diff options
Diffstat (limited to 'hw/pam.h')
-rw-r--r-- | hw/pam.h | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/hw/pam.h b/hw/pam.h new file mode 100644 index 0000000000..2d77ebe0d9 --- /dev/null +++ b/hw/pam.h @@ -0,0 +1,97 @@ +#ifndef QEMU_PAM_H +#define QEMU_PAM_H + +/* + * Copyright (c) 2006 Fabrice Bellard + * Copyright (c) 2011 Isaku Yamahata <yamahata at valinux co jp> + * VA Linux Systems Japan K.K. + * Copyright (c) 2012 Jason Baron <jbaron@redhat.com> + * + * Split out from piix_pci.c + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +/* + * SMRAM memory area and PAM memory area in Legacy address range for PC. + * PAM: Programmable Attribute Map registers + * + * 0xa0000 - 0xbffff compatible SMRAM + * + * 0xc0000 - 0xc3fff Expansion area memory segments + * 0xc4000 - 0xc7fff + * 0xc8000 - 0xcbfff + * 0xcc000 - 0xcffff + * 0xd0000 - 0xd3fff + * 0xd4000 - 0xd7fff + * 0xd8000 - 0xdbfff + * 0xdc000 - 0xdffff + * 0xe0000 - 0xe3fff Extended System BIOS Area Memory Segments + * 0xe4000 - 0xe7fff + * 0xe8000 - 0xebfff + * 0xec000 - 0xeffff + * + * 0xf0000 - 0xfffff System BIOS Area Memory Segments + */ + +#include "qemu-common.h" +#include "memory.h" + +#define SMRAM_C_BASE 0xa0000 +#define SMRAM_C_END 0xc0000 +#define SMRAM_C_SIZE 0x20000 + +#define PAM_EXPAN_BASE 0xc0000 +#define PAM_EXPAN_SIZE 0x04000 + +#define PAM_EXBIOS_BASE 0xe0000 +#define PAM_EXBIOS_SIZE 0x04000 + +#define PAM_BIOS_BASE 0xf0000 +#define PAM_BIOS_END 0xfffff +/* 64KB: Intel 3 series express chipset family p. 58*/ +#define PAM_BIOS_SIZE 0x10000 + +/* PAM registers: log nibble and high nibble*/ +#define PAM_ATTR_WE ((uint8_t)2) +#define PAM_ATTR_RE ((uint8_t)1) +#define PAM_ATTR_MASK ((uint8_t)3) + +/* SMRAM register */ +#define SMRAM_D_OPEN ((uint8_t)(1 << 6)) +#define SMRAM_D_CLS ((uint8_t)(1 << 5)) +#define SMRAM_D_LCK ((uint8_t)(1 << 4)) +#define SMRAM_G_SMRAME ((uint8_t)(1 << 3)) +#define SMRAM_C_BASE_SEG_MASK ((uint8_t)0x7) +#define SMRAM_C_BASE_SEG ((uint8_t)0x2) /* hardwired to b010 */ + +typedef struct PAMMemoryRegion { + MemoryRegion alias[4]; /* index = PAM value */ + unsigned current; +} PAMMemoryRegion; + +void smram_update(MemoryRegion *smram_region, uint8_t smram, + uint8_t smm_enabled); +void smram_set_smm(uint8_t *host_smm_enabled, int smm, uint8_t smram, + MemoryRegion *smram_region); +void init_pam(MemoryRegion *ram, MemoryRegion *system, MemoryRegion *pci, + PAMMemoryRegion *mem, uint32_t start, uint32_t size); +void pam_update(PAMMemoryRegion *mem, int idx, uint8_t val); + +#endif /* QEMU_PAM_H */ |