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1da177e4 LT |
1 | /* |
2 | * Written by: Garry Forsgren, Unisys Corporation | |
3 | * Natalie Protasevich, Unisys Corporation | |
4 | * This file contains the code to configure and interface | |
5 | * with Unisys ES7000 series hardware system manager. | |
6 | * | |
7 | * Copyright (c) 2003 Unisys Corporation. All Rights Reserved. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify it | |
10 | * under the terms of version 2 of the GNU General Public License as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it would be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License along | |
18 | * with this program; if not, write the Free Software Foundation, Inc., 59 | |
19 | * Temple Place - Suite 330, Boston MA 02111-1307, USA. | |
20 | * | |
21 | * Contact information: Unisys Corporation, Township Line & Union Meeting | |
22 | * Roads-A, Unisys Way, Blue Bell, Pennsylvania, 19424, or: | |
23 | * | |
24 | * http://www.unisys.com | |
25 | */ | |
26 | ||
27 | #include <linux/module.h> | |
28 | #include <linux/types.h> | |
29 | #include <linux/kernel.h> | |
30 | #include <linux/smp.h> | |
31 | #include <linux/string.h> | |
32 | #include <linux/spinlock.h> | |
33 | #include <linux/errno.h> | |
34 | #include <linux/notifier.h> | |
35 | #include <linux/reboot.h> | |
36 | #include <linux/init.h> | |
37 | #include <linux/acpi.h> | |
38 | #include <asm/io.h> | |
39 | #include <asm/nmi.h> | |
40 | #include <asm/smp.h> | |
41 | #include <asm/apicdef.h> | |
42 | #include "es7000.h" | |
43 | ||
44 | /* | |
45 | * ES7000 Globals | |
46 | */ | |
47 | ||
48 | volatile unsigned long *psai = NULL; | |
49 | struct mip_reg *mip_reg; | |
50 | struct mip_reg *host_reg; | |
51 | int mip_port; | |
52 | unsigned long mip_addr, host_addr; | |
53 | ||
54 | #if defined(CONFIG_X86_IO_APIC) && (defined(CONFIG_ACPI_INTERPRETER) || defined(CONFIG_ACPI_BOOT)) | |
55 | ||
56 | /* | |
57 | * GSI override for ES7000 platforms. | |
58 | */ | |
59 | ||
60 | static unsigned int base; | |
61 | ||
62 | static int | |
63 | es7000_rename_gsi(int ioapic, int gsi) | |
64 | { | |
65 | if (!base) { | |
66 | int i; | |
67 | for (i = 0; i < nr_ioapics; i++) | |
68 | base += nr_ioapic_registers[i]; | |
69 | } | |
70 | ||
71 | if (!ioapic && (gsi < 16)) | |
72 | gsi += base; | |
73 | return gsi; | |
74 | } | |
75 | ||
76 | #endif // (CONFIG_X86_IO_APIC) && (CONFIG_ACPI_INTERPRETER || CONFIG_ACPI_BOOT) | |
77 | ||
78 | /* | |
79 | * Parse the OEM Table | |
80 | */ | |
81 | ||
82 | int __init | |
83 | parse_unisys_oem (char *oemptr, int oem_entries) | |
84 | { | |
85 | int i; | |
86 | int success = 0; | |
87 | unsigned char type, size; | |
88 | unsigned long val; | |
89 | char *tp = NULL; | |
90 | struct psai *psaip = NULL; | |
91 | struct mip_reg_info *mi; | |
92 | struct mip_reg *host, *mip; | |
93 | ||
94 | tp = oemptr; | |
95 | ||
96 | tp += 8; | |
97 | ||
98 | for (i=0; i <= oem_entries; i++) { | |
99 | type = *tp++; | |
100 | size = *tp++; | |
101 | tp -= 2; | |
102 | switch (type) { | |
103 | case MIP_REG: | |
104 | mi = (struct mip_reg_info *)tp; | |
105 | val = MIP_RD_LO(mi->host_reg); | |
