xref: /openbmc/qemu/include/hw/pci-host/pam.h (revision 2b74dd91)
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(PAMMemoryRegion *mem, Object *owner, MemoryRegion *ram,
91               MemoryRegion *system, MemoryRegion *pci,
92               uint32_t start, uint32_t size);
93 void pam_update(PAMMemoryRegion *mem, int idx, uint8_t val);
94 
95 #endif /* QEMU_PAM_H */
96