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authorThomas Gleixner <tglx@linutronix.de>2008-05-17 17:12:24 +0200
committerThomas Gleixner <tglx@linutronix.de>2008-05-17 17:12:24 +0200
commit538f0fd0f210c2ce5c585799f18d0e5c7cf6155e (patch)
treee9fa2b10ce5d92ac6bcd8ac55af1cd97bda3ec5d /arch/ia64/uv/kernel/setup.c
parent3bb6fbf9969a8bbe4892968659239273d092e78a (diff)
parentf26a3988917913b3d11b2bd741601a2c64ab9204 (diff)
Merge branch 'linus' into x86/garttip-x86-gart-2008-05-17-15-12-25
Diffstat (limited to 'arch/ia64/uv/kernel/setup.c')
-rw-r--r--arch/ia64/uv/kernel/setup.c98
1 files changed, 98 insertions, 0 deletions
diff --git a/arch/ia64/uv/kernel/setup.c b/arch/ia64/uv/kernel/setup.c
new file mode 100644
index 000000000000..9aa743203c3c
--- /dev/null
+++ b/arch/ia64/uv/kernel/setup.c
@@ -0,0 +1,98 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * SGI UV Core Functions
+ *
+ * Copyright (C) 2008 Silicon Graphics, Inc. All rights reserved.
+ */
+
+#include <linux/module.h>
+#include <linux/percpu.h>
+#include <asm/sn/simulator.h>
+#include <asm/uv/uv_mmrs.h>
+#include <asm/uv/uv_hub.h>
+
+DEFINE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
+EXPORT_PER_CPU_SYMBOL_GPL(__uv_hub_info);
+
+
+struct redir_addr {
+ unsigned long redirect;
+ unsigned long alias;
+};
+
+#define DEST_SHIFT UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR_DEST_BASE_SHFT
+
+static __initdata struct redir_addr redir_addrs[] = {
+ {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR, UVH_SI_ALIAS0_OVERLAY_CONFIG},
+ {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_1_MMR, UVH_SI_ALIAS1_OVERLAY_CONFIG},
+ {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_2_MMR, UVH_SI_ALIAS2_OVERLAY_CONFIG},
+};
+
+static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size)
+{
+ union uvh_si_alias0_overlay_config_u alias;
+ union uvh_rh_gam_alias210_redirect_config_2_mmr_u redirect;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(redir_addrs); i++) {
+ alias.v = uv_read_local_mmr(redir_addrs[i].alias);
+ if (alias.s.base == 0) {
+ *size = (1UL << alias.s.m_alias);
+ redirect.v = uv_read_local_mmr(redir_addrs[i].redirect);
+ *base = (unsigned long)redirect.s.dest_base << DEST_SHIFT;
+ return;
+ }
+ }
+ BUG();
+}
+
+void __init uv_setup(char **cmdline_p)
+{
+ union uvh_si_addr_map_config_u m_n_config;
+ union uvh_node_id_u node_id;
+ unsigned long gnode_upper;
+ int nid, cpu, m_val, n_val;
+ unsigned long mmr_base, lowmem_redir_base, lowmem_redir_size;
+
+ if (IS_MEDUSA()) {
+ lowmem_redir_base = 0;
+ lowmem_redir_size = 0;
+ node_id.v = 0;
+ m_n_config.s.m_skt = 37;
+ m_n_config.s.n_skt = 0;
+ mmr_base = 0;
+ } else {
+ get_lowmem_redirect(&lowmem_redir_base, &lowmem_redir_size);
+ node_id.v = uv_read_local_mmr(UVH_NODE_ID);
+ m_n_config.v = uv_read_local_mmr(UVH_SI_ADDR_MAP_CONFIG);
+ mmr_base =
+ uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) &
+ ~UV_MMR_ENABLE;
+ }
+
+ m_val = m_n_config.s.m_skt;
+ n_val = m_n_config.s.n_skt;
+ printk(KERN_DEBUG "UV: global MMR base 0x%lx\n", mmr_base);
+
+ gnode_upper = (((unsigned long)node_id.s.node_id) &
+ ~((1 << n_val) - 1)) << m_val;
+
+ for_each_present_cpu(cpu) {
+ nid = cpu_to_node(cpu);
+ uv_cpu_hub_info(cpu)->lowmem_remap_base = lowmem_redir_base;
+ uv_cpu_hub_info(cpu)->lowmem_remap_top =
+ lowmem_redir_base + lowmem_redir_size;
+ uv_cpu_hub_info(cpu)->m_val = m_val;
+ uv_cpu_hub_info(cpu)->n_val = m_val;
+ uv_cpu_hub_info(cpu)->pnode_mask = (1 << n_val) -1;
+ uv_cpu_hub_info(cpu)->gpa_mask = (1 << (m_val + n_val)) - 1;
+ uv_cpu_hub_info(cpu)->gnode_upper = gnode_upper;
+ uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base;
+ uv_cpu_hub_info(cpu)->coherency_domain_number = 0;/* ZZZ */
+ printk(KERN_DEBUG "UV cpu %d, nid %d\n", cpu, nid);
+ }
+}
+