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/*
* 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 "qom/object.h"
#include "sysemu/sysemu.h"
#include "hw/pci-host/pam.h"
void smram_update(MemoryRegion *smram_region, uint8_t smram,
uint8_t smm_enabled)
{
bool smram_enabled;
smram_enabled = ((smm_enabled && (smram & SMRAM_G_SMRAME)) ||
(smram & SMRAM_D_OPEN));
memory_region_set_enabled(smram_region, !smram_enabled);
}
void smram_set_smm(uint8_t *host_smm_enabled, int smm, uint8_t smram,
MemoryRegion *smram_region)
{
uint8_t smm_enabled = (smm != 0);
if (*host_smm_enabled != smm_enabled) {
*host_smm_enabled = smm_enabled;
smram_update(smram_region, smram, *host_smm_enabled);
}
}
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);
}
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