1e2a78acb25d) | vtophys.cc (4070:74449a198a44) |
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1/* 2 * Copyright (c) 2002-2005 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; --- 11 unchanged lines hidden (view full) --- 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * | 1/* 2 * Copyright (c) 2002-2005 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; --- 11 unchanged lines hidden (view full) --- 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * |
28 * Authors: Nathan Binkert 29 * Steve Reinhardt 30 * Ali Saidi | 28 * Authors: Ali Saidi |
31 */ 32 33#include <string> 34 35#include "arch/sparc/vtophys.hh" | 29 */ 30 31#include <string> 32 33#include "arch/sparc/vtophys.hh" |
34#include "arch/sparc/tlb.hh" 35#include "base/compiler.hh" |
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36#include "base/chunk_generator.hh" 37#include "base/trace.hh" 38#include "cpu/thread_context.hh" 39#include "mem/vport.hh" 40 41using namespace std; 42 43namespace SparcISA 44{ | 36#include "base/chunk_generator.hh" 37#include "base/trace.hh" 38#include "cpu/thread_context.hh" 39#include "mem/vport.hh" 40 41using namespace std; 42 43namespace SparcISA 44{ |
45 PageTableEntry kernel_pte_lookup(FunctionalPort *mem, 46 Addr ptbr, VAddr vaddr) 47 { 48 PageTableEntry pte(4); 49 return pte; 50 } 51 | |
52 Addr vtophys(Addr vaddr) 53 { | 45 Addr vtophys(Addr vaddr) 46 { |
54 return vaddr; | 47 // In SPARC it's almost always impossible to turn a VA->PA w/o a context 48 // The only times we can kinda do it are if we have a SegKPM mapping 49 // and can find the real address in the tlb or we have a physical 50 // adddress already (beacuse we are looking at the hypervisor) 51 // Either case is rare, so we'll just panic. 52 53 panic("vtophys() without context on SPARC largly worthless\n"); 54 M5_DUMMY_RETURN |
55 } 56 57 Addr vtophys(ThreadContext *tc, Addr addr) 58 { | 55 } 56 57 Addr vtophys(ThreadContext *tc, Addr addr) 58 { |
59 return addr; 60 } | 59 // Here we have many options and are really implementing something like 60 // a fill handler to find the address since there isn't a multilevel 61 // table for us to walk around. 62 // 63 // 1. We are currently hyperpriv, return the address unmodified 64 // 2. The mmu is off return(ra->pa) 65 // 3. We are currently priv, use ctx0* tsbs to find the page 66 // 4. We are not priv, use ctxN0* tsbs to find the page 67 // For all accesses we check the tlbs first since it's possible that 68 // long standing pages (e.g. locked kernel mappings) won't be in the tsb 69 uint64_t tlbdata = tc->readMiscReg(MISCREG_TLB_DATA); |
61 | 70 |
71 bool hpriv = bits(tlbdata,0,0); 72 //bool priv = bits(tlbdata,2,2); 73 bool addr_mask = bits(tlbdata,3,3); 74 bool data_real = !bits(tlbdata,5,5); 75 bool inst_real = !bits(tlbdata,4,4); 76 bool ctx_zero = bits(tlbdata,18,16) > 0; 77 int part_id = bits(tlbdata,15,8); 78 int pri_context = bits(tlbdata,47,32); 79 //int sec_context = bits(tlbdata,63,48); |
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62 | 80 |
63 void CopyOut(ThreadContext *tc, void *dest, Addr src, size_t cplen) 64 { 65 } | 81 FunctionalPort *mem = tc->getPhysPort(); 82 ITB* itb = tc->getITBPtr(); 83 DTB* dtb = tc->getDTBPtr(); 84 TlbEntry* tbe; 85 PageTableEntry pte; 86 Addr tsbs[4]; 87 Addr va_tag; 88 TteTag ttetag; |
66 | 89 |
67 void CopyIn(ThreadContext *tc, Addr dest, void *source, size_t cplen) 68 { 69 } | 90 if (hpriv) 91 return addr; |
70 | 92 |
71 void CopyStringOut(ThreadContext *tc, char *dst, Addr vaddr, size_t maxlen) 72 { 73 } | 93 if (addr_mask) 94 addr = addr & VAddrAMask; |
74 | 95 |
75 void CopyStringIn(ThreadContext *tc, char *src, Addr vaddr) 76 { | 96 tbe = dtb->lookup(addr, part_id, data_real, ctx_zero ? 0 : pri_context , false); 97 if (tbe) goto foundtbe; 98 99 tbe = itb->lookup(addr, part_id, inst_real, ctx_zero ? 0 : pri_context, false); 100 if (tbe) goto foundtbe; 101 102 // We didn't find it in the tlbs, so lets look at the TSBs 103 dtb->GetTsbPtr(tc, addr, ctx_zero ? 0 : pri_context, tsbs); 104 va_tag = bits(addr, 63, 22); 105 for (int x = 0; x < 4; x++) { 106 ttetag = betoh(mem->read<uint64_t>(tsbs[x])); 107 if (ttetag.valid() && ttetag.va() == va_tag) { 108 pte.populate(betoh(mem->read<uint64_t>(tsbs[x]) + sizeof(uint64_t)), 109 PageTableEntry::sun4v); // I think it's sun4v at least! 110 DPRINTF(VtoPhys, "Virtual(%#x)->Physical(%#x) found in TTE\n", addr, 111 pte.paddrMask() | addr & pte.sizeMask()); 112 goto foundpte; 113 } 114 } 115 panic("couldn't translate %#x\n", addr); 116 117foundtbe: 118 pte = tbe->pte; 119 DPRINTF(VtoPhys, "Virtual(%#x)->Physical(%#x) found in TLB\n", addr, 120 pte.paddrMask() | addr & pte.sizeMask()); 121foundpte: 122 return pte.paddrMask() | addr & pte.sizeMask(); |
77 } 78} | 123 } 124} |