hw/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_pci.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 "qemu-common.h"
  54 #include "memory.h"
  55
  56 #define SMRAM_C_BASE    0xa0000
  57 #define SMRAM_C_END     0xc0000
  58 #define SMRAM_C_SIZE    0x20000
  59
  60 #define PAM_EXPAN_BASE  0xc0000
  61 #define PAM_EXPAN_SIZE  0x04000
  62
  63 #define PAM_EXBIOS_BASE 0xe0000
  64 #define PAM_EXBIOS_SIZE 0x04000
  65
  66 #define PAM_BIOS_BASE   0xf0000
  67 #define PAM_BIOS_END    0xfffff
  68 /* 64KB: Intel 3 series express chipset family p. 58*/
  69 #define PAM_BIOS_SIZE   0x10000
  70
  71 /* PAM registers: log nibble and high nibble*/
  72 #define PAM_ATTR_WE     ((uint8_t)2)
  73 #define PAM_ATTR_RE     ((uint8_t)1)
  74 #define PAM_ATTR_MASK   ((uint8_t)3)
  75
  76 /* SMRAM register */
  77 #define SMRAM_D_OPEN           ((uint8_t)(1 << 6))
  78 #define SMRAM_D_CLS            ((uint8_t)(1 << 5))
  79 #define SMRAM_D_LCK            ((uint8_t)(1 << 4))
  80 #define SMRAM_G_SMRAME         ((uint8_t)(1 << 3))
  81 #define SMRAM_C_BASE_SEG_MASK  ((uint8_t)0x7)
  82 #define SMRAM_C_BASE_SEG       ((uint8_t)0x2)  /* hardwired to b010 */
  83
  84 typedef struct PAMMemoryRegion {
  85     MemoryRegion alias[4];  /* index = PAM value */
  86     unsigned current;
  87 } PAMMemoryRegion;
  88
  89 void smram_update(MemoryRegion *smram_region, uint8_t smram,
  90                   uint8_t smm_enabled);
  91 void smram_set_smm(uint8_t *host_smm_enabled, int smm, uint8_t smram,
  92                    MemoryRegion *smram_region);
  93 void init_pam(MemoryRegion *ram, MemoryRegion *system, MemoryRegion *pci,
  94               PAMMemoryRegion *mem, uint32_t start, uint32_t size);
  95 void pam_update(PAMMemoryRegion *mem, int idx, uint8_t val);
  96
  97 #endif /* QEMU_PAM_H */