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 #endif 23 24 struct redir_addr { 25 unsigned long redirect; 26 unsigned long alias; 27 }; 28 29 #define DEST_SHIFT UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR_DEST_BASE_SHFT 30 31 static __initdata struct redir_addr redir_addrs[] = { 32 {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR, UVH_SI_ALIAS0_OVERLAY_CONFIG}, 33 {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_1_MMR, UVH_SI_ALIAS1_OVERLAY_CONFIG}, 34 {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_2_MMR, UVH_SI_ALIAS2_OVERLAY_CONFIG}, 35 }; 36 37 static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size) 38 { 39 union uvh_si_alias0_overlay_config_u alias; 40 union uvh_rh_gam_alias210_redirect_config_2_mmr_u redirect; 41 int i; 42 43 for (i = 0; i < ARRAY_SIZE(redir_addrs); i++) { 44 alias.v = uv_read_local_mmr(redir_addrs[i].alias); 45 if (alias.s.base == 0) { 46 *size = (1UL << alias.s.m_alias); 47 redirect.v = uv_read_local_mmr(redir_addrs[i].redirect); 48 *base = (unsigned long)redirect.s.dest_base << DEST_SHIFT; 49 return; 50 } 51 } 52 BUG(); 53 } 54 55 void __init uv_setup(char **cmdline_p) 56 { 57 union uvh_si_addr_map_config_u m_n_config; 58 union uvh_node_id_u node_id; 59 unsigned long gnode_upper; 60 int nid, cpu, m_val, n_val; 61 unsigned long mmr_base, lowmem_redir_base, lowmem_redir_size; 62 63 if (IS_MEDUSA()) { 64 lowmem_redir_base = 0; 65 lowmem_redir_size = 0; 66 node_id.v = 0; 67 m_n_config.s.m_skt = 37; 68 m_n_config.s.n_skt = 0; 69 mmr_base = 0; 70 #if 0 71 /* Need BIOS calls - TDB */ 72 if (!ia64_sn_is_fake_prom()) 73 sn_prom_type = 1; 74 else 75 #endif 76 sn_prom_type = 2; 77 printk(KERN_INFO "Running on medusa with %s PROM\n", 78 (sn_prom_type == 1) ? "real" : "fake"); 79 } else { 80 get_lowmem_redirect(&lowmem_redir_base, &lowmem_redir_size); 81 node_id.v = uv_read_local_mmr(UVH_NODE_ID); 82 m_n_config.v = uv_read_local_mmr(UVH_SI_ADDR_MAP_CONFIG); 83 mmr_base = 84 uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) & 85 ~UV_MMR_ENABLE; 86 } 87 88 m_val = m_n_config.s.m_skt; 89 n_val = m_n_config.s.n_skt; 90 printk(KERN_DEBUG "UV: global MMR base 0x%lx\n", mmr_base); 91 92 gnode_upper = (((unsigned long)node_id.s.node_id) & 93 ~((1 << n_val) - 1)) << m_val; 94 95 for_each_present_cpu(cpu) { 96 nid = cpu_to_node(cpu); 97 uv_cpu_hub_info(cpu)->lowmem_remap_base = lowmem_redir_base; 98 uv_cpu_hub_info(cpu)->lowmem_remap_top = 99 lowmem_redir_base + lowmem_redir_size; 100 uv_cpu_hub_info(cpu)->m_val = m_val; 101 uv_cpu_hub_info(cpu)->n_val = m_val; 102 uv_cpu_hub_info(cpu)->pnode_mask = (1 << n_val) -1; 103 uv_cpu_hub_info(cpu)->gpa_mask = (1 << (m_val + n_val)) - 1; 104 uv_cpu_hub_info(cpu)->gnode_upper = gnode_upper; 105 uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base; 106 uv_cpu_hub_info(cpu)->coherency_domain_number = 0;/* ZZZ */ 107 printk(KERN_DEBUG "UV cpu %d, nid %d\n", cpu, nid); 108 } 109 } 110 111