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-rw-r--r--hw/pci-host/pam.c87
1 files changed, 87 insertions, 0 deletions
diff --git a/hw/pci-host/pam.c b/hw/pci-host/pam.c
new file mode 100644
index 0000000000..7181bd68eb
--- /dev/null
+++ b/hw/pci-host/pam.c
@@ -0,0 +1,87 @@
+/*
+ * QEMU i440FX/PIIX3 PCI Bridge Emulation
+ *
+ * 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.
+ */
+#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(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], "pam-ram", ram_memory,
+ start, size);
+ /* ROM (XXX: not quite correct) */
+ memory_region_init_alias(&mem->alias[1], "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], "pam-pci", pci_address_space,
+ start, size);
+ memory_region_init_alias(&mem->alias[2], "pam-pci", pci_address_space,
+ 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);
+}