481 lines
11 KiB
C
481 lines
11 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2000, 05 by Ralf Baechle (ralf@linux-mips.org)
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* Copyright (C) 2000 by Silicon Graphics, Inc.
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* Copyright (C) 2004 by Christoph Hellwig
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*
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* On SGI IP27 the ARC memory configuration data is completely bogus but
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* alternate easier to use mechanisms are available.
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/memblock.h>
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#include <linux/mm.h>
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#include <linux/mmzone.h>
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#include <linux/export.h>
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#include <linux/nodemask.h>
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#include <linux/swap.h>
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#include <linux/pfn.h>
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#include <linux/highmem.h>
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#include <asm/page.h>
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#include <asm/pgalloc.h>
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#include <asm/sections.h>
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#include <asm/sn/arch.h>
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#include <asm/sn/hub.h>
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#include <asm/sn/klconfig.h>
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#include <asm/sn/sn_private.h>
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#define SLOT_PFNSHIFT (SLOT_SHIFT - PAGE_SHIFT)
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#define PFN_NASIDSHFT (NASID_SHFT - PAGE_SHIFT)
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struct node_data *__node_data[MAX_COMPACT_NODES];
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EXPORT_SYMBOL(__node_data);
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static int fine_mode;
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static int is_fine_dirmode(void)
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{
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return ((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_REGIONSIZE_MASK) >> NSRI_REGIONSIZE_SHFT) & REGIONSIZE_FINE;
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}
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static hubreg_t get_region(cnodeid_t cnode)
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{
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if (fine_mode)
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return COMPACT_TO_NASID_NODEID(cnode) >> NASID_TO_FINEREG_SHFT;
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else
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return COMPACT_TO_NASID_NODEID(cnode) >> NASID_TO_COARSEREG_SHFT;
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}
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static hubreg_t region_mask;
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static void gen_region_mask(hubreg_t *region_mask)
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{
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cnodeid_t cnode;
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(*region_mask) = 0;
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for_each_online_node(cnode) {
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(*region_mask) |= 1ULL << get_region(cnode);
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}
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}
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#define rou_rflag rou_flags
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static int router_distance;
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static void router_recurse(klrou_t *router_a, klrou_t *router_b, int depth)
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{
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klrou_t *router;
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lboard_t *brd;
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int port;
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if (router_a->rou_rflag == 1)
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return;
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if (depth >= router_distance)
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return;
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router_a->rou_rflag = 1;
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for (port = 1; port <= MAX_ROUTER_PORTS; port++) {
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if (router_a->rou_port[port].port_nasid == INVALID_NASID)
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continue;
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brd = (lboard_t *)NODE_OFFSET_TO_K0(
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router_a->rou_port[port].port_nasid,
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router_a->rou_port[port].port_offset);
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if (brd->brd_type == KLTYPE_ROUTER) {
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router = (klrou_t *)NODE_OFFSET_TO_K0(NASID_GET(brd), brd->brd_compts[0]);
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if (router == router_b) {
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if (depth < router_distance)
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router_distance = depth;
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}
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else
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router_recurse(router, router_b, depth + 1);
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}
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}
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router_a->rou_rflag = 0;
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}
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unsigned char __node_distances[MAX_COMPACT_NODES][MAX_COMPACT_NODES];
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EXPORT_SYMBOL(__node_distances);
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static int __init compute_node_distance(nasid_t nasid_a, nasid_t nasid_b)
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{
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klrou_t *router, *router_a = NULL, *router_b = NULL;
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lboard_t *brd, *dest_brd;
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cnodeid_t cnode;
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nasid_t nasid;
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int port;
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/* Figure out which routers nodes in question are connected to */
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for_each_online_node(cnode) {
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nasid = COMPACT_TO_NASID_NODEID(cnode);
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if (nasid == -1) continue;
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brd = find_lboard_class((lboard_t *)KL_CONFIG_INFO(nasid),
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KLTYPE_ROUTER);
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if (!brd)
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continue;
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do {
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if (brd->brd_flags & DUPLICATE_BOARD)
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continue;
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router = (klrou_t *)NODE_OFFSET_TO_K0(NASID_GET(brd), brd->brd_compts[0]);
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router->rou_rflag = 0;
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for (port = 1; port <= MAX_ROUTER_PORTS; port++) {
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if (router->rou_port[port].port_nasid == INVALID_NASID)
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continue;
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dest_brd = (lboard_t *)NODE_OFFSET_TO_K0(
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router->rou_port[port].port_nasid,
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router->rou_port[port].port_offset);
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if (dest_brd->brd_type == KLTYPE_IP27) {
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if (dest_brd->brd_nasid == nasid_a)
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router_a = router;
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if (dest_brd->brd_nasid == nasid_b)
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router_b = router;
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}
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}
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} while ((brd = find_lboard_class(KLCF_NEXT(brd), KLTYPE_ROUTER)));
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}
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if (router_a == NULL) {
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printk("node_distance: router_a NULL\n");
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return -1;
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}
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if (router_b == NULL) {
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printk("node_distance: router_b NULL\n");
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return -1;
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}
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if (nasid_a == nasid_b)
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return 0;
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if (router_a == router_b)
