Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6

[linux-2.6] / arch / powerpc / kernel / setup-common.c

diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 3c8847b647fad37d3229da9f792a84d3384d4087..ed07a198f8d665a9b9b90461cb48d464f57abd16 100644 (file)
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -478,11 +478,39 @@ void probe_machine(void)
        printk(KERN_INFO "Using %s machine description\n", ppc_md.name);
 }
 
+/* Match a class of boards, not a specific device configuration. */
 int check_legacy_ioport(unsigned long base_port)
 {
-       if (ppc_md.check_legacy_ioport == NULL)
-               return 0;
-       return ppc_md.check_legacy_ioport(base_port);
+       struct device_node *parent, *np = NULL;
+       int ret = -ENODEV;
+
+       switch(base_port) {
+       case I8042_DATA_REG:
+               np = of_find_node_by_type(NULL, "8042");
+               break;
+       case FDC_BASE: /* FDC1 */
+               np = of_find_node_by_type(NULL, "fdc");
+               break;
+#ifdef CONFIG_PPC_PREP
+       case _PIDXR:
+       case _PNPWRP:
+       case PNPBIOS_BASE:
+               /* implement me */
+#endif
+       default:
+               /* ipmi is supposed to fail here */
+               break;
+       }
+       if (!np)
+               return ret;
+       parent = of_get_parent(np);
+       if (parent) {
+               if (strcmp(parent->type, "isa") == 0)
+                       ret = 0;
+               of_node_put(parent);
+       }
+       of_node_put(np);
+       return ret;
 }
 EXPORT_SYMBOL(check_legacy_ioport);
 
@@ -502,3 +530,44 @@ void __init setup_panic(void)
 {
        atomic_notifier_chain_register(&panic_notifier_list, &ppc_panic_block);
 }
+
+#ifdef CONFIG_CHECK_CACHE_COHERENCY
+/*
+ * For platforms that have configurable cache-coherency.  This function
+ * checks that the cache coherency setting of the kernel matches the setting
+ * left by the firmware, as indicated in the device tree.  Since a mismatch
+ * will eventually result in DMA failures, we print * and error and call
+ * BUG() in that case.
+ */
+
+#ifdef CONFIG_NOT_COHERENT_CACHE
+#define KERNEL_COHERENCY       0
+#else
+#define KERNEL_COHERENCY       1
+#endif
+
+static int __init check_cache_coherency(void)
+{
+       struct device_node *np;
+       const void *prop;
+       int devtree_coherency;
+
+       np = of_find_node_by_path("/");
+       prop = of_get_property(np, "coherency-off", NULL);
+       of_node_put(np);
+
+       devtree_coherency = prop ? 0 : 1;
+
+       if (devtree_coherency != KERNEL_COHERENCY) {
+               printk(KERN_ERR
+                       "kernel coherency:%s != device tree_coherency:%s\n",
+                       KERNEL_COHERENCY ? "on" : "off",
+                       devtree_coherency ? "on" : "off");
+               BUG();
+       }
+
+       return 0;
+}
+
+late_initcall(check_cache_coherency);
+#endif /* CONFIG_CHECK_CACHE_COHERENCY */