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98 lines
3.3 KiB
C
98 lines
3.3 KiB
C
#ifndef QEMU_PAM_H
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#define QEMU_PAM_H
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/*
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* Copyright (c) 2006 Fabrice Bellard
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* Copyright (c) 2011 Isaku Yamahata <yamahata at valinux co jp>
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* VA Linux Systems Japan K.K.
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* Copyright (c) 2012 Jason Baron <jbaron@redhat.com>
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*
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* Split out from piix_pci.c
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/*
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* SMRAM memory area and PAM memory area in Legacy address range for PC.
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* PAM: Programmable Attribute Map registers
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*
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* 0xa0000 - 0xbffff compatible SMRAM
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*
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* 0xc0000 - 0xc3fff Expansion area memory segments
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* 0xc4000 - 0xc7fff
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* 0xc8000 - 0xcbfff
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* 0xcc000 - 0xcffff
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* 0xd0000 - 0xd3fff
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* 0xd4000 - 0xd7fff
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* 0xd8000 - 0xdbfff
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* 0xdc000 - 0xdffff
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* 0xe0000 - 0xe3fff Extended System BIOS Area Memory Segments
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* 0xe4000 - 0xe7fff
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* 0xe8000 - 0xebfff
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* 0xec000 - 0xeffff
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*
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* 0xf0000 - 0xfffff System BIOS Area Memory Segments
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*/
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#include "qemu-common.h"
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#include "exec/memory.h"
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#define SMRAM_C_BASE 0xa0000
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#define SMRAM_C_END 0xc0000
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#define SMRAM_C_SIZE 0x20000
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#define PAM_EXPAN_BASE 0xc0000
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#define PAM_EXPAN_SIZE 0x04000
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#define PAM_EXBIOS_BASE 0xe0000
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#define PAM_EXBIOS_SIZE 0x04000
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#define PAM_BIOS_BASE 0xf0000
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#define PAM_BIOS_END 0xfffff
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/* 64KB: Intel 3 series express chipset family p. 58*/
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#define PAM_BIOS_SIZE 0x10000
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/* PAM registers: log nibble and high nibble*/
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#define PAM_ATTR_WE ((uint8_t)2)
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#define PAM_ATTR_RE ((uint8_t)1)
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#define PAM_ATTR_MASK ((uint8_t)3)
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/* SMRAM register */
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#define SMRAM_D_OPEN ((uint8_t)(1 << 6))
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#define SMRAM_D_CLS ((uint8_t)(1 << 5))
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#define SMRAM_D_LCK ((uint8_t)(1 << 4))
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#define SMRAM_G_SMRAME ((uint8_t)(1 << 3))
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#define SMRAM_C_BASE_SEG_MASK ((uint8_t)0x7)
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#define SMRAM_C_BASE_SEG ((uint8_t)0x2) /* hardwired to b010 */
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typedef struct PAMMemoryRegion {
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MemoryRegion alias[4]; /* index = PAM value */
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unsigned current;
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} PAMMemoryRegion;
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void smram_update(MemoryRegion *smram_region, uint8_t smram,
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uint8_t smm_enabled);
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void smram_set_smm(uint8_t *host_smm_enabled, int smm, uint8_t smram,
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MemoryRegion *smram_region);
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void init_pam(MemoryRegion *ram, MemoryRegion *system, MemoryRegion *pci,
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PAMMemoryRegion *mem, uint32_t start, uint32_t size);
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void pam_update(PAMMemoryRegion *mem, int idx, uint8_t val);
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#endif /* QEMU_PAM_H */
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