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/acpi.h> 12#include <linux/efi.h> 13#include <linux/module.h> 14#include <linux/percpu.h> 15#include <asm/uv/uv.h> 16#include <asm/uv/uv_mmrs.h> 17#include <asm/uv/uv_hub.h> 18 19bool ia64_is_uv; 20EXPORT_SYMBOL_GPL(ia64_is_uv); 21 22DEFINE_PER_CPU(struct uv_hub_info_s, __uv_hub_info); 23EXPORT_PER_CPU_SYMBOL_GPL(__uv_hub_info); 24 25struct redir_addr { 26 unsigned long redirect; 27 unsigned long alias; 28}; 29 30#define DEST_SHIFT UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR_DEST_BASE_SHFT 31 32static __initdata struct redir_addr redir_addrs[] = { 33 {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR, UVH_SI_ALIAS0_OVERLAY_CONFIG}, 34 {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_1_MMR, UVH_SI_ALIAS1_OVERLAY_CONFIG}, 35 {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_2_MMR, UVH_SI_ALIAS2_OVERLAY_CONFIG}, 36}; 37 38static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size) 39{ 40 union uvh_si_alias0_overlay_config_u alias; 41 union uvh_rh_gam_alias210_redirect_config_2_mmr_u redirect; 42 int i; 43 44 for (i = 0; i < ARRAY_SIZE(redir_addrs); i++) { 45 alias.v = uv_read_local_mmr(redir_addrs[i].alias); 46 if (alias.s.base == 0) { 47 *size = (1UL << alias.s.m_alias); 48 redirect.v = uv_read_local_mmr(redir_addrs[i].redirect); 49 *base = (unsigned long)redirect.s.dest_base << DEST_SHIFT; 50 return; 51 } 52 } 53 BUG(); 54} 55 56void __init uv_probe_system_type(void) 57{ 58 struct acpi_table_rsdp *rsdp; 59 struct acpi_table_xsdt *xsdt; 60 61 if (efi.acpi20 == EFI_INVALID_TABLE_ADDR) { 62 pr_err("ACPI 2.0 RSDP not found.\n"); 63 return; 64 } 65 66 rsdp = (struct acpi_table_rsdp *)__va(efi.acpi20); 67 if (strncmp(rsdp->signature, ACPI_SIG_RSDP, sizeof(ACPI_SIG_RSDP) - 1)) { 68 pr_err("ACPI 2.0 RSDP signature incorrect.\n"); 69 return; 70 } 71 72 xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_physical_address); 73 if (strncmp(xsdt->header.signature, ACPI_SIG_XSDT, 74 sizeof(ACPI_SIG_XSDT) - 1)) { 75 pr_err("ACPI 2.0 XSDT signature incorrect.\n"); 76 return; 77 } 78 79 if (!strcmp(xsdt->header.oem_id, "SGI") && 80 !strcmp(xsdt->header.oem_table_id + 4, "UV")) 81 ia64_is_uv = true; 82} 83 84void __init uv_setup(char **cmdline_p) 85{ 86 union uvh_si_addr_map_config_u m_n_config; 87 union uvh_node_id_u node_id; 88 unsigned long gnode_upper; 89 int nid, cpu, m_val, n_val; 90 unsigned long mmr_base, lowmem_redir_base, lowmem_redir_size; 91 92 get_lowmem_redirect(&lowmem_redir_base, &lowmem_redir_size); 93 node_id.v = uv_read_local_mmr(UVH_NODE_ID); 94 m_n_config.v = uv_read_local_mmr(UVH_SI_ADDR_MAP_CONFIG); 95 mmr_base = uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) & 96 ~UV_MMR_ENABLE; 97 98 m_val = m_n_config.s.m_skt; 99 n_val = m_n_config.s.n_skt; 100 printk(KERN_DEBUG "UV: global MMR base 0x%lx\n", mmr_base); 101 102 gnode_upper = (((unsigned long)node_id.s.node_id) & 103 ~((1 << n_val) - 1)) << m_val; 104 105 for_each_present_cpu(cpu) { 106 nid = cpu_to_node(cpu); 107 uv_cpu_hub_info(cpu)->lowmem_remap_base = lowmem_redir_base; 108 uv_cpu_hub_info(cpu)->lowmem_remap_top = 109 lowmem_redir_base + lowmem_redir_size; 110 uv_cpu_hub_info(cpu)->m_val = m_val; 111 uv_cpu_hub_info(cpu)->n_val = n_val; 112 uv_cpu_hub_info(cpu)->pnode_mask = (1 << n_val) -1; 113 uv_cpu_hub_info(cpu)->gpa_mask = (1 << (m_val + n_val)) - 1; 114 uv_cpu_hub_info(cpu)->gnode_upper = gnode_upper; 115 uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base; 116 uv_cpu_hub_info(cpu)->coherency_domain_number = 0;/* ZZZ */ 117 printk(KERN_DEBUG "UV cpu %d, nid %d\n", cpu, nid); 118 } 119} 120 121