Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / ipxe / src / drivers / bus / mca.c

diff --git a/qemu/roms/ipxe/src/drivers/bus/mca.c b/qemu/roms/ipxe/src/drivers/bus/mca.c
new file mode 100644 (file)
index 0000000..0405c3b
--- /dev/null
+++ b/qemu/roms/ipxe/src/drivers/bus/mca.c
@@ -0,0 +1,177 @@
+/*
+ * MCA bus driver code
+ *
+ * Abstracted from 3c509.c.
+ *
+ */
+
+FILE_LICENCE ( BSD2 );
+
+#include <stdint.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include <ipxe/io.h>
+#include <ipxe/mca.h>
+
+static void mcabus_remove ( struct root_device *rootdev );
+
+/**
+ * Probe an MCA device
+ *
+ * @v mca              MCA device
+ * @ret rc             Return status code
+ *
+ * Searches for a driver for the MCA device.  If a driver is found,
+ * its probe() routine is called.
+ */
+static int mca_probe ( struct mca_device *mca ) {
+       struct mca_driver *driver;
+       struct mca_device_id *id;
+       unsigned int i;
+       int rc;
+
+       DBG ( "Adding MCA slot %02x (ID %04x POS "
+             "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x)\n",
+             mca->slot, MCA_ID ( mca ),
+             mca->pos[0], mca->pos[1], mca->pos[2], mca->pos[3],
+             mca->pos[4], mca->pos[5], mca->pos[6], mca->pos[7] );
+
+       for_each_table_entry ( driver, MCA_DRIVERS ) {
+               for ( i = 0 ; i < driver->id_count ; i++ ) {
+                       id = &driver->ids[i];
+                       if ( id->id != MCA_ID ( mca ) )
+                               continue;
+                       mca->driver = driver;
+                       mca->dev.driver_name = id->name;
+                       DBG ( "...using driver %s\n", mca->dev.driver_name );
+                       if ( ( rc = driver->probe ( mca, id ) ) != 0 ) {
+                               DBG ( "......probe failed\n" );
+                               continue;
+                       }
+                       return 0;
+               }
+       }
+
+       DBG ( "...no driver found\n" );
+       return -ENOTTY;
+}
+
+/**
+ * Remove an MCA device
+ *
+ * @v mca              MCA device
+ */
+static void mca_remove ( struct mca_device *mca ) {
+       mca->driver->remove ( mca );
+       DBG ( "Removed MCA device %02x\n", mca->slot );
+}
+
+/**
+ * Probe MCA root bus
+ *
+ * @v rootdev          MCA bus root device
+ *
+ * Scans the MCA bus for devices and registers all devices it can
+ * find.
+ */
+static int mcabus_probe ( struct root_device *rootdev ) {
+       struct mca_device *mca = NULL;
+       unsigned int slot;
+       int seen_non_ff;
+       unsigned int i;
+       int rc;
+
+       for ( slot = 0 ; slot <= MCA_MAX_SLOT_NR ; slot++ ) {
+               /* Allocate struct mca_device */
+               if ( ! mca )
+                       mca = malloc ( sizeof ( *mca ) );
+               if ( ! mca ) {
+                       rc = -ENOMEM;
+                       goto err;
+               }
+               memset ( mca, 0, sizeof ( *mca ) );
+               mca->slot = slot;
+
+               /* Make sure motherboard setup is off */
+               outb_p ( 0xff, MCA_MOTHERBOARD_SETUP_REG );
+
+               /* Select the slot */
+               outb_p ( 0x8 | ( mca->slot & 0xf ), MCA_ADAPTER_SETUP_REG );
+
+               /* Read the POS registers */
+               seen_non_ff = 0;
+               for ( i = 0 ; i < ( sizeof ( mca->pos ) /
+                                   sizeof ( mca->pos[0] ) ) ; i++ ) {
+                       mca->pos[i] = inb_p ( MCA_POS_REG ( i ) );
+                       if ( mca->pos[i] != 0xff )
+                               seen_non_ff = 1;
+               }
+       
+               /* Kill all setup modes */
+               outb_p ( 0, MCA_ADAPTER_SETUP_REG );
+
+               /* If all POS registers are 0xff, this means there's no device
+                * present
+                */
+               if ( ! seen_non_ff )
+                       continue;
+
+               /* Add to device hierarchy */
+               snprintf ( mca->dev.name, sizeof ( mca->dev.name ),
+                          "MCA%02x", slot );
+               mca->dev.desc.bus_type = BUS_TYPE_MCA;
+               mca->dev.desc.vendor = GENERIC_MCA_VENDOR;
+               mca->dev.desc.device = MCA_ID ( mca );
+               mca->dev.parent = &rootdev->dev;
+               list_add ( &mca->dev.siblings, &rootdev->dev.children );
+               INIT_LIST_HEAD ( &mca->dev.children );
+
+               /* Look for a driver */
+               if ( mca_probe ( mca ) == 0 ) {
+                       /* mcadev registered, we can drop our ref */
+                       mca = NULL;
+               } else {
+                       /* Not registered; re-use struct */
+                       list_del ( &mca->dev.siblings );
+               }
+       }
+
+       free ( mca );
+       return 0;
+
+ err:
+       free ( mca );
+       mcabus_remove ( rootdev );
+       return rc;
+}
+
+/**
+ * Remove MCA root bus
+ *
+ * @v rootdev          MCA bus root device
+ */
+static void mcabus_remove ( struct root_device *rootdev ) {
+       struct mca_device *mca;
+       struct mca_device *tmp;
+
+       list_for_each_entry_safe ( mca, tmp, &rootdev->dev.children,
+                                  dev.siblings ) {
+               mca_remove ( mca );
+               list_del ( &mca->dev.siblings );
+               free ( mca );
+       }
+}
+
+/** MCA bus root device driver */
+static struct root_driver mca_root_driver = {
+       .probe = mcabus_probe,
+       .remove = mcabus_remove,
+};
+
+/** MCA bus root device */
+struct root_device mca_root_device __root_device = {
+       .dev = { .name = "MCA" },
+       .driver = &mca_root_driver,
+};