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return 1;
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router_distance = 100;
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router_recurse(router_a, router_b, 2);
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return router_distance;
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}
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static void __init init_topology_matrix(void)
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{
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nasid_t nasid, nasid2;
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cnodeid_t row, col;
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for (row = 0; row < MAX_COMPACT_NODES; row++)
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for (col = 0; col < MAX_COMPACT_NODES; col++)
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__node_distances[row][col] = -1;
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for_each_online_node(row) {
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nasid = COMPACT_TO_NASID_NODEID(row);
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for_each_online_node(col) {
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nasid2 = COMPACT_TO_NASID_NODEID(col);
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__node_distances[row][col] =
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compute_node_distance(nasid, nasid2);
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}
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}
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}
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static void __init dump_topology(void)
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{
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nasid_t nasid;
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cnodeid_t cnode;
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lboard_t *brd, *dest_brd;
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int port;
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int router_num = 0;
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klrou_t *router;
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cnodeid_t row, col;
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printk("************** Topology ********************\n");
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printk(" ");
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for_each_online_node(col)
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printk("%02d ", col);
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printk("\n");
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for_each_online_node(row) {
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printk("%02d ", row);
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for_each_online_node(col)
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printk("%2d ", node_distance(row, col));
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printk("\n");
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}
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for_each_online_node(cnode) {
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nasid = COMPACT_TO_NASID_NODEID(cnode);
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if (nasid == -1) continue;
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brd = find_lboard_class((lboard_t *)KL_CONFIG_INFO(nasid),
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KLTYPE_ROUTER);
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if (!brd)
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continue;
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do {
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if (brd->brd_flags & DUPLICATE_BOARD)
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continue;
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printk("Router %d:", router_num);
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router_num++;
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router = (klrou_t *)NODE_OFFSET_TO_K0(NASID_GET(brd), brd->brd_compts[0]);
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for (port = 1; port <= MAX_ROUTER_PORTS; port++) {
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if (router->rou_port[port].port_nasid == INVALID_NASID)
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continue;
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dest_brd = (lboard_t *)NODE_OFFSET_TO_K0(
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router->rou_port[port].port_nasid,
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router->rou_port[port].port_offset);
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if (dest_brd->brd_type == KLTYPE_IP27)
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printk(" %d", dest_brd->brd_nasid);
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if (dest_brd->brd_type == KLTYPE_ROUTER)
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printk(" r");
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}
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printk("\n");
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} while ( (brd = find_lboard_class(KLCF_NEXT(brd), KLTYPE_ROUTER)) );
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}
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}
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static unsigned long __init slot_getbasepfn(cnodeid_t cnode, int slot)
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{
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nasid_t nasid = COMPACT_TO_NASID_NODEID(cnode);
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return ((unsigned long)nasid << PFN_NASIDSHFT) | (slot << SLOT_PFNSHIFT);
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}
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static unsigned long __init slot_psize_compute(cnodeid_t node, int slot)
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{
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nasid_t nasid;
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lboard_t *brd;
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klmembnk_t *banks;
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unsigned long size;
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nasid = COMPACT_TO_NASID_NODEID(node);
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/* Find the node board */
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brd = find_lboard((lboard_t *)KL_CONFIG_INFO(nasid), KLTYPE_IP27);
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if (!brd)
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return 0;
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/* Get the memory bank structure */
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banks = (klmembnk_t *) find_first_component(brd, KLSTRUCT_MEMBNK);
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if (!banks)
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return 0;
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/* Size in _Megabytes_ */
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size = (unsigned long)banks->membnk_bnksz[slot/4];
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/* hack for 128 dimm banks */
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if (size <= 128) {
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if (slot % 4 == 0) {
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size <<= 20; /* size in bytes */
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return size >> PAGE_SHIFT;
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} else
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return 0;
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} else {
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size /= 4;
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size <<= 20;
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return size >> PAGE_SHIFT;
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}
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}
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static void __init mlreset(void)
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{
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int i;
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master_nasid = get_nasid();
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fine_mode = is_fine_dirmode();
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/*
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* Probe for all CPUs - this creates the cpumask and sets up the
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* mapping tables. We need to do this as early as possible.
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*/
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#ifdef CONFIG_SMP
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cpu_node_probe();
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#endif
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init_topology_matrix();
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dump_topology();
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gen_region_mask(®ion_mask);
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setup_replication_mask();
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/*
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* Set all nodes' calias sizes to 8k
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*/
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for_each_online_node(i) {
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nasid_t nasid;
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nasid = COMPACT_TO_NASID_NODEID(i);
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/*
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* Always have node 0 in the region mask, otherwise
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* CALIAS accesses get exceptions since the hub
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* thinks it is a node 0 address.
