Merge branch 'x86-kaslr-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6-block.git] / arch / parisc / kernel / setup.c
CommitLineData
071327ec 1/*
1da177e4
LT
2 * Initial setup-routines for HP 9000 based hardware.
3 *
4 * Copyright (C) 1991, 1992, 1995 Linus Torvalds
5 * Modifications for PA-RISC (C) 1999 Helge Deller <deller@gmx.de>
6 * Modifications copyright 1999 SuSE GmbH (Philipp Rumpf)
7 * Modifications copyright 2000 Martin K. Petersen <mkp@mkp.net>
8 * Modifications copyright 2000 Philipp Rumpf <prumpf@tux.org>
9 * Modifications copyright 2001 Ryan Bradetich <rbradetich@uswest.net>
10 *
11 * Initial PA-RISC Version: 04-23-1999 by Helge Deller
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2, or (at your option)
16 * any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 *
27 */
28
1da177e4
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29#include <linux/kernel.h>
30#include <linux/initrd.h>
31#include <linux/init.h>
32#include <linux/console.h>
33#include <linux/seq_file.h>
34#define PCI_DEBUG
35#include <linux/pci.h>
36#undef PCI_DEBUG
37#include <linux/proc_fs.h>
a87df54e 38#include <linux/export.h>
1da177e4
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39
40#include <asm/processor.h>
41#include <asm/pdc.h>
42#include <asm/led.h>
43#include <asm/machdep.h> /* for pa7300lc_init() proto */
44#include <asm/pdc_chassis.h>
45#include <asm/io.h>
46#include <asm/setup.h>
f0514ae3 47#include <asm/unwind.h>
1da177e4 48
01da41b8 49static char __initdata command_line[COMMAND_LINE_SIZE];
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50
51/* Intended for ccio/sba/cpu statistics under /proc/bus/{runway|gsc} */
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52struct proc_dir_entry * proc_runway_root __read_mostly = NULL;
53struct proc_dir_entry * proc_gsc_root __read_mostly = NULL;
54struct proc_dir_entry * proc_mckinley_root __read_mostly = NULL;
1da177e4
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55
56#if !defined(CONFIG_PA20) && (defined(CONFIG_IOMMU_CCIO) || defined(CONFIG_IOMMU_SBA))
8039de10 57int parisc_bus_is_phys __read_mostly = 1; /* Assume no IOMMU is present */
1da177e4
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58EXPORT_SYMBOL(parisc_bus_is_phys);
59#endif
60
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61void __init setup_cmdline(char **cmdline_p)
62{
63 extern unsigned int boot_args[];
64
65 /* Collect stuff passed in from the boot loader */
66
67 /* boot_args[0] is free-mem start, boot_args[1] is ptr to command line */
68 if (boot_args[0] < 64) {
69 /* called from hpux boot loader */
668f9931 70 boot_command_line[0] = '\0';
1da177e4 71 } else {
ea99b1ad
CG
72 strlcpy(boot_command_line, (char *)__va(boot_args[1]),
73 COMMAND_LINE_SIZE);
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74
75#ifdef CONFIG_BLK_DEV_INITRD
76 if (boot_args[2] != 0) /* did palo pass us a ramdisk? */
77 {
78 initrd_start = (unsigned long)__va(boot_args[2]);
79 initrd_end = (unsigned long)__va(boot_args[3]);
80 }
81#endif
82 }
83
668f9931 84 strcpy(command_line, boot_command_line);
1da177e4
LT
85 *cmdline_p = command_line;
86}
87
88#ifdef CONFIG_PA11
89void __init dma_ops_init(void)
90{
91 switch (boot_cpu_data.cpu_type) {
92 case pcx:
93 /*
94 * We've got way too many dependencies on 1.1 semantics
95 * to support 1.0 boxes at this point.