106 | host_addr = val; | |
107 | host = (struct mip_reg *)val; | |
108 | host_reg = __va(host); | |
109 | val = MIP_RD_LO(mi->mip_reg); | |
110 | mip_port = MIP_PORT(mi->mip_info); | |
111 | mip_addr = val; | |
112 | mip = (struct mip_reg *)val; | |
113 | mip_reg = __va(mip); | |
114 | Dprintk("es7000_mipcfg: host_reg = 0x%lx \n", | |
115 | (unsigned long)host_reg); | |
116 | Dprintk("es7000_mipcfg: mip_reg = 0x%lx \n", | |
117 | (unsigned long)mip_reg); | |
118 | success++; | |
119 | break; | |
120 | case MIP_PSAI_REG: | |
121 | psaip = (struct psai *)tp; | |
122 | if (tp != NULL) { | |
123 | if (psaip->addr) | |
124 | psai = __va(psaip->addr); | |
125 | else | |
126 | psai = NULL; | |
127 | success++; | |
128 | } | |
129 | break; | |
130 | default: | |
131 | break; | |
132 | } | |
133 | if (i == 6) break; | |
134 | tp += size; | |
135 | } | |
136 | ||
137 | if (success < 2) { | |
138 | es7000_plat = 0; | |
139 | } else { | |
140 | printk("\nEnabling ES7000 specific features...\n"); | |
141 | /* | |
142 | * Determine the generation of the ES7000 currently running. | |
143 | * | |
144 | * es7000_plat = 0 if the machine is NOT a Unisys ES7000 box | |
145 | * es7000_plat = 1 if the machine is a 5xx ES7000 box | |
146 | * es7000_plat = 2 if the machine is a x86_64 ES7000 box | |
147 | * | |
148 | */ | |
149 | if (!(boot_cpu_data.x86 <= 15 && boot_cpu_data.x86_model <= 2)) | |
150 | es7000_plat = 2; | |
151 | else | |
152 | es7000_plat = 1; | |
153 | ||
154 | ioapic_renumber_irq = es7000_rename_gsi; | |
155 | } | |
156 | return es7000_plat; | |
157 | } | |
158 | ||
159 | int __init | |
160 | find_unisys_acpi_oem_table(unsigned long *oem_addr, int *length) | |
161 | { | |
162 | struct acpi_table_rsdp *rsdp = NULL; | |
163 | unsigned long rsdp_phys = 0; | |
164 | struct acpi_table_header *header = NULL; | |
165 | int i; | |
166 | struct acpi_table_sdt sdt; | |
167 | ||
168 | rsdp_phys = acpi_find_rsdp(); | |
169 | rsdp = __va(rsdp_phys); | |
170 | if (rsdp->rsdt_address) { | |
171 | struct acpi_table_rsdt *mapped_rsdt = NULL; | |
172 | sdt.pa = rsdp->rsdt_address; | |
173 | ||
174 | header = (struct acpi_table_header *) | |
175 | __acpi_map_table(sdt.pa, sizeof(struct acpi_table_header)); | |
176 | if (!header) | |
177 | return -ENODEV; | |
178 | ||
179 | sdt.count = (header->length - sizeof(struct acpi_table_header)) >> 3; | |
180 | mapped_rsdt = (struct acpi_table_rsdt *) | |
181 | __acpi_map_table(sdt.pa, header->length); | |
182 | if (!mapped_rsdt) | |
183 | return -ENODEV; | |
184 | ||
185 | header = &mapped_rsdt->header; | |
186 | ||
187 | for (i = 0; i < sdt.count; i++) | |
188 | sdt.entry[i].pa = (unsigned long) mapped_rsdt->entry[i]; | |
189 | }; | |
190 | for (i = 0; i < sdt.count; i++) { | |
191 | ||
192 | header = (struct acpi_table_header *) | |
193 | __acpi_map_table(sdt.entry[i].pa, | |
194 | sizeof(struct acpi_table_header)); | |
195 | if (!header) | |
196 | continue; | |
197 | if (!strncmp((char *) &header->signature, "OEM1", 4)) { | |
198 | if (!strncmp((char *) &header->oem_id, "UNISYS", 6)) { | |
199 | void *addr; | |
200 | struct oem_table *t; | |
201 | acpi_table_print(header, sdt.entry[i].pa); | |
