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Commit 3f4110a4 authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

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: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: Jacob Pan <jacob.jun.pan@intel.com>
parent 162bc7ab

arch/x86/Kconfig

+13 −0
Original line number Diff line number Diff line
@@ -318,6 +318,7 @@ config X86_EXTENDED_PLATFORM 
		SGI 320/540 (Visual Workstation)

		Summit/EXA (IBM x440)

		Unisys ES7000 IA32 series

		Moorestown MID devices



	  If you have one of these systems, or if you want to build a

	  generic distribution kernel, say Y here - otherwise say N.
@@ -377,6 +378,18 @@ config X86_ELAN 


	  If unsure, choose "PC-compatible" instead.



config X86_MRST

       bool "Moorestown MID platform"

	depends on X86_32

	depends on X86_EXTENDED_PLATFORM

	---help---

	  Moorestown is Intel's Low Power Intel Architecture (LPIA) based Moblin

	  Internet Device(MID) platform. Moorestown consists of two chips:

	  Lincroft (CPU core, graphics, and memory controller) and Langwell IOH.

	  Unlike standard x86 PCs, Moorestown does not have many legacy devices

	  nor standard legacy replacement devices/features. e.g. Moorestown does

	  not contain i8259, i8254, HPET, legacy BIOS, most of the io ports.



config X86_RDC321X

	bool "RDC R-321x SoC"

	depends on X86_32

arch/x86/include/asm/setup.h

+6 −0
Original line number Diff line number Diff line
@@ -49,6 +49,12 @@ extern void reserve_standard_io_resources(void); 
extern void i386_reserve_resources(void);

extern void setup_default_timer_irq(void);



#ifdef CONFIG_X86_MRST

extern void x86_mrst_early_setup(void);

#else

static inline void x86_mrst_early_setup(void) { }

#endif



#ifndef _SETUP



/*

arch/x86/kernel/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -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

arch/x86/kernel/head32.c

+3 −0
Original line number Diff line number Diff line
@@ -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;

arch/x86/kernel/mrst.c

0 → 100644
+24 −0
Original line number Diff line number Diff line 
/*

 * 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;

}