96 */
97 panic( "PA-RISC Linux currently only supports machines that conform to\n"
98 "the PA-RISC 1.1 or 2.0 architecture specification.\n");
99
100 case pcxs:
101 case pcxt:
102 hppa_dma_ops = &pcx_dma_ops;
103 break;
104 case pcxl2:
105 pa7300lc_init();
106 case pcxl: /* falls through */
107 hppa_dma_ops = &pcxl_dma_ops;
108 break;
109 default:
110 break;
111 }
112}
113#endif
114
115extern int init_per_cpu(int cpuid);
116extern void collect_boot_cpu_data(void);
117
118void __init setup_arch(char **cmdline_p)
119{
a8f44e38 120#ifdef CONFIG_64BIT
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121 extern int parisc_narrow_firmware;
122#endif
f0514ae3 123 unwind_init();
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124
125 init_per_cpu(smp_processor_id()); /* Set Modes & Enable FP */
126
a8f44e38 127#ifdef CONFIG_64BIT
1da177e4
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128 printk(KERN_INFO "The 64-bit Kernel has started...\n");
129#else
130 printk(KERN_INFO "The 32-bit Kernel has started...\n");
131#endif
132
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133 printk(KERN_INFO "Default page size is %dKB.\n", (int)(PAGE_SIZE / 1024));
134
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135 pdc_console_init();
136
a8f44e38 137#ifdef CONFIG_64BIT
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138 if(parisc_narrow_firmware) {
139 printk(KERN_INFO "Kernel is using PDC in 32-bit mode.\n");
140 }
141#endif
142 setup_pdc();
143 setup_cmdline(cmdline_p);
144 collect_boot_cpu_data();
145 do_memory_inventory(); /* probe for physical memory */
146 parisc_cache_init();
147 paging_init();
148
149#ifdef CONFIG_CHASSIS_LCD_LED
150 /* initialize the LCD/LED after boot_cpu_data is available ! */
151 led_init(); /* LCD/LED initialization */
152#endif
153
154#ifdef CONFIG_PA11
155 dma_ops_init();
156#endif
157
158#if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
155957f5 159 conswitchp = &dummy_con; /* we use do_take_over_console() later ! */
1da177e4
LT
160#endif
161
162}
163
164/*
7022672e 165 * Display CPU info for all CPUs.
1da177e4
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166 * for parisc this is in processor.c
167 */
168extern int show_cpuinfo (struct seq_file *m, void *v);
169
170static void *
171c_start (struct seq_file *m, loff_t *pos)
172{
173 /* Looks like the caller will call repeatedly until we return
174 * 0, signaling EOF perhaps. This could be used to sequence
175 * through CPUs for example. Since we print all cpu info in our
176 * show_cpuinfo() disregarding 'pos' (which I assume is 'v' above)
177 * we only allow for one "position". */
178 return ((long)*pos < 1) ? (void *)1 : NULL;
179}
180
181static void *
182c_next (struct seq_file *m, void *v, loff_t *pos)
183{
184 ++*pos;
185 return c_start(m, pos);
186}
187
188static void
189c_stop (struct seq_file *m, void *v)
190{
191}
192
03a44825 193const struct seq_operations cpuinfo_op = {
1da177e4
LT
194 .start = c_start,
195 .next = c_next,
196 .stop = c_stop,
197 .show = show_cpuinfo
198};
199
200static void __init parisc_proc_mkdir(void)
201{
202 /*
203 ** Can't call proc_mkdir() until after proc_root_init() has been
204 ** called by start_kernel(). In other words, this code can't
205 ** live in arch/.../setup.c because start_parisc() calls
206 ** start_kernel().