202 | t = (struct oem_table *) __acpi_map_table(sdt.entry[i].pa, header->length); | |
203 | addr = (void *) __acpi_map_table(t->OEMTableAddr, t->OEMTableSize); | |
204 | *length = header->length; | |
205 | *oem_addr = (unsigned long) addr; | |
206 | return 0; | |
207 | } | |
208 | } | |
209 | } | |
210 | Dprintk("ES7000: did not find Unisys ACPI OEM table!\n"); | |
211 | return -1; | |
212 | } | |
213 | ||
214 | static void | |
215 | es7000_spin(int n) | |
216 | { | |
217 | int i = 0; | |
218 | ||
219 | while (i++ < n) | |
220 | rep_nop(); | |
221 | } | |
222 | ||
223 | static int __init | |
224 | es7000_mip_write(struct mip_reg *mip_reg) | |
225 | { | |
226 | int status = 0; | |
227 | int spin; | |
228 | ||
229 | spin = MIP_SPIN; | |
230 | while (((unsigned long long)host_reg->off_38 & | |
231 | (unsigned long long)MIP_VALID) != 0) { | |
232 | if (--spin <= 0) { | |
233 | printk("es7000_mip_write: Timeout waiting for Host Valid Flag"); | |
234 | return -1; | |
235 | } | |
236 | es7000_spin(MIP_SPIN); | |
237 | } | |
238 | ||
239 | memcpy(host_reg, mip_reg, sizeof(struct mip_reg)); | |
240 | outb(1, mip_port); | |
241 | ||
242 | spin = MIP_SPIN; | |
243 | ||
244 | while (((unsigned long long)mip_reg->off_38 & | |
245 | (unsigned long long)MIP_VALID) == 0) { | |
246 | if (--spin <= 0) { | |
247 | printk("es7000_mip_write: Timeout waiting for MIP Valid Flag"); | |
248 | return -1; | |
249 | } | |
250 | es7000_spin(MIP_SPIN); | |
251 | } | |
252 | ||
253 | status = ((unsigned long long)mip_reg->off_0 & | |
254 | (unsigned long long)0xffff0000000000ULL) >> 48; | |
255 | mip_reg->off_38 = ((unsigned long long)mip_reg->off_38 & | |
256 | (unsigned long long)~MIP_VALID); | |
257 | return status; | |
258 | } | |
259 | ||
260 | int | |
261 | es7000_start_cpu(int cpu, unsigned long eip) | |
262 | { | |
263 | unsigned long vect = 0, psaival = 0; | |
264 | ||
265 | if (psai == NULL) | |
266 | return -1; | |
267 | ||
268 | vect = ((unsigned long)__pa(eip)/0x1000) << 16; | |
269 | psaival = (0x1000000 | vect | cpu); | |
270 | ||
271 | while (*psai & 0x1000000) | |
272 | ; | |
273 | ||
274 | *psai = psaival; | |
275 | ||
276 | return 0; | |
277 | ||
278 | } | |
279 | ||
280 | int | |
281 | es7000_stop_cpu(int cpu) | |
282 | { | |
283 | int startup; | |
284 | ||
285 | if (psai == NULL) | |
286 | return -1; | |
287 | ||
288 | startup= (0x1000000 | cpu); | |
289 | ||
290 | while ((*psai & 0xff00ffff) != startup) | |
291 | ; | |
292 | ||
293 | startup = (*psai & 0xff0000) >> 16; | |
294 | *psai &= 0xffffff; | |
295 | ||
296 | return 0; | |
297 | ||
298 | } | |
299 | ||
300 | void __init | |
301 | es7000_sw_apic() | |
302 | { | |
303 | if (es7000_plat) { | |
304 | int mip_status; | |
305 | struct mip_reg es7000_mip_reg; | |
306 | ||
307 | printk("ES7000: Enabling APIC mode.\n"); | |
308 | memset(&es7000_mip_reg, 0, sizeof(struct mip_reg)); | |
309 | es7000_mip_reg.off_0 = MIP_SW_APIC; | |
310 | es7000_mip_reg.off_38 = (MIP_VALID); | |
311 | while ((mip_status = es7000_mip_write(&es7000_mip_reg)) != 0) | |
312 | printk("es7000_sw_apic: command failed, status = %x\n", | |
313 | mip_status); | |
314 | return; | |
315 | } | |
316 | } |