seccomp: add cacheflush to whitelist
[qemu/ar7.git] / hw / pci-host / pam.c
blob17d826cba5039b237f7b8fe3f98359c6cf40bf7e
1 /*
2 * QEMU Smram/pam logic implementation
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>
9 * Split out from piix.c
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:
18 * The above copyright notice and this permission notice shall be included in
19 * all copies or substantial portions of the Software.
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.
30 #include "qom/object.h"
31 #include "sysemu/sysemu.h"
32 #include "hw/pci-host/pam.h"
34 void init_pam(DeviceState *dev, MemoryRegion *ram_memory,
35 MemoryRegion *system_memory, MemoryRegion *pci_address_space,
36 PAMMemoryRegion *mem, uint32_t start, uint32_t size)
38 int i;
40 /* RAM */
41 memory_region_init_alias(&mem->alias[3], OBJECT(dev), "pam-ram", ram_memory,
42 start, size);
43 /* ROM (XXX: not quite correct) */
44 memory_region_init_alias(&mem->alias[1], OBJECT(dev), "pam-rom", ram_memory,
45 start, size);
46 memory_region_set_readonly(&mem->alias[1], true);
48 /* XXX: should distinguish read/write cases */
49 memory_region_init_alias(&mem->alias[0], OBJECT(dev), "pam-pci", pci_address_space,
50 start, size);
51 memory_region_init_alias(&mem->alias[2], OBJECT(dev), "pam-pci", ram_memory,
52 start, size);
54 for (i = 0; i < 4; ++i) {
55 memory_region_set_enabled(&mem->alias[i], false);
56 memory_region_add_subregion_overlap(system_memory, start,
57 &mem->alias[i], 1);
59 mem->current = 0;
62 void pam_update(PAMMemoryRegion *pam, int idx, uint8_t val)
64 assert(0 <= idx && idx <= 12);
66 memory_region_set_enabled(&pam->alias[pam->current], false);
67 pam->current = (val >> ((!(idx & 1)) * 4)) & PAM_ATTR_MASK;
68 memory_region_set_enabled(&pam->alias[pam->current], true);