linux/arch/ia64/uv/kernel/setup.c
<<
>>
Prefs
   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#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