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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 | /* * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * SGI UV Core Functions * * Copyright (C) 2008 Silicon Graphics, Inc. All rights reserved. */ #include <linux/acpi.h> #include <linux/efi.h> #include <linux/module.h> #include <linux/percpu.h> #include <asm/uv/uv.h> #include <asm/uv/uv_mmrs.h> #include <asm/uv/uv_hub.h> bool ia64_is_uv; EXPORT_SYMBOL_GPL(ia64_is_uv); DEFINE_PER_CPU(struct uv_hub_info_s, __uv_hub_info); EXPORT_PER_CPU_SYMBOL_GPL(__uv_hub_info); struct redir_addr { unsigned long redirect; unsigned long alias; }; #define DEST_SHIFT UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR_DEST_BASE_SHFT static __initdata struct redir_addr redir_addrs[] = { {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR, UVH_SI_ALIAS0_OVERLAY_CONFIG}, {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_1_MMR, UVH_SI_ALIAS1_OVERLAY_CONFIG}, {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_2_MMR, UVH_SI_ALIAS2_OVERLAY_CONFIG}, }; static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size) { union uvh_si_alias0_overlay_config_u alias; union uvh_rh_gam_alias210_redirect_config_2_mmr_u redirect; int i; for (i = 0; i < ARRAY_SIZE(redir_addrs); i++) { alias.v = uv_read_local_mmr(redir_addrs[i].alias); if (alias.s.base == 0) { *size = (1UL << alias.s.m_alias); redirect.v = uv_read_local_mmr(redir_addrs[i].redirect); *base = (unsigned long)redirect.s.dest_base << DEST_SHIFT; return; } } BUG(); } void __init uv_probe_system_type(void) { struct acpi_table_rsdp *rsdp; struct acpi_table_xsdt *xsdt; if (efi.acpi20 == EFI_INVALID_TABLE_ADDR) { pr_err("ACPI 2.0 RSDP not found.\n"); return; } rsdp = (struct acpi_table_rsdp *)__va(efi.acpi20); if (strncmp(rsdp->signature, ACPI_SIG_RSDP, sizeof(ACPI_SIG_RSDP) - 1)) { pr_err("ACPI 2.0 RSDP signature incorrect.\n"); return; } xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_physical_address); if (strncmp(xsdt->header.signature, ACPI_SIG_XSDT, sizeof(ACPI_SIG_XSDT) - 1)) { pr_err("ACPI 2.0 XSDT signature incorrect.\n"); return; } if (!strcmp(xsdt->header.oem_id, "SGI") && !strcmp(xsdt->header.oem_table_id + 4, "UV")) ia64_is_uv = true; } void __init uv_setup(char **cmdline_p) { union uvh_si_addr_map_config_u m_n_config; union uvh_node_id_u node_id; unsigned long gnode_upper; int nid, cpu, m_val, n_val; unsigned long mmr_base, lowmem_redir_base, lowmem_redir_size; get_lowmem_redirect(&lowmem_redir_base, &lowmem_redir_size); node_id.v = uv_read_local_mmr(UVH_NODE_ID); m_n_config.v = uv_read_local_mmr(UVH_SI_ADDR_MAP_CONFIG); mmr_base = uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) & ~UV_MMR_ENABLE; m_val = m_n_config.s.m_skt; n_val = m_n_config.s.n_skt; printk(KERN_DEBUG "UV: global MMR base 0x%lx\n", mmr_base); gnode_upper = (((unsigned long)node_id.s.node_id) & ~((1 << n_val) - 1)) << m_val; for_each_present_cpu(cpu) { nid = cpu_to_node(cpu); uv_cpu_hub_info(cpu)->lowmem_remap_base = lowmem_redir_base; uv_cpu_hub_info(cpu)->lowmem_remap_top = lowmem_redir_base + lowmem_redir_size; uv_cpu_hub_info(cpu)->m_val = m_val; uv_cpu_hub_info(cpu)->n_val = n_val; uv_cpu_hub_info(cpu)->pnode_mask = (1 << n_val) -1; uv_cpu_hub_info(cpu)->gpa_mask = (1 << (m_val + n_val)) - 1; uv_cpu_hub_info(cpu)->gnode_upper = gnode_upper; uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base; uv_cpu_hub_info(cpu)->coherency_domain_number = 0;/* ZZZ */ printk(KERN_DEBUG "UV cpu %d, nid %d\n", cpu, nid); } } |