x86: Add Moorestown early detection

Moorestown MID devices need to be detected early in the boot process
to setup and do not call x86_default_early_setup as there is no EBDA
region to reserve.

[ Copied the minimal code from Jacobs latest MRST series ]

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Jacob Pan <jacob.jun.pan@intel.com>

3 files changed, 28 insertions, 0 deletions

diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index ccf3db607c2d..5f33316610dc 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -104,6 +104,7 @@ obj-$(CONFIG_SCx200)		+= scx200.o
 scx200-y                        += scx200_32.o
 
 obj-$(CONFIG_OLPC)              += olpc.o
+obj-$(CONFIG_X86_MRST)          += mrst.o
 
 microcode-y                             := microcode_core.o
 microcode-$(CONFIG_MICROCODE_INTEL)     += microcode_intel.o
diff --git a/arch/x86/kernel/head32.c b/arch/x86/kernel/head32.c
index 441c075e2b80..4f8e2507e8f3 100644
--- a/arch/x86/kernel/head32.c
+++ b/arch/x86/kernel/head32.c
@@ -45,6 +45,9 @@ void __init i386_start_kernel(void)
 
         /* Call the subarch specific early setup function */
         switch (boot_params.hdr.hardware_subarch) {
+        case X86_SUBARCH_MRST:
+                x86_mrst_early_setup();
+                break;
         default:
                 i386_default_early_setup();
                 break;
diff --git a/arch/x86/kernel/mrst.c b/arch/x86/kernel/mrst.c
new file mode 100644
index 000000000000..3b7078abc871
--- /dev/null
+++ b/arch/x86/kernel/mrst.c
@@ -0,0 +1,24 @@
+/*
+ * mrst.c: Intel Moorestown platform specific setup code
+ *
+ * (C) Copyright 2008 Intel Corporation
+ * Author: Jacob Pan (jacob.jun.pan@intel.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; version 2
+ * of the License.
+ */
+#include <linux/init.h>
+
+#include <asm/setup.h>
+
+/*
+ * Moorestown specific x86_init function overrides and early setup
+ * calls.
+ */
+void __init x86_mrst_early_setup(void)
+{
+        x86_init.resources.probe_roms = x86_init_noop;
+        x86_init.resources.reserve_resources = x86_init_noop;
+}