LXR qemu/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 "exec/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
  84typedef struct PAMMemoryRegion {
  85    MemoryRegion alias[4];  /* index = PAM value */
  86    unsigned current;
  87} PAMMemoryRegion;
  88
  89void smram_update(MemoryRegion *smram_region, uint8_t smram,
  90                  uint8_t smm_enabled);
  91void smram_set_smm(uint8_t *host_smm_enabled, int smm, uint8_t smram,
  92                   MemoryRegion *smram_region);
  93void init_pam(MemoryRegion *ram, MemoryRegion *system, MemoryRegion *pci,
  94              PAMMemoryRegion *mem, uint32_t start, uint32_t size);
  95void pam_update(PAMMemoryRegion *mem, int idx, uint8_t val);
  96
  97#endif /* QEMU_PAM_H */
  98