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*/
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REMOTE_HUB_S(nasid, PI_REGION_PRESENT, (region_mask | 1));
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#ifdef CONFIG_REPLICATE_EXHANDLERS
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REMOTE_HUB_S(nasid, PI_CALIAS_SIZE, PI_CALIAS_SIZE_8K);
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#else
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REMOTE_HUB_S(nasid, PI_CALIAS_SIZE, PI_CALIAS_SIZE_0);
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#endif
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#ifdef LATER
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/*
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* Set up all hubs to have a big window pointing at
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* widget 0. Memory mode, widget 0, offset 0
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*/
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REMOTE_HUB_S(nasid, IIO_ITTE(SWIN0_BIGWIN),
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((HUB_PIO_MAP_TO_MEM << IIO_ITTE_IOSP_SHIFT) |
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(0 << IIO_ITTE_WIDGET_SHIFT)));
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#endif
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}
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}
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static void __init szmem(void)
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{
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unsigned long slot_psize, slot0sz = 0, nodebytes; /* Hack to detect problem configs */
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int slot;
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cnodeid_t node;
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for_each_online_node(node) {
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nodebytes = 0;
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for (slot = 0; slot < MAX_MEM_SLOTS; slot++) {
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slot_psize = slot_psize_compute(node, slot);
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if (slot == 0)
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slot0sz = slot_psize;
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/*
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* We need to refine the hack when we have replicated
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* kernel text.
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*/
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nodebytes += (1LL << SLOT_SHIFT);
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if (!slot_psize)
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continue;
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if ((nodebytes >> PAGE_SHIFT) * (sizeof(struct page)) >
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(slot0sz << PAGE_SHIFT)) {
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printk("Ignoring slot %d onwards on node %d\n",
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slot, node);
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slot = MAX_MEM_SLOTS;
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continue;
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}
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memblock_add_node(PFN_PHYS(slot_getbasepfn(node, slot)),
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PFN_PHYS(slot_psize), node);
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}
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}
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}
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static void __init node_mem_init(cnodeid_t node)
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{
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unsigned long slot_firstpfn = slot_getbasepfn(node, 0);
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unsigned long slot_freepfn = node_getfirstfree(node);
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unsigned long start_pfn, end_pfn;
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get_pfn_range_for_nid(node, &start_pfn, &end_pfn);
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/*
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* Allocate the node data structures on the node first.
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*/
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__node_data[node] = __va(slot_freepfn << PAGE_SHIFT);
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memset(__node_data[node], 0, PAGE_SIZE);
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NODE_DATA(node)->node_start_pfn = start_pfn;
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NODE_DATA(node)->node_spanned_pages = end_pfn - start_pfn;
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cpumask_clear(&hub_data(node)->h_cpus);
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slot_freepfn += PFN_UP(sizeof(struct pglist_data) +
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sizeof(struct hub_data));
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free_bootmem_with_active_regions(node, end_pfn);
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memblock_reserve(slot_firstpfn << PAGE_SHIFT,
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((slot_freepfn - slot_firstpfn) << PAGE_SHIFT));
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sparse_memory_present_with_active_regions(node);
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}
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/*
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* A node with nothing. We use it to avoid any special casing in
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* cpumask_of_node
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*/
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static struct node_data null_node = {
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.hub = {
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.h_cpus = CPU_MASK_NONE
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}
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};
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/*
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* Currently, the intranode memory hole support assumes that each slot
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* contains at least 32 MBytes of memory. We assume all bootmem data
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* fits on the first slot.
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*/
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void __init prom_meminit(void)
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{
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cnodeid_t node;
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mlreset();
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szmem();
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for (node = 0; node < MAX_COMPACT_NODES; node++) {
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if (node_online(node)) {
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node_mem_init(node);
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continue;
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}
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__node_data[node] = &null_node;
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}
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}
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void __init prom_free_prom_memory(void)
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{
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/* We got nothing to free here ... */
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}
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extern void setup_zero_pages(void);
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void __init paging_init(void)
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{
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unsigned long zones_size[MAX_NR_ZONES] = {0, };
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unsigned node;
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pagetable_init();
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for_each_online_node(node) {
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unsigned long start_pfn, end_pfn;
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get_pfn_range_for_nid(node, &start_pfn, &end_pfn);
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if (end_pfn > max_low_pfn)
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max_low_pfn = end_pfn;
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}
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zones_size[ZONE_NORMAL] = max_low_pfn;
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free_area_init_nodes(zones_size);
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}
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void __init mem_init(void)
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{
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high_memory = (void *) __va(get_num_physpages() << PAGE_SHIFT);
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memblock_free_all();
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setup_zero_pages(); /* This comes from node 0 */
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mem_init_print_info(NULL);
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}
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