arch/ia64/uv/kernel/setup.c

   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