Merge remote-tracking branch 'remotes/cschoenebeck/tags/pull-9p-20211027' into staging
[qemu.git] / include / hw / pci-host / pam.h
1 #ifndef QEMU_PAM_H
2 #define QEMU_PAM_H
3
4 /*
5 * Copyright (c) 2006 Fabrice Bellard
6 * Copyright (c) 2011 Isaku Yamahata <yamahata at valinux co jp>
7 * VA Linux Systems Japan K.K.
8 * Copyright (c) 2012 Jason Baron <jbaron@redhat.com>
9 *
10 * Split out from piix.c
11 *
12 * Permission is hereby granted, free of charge, to any person obtaining a copy
13 * of this software and associated documentation files (the "Software"), to deal
14 * in the Software without restriction, including without limitation the rights
15 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
16 * copies of the Software, and to permit persons to whom the Software is
17 * furnished to do so, subject to the following conditions:
18 *
19 * The above copyright notice and this permission notice shall be included in
20 * all copies or substantial portions of the Software.
21 *
22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
23 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
24 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
25 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
26 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
27 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
28 * THE SOFTWARE.
29 */
30
31 /*
32 * SMRAM memory area and PAM memory area in Legacy address range for PC.
33 * PAM: Programmable Attribute Map registers
34 *
35 * 0xa0000 - 0xbffff compatible SMRAM
36 *
37 * 0xc0000 - 0xc3fff Expansion area memory segments
38 * 0xc4000 - 0xc7fff
39 * 0xc8000 - 0xcbfff
40 * 0xcc000 - 0xcffff
41 * 0xd0000 - 0xd3fff
42 * 0xd4000 - 0xd7fff
43 * 0xd8000 - 0xdbfff
44 * 0xdc000 - 0xdffff
45 * 0xe0000 - 0xe3fff Extended System BIOS Area Memory Segments
46 * 0xe4000 - 0xe7fff
47 * 0xe8000 - 0xebfff
48 * 0xec000 - 0xeffff
49 *
50 * 0xf0000 - 0xfffff System BIOS Area Memory Segments
51 */
52
53 #include "exec/memory.h"
54
55 #define SMRAM_C_BASE 0xa0000
56 #define SMRAM_C_END 0xc0000
57 #define SMRAM_C_SIZE 0x20000
58
59 #define PAM_EXPAN_BASE 0xc0000
60 #define PAM_EXPAN_SIZE 0x04000
61
62 #define PAM_EXBIOS_BASE 0xe0000
63 #define PAM_EXBIOS_SIZE 0x04000
64
65 #define PAM_BIOS_BASE 0xf0000
66 #define PAM_BIOS_END 0xfffff
67 /* 64KB: Intel 3 series express chipset family p. 58*/
68 #define PAM_BIOS_SIZE 0x10000
69
70 /* PAM registers: log nibble and high nibble*/
71 #define PAM_ATTR_WE ((uint8_t)2)
72 #define PAM_ATTR_RE ((uint8_t)1)
73 #define PAM_ATTR_MASK ((uint8_t)3)
74
75 /* SMRAM register */
76 #define SMRAM_D_OPEN ((uint8_t)(1 << 6))
77 #define SMRAM_D_CLS ((uint8_t)(1 << 5))
78 #define SMRAM_D_LCK ((uint8_t)(1 << 4))
79 #define SMRAM_G_SMRAME ((uint8_t)(1 << 3))
80 #define SMRAM_C_BASE_SEG_MASK ((uint8_t)0x7)
81 #define SMRAM_C_BASE_SEG ((uint8_t)0x2) /* hardwired to b010 */
82
83 #define PAM_REGIONS_COUNT 13
84
85 typedef struct PAMMemoryRegion {
86 MemoryRegion alias[4]; /* index = PAM value */
87 unsigned current;
88 } PAMMemoryRegion;
89
90 void init_pam(DeviceState *dev, MemoryRegion *ram, MemoryRegion *system,
91 MemoryRegion *pci, PAMMemoryRegion *mem, uint32_t start, uint32_t size);
92 void pam_update(PAMMemoryRegion *mem, int idx, uint8_t val);
93
94 #endif /* QEMU_PAM_H */