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 17DEFINE_PER_CPU(struct uv_hub_info_s, __uv_hub_info); 18EXPORT_PER_CPU_SYMBOL_GPL(__uv_hub_info); 19 20#ifdef CONFIG_IA64_SGI_UV 21int sn_prom_type; 22long sn_partition_id; 23EXPORT_SYMBOL(sn_partition_id); 24long sn_coherency_id; 25EXPORT_SYMBOL_GPL(sn_coherency_id); 26long sn_region_size; 27EXPORT_SYMBOL(sn_region_size); 28#endif 29 30struct 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 37static __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 43static __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 61void __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 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 = n_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