i386: prepare shared kernel/srat.c

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 0 insertions, 360 deletions

diff --git a/arch/i386/kernel/srat.c b/arch/i386/kernel/srat.c
deleted file mode 100644
index 2a8713ec0f9a..000000000000
--- a/arch/i386/kernel/srat.c
+++ /dev/null
@@ -1,360 +0,0 @@
-/*
- * 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/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>
-#include <asm/smp.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)))
-/* 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	3
-#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 u8 __initdata apicid_to_pxm[MAX_APICID];
-
-extern void * boot_ioremap(unsigned long, unsigned long);
-
-/* Identify CPU proximity domains */
-static void __init parse_cpu_affinity_structure(char *p)
-{
-	struct acpi_srat_cpu_affinity *cpu_affinity =
-				(struct acpi_srat_cpu_affinity *) p;
-
-	if ((cpu_affinity->flags & ACPI_SRAT_CPU_ENABLED) == 0)
-		return;		/* empty entry */
-
-	/* mark this node as "seen" in node bitmap */
-	BMAP_SET(pxm_bitmap, cpu_affinity->proximity_domain_lo);
-
-	apicid_to_pxm[cpu_affinity->apic_id] = cpu_affinity->proximity_domain_lo;
-
-	printk("CPU 0x%02X in proximity domain 0x%02X\n",
-		cpu_affinity->apic_id, cpu_affinity->proximity_domain_lo);
-}
-
-/*
- * Identify memory proximity domains and hot-remove capabilities.
- * Fill node memory chunk list structure.
- */
-static void __init parse_memory_affinity_structure (char *sratp)
-{
-	unsigned long long paddr, size;
-	unsigned long start_pfn, end_pfn;
-	u8 pxm;
-	struct node_memory_chunk_s *p, *q, *pend;
-	struct acpi_srat_mem_affinity *memory_affinity =
-			(struct acpi_srat_mem_affinity *) sratp;
-
-	if ((memory_affinity->flags & ACPI_SRAT_MEM_ENABLED) == 0)
-		return;		/* empty entry */
-
-	pxm = memory_affinity->proximity_domain & 0xff;
-
-	/* mark this node as "seen" in node bitmap */
-	BMAP_SET(pxm_bitmap, pxm);
-
-	/* calculate info for memory chunk structure */
-	paddr = memory_affinity->base_address;
-	size = memory_affinity->length;
-
-	start_pfn = paddr >> PAGE_SHIFT;
-	end_pfn = (paddr + size) >> PAGE_SHIFT;
-
-
-	if (num_memory_chunks >= MAXCHUNKS) {
-		printk("Too many mem chunks in SRAT. Ignoring %lld MBytes at %llx\n",
-			size/(1024*1024), paddr);
-		return;
-	}
-
-	/* Insertion sort based on base address */
-	pend = &node_memory_chunk[num_memory_chunks];
-	for (p = &node_memory_chunk[0]; p < pend; p++) {
-		if (start_pfn < p->start_pfn)
-			break;
-	}
-	if (p < pend) {
-		for (q = pend; q >= p; q--)
-			*(q + 1) = *q;
-	}
-	p->start_pfn = start_pfn;
-	p->end_pfn = end_pfn;
-	p->pxm = pxm;
-
-	num_memory_chunks++;
-
-	printk("Memory range 0x%lX to 0x%lX (type 0x%X) in proximity domain 0x%02X %s\n",
-		start_pfn, end_pfn,
-		memory_affinity->memory_type,
-		pxm,
-		((memory_affinity->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE) ?
-		 "enabled and removable" : "enabled" ) );
-}
-
-/*
- * The SRAT table always lists ascending addresses, so can always
- * assume that the first "start" address that you see is the real
- * start of the node, and that the current "end" address is after
- * the previous one.
- */
-static __init void node_read_chunk(int nid, struct node_memory_chunk_s *memory_chunk)
-{
-	/*
-	 * Only add present memory as told by the e820.
-	 * There is no guarantee from the SRAT that the memory it
-	 * enumerates is present at boot time because it represents
-	 * *possible* memory hotplug areas the same as normal RAM.
