forked from luck/tmp_suning_uos_patched
4bf841ebf1
Node ids don't need to be contiguous in Linux, so the concept to use compact node ids to make them contiguous isn't needed at all. This patchset therefore removes it. Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de> Signed-off-by: Paul Burton <paul.burton@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: James Hogan <jhogan@kernel.org> Cc: linux-mips@vger.kernel.org Cc: linux-kernel@vger.kernel.org
130 lines
3.6 KiB
C
130 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Ported from IRIX to Linux by Kanoj Sarcar, 06/08/00.
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* Copyright 2000 - 2001 Silicon Graphics, Inc.
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* Copyright 2000 - 2001 Kanoj Sarcar (kanoj@sgi.com)
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*/
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#include <linux/init.h>
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#include <linux/mm.h>
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#include <linux/mmzone.h>
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#include <linux/kernel.h>
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#include <linux/nodemask.h>
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#include <linux/string.h>
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#include <asm/page.h>
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#include <asm/sections.h>
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#include <asm/sn/types.h>
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#include <asm/sn/arch.h>
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#include <asm/sn/gda.h>
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#include <asm/sn/hub.h>
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#include <asm/sn/mapped_kernel.h>
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#include <asm/sn/sn_private.h>
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static cpumask_t ktext_repmask;
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/*
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* XXX - This needs to be much smarter about where it puts copies of the
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* kernel. For example, we should never put a copy on a headless node,
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* and we should respect the topology of the machine.
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*/
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void __init setup_replication_mask(void)
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{
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/* Set only the master cnode's bit. The master cnode is always 0. */
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cpumask_clear(&ktext_repmask);
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cpumask_set_cpu(0, &ktext_repmask);
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#ifdef CONFIG_REPLICATE_KTEXT
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#ifndef CONFIG_MAPPED_KERNEL
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#error Kernel replication works with mapped kernel support. No calias support.
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#endif
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{
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nasid_t nasid;
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for_each_online_node(nasid) {
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if (nasid == 0)
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continue;
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/* Advertise that we have a copy of the kernel */
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cpumask_set_cpu(nasid, &ktext_repmask);
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}
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}
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#endif
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/* Set up a GDA pointer to the replication mask. */
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GDA->g_ktext_repmask = &ktext_repmask;
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}
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static __init void set_ktext_source(nasid_t client_nasid, nasid_t server_nasid)
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{
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kern_vars_t *kvp;
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kvp = &hub_data(client_nasid)->kern_vars;
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KERN_VARS_ADDR(client_nasid) = (unsigned long)kvp;
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kvp->kv_magic = KV_MAGIC;
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kvp->kv_ro_nasid = server_nasid;
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kvp->kv_rw_nasid = master_nasid;
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kvp->kv_ro_baseaddr = NODE_CAC_BASE(server_nasid);
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kvp->kv_rw_baseaddr = NODE_CAC_BASE(master_nasid);
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printk("REPLICATION: ON nasid %d, ktext from nasid %d, kdata from nasid %d\n", client_nasid, server_nasid, master_nasid);
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}
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/* XXX - When the BTE works, we should use it instead of this. */
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static __init void copy_kernel(nasid_t dest_nasid)
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{
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unsigned long dest_kern_start, source_start, source_end, kern_size;
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source_start = (unsigned long) _stext;
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source_end = (unsigned long) _etext;
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kern_size = source_end - source_start;
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dest_kern_start = CHANGE_ADDR_NASID(MAPPED_KERN_RO_TO_K0(source_start),
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dest_nasid);
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memcpy((void *)dest_kern_start, (void *)source_start, kern_size);
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}
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void __init replicate_kernel_text(void)
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{
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nasid_t client_nasid;
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nasid_t server_nasid;
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server_nasid = master_nasid;
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/* Record where the master node should get its kernel text */
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set_ktext_source(master_nasid, master_nasid);
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for_each_online_node(client_nasid) {
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if (client_nasid == 0)
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continue;
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/* Check if this node should get a copy of the kernel */
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if (cpumask_test_cpu(client_nasid, &ktext_repmask)) {
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server_nasid = client_nasid;
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copy_kernel(server_nasid);
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}
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/* Record where this node should get its kernel text */
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set_ktext_source(client_nasid, server_nasid);
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}
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}
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/*
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* Return pfn of first free page of memory on a node. PROM may allocate
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* data structures on the first couple of pages of the first slot of each
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* node. If this is the case, getfirstfree(node) > getslotstart(node, 0).
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*/
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unsigned long node_getfirstfree(nasid_t nasid)
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{
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unsigned long loadbase = REP_BASE;
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unsigned long offset;
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#ifdef CONFIG_MAPPED_KERNEL
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loadbase += 16777216;
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#endif
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offset = PAGE_ALIGN((unsigned long)(&_end)) - loadbase;
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if ((nasid == 0) || (cpumask_test_cpu(nasid, &ktext_repmask)))
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return TO_NODE(nasid, offset) >> PAGE_SHIFT;
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else
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return KDM_TO_PHYS(PAGE_ALIGN(SYMMON_STK_ADDR(nasid, 0))) >> PAGE_SHIFT;
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}
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