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
19 bool ia64_is_uv;
20 EXPORT_SYMBOL_GPL(ia64_is_uv);
21
22 DEFINE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
23 EXPORT_PER_CPU_SYMBOL_GPL(__uv_hub_info);
24
25 struct 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
32 static __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
get_lowmem_redirect(unsigned long * base,unsigned long * size)38 static __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
uv_probe_system_type(void)56 void __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
uv_setup(char ** cmdline_p)84 void __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