-	 */
-	if (memory_chunk->start_pfn >= max_pfn) {
-		printk (KERN_INFO "Ignoring SRAT pfns: 0x%08lx -> %08lx\n",
-			memory_chunk->start_pfn, memory_chunk->end_pfn);
-		return;
-	}
-	if (memory_chunk->nid != nid)
-		return;
-
-	if (!node_has_online_mem(nid))
-		node_start_pfn[nid] = memory_chunk->start_pfn;
-
-	if (node_start_pfn[nid] > memory_chunk->start_pfn)
-		node_start_pfn[nid] = memory_chunk->start_pfn;
-
-	if (node_end_pfn[nid] < memory_chunk->end_pfn)
-		node_end_pfn[nid] = memory_chunk->end_pfn;
-}
-
-/* Parse the ACPI Static Resource Affinity Table */
-static int __init acpi20_parse_srat(struct acpi_table_srat *sratp)
-{
-	u8 *start, *end, *p;
-	int i, j, nid;
-
-	start = (u8 *)(&(sratp->reserved) + 1);	/* skip header */
-	p = start;
-	end = (u8 *)sratp + sratp->header.length;
-
-	memset(pxm_bitmap, 0, sizeof(pxm_bitmap));	/* init proximity domain bitmap */
-	memset(node_memory_chunk, 0, sizeof(node_memory_chunk));
-
-	num_memory_chunks = 0;
-	while (p < end) {
-		switch (*p) {
-		case ACPI_SRAT_TYPE_CPU_AFFINITY:
-			parse_cpu_affinity_structure(p);
-			break;
-		case ACPI_SRAT_TYPE_MEMORY_AFFINITY:
-			parse_memory_affinity_structure(p);
-			break;
-		default:
-			printk("ACPI 2.0 SRAT: unknown entry skipped: type=0x%02X, len=%d\n", p[0], p[1]);
-			break;
-		}
-		p += p[1];
-		if (p[1] == 0) {
-			printk("acpi20_parse_srat: Entry length value is zero;"
-				" can't parse any further!\n");
-			break;
-		}
-	}
-
-	if (num_memory_chunks == 0) {
-		printk("could not finy any ACPI SRAT memory areas.\n");
-		goto out_fail;
-	}
-
-	/* Calculate total number of nodes in system from PXM bitmap and create
-	 * a set of sequential node IDs starting at zero.  (ACPI doesn't seem
-	 * to specify the range of _PXM values.)
-	 */
-	/*
-	 * MCD - we no longer HAVE to number nodes sequentially.  PXM domain
-	 * numbers could go as high as 256, and MAX_NUMNODES for i386 is typically
-	 * 32, so we will continue numbering them in this manner until MAX_NUMNODES
-	 * approaches MAX_PXM_DOMAINS for i386.
-	 */
-	nodes_clear(node_online_map);
-	for (i = 0; i < MAX_PXM_DOMAINS; i++) {
-		if (BMAP_TEST(pxm_bitmap, i)) {
-			int nid = acpi_map_pxm_to_node(i);
-			node_set_online(nid);
-		}
-	}
-	BUG_ON(num_online_nodes() == 0);
-
-	/* set cnode id in memory chunk structure */
-	for (i = 0; i < num_memory_chunks; i++)
-		node_memory_chunk[i].nid = pxm_to_node(node_memory_chunk[i].pxm);
-
-	printk("pxm bitmap: ");
-	for (i = 0; i < sizeof(pxm_bitmap); i++) {
-		printk("%02X ", pxm_bitmap[i]);
-	}
-	printk("\n");
-	printk("Number of logical nodes in system = %d\n", num_online_nodes());
-	printk("Number of memory chunks in system = %d\n", num_memory_chunks);
-
-	for (i = 0; i < MAX_APICID; i++)
-		apicid_2_node[i] = pxm_to_node(apicid_to_pxm[i]);
-
-	for (j = 0; j < num_memory_chunks; j++){
-		struct node_memory_chunk_s * chunk = &node_memory_chunk[j];
-		printk("chunk %d nid %d start_pfn %08lx end_pfn %08lx\n",
-		       j, chunk->nid, chunk->start_pfn, chunk->end_pfn);
-		node_read_chunk(chunk->nid, chunk);
-		add_active_range(chunk->nid, chunk->start_pfn, chunk->end_pfn);
