1 files changed, 69 insertions, 0 deletions
diff --git a/src/hw/pci-host/pam.c b/src/hw/pci-host/pam.c
new file mode 100644
index 0000000..17d826c
--- /dev/null
+++ b/src/hw/pci-host/pam.c
@@ -0,0 +1,69 @@
+/*
+ * 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 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);
+}