Initial commit: OpenHarmony-v4.0-ReleaseOpenHarmony-v4.0-Release

1 files changed, 129 insertions, 0 deletions

diff --git a/arch/mips/sgi-ip27/ip27-klnuma.c b/arch/mips/sgi-ip27/ip27-klnuma.c
new file mode 100644
index 000000000..abd7a84df
--- /dev/null
+++ b/arch/mips/sgi-ip27/ip27-klnuma.c
@@ -0,0 +1,129 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Ported from IRIX to Linux by Kanoj Sarcar, 06/08/00.
+ * Copyright 2000 - 2001 Silicon Graphics, Inc.
+ * Copyright 2000 - 2001 Kanoj Sarcar (kanoj@sgi.com)
+ */
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/mmzone.h>
+#include <linux/kernel.h>
+#include <linux/nodemask.h>
+#include <linux/string.h>
+
+#include <asm/page.h>
+#include <asm/sections.h>
+#include <asm/sn/types.h>
+#include <asm/sn/arch.h>
+#include <asm/sn/gda.h>
+#include <asm/sn/mapped_kernel.h>
+
+#include "ip27-common.h"
+
+static nodemask_t ktext_repmask;
+
+/*
+ * XXX - This needs to be much smarter about where it puts copies of the
+ * kernel.  For example, we should never put a copy on a headless node,
+ * and we should respect the topology of the machine.
+ */
+void __init setup_replication_mask(void)
+{
+        /* Set only the master cnode's bit.  The master cnode is always 0. */
+        nodes_clear(ktext_repmask);
+        node_set(0, ktext_repmask);
+
+#ifdef CONFIG_REPLICATE_KTEXT
+#ifndef CONFIG_MAPPED_KERNEL
+#error Kernel replication works with mapped kernel support. No calias support.
+#endif
+        {
+                nasid_t nasid;
+
+                for_each_online_node(nasid) {
+                        if (nasid == 0)
+                                continue;
+                        /* Advertise that we have a copy of the kernel */
+                        node_set(nasid, ktext_repmask);
+                }
+        }
+#endif
+        /* Set up a GDA pointer to the replication mask. */
+        GDA->g_ktext_repmask = &ktext_repmask;
+}
+
+
+static __init void set_ktext_source(nasid_t client_nasid, nasid_t server_nasid)
+{
+        kern_vars_t *kvp;
+
+        kvp = &hub_data(client_nasid)->kern_vars;
+
+        KERN_VARS_ADDR(client_nasid) = (unsigned long)kvp;
+
+        kvp->kv_magic = KV_MAGIC;
+        kvp->kv_ro_nasid = server_nasid;
+        kvp->kv_rw_nasid = master_nasid;
+        kvp->kv_ro_baseaddr = NODE_CAC_BASE(server_nasid);
+        kvp->kv_rw_baseaddr = NODE_CAC_BASE(master_nasid);
+        printk("REPLICATION: ON nasid %d, ktext from nasid %d, kdata from nasid %d\n", client_nasid, server_nasid, master_nasid);
+}
+
+/* XXX - When the BTE works, we should use it instead of this. */
+static __init void copy_kernel(nasid_t dest_nasid)
+{
+        unsigned long dest_kern_start, source_start, source_end, kern_size;
+
+        source_start = (unsigned long) _stext;
+        source_end = (unsigned long) _etext;
+        kern_size = source_end - source_start;
+
+        dest_kern_start = CHANGE_ADDR_NASID(MAPPED_KERN_RO_TO_K0(source_start),
+                                            dest_nasid);
+        memcpy((void *)dest_kern_start, (void *)source_start, kern_size);
+}
+
+void __init replicate_kernel_text(void)
+{
+        nasid_t client_nasid;
+        nasid_t server_nasid;
+
+        server_nasid = master_nasid;
+
+        /* Record where the master node should get its kernel text */
+        set_ktext_source(master_nasid, master_nasid);
+
+        for_each_online_node(client_nasid) {
+                if (client_nasid == 0)
+                        continue;
+
+                /* Check if this node should get a copy of the kernel */
+                if (node_isset(client_nasid, ktext_repmask)) {
+                        server_nasid = client_nasid;
+                        copy_kernel(server_nasid);
+                }
+
+                /* Record where this node should get its kernel text */
+                set_ktext_source(client_nasid, server_nasid);
+        }
+}
+
+/*
+ * Return pfn of first free page of memory on a node. PROM may allocate
+ * data structures on the first couple of pages of the first slot of each
+ * node. If this is the case, getfirstfree(node) > getslotstart(node, 0).
+ */
+unsigned long node_getfirstfree(nasid_t nasid)
+{
+        unsigned long loadbase = REP_BASE;
+        unsigned long offset;
+
+#ifdef CONFIG_MAPPED_KERNEL
+        loadbase += 16777216;
+#endif
+        offset = PAGE_ALIGN((unsigned long)(&_end)) - loadbase;
+        if ((nasid == 0) || (node_isset(nasid, ktext_repmask)))
+                return TO_NODE(nasid, offset) >> PAGE_SHIFT;
+        else
+                return KDM_TO_PHYS(PAGE_ALIGN(SYMMON_STK_ADDR(nasid, 0))) >> PAGE_SHIFT;
+}