/* * QEMU Smram/pam logic implementation * * 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.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. */ #include "qemu/osdep.h" #include "qom/object.h" #include "sysemu/sysemu.h" #include "hw/pci-host/pam.h" void init_pam(DeviceState *dev, MemoryRegion *ram_memory, MemoryRegion *system_memory, MemoryRegion *pci_address_space, PAMMemoryRegion *mem, uint32_t start, uint32_t size) { int i; /* RAM */ memory_region_init_alias(&mem->alias[3], OBJECT(dev), "pam-ram", ram_memory, start, size); /* ROM (XXX: not quite correct) */ memory_region_init_alias(&mem->alias[1], OBJECT(dev), "pam-rom", ram_memory, start, size); memory_region_set_readonly(&mem->alias[1], true); /* XXX: should distinguish read/write cases */ memory_region_init_alias(&mem->alias[0], OBJECT(dev), "pam-pci", pci_address_space, start, size); memory_region_init_alias(&mem->alias[2], OBJECT(dev), "pam-pci", ram_memory, start, size); for (i = 0; i < 4; ++i) { memory_region_set_enabled(&mem->alias[i], false); memory_region_add_subregion_overlap(system_memory, start, &mem->alias[i], 1); } mem->current = 0; } void pam_update(PAMMemoryRegion *pam, int idx, uint8_t val) { assert(0 <= idx && idx <= 12); memory_region_set_enabled(&pam->alias[pam->current], false); pam->current = (val >> ((!(idx & 1)) * 4)) & PAM_ATTR_MASK; memory_region_set_enabled(&pam->alias[pam->current], true); }