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410edd92 IY |
1 | /* |
2 | * QEMU i440FX/PIIX3 PCI Bridge Emulation | |
3 | * | |
4 | * Copyright (c) 2006 Fabrice Bellard | |
5 | * Copyright (c) 2011 Isaku Yamahata <yamahata at valinux co jp> | |
6 | * VA Linux Systems Japan K.K. | |
7 | * Copyright (c) 2012 Jason Baron <jbaron@redhat.com> | |
8 | * | |
9 | * Split out from piix_pci.c | |
10 | * | |
11 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
12 | * of this software and associated documentation files (the "Software"), to deal | |
13 | * in the Software without restriction, including without limitation the rights | |
14 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
15 | * copies of the Software, and to permit persons to whom the Software is | |
16 | * furnished to do so, subject to the following conditions: | |
17 | * | |
18 | * The above copyright notice and this permission notice shall be included in | |
19 | * all copies or substantial portions of the Software. | |
20 | * | |
21 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
22 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
23 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
24 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
25 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
26 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
27 | * THE SOFTWARE. | |
28 | */ | |
3cd2cf43 PB |
29 | |
30 | #include "qom/object.h" | |
9c17d615 | 31 | #include "sysemu/sysemu.h" |
0d09e41a | 32 | #include "hw/pci-host/pam.h" |
410edd92 IY |
33 | |
34 | void smram_update(MemoryRegion *smram_region, uint8_t smram, | |
35 | uint8_t smm_enabled) | |
36 | { | |
37 | bool smram_enabled; | |
38 | ||
39 | smram_enabled = ((smm_enabled && (smram & SMRAM_G_SMRAME)) || | |
40 | (smram & SMRAM_D_OPEN)); | |
41 | memory_region_set_enabled(smram_region, !smram_enabled); | |
42 | } | |
43 | ||
44 | void smram_set_smm(uint8_t *host_smm_enabled, int smm, uint8_t smram, | |
45 | MemoryRegion *smram_region) | |
46 | { | |
47 | uint8_t smm_enabled = (smm != 0); | |
48 | if (*host_smm_enabled != smm_enabled) { | |
49 | *host_smm_enabled = smm_enabled; | |
50 | smram_update(smram_region, smram, *host_smm_enabled); | |
51 | } | |
52 | } | |
53 | ||
3cd2cf43 PB |
54 | void init_pam(DeviceState *dev, MemoryRegion *ram_memory, |
55 | MemoryRegion *system_memory, MemoryRegion *pci_address_space, | |
56 | PAMMemoryRegion *mem, uint32_t start, uint32_t size) | |
410edd92 IY |
57 | { |
58 | int i; | |
59 | ||
60 | /* RAM */ | |
3cd2cf43 | 61 | memory_region_init_alias(&mem->alias[3], OBJECT(dev), "pam-ram", ram_memory, |
410edd92 IY |
62 | start, size); |
63 | /* ROM (XXX: not quite correct) */ | |
3cd2cf43 | 64 | memory_region_init_alias(&mem->alias[1], OBJECT(dev), "pam-rom", ram_memory, |
410edd92 IY |
65 | start, size); |
66 | memory_region_set_readonly(&mem->alias[1], true); | |
67 | ||
68 | /* XXX: should distinguish read/write cases */ | |
3cd2cf43 | 69 | memory_region_init_alias(&mem->alias[0], OBJECT(dev), "pam-pci", pci_address_space, |
410edd92 | 70 | start, size); |
3cd2cf43 | 71 | memory_region_init_alias(&mem->alias[2], OBJECT(dev), "pam-pci", pci_address_space, |
410edd92 IY |
72 | start, size); |
73 | ||
74 | for (i = 0; i < 4; ++i) { | |
75 | memory_region_set_enabled(&mem->alias[i], false); | |
76 | memory_region_add_subregion_overlap(system_memory, start, | |
77 | &mem->alias[i], 1); | |
78 | } | |
79 | mem->current = 0; | |
80 | } | |
81 | ||
82 | void pam_update(PAMMemoryRegion *pam, int idx, uint8_t val) | |
83 | { | |
84 | assert(0 <= idx && idx <= 12); | |
85 | ||
86 | memory_region_set_enabled(&pam->alias[pam->current], false); | |
87 | pam->current = (val >> ((!(idx & 1)) * 4)) & PAM_ATTR_MASK; | |
88 | memory_region_set_enabled(&pam->alias[pam->current], true); | |
89 | } |