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31 #include "targetarch/pmap.h"
33 #include "cpu/exec_context.hh"
34 #include "mem/functional_mem/physical_memory.hh"
35 #include "base/trace.hh"
36 #include "targetarch/vtophys.hh"
41 level3_index(Addr vaddr
)
42 { return (vaddr
>> ALPHA_PGSHIFT
) & PTEMASK
; }
45 level2_index(Addr vaddr
)
46 { return (vaddr
>> (ALPHA_PGSHIFT
+ NPTEPG_SHIFT
)) & PTEMASK
; }
49 level1_index(Addr vaddr
)
50 { return (vaddr
>> (ALPHA_PGSHIFT
+ 2 * NPTEPG_SHIFT
)) & PTEMASK
; }
53 kernel_pte_lookup(PhysicalMemory
*pmem
, Addr ptbr
, Addr vaddr
)
55 uint64_t level1_map
= ptbr
;
56 Addr level1_pte
= level1_map
+ (level1_index(vaddr
) << PTESHIFT
);
58 uint64_t level1
= pmem
->phys_read_qword(level1_pte
);
59 if (!entry_valid(level1
)) {
60 DPRINTF(VtoPhys
, "level 1 PTE not valid, va = %#\n", vaddr
);
64 uint64_t level2_map
= PMAP_PTE_PA(level1
);
65 Addr level2_pte
= level2_map
+ (level2_index(vaddr
) << PTESHIFT
);
66 uint64_t level2
= pmem
->phys_read_qword(level2_pte
);
67 if (!entry_valid(level2
)) {
68 DPRINTF(VtoPhys
, "level 2 PTE not valid, va = %#x\n", vaddr
);
72 uint64_t level3_map
= PMAP_PTE_PA(level2
);
73 Addr level3_pte
= level3_map
+ (level3_index(vaddr
) << PTESHIFT
);
79 vtophys(PhysicalMemory
*xc
, Addr vaddr
)
82 if (vaddr
< ALPHA_K0SEG_BASE
)
83 DPRINTF(VtoPhys
, "vtophys: invalid vaddr %#x", vaddr
);
84 else if (vaddr
< ALPHA_K1SEG_BASE
)
85 paddr
= ALPHA_K0SEG_TO_PHYS(vaddr
);
87 panic("vtophys: ptbr is not set on virtual lookup");
89 DPRINTF(VtoPhys
, "vtophys(%#x) -> %#x\n", vaddr
, paddr
);
95 vtophys(ExecContext
*xc
, Addr vaddr
)
97 Addr ptbr
= xc
->regs
.ipr
[AlphaISA::IPR_PALtemp20
];
99 //@todo Andrew couldn't remember why he commented some of this code
100 //so I put it back in. Perhaps something to do with gdb debugging?
