1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * SGI UV Core Functions 7 * 8 * Copyright (C) 2008 Silicon Graphics, Inc. All rights reserved. 9 */ 10 11 #include <linux/module.h> 12 #include <linux/percpu.h> 13 #include <asm/sn/simulator.h> 14 #include <asm/uv/uv_mmrs.h> 15 #include <asm/uv/uv_hub.h> 16 17 DEFINE_PER_CPU(struct uv_hub_info_s, __uv_hub_info); 18 EXPORT_PER_CPU_SYMBOL_GPL(__uv_hub_info); 19 20 #ifdef CONFIG_IA64_SGI_UV 21 int sn_prom_type; 22 long sn_partition_id; 23 EXPORT_SYMBOL(sn_partition_id); 24 long sn_coherency_id; 25 EXPORT_SYMBOL_GPL(sn_coherency_id); 26 long sn_region_size; 27 EXPORT_SYMBOL(sn_region_size); 28 #endif 29 30 struct redir_addr { 31 unsigned long redirect; 32 unsigned long alias; 33 }; 34 35 #define DEST_SHIFT UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR_DEST_BASE_SHFT 36 37 static __initdata struct redir_addr redir_addrs[] = { 38 {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR, UVH_SI_ALIAS0_OVERLAY_CONFIG}, 39 {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_1_MMR, UVH_SI_ALIAS1_OVERLAY_CONFIG}, 40 {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_2_MMR, UVH_SI_ALIAS2_OVERLAY_CONFIG}, 41 }; 42 43 static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size) 44 { 45 union uvh_si_alias0_overlay_config_u alias; 46 union uvh_rh_gam_alias210_redirect_config_2_mmr_u redirect; 47 int i; 48 49 for (i = 0; i < ARRAY_SIZE(redir_addrs); i++) { 50 alias.v = uv_read_local_mmr(redir_addrs[i].alias); 51 if (alias.s.base == 0) { 52 *size = (1UL << alias.s.m_alias); 53 redirect.v = uv_read_local_mmr(redir_addrs[i].redirect); 54 *base = (unsigned long)redirect.s.dest_base << DEST_SHIFT; 55 return; 56 } 57 } 58 BUG(); 59 } 60 61 void __init uv_setup(char **cmdline_p) 62 { 63 union uvh_si_addr_map_config_u m_n_config; 64 union uvh_node_id_u node_id; 65 unsigned long gnode_upper; 66 int nid, cpu, m_val, n_val; 67 unsigned long mmr_base, lowmem_redir_base, lowmem_redir_size; 68 69 if (IS_MEDUSA()) { 70 lowmem_redir_base = 0; 71 lowmem_redir_size = 0; 72 node_id.v = 0; 73 m_n_config.s.m_skt = 37; 74 m_n_config.s.n_skt = 0; 75 mmr_base = 0; 76 #if 0 77 /* Need BIOS calls - TDB */ 78 if (!ia64_sn_is_fake_prom()) 79 sn_prom_type = 1; 80 else 81 #endif 82 sn_prom_type = 2; 83 printk(KERN_INFO "Running on medusa with %s PROM\n", 84 (sn_prom_type == 1) ? "real" : "fake"); 85 } else { 86 get_lowmem_redirect(&lowmem_redir_base, &lowmem_redir_size); 87 node_id.v = uv_read_local_mmr(UVH_NODE_ID); 88 m_n_config.v = uv_read_local_mmr(UVH_SI_ADDR_MAP_CONFIG); 89 mmr_base = 90 uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) & 91 ~UV_MMR_ENABLE; 92 } 93 94 m_val = m_n_config.s.m_skt; 95 n_val = m_n_config.s.n_skt; 96 printk(KERN_DEBUG "UV: global MMR base 0x%lx\n", mmr_base); 97 98 gnode_upper = (((unsigned long)node_id.s.node_id) & 99 ~((1 << n_val) - 1)) << m_val; 100 101 for_each_present_cpu(cpu) { 102 nid = cpu_to_node(cpu); 103 uv_cpu_hub_info(cpu)->lowmem_remap_base = lowmem_redir_base; 104 uv_cpu_hub_info(cpu)->lowmem_remap_top = 105 lowmem_redir_base + lowmem_redir_size; 106 uv_cpu_hub_info(cpu)->m_val = m_val; 107 uv_cpu_hub_info(cpu)->n_val = n_val; 108 uv_cpu_hub_info(cpu)->pnode_mask = (1 << n_val) -1; 109 uv_cpu_hub_info(cpu)->gpa_mask = (1 << (m_val + n_val)) - 1; 110 uv_cpu_hub_info(cpu)->gnode_upper = gnode_upper; 111 uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base; 112 uv_cpu_hub_info(cpu)->coherency_domain_number = 0;/* ZZZ */ 113 printk(KERN_DEBUG "UV cpu %d, nid %d\n", cpu, nid); 114 } 115 } 116 117