1 |
dpavlin |
14 |
/* |
2 |
|
|
* Copyright (C) 2005 Anders Gavare. All rights reserved. |
3 |
|
|
* |
4 |
|
|
* Redistribution and use in source and binary forms, with or without |
5 |
|
|
* modification, are permitted provided that the following conditions are met: |
6 |
|
|
* |
7 |
|
|
* 1. Redistributions of source code must retain the above copyright |
8 |
|
|
* notice, this list of conditions and the following disclaimer. |
9 |
|
|
* 2. Redistributions in binary form must reproduce the above copyright |
10 |
|
|
* notice, this list of conditions and the following disclaimer in the |
11 |
|
|
* documentation and/or other materials provided with the distribution. |
12 |
|
|
* 3. The name of the author may not be used to endorse or promote products |
13 |
|
|
* derived from this software without specific prior written permission. |
14 |
|
|
* |
15 |
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
16 |
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
17 |
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
18 |
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
19 |
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
20 |
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
21 |
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
22 |
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
23 |
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
24 |
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
25 |
|
|
* SUCH DAMAGE. |
26 |
|
|
* |
27 |
|
|
* |
28 |
dpavlin |
18 |
* $Id: memory_ppc.c,v 1.4 2005/10/27 14:01:13 debug Exp $ |
29 |
dpavlin |
14 |
* |
30 |
|
|
* Included from cpu_ppc.c. |
31 |
|
|
*/ |
32 |
|
|
|
33 |
|
|
|
34 |
|
|
/* |
35 |
|
|
* ppc_translate_address(): |
36 |
|
|
* |
37 |
|
|
* Don't call this function is userland_emul is non-NULL, or cpu is NULL. |
38 |
|
|
* |
39 |
|
|
* Return values: |
40 |
|
|
* 0 Failure |
41 |
|
|
* 1 Success, the page is readable only |
42 |
|
|
* 2 Success, the page is read/write |
43 |
|
|
*/ |
44 |
|
|
int ppc_translate_address(struct cpu *cpu, uint64_t vaddr, |
45 |
|
|
uint64_t *return_addr, int flags) |
46 |
|
|
{ |
47 |
|
|
int instr = flags & FLAG_INSTR; |
48 |
|
|
|
49 |
|
|
if (cpu->cd.ppc.bits == 32) |
50 |
|
|
vaddr &= 0xffffffff; |
51 |
|
|
|
52 |
|
|
if ((instr && !(cpu->cd.ppc.msr & PPC_MSR_IR)) || |
53 |
|
|
(!instr && !(cpu->cd.ppc.msr & PPC_MSR_DR))) { |
54 |
|
|
*return_addr = vaddr; |
55 |
|
|
return 2; |
56 |
|
|
} |
57 |
|
|
|
58 |
|
|
/* TODO: This is not really correct. */ |
59 |
|
|
|
60 |
|
|
if (cpu->cd.ppc.sdr1 == 0) { |
61 |
|
|
/* Try the BATs: */ |
62 |
|
|
int i; |
63 |
|
|
/* TODO: This is just a quick (incorrect) hack: */ |
64 |
|
|
for (i=0; i<4; i++) { |
65 |
|
|
uint32_t p = 0, v = vaddr & 0xf0000000; |
66 |
|
|
int match = 0; |
67 |
|
|
if (instr && (cpu->cd.ppc.ibat_u[i]&0xf0000000) == v) { |
68 |
|
|
match = 1; |
69 |
|
|
p = cpu->cd.ppc.ibat_l[i] & 0xf0000000; |
70 |
|
|
} |
71 |
|
|
/* Linux/BeBox seems to use data bats for |
72 |
|
|
instructions? */ |
73 |
|
|
if (!match && (cpu->cd.ppc.dbat_u[i]&0xf0000000) == v) { |
74 |
|
|
match = 1; |
75 |
|
|
p = cpu->cd.ppc.dbat_l[i] & 0xf0000000; |
76 |
|
|
} |
77 |
|
|
if (match) { |
78 |
|
|
*return_addr = (vaddr & 0x0fffffff) | p; |
79 |
|
|
return 2; |
80 |
|
|
} |
81 |
|
|
} |
82 |
|
|
|
83 |
|
|
fatal("ppc_translate_address(): vaddr = 0x%016llx, no ", |
84 |
|
|
"BAT hit?\n", (long long)vaddr); |
85 |
|
|
*return_addr = vaddr; |
86 |
|
|
return 2; |
87 |
|
|
} |
88 |
|
|
|
89 |
|
|
/* Return failure: */ |
90 |
|
|
if (flags & FLAG_NOEXCEPTIONS) |
91 |
|
|
return 0; |
92 |
|
|
|
93 |
dpavlin |
18 |
#if 1 |
94 |
dpavlin |
14 |
/* TODO: Cause exception. */ |
95 |
|
|
fatal("TODO: exception! sdr1 = 0x%llx\n", (long long)cpu->cd.ppc.sdr1); |
96 |
|
|
*return_addr = vaddr; |
97 |
|
|
return 2; |
98 |
dpavlin |
18 |
#else |
99 |
dpavlin |
14 |
return 0; |
100 |
dpavlin |
18 |
#endif |
101 |
dpavlin |
14 |
} |
102 |
|
|
|