102 paddr
= vaddr
& ~ULL(1);
104 if (vaddr
>= ALPHA_K0SEG_BASE
&& vaddr
<= ALPHA_K0SEG_END
) {
105 paddr
= ALPHA_K0SEG_TO_PHYS(vaddr
);
109 Addr pte
= kernel_pte_lookup(xc
->physmem
, ptbr
, vaddr
);
110 uint64_t entry
= xc
->physmem
->phys_read_qword(pte
);
111 if (pte
&& entry_valid(entry
))
112 paddr
= PMAP_PTE_PA(entry
) | (vaddr
& PGOFSET
);
117 DPRINTF(VtoPhys
, "vtophys(%#x) -> %#x\n", vaddr
, paddr
);
123 ptomem(ExecContext
*xc
, Addr paddr
, size_t len
)
125 return xc
->physmem
->dma_addr(paddr
, len
);
129 vtomem(ExecContext
*xc
, Addr vaddr
, size_t len
)
131 Addr paddr
= vtophys(xc
, vaddr
);
132 return xc
->physmem
->dma_addr(paddr
, len
);
136 CopyOut(ExecContext
*xc
, void *dest
, Addr src
, size_t cplen
)
140 char *dst
= (char *)dest
;
143 paddr
= vtophys(xc
, src
);
144 len
= min((int)(ALPHA_PGBYTES
- (paddr
& PGOFSET
)), (int)cplen
);
145 dmaaddr
= (char *)xc
->physmem
->dma_addr(paddr
, len
);
148 memcpy(dst
, dmaaddr
, len
);
156 while (cplen
> ALPHA_PGBYTES
) {
157 paddr
= vtophys(xc
, src
);
158 dmaaddr
= (char *)xc
->physmem
->dma_addr(paddr
, ALPHA_PGBYTES
);
161 memcpy(dst
, dmaaddr
, ALPHA_PGBYTES
);
162 cplen
-= ALPHA_PGBYTES
;
163 dst
+= ALPHA_PGBYTES
;
164 src
+= ALPHA_PGBYTES
;
168 paddr
= vtophys(xc
, src
);
169 dmaaddr
= (char *)xc
->physmem
->dma_addr(paddr
, cplen
);
172 memcpy(dst
, dmaaddr
, cplen
);
177 CopyIn(ExecContext
*xc
, Addr dest
, void *source
, size_t cplen
)
181 char *src
= (char *)source
;
184 paddr
= vtophys(xc
, dest
);
185 len
= min((int)(ALPHA_PGBYTES
- (paddr
& PGOFSET
)), (int)cplen
);
186 dmaaddr
= (char *)xc
->physmem
->dma_addr(paddr
, len
);
189 memcpy(dmaaddr
, src
, len
);
197 while (cplen
> ALPHA_PGBYTES
) {
198 paddr
= vtophys(xc
, dest
);
199 dmaaddr
= (char *)xc
->physmem
->dma_addr(paddr
, ALPHA_PGBYTES
);
202 memcpy(dmaaddr
, src
, ALPHA_PGBYTES
);
203 cplen
-= ALPHA_PGBYTES
;
204 src
+= ALPHA_PGBYTES
;
205 dest
+= ALPHA_PGBYTES
;
209 paddr
= vtophys(xc
, dest
);
210 dmaaddr
= (char *)xc
->physmem
->dma_addr(paddr
, cplen
);
213 memcpy(dmaaddr
, src
, cplen
);
218 CopyString(ExecContext
*xc
, char *dst
, Addr vaddr
, size_t maxlen
)
224 paddr
= vtophys(xc
, vaddr
);
225 len
= min((int)(ALPHA_PGBYTES
- (paddr
& PGOFSET
)), (int)maxlen
);
226 dmaaddr
= (char *)xc
->physmem
->dma_addr(paddr
, len
);
229 char *term
= (char *)memchr(dmaaddr
, 0, len
);
231 len
= term
- dmaaddr
+ 1;
233 memcpy(dst
, dmaaddr
, len
);
235 if (term
|| len
== maxlen
)
242 while (maxlen
> ALPHA_PGBYTES
) {
243 paddr
= vtophys(xc
, vaddr
);
244 dmaaddr
= (char *)xc
->physmem
->dma_addr(paddr
, ALPHA_PGBYTES
);
247 char *term
= (char *)memchr(dmaaddr
, 0, ALPHA_PGBYTES
);
248 len
= term
? (term
- dmaaddr
+ 1) : ALPHA_PGBYTES
;
250 memcpy(dst
, dmaaddr
, len
);
254 maxlen
-= ALPHA_PGBYTES
;
255 dst
+= ALPHA_PGBYTES
;
256 vaddr
+= ALPHA_PGBYTES
;
260 paddr
= vtophys(xc
, vaddr
);
261 dmaaddr
= (char *)xc
->physmem
->dma_addr(paddr
, maxlen
);
264 char *term
= (char *)memchr(dmaaddr
, 0, maxlen
);
265 len
= term
? (term
- dmaaddr
+ 1) : maxlen
;
267 memcpy(dst
, dmaaddr
, len
);