-	}
- 
-	for_each_online_node(nid) {
-		unsigned long start = node_start_pfn[nid];
-		unsigned long end = node_end_pfn[nid];
-
-		memory_present(nid, start, end);
-		node_remap_size[nid] = node_memmap_size_bytes(nid, start, end);
-	}
-	return 1;
-out_fail:
-	return 0;
-}
-
-struct acpi_static_rsdt {
-	struct acpi_table_rsdt table;
-	u32 padding[7]; /* Allow for 7 more table entries */
-};
-
-int __init get_memcfg_from_srat(void)
-{
-	struct acpi_table_header *header = NULL;
-	struct acpi_table_rsdp *rsdp = NULL;
-	struct acpi_table_rsdt *rsdt = NULL;
-	acpi_native_uint rsdp_address = 0;
-	struct acpi_static_rsdt saved_rsdt;
-	int tables = 0;
-	int i = 0;
-
-	rsdp_address = acpi_find_rsdp();
-	if (!rsdp_address) {
-		printk("%s: System description tables not found\n",
-		       __FUNCTION__);
-		goto out_err;
-	}
-
-	printk("%s: assigning address to rsdp\n", __FUNCTION__);
-	rsdp = (struct acpi_table_rsdp *)(u32)rsdp_address;
-	if (!rsdp) {
-		printk("%s: Didn't find ACPI root!\n", __FUNCTION__);
-		goto out_err;
-	}
-
-	printk(KERN_INFO "%.8s v%d [%.6s]\n", rsdp->signature, rsdp->revision,
-		rsdp->oem_id);
-
-	if (strncmp(rsdp->signature, ACPI_SIG_RSDP,strlen(ACPI_SIG_RSDP))) {
-		printk(KERN_WARNING "%s: RSDP table signature incorrect\n", __FUNCTION__);
-		goto out_err;
-	}
-
-	rsdt = (struct acpi_table_rsdt *)
-	    boot_ioremap(rsdp->rsdt_physical_address, sizeof(struct acpi_table_rsdt));
-
-	if (!rsdt) {
-		printk(KERN_WARNING
-		       "%s: ACPI: Invalid root system description tables (RSDT)\n",
-		       __FUNCTION__);
-		goto out_err;
-	}
-
-	header = &rsdt->header;
-
-	if (strncmp(header->signature, ACPI_SIG_RSDT, strlen(ACPI_SIG_RSDT))) {
-		printk(KERN_WARNING "ACPI: RSDT signature incorrect\n");
-		goto out_err;
-	}
-
-	/* 
-	 * The number of tables is computed by taking the 
-	 * size of all entries (header size minus total 
-	 * size of RSDT) divided by the size of each entry
-	 * (4-byte table pointers).
-	 */
-	tables = (header->length - sizeof(struct acpi_table_header)) / 4;
-
-	if (!tables)
-		goto out_err;
-
-	memcpy(&saved_rsdt, rsdt, sizeof(saved_rsdt));
-
-	if (saved_rsdt.table.header.length > sizeof(saved_rsdt)) {
-		printk(KERN_WARNING "ACPI: Too big length in RSDT: %d\n",
-		       saved_rsdt.table.header.length);
-		goto out_err;
-	}
-
-	printk("Begin SRAT table scan....\n");
-
-	for (i = 0; i < tables; i++) {
-		/* Map in header, then map in full table length. */
-		header = (struct acpi_table_header *)
-			boot_ioremap(saved_rsdt.table.table_offset_entry[i], sizeof(struct acpi_table_header));
-		if (!header)
-			break;
-		header = (struct acpi_table_header *)
-			boot_ioremap(saved_rsdt.table.table_offset_entry[i], header->length);
-		if (!header)
-			break;
-
-		if (strncmp((char *) &header->signature, ACPI_SIG_SRAT, 4))
-			continue;
-
-		/* we've found the srat table. don't need to look at any more tables */
-		return acpi20_parse_srat((struct acpi_table_srat *)header);
-	}
-out_err:
-	remove_all_active_ranges();
-	printk("failed to get NUMA memory information from SRAT table\n");
-	return 0;
-}