descriptor for chips

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@831 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

src/include/device/chip.h

@@ -0,0 +1,50 @@
+/* chips are arbitrary chips (superio, southbridge, etc.)
+ * They have private structures that define chip resources and default 
+ * settings. They have four externally visible functions for control. 
+ * new settings are provided as ascii strings. 
+ */
+
+/* some of the types of resources chips can control */
+
+struct com_ports {
+  unsigned int enable,baud, base, irq;
+};
+
+/* lpt port description. 
+ * Note that for many chips you only really need to define the 
+ * enable. 
+ */
+struct lpt_ports {
+	unsigned int enable, // 1 if this port is enabled
+		     mode,   // pp mode
+		     base,   // IO base of the parallel port 
+                     irq;    // irq
+};
+
+
+
+/* linkages from devices of a type (e.g. superio devices) 
+ * to the actual physical PCI device. This type is used in an array of 
+ * structs built by NLBConfig.py. We owe this idea to Plan 9.
+ */
+
+struct chip;
+
+struct chip_control {
+  void (*alloc)(struct chip *s);
+  void (*pre_pci_init)(struct chip *s);
+  void (*init)(struct chip *s);
+  void (*finishup)(struct chip *s);
+  char *path;     /* the default path. Can be overridden
+		   * by commands in config
+		   */
+  // This is the print name for debugging
+  char *name;
+};
+
+struct chip {
+  struct chip_control *control; /* for this device */
+  char *path; /* can be 0, in which case the default is taken */
+  char *configuration; /* can be 0. */
+};
+