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31 #include "arch/alpha/vtophys.hh"
32 #include "base/trace.hh"
33 #include "cpu/exec_context.hh"
34 #include "mem/functional_mem/physical_memory.hh"
38 AlphaISA::PageTableEntry
39 kernel_pte_lookup(PhysicalMemory
*pmem
, Addr ptbr
, AlphaISA::VAddr vaddr
)
41 Addr level1_pte
= ptbr
+ vaddr
.level1();
42 AlphaISA::PageTableEntry level1
= pmem
->phys_read_qword(level1_pte
);
43 if (!level1
.valid()) {
44 DPRINTF(VtoPhys
, "level 1 PTE not valid, va = %#\n", vaddr
);
48 Addr level2_pte
= level1
.paddr() + vaddr
.level2();
49 AlphaISA::PageTableEntry level2
= pmem
->phys_read_qword(level2_pte
);
50 if (!level2
.valid()) {
51 DPRINTF(VtoPhys
, "level 2 PTE not valid, va = %#x\n", vaddr
);
55 Addr level3_pte
= level2
.paddr() + vaddr
.level3();
56 AlphaISA::PageTableEntry level3
= pmem
->phys_read_qword(level3_pte
);
57 if (!level3
.valid()) {
58 DPRINTF(VtoPhys
, "level 3 PTE not valid, va = %#x\n", vaddr
);
65 vtophys(PhysicalMemory
*xc
, Addr vaddr
)
68 if (AlphaISA::IsUSeg(vaddr
))
69 DPRINTF(VtoPhys
, "vtophys: invalid vaddr %#x", vaddr
);
70 else if (AlphaISA::IsK0Seg(vaddr
))
71 paddr
= AlphaISA::K0Seg2Phys(vaddr
);
73 panic("vtophys: ptbr is not set on virtual lookup");
75 DPRINTF(VtoPhys
, "vtophys(%#x) -> %#x\n", vaddr
, paddr
);
81 vtophys(ExecContext
*xc
, Addr addr
)
83 AlphaISA::VAddr vaddr
= addr
;
84 Addr ptbr
= xc
->regs
.ipr
[AlphaISA::IPR_PALtemp20
];
86 //@todo Andrew couldn't remember why he commented some of this code
87 //so I put it back in. Perhaps something to do with gdb debugging?
88 if (AlphaISA::PcPAL(vaddr
) && (vaddr
< EV5::PalMax
)) {
89 paddr
= vaddr
& ~ULL(1);
91 if (AlphaISA::IsK0Seg(vaddr
)) {
92 paddr
= AlphaISA::K0Seg2Phys(vaddr
);
96 AlphaISA::PageTableEntry pte
=
97 kernel_pte_lookup(xc
->physmem
, ptbr
, vaddr
);
99 paddr
= pte
.paddr() | vaddr
.offset();
104 DPRINTF(VtoPhys
, "vtophys(%#x) -> %#x\n", vaddr
, paddr
);
110 ptomem(ExecContext
*xc
, Addr paddr
, size_t len
)
112 return xc
->physmem
->dma_addr(paddr
, len
);
116 vtomem(ExecContext
*xc
, Addr vaddr
, size_t len
)
118 Addr paddr
= vtophys(xc
, vaddr
);
119 return xc
->physmem
->dma_addr(paddr
, len
);
123 CopyOut(ExecContext
*xc
, void *dest
, Addr src
, size_t cplen
)
127 char *dst
= (char *)dest
;
130 paddr
= vtophys(xc
, src
);
131 len
= min((int)(AlphaISA::PageBytes
- (paddr
& AlphaISA::PageOffset
)),
133 dmaaddr
= (char *)xc
->physmem
->dma_addr(paddr
, len
);
136 memcpy(dst
, dmaaddr
, len
);
144 while (cplen
> AlphaISA::PageBytes
) {
145 paddr
= vtophys(xc
, src
);
146 dmaaddr
= (char *)xc
->physmem
->dma_addr(paddr
, AlphaISA::PageBytes
);
149 memcpy(dst
, dmaaddr
, AlphaISA::PageBytes
);
150 cplen
-= AlphaISA::PageBytes
;
151 dst
+= AlphaISA::PageBytes
;
152 src
+= AlphaISA::PageBytes
;
156 paddr
= vtophys(xc
, src
);
157 dmaaddr
= (char *)xc
->physmem
->dma_addr(paddr
, cplen
);
160 memcpy(dst
, dmaaddr
, cplen
);
165 CopyIn(ExecContext
*xc
, Addr dest
, void *source
, size_t cplen
)
169 char *src
= (char *)source
;
172 paddr
= vtophys(xc
, dest
);
173 len
= min((int)(AlphaISA::PageBytes
- (paddr
& AlphaISA::PageOffset
)),
175 dmaaddr
= (char *)xc
->physmem
->dma_addr(paddr
, len
);
178 memcpy(dmaaddr
, src
, len
);
186 while (cplen
> AlphaISA::PageBytes
) {
187 paddr
= vtophys(xc
, dest
);
188 dmaaddr
= (char *)xc
->physmem
->dma_addr(paddr
, AlphaISA::PageBytes
);
191 memcpy(dmaaddr
, src
, AlphaISA::PageBytes
);
192 cplen
-= AlphaISA::PageBytes
;
193 src
+= AlphaISA::PageBytes
;
194 dest
+= AlphaISA::PageBytes
;
198 paddr
= vtophys(xc
, dest
);
199 dmaaddr
= (char *)xc
->physmem
->dma_addr(paddr
, cplen
);
202 memcpy(dmaaddr
, src
, cplen
);
207 CopyString(ExecContext
*xc
, char *dst
, Addr vaddr
, size_t maxlen
)
213 paddr
= vtophys(xc
, vaddr
);
214 len
= min((int)(AlphaISA::PageBytes
- (paddr
& AlphaISA::PageOffset
)),
216 dmaaddr
= (char *)xc
->physmem
->dma_addr(paddr
, len
);
219 char *term
= (char *)memchr(dmaaddr
, 0, len
);
221 len
= term
- dmaaddr
+ 1;
223 memcpy(dst
, dmaaddr
, len
);
225 if (term
|| len
== maxlen
)
232 while (maxlen
> AlphaISA::PageBytes
) {
233 paddr
= vtophys(xc
, vaddr
);
234 dmaaddr
= (char *)xc
->physmem
->dma_addr(paddr
, AlphaISA::PageBytes
);
237 char *term
= (char *)memchr(dmaaddr
, 0, AlphaISA::PageBytes
);
238 len
= term
? (term
- dmaaddr
+ 1) : AlphaISA::PageBytes
;
240 memcpy(dst
, dmaaddr
, len
);
244 maxlen
-= AlphaISA::PageBytes
;
245 dst
+= AlphaISA::PageBytes
;
246 vaddr
+= AlphaISA::PageBytes
;
250 paddr
= vtophys(xc
, vaddr
);
251 dmaaddr
= (char *)xc
->physmem
->dma_addr(paddr
, maxlen
);
254 char *term
= (char *)memchr(dmaaddr
, 0, maxlen
);
255 len
= term
? (term
- dmaaddr
+ 1) : maxlen
;
257 memcpy(dst
, dmaaddr
, len
);