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@@ -0,0 +1,98 @@
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+/*
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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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+ * SGI UV Core Functions
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+ *
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+ * Copyright (C) 2008 Silicon Graphics, Inc. All rights reserved.
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/percpu.h>
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+#include <asm/sn/simulator.h>
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+#include <asm/uv/uv_mmrs.h>
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+#include <asm/uv/uv_hub.h>
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+
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+DEFINE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
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+EXPORT_PER_CPU_SYMBOL_GPL(__uv_hub_info);
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+
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+
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+struct redir_addr {
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+ unsigned long redirect;
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+ unsigned long alias;
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+};
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+
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+#define DEST_SHIFT UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR_DEST_BASE_SHFT
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+
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+static __initdata struct redir_addr redir_addrs[] = {
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+ {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR, UVH_SI_ALIAS0_OVERLAY_CONFIG},
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+ {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_1_MMR, UVH_SI_ALIAS1_OVERLAY_CONFIG},
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+ {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_2_MMR, UVH_SI_ALIAS2_OVERLAY_CONFIG},
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+};
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+
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+static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size)
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+{
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+ union uvh_si_alias0_overlay_config_u alias;
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+ union uvh_rh_gam_alias210_redirect_config_2_mmr_u redirect;
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+ int i;
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+
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+ for (i = 0; i < ARRAY_SIZE(redir_addrs); i++) {
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+ alias.v = uv_read_local_mmr(redir_addrs[i].alias);
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+ if (alias.s.base == 0) {
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+ *size = (1UL << alias.s.m_alias);
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+ redirect.v = uv_read_local_mmr(redir_addrs[i].redirect);
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+ *base = (unsigned long)redirect.s.dest_base << DEST_SHIFT;
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+ return;
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+ }
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+ }
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+ BUG();
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+}
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+
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+void __init uv_setup(char **cmdline_p)
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+{
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+ union uvh_si_addr_map_config_u m_n_config;
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+ union uvh_node_id_u node_id;
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+ unsigned long gnode_upper;
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+ int nid, cpu, m_val, n_val;
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+ unsigned long mmr_base, lowmem_redir_base, lowmem_redir_size;
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+
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+ if (IS_MEDUSA()) {
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+ lowmem_redir_base = 0;
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+ lowmem_redir_size = 0;
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+ node_id.v = 0;
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+ m_n_config.s.m_skt = 37;
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+ m_n_config.s.n_skt = 0;
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+ mmr_base = 0;
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+ } else {
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+ get_lowmem_redirect(&lowmem_redir_base, &lowmem_redir_size);
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+ node_id.v = uv_read_local_mmr(UVH_NODE_ID);
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+ m_n_config.v = uv_read_local_mmr(UVH_SI_ADDR_MAP_CONFIG);
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+ mmr_base =
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+ uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) &
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+ ~UV_MMR_ENABLE;
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+ }
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+
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+ m_val = m_n_config.s.m_skt;
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+ n_val = m_n_config.s.n_skt;
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+ printk(KERN_DEBUG "UV: global MMR base 0x%lx\n", mmr_base);
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+
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+ gnode_upper = (((unsigned long)node_id.s.node_id) &
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+ ~((1 << n_val) - 1)) << m_val;
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+
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+ for_each_present_cpu(cpu) {
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+ nid = cpu_to_node(cpu);
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+ uv_cpu_hub_info(cpu)->lowmem_remap_base = lowmem_redir_base;
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+ uv_cpu_hub_info(cpu)->lowmem_remap_top =
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+ lowmem_redir_base + lowmem_redir_size;
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+ uv_cpu_hub_info(cpu)->m_val = m_val;
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+ uv_cpu_hub_info(cpu)->n_val = m_val;
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+ uv_cpu_hub_info(cpu)->pnode_mask = (1 << n_val) -1;
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+ uv_cpu_hub_info(cpu)->gpa_mask = (1 << (m_val + n_val)) - 1;
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+ uv_cpu_hub_info(cpu)->gnode_upper = gnode_upper;
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+ uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base;
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+ uv_cpu_hub_info(cpu)->coherency_domain_number = 0;/* ZZZ */
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+ printk(KERN_DEBUG "UV cpu %d, nid %d\n", cpu, nid);
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+ }
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+}
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+
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Jack Steiner