Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 111 insertions, 0 deletions

diff --git a/drivers/pnp/system.c b/drivers/pnp/system.c
new file mode 100644
index 000000000000..d42015c382af
--- /dev/null
+++ b/drivers/pnp/system.c
@@ -0,0 +1,111 @@
+/*
+ * system.c - a driver for reserving pnp system resources
+ *
+ * Some code is based on pnpbios_core.c
+ * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
+ *
+ */
+
+#include <linux/pnp.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/ioport.h>
+
+static const struct pnp_device_id pnp_dev_table[] = {
+        /* General ID for reserving resources */
+        {       "PNP0c02",              0       },
+        /* memory controller */
+        {       "PNP0c01",              0       },
+        {       "",                     0       }
+};
+
+static void reserve_ioport_range(char *pnpid, int start, int end)
+{
+        struct resource *res;
+        char *regionid;
+
+        regionid = kmalloc(16, GFP_KERNEL);
+        if ( regionid == NULL )
+                return;
+        snprintf(regionid, 16, "pnp %s", pnpid);
+        res = request_region(start,end-start+1,regionid);
+        if ( res == NULL )
+                kfree( regionid );
+        else
+                res->flags &= ~IORESOURCE_BUSY;
+        /*
+         * Failures at this point are usually harmless. pci quirks for
+         * example do reserve stuff they know about too, so we may well
+         * have double reservations.
+         */
+        printk(KERN_INFO
+                "pnp: %s: ioport range 0x%x-0x%x %s reserved\n",
+                pnpid, start, end,
+                NULL != res ? "has been" : "could not be"
+        );
+
+        return;
+}
+
+static void reserve_resources_of_dev( struct pnp_dev *dev )
+{
+        int i;
+
+        for (i=0;i<PNP_MAX_PORT;i++) {
+                if (!pnp_port_valid(dev, i))
+                        /* end of resources */
+                        continue;
+                if (pnp_port_start(dev, i) == 0)
+                        /* disabled */
+                        /* Do nothing */
+                        continue;
+                if (pnp_port_start(dev, i) < 0x100)
+                        /*
+                         * Below 0x100 is only standard PC hardware
+                         * (pics, kbd, timer, dma, ...)
+                         * We should not get resource conflicts there,
+                         * and the kernel reserves these anyway
+                         * (see arch/i386/kernel/setup.c).
+                         * So, do nothing
+                         */
+                        continue;
+                if (pnp_port_end(dev, i) < pnp_port_start(dev, i))
+                        /* invalid endpoint */
+                        /* Do nothing */
+                        continue;
+                reserve_ioport_range(
+                        dev->dev.bus_id,
+                        pnp_port_start(dev, i),
+                        pnp_port_end(dev, i)
+                );
+        }
+
+        return;
+}
+
+static int system_pnp_probe(struct pnp_dev * dev, const struct pnp_device_id *dev_id)
+{
+        reserve_resources_of_dev(dev);
+        return 0;
+}
+
+static struct pnp_driver system_pnp_driver = {
+        .name           = "system",
+        .id_table       = pnp_dev_table,
+        .flags          = PNP_DRIVER_RES_DO_NOT_CHANGE,
+        .probe          = system_pnp_probe,
+        .remove         = NULL,
+};
+
+static int __init pnp_system_init(void)
+{
+        return pnp_register_driver(&system_pnp_driver);
+}
+
+/**
+ * Reserve motherboard resources after PCI claim BARs,
+ * but before PCI assign resources for uninitialized PCI devices
+ */
+fs_initcall(pnp_system_init);