litmus-rt.git - The LITMUS^RT kernel.

The LITMUS^RT kernel.

Bjoern Brandenburg

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author	H. Peter Anvin <hpa@linux.intel.com>	2012-12-12 23:28:39 -0500
committer	H. Peter Anvin <hpa@linux.intel.com>	2012-12-12 23:28:39 -0500
commit	cd34ab8b16ffaa9753d85adb4fb6cd98e7e1d22a (patch)
tree	ca7aa7b3967a6e05c00087db558a8606d5619049 /include/uapi/linux/kdev_t.h
parent	4bfe24ac1d9d9f06b30b2909f53ea462c72cfe1d (diff)

x86, doc: Document that bootloader ID 4 is used also by iPXE

Etherboot -> gPXE -> iPXE... Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Cc: Michael Brown <mbrown@fensystems.co.uk>

Diffstat (limited to 'include/uapi/linux/kdev_t.h')

0 files changed, 0 insertions, 0 deletions

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/*
 * Some of the code in this file has been gleaned from the 64 bit 
 * discontigmem support code base.
 *
 * Copyright (C) 2002, IBM Corp.
 *
 * All rights reserved.          
 *
 * 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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
 * NON INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * Send feedback to Pat Gaughen <gone@us.ibm.com>
 */
#include <linux/config.h>
#include <linux/mm.h>
#include <linux/bootmem.h>
#include <linux/mmzone.h>
#include <linux/acpi.h>
#include <linux/nodemask.h>
#include <asm/srat.h>
#include <asm/topology.h>

/*
 * proximity macros and definitions
 */
#define NODE_ARRAY_INDEX(x)	((x) / 8)	/* 8 bits/char */
#define NODE_ARRAY_OFFSET(x)	((x) % 8)	/* 8 bits/char */
#define BMAP_SET(bmap, bit)	((bmap)[NODE_ARRAY_INDEX(bit)] |= 1 << NODE_ARRAY_OFFSET(bit))
#define BMAP_TEST(bmap, bit)	((bmap)[NODE_ARRAY_INDEX(bit)] & (1 << NODE_ARRAY_OFFSET(bit)))
#define MAX_PXM_DOMAINS		256	/* 1 byte and no promises about values */
/* bitmap length; _PXM is at most 255 */
#define PXM_BITMAP_LEN (MAX_PXM_DOMAINS / 8) 
static u8 pxm_bitmap[PXM_BITMAP_LEN];	/* bitmap of proximity domains */

#define MAX_CHUNKS_PER_NODE	4
#define MAXCHUNKS		(MAX_CHUNKS_PER_NODE * MAX_NUMNODES)
struct node_memory_chunk_s {
	unsigned long	start_pfn;
	unsigned long	end_pfn;
	u8	pxm;		// proximity domain of node
	u8	nid;		// which cnode contains this chunk?
	u8	bank;		// which mem bank on this node
};
static struct node_memory_chunk_s node_memory_chunk[MAXCHUNKS];

static int num_memory_chunks;		/* total number of memory chunks */
static int zholes_size_init;
static unsigned long zholes_size[MAX_NUMNODES * MAX_NR_ZONES];

extern void * boot_ioremap(unsigned long, unsigned long);

/* Identify CPU proximity domains */
static void __init parse_cpu_affinity_structure(char *p)
{
	struct acpi_table_processor_affinity *cpu_affinity = 
				(struct acpi_table_processor_affinity *) p;

	if (!cpu_affinity->flags.enabled)
		return;		/* empty entry */

	/* mark this node as "seen" in node bitmap */
	BMAP_SET(pxm_bitmap, cpu_affinity->proximity_domain);

	printk("CPU 0x%02X in proximity domain 0x%02X\n",
		cpu_affinity->apic_id, cpu_affinity->proximity_domain);
}

/*


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