207 */
208 switch (boot_cpu_data.cpu_type) {
209 case pcxl:
210 case pcxl2:
211 if (NULL == proc_gsc_root)
212 {
213 proc_gsc_root = proc_mkdir("bus/gsc", NULL);
214 }
215 break;
216 case pcxt_:
217 case pcxu:
218 case pcxu_:
219 case pcxw:
220 case pcxw_:
221 case pcxw2:
222 if (NULL == proc_runway_root)
223 {
224 proc_runway_root = proc_mkdir("bus/runway", NULL);
225 }
226 break;
227 case mako:
2cbd42db 228 case mako2:
1da177e4
LT
229 if (NULL == proc_mckinley_root)
230 {
231 proc_mckinley_root = proc_mkdir("bus/mckinley", NULL);
232 }
233 break;
234 default:
235 /* FIXME: this was added to prevent the compiler
236 * complaining about missing pcx, pcxs and pcxt
237 * I'm assuming they have neither gsc nor runway */
238 break;
239 }
240}
241
242static struct resource central_bus = {
243 .name = "Central Bus",
244 .start = F_EXTEND(0xfff80000),
245 .end = F_EXTEND(0xfffaffff),
246 .flags = IORESOURCE_MEM,
247};
248
249static struct resource local_broadcast = {
250 .name = "Local Broadcast",
251 .start = F_EXTEND(0xfffb0000),
252 .end = F_EXTEND(0xfffdffff),
253 .flags = IORESOURCE_MEM,
254};
255
256static struct resource global_broadcast = {
257 .name = "Global Broadcast",
258 .start = F_EXTEND(0xfffe0000),
259 .end = F_EXTEND(0xffffffff),
260 .flags = IORESOURCE_MEM,
261};
262
263static int __init parisc_init_resources(void)
264{
265 int result;
266
267 result = request_resource(&iomem_resource, &central_bus);
268 if (result < 0) {
269 printk(KERN_ERR
270 "%s: failed to claim %s address space!\n",
271 __FILE__, central_bus.name);
272 return result;
273 }
274
275 result = request_resource(&iomem_resource, &local_broadcast);
276 if (result < 0) {
277 printk(KERN_ERR
278 "%s: failed to claim %saddress space!\n",
279 __FILE__, local_broadcast.name);
280 return result;
281 }
282
283 result = request_resource(&iomem_resource, &global_broadcast);
284 if (result < 0) {
285 printk(KERN_ERR
286 "%s: failed to claim %s address space!\n",
287 __FILE__, global_broadcast.name);
288 return result;
289 }
290
291 return 0;
292}
293
294extern void gsc_init(void);
295extern void processor_init(void);
296extern void ccio_init(void);
297extern void hppb_init(void);
298extern void dino_init(void);
299extern void iosapic_init(void);
300extern void lba_init(void);
301extern void sba_init(void);
302extern void eisa_init(void);
303
304static int __init parisc_init(void)
305{
ec1fdc24 306 u32 osid = (OS_ID_LINUX << 16);
3f9edb53 307
1da177e4
LT
308 parisc_proc_mkdir();
309 parisc_init_resources();
310 do_device_inventory(); /* probe for hardware */
311
312 parisc_pdc_chassis_init();
313
314 /* set up a new led state on systems shipped LED State panel */
315 pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BSTART);
3f9edb53
TV
316
317 /* tell PDC we're Linux. Nevermind failure. */
318 pdc_stable_write(0x40, &osid, sizeof(osid));
1da177e4
LT
319
320 processor_init();
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HD
321#ifdef CONFIG_SMP
322 pr_info("CPU(s): %d out of %d %s at %d.%06d MHz online\n",
323 num_online_cpus(), num_present_cpus(),
324#else
325 pr_info("CPU(s): 1 x %s at %d.%06d MHz\n",
326#endif
1da177e4
LT
327 boot_cpu_data.cpu_name,
328 boot_cpu_data.cpu_hz / 1000000,
329 boot_cpu_data.cpu_hz % 1000000 );
330
331 parisc_setup_cache_timing();
332
333 /* These are in a non-obvious order, will fix when we have an iotree */
334#if defined(CONFIG_IOSAPIC)
335 iosapic_init();
336#endif
337#if defined(CONFIG_IOMMU_SBA)
338 sba_init();
339#endif
340#if defined(CONFIG_PCI_LBA)
341 lba_init();
342#endif
343
344 /* CCIO before any potential subdevices */
345#if defined(CONFIG_IOMMU_CCIO)
346 ccio_init();
347#endif
348
349 /*
350 * Need to register Asp & Wax before the EISA adapters for the IRQ
351 * regions. EISA must come before PCI to be sure it gets IRQ region
352 * 0.
353 */
354#if defined(CONFIG_GSC_LASI) || defined(CONFIG_GSC_WAX)
355 gsc_init();
356#endif
357#ifdef CONFIG_EISA
358 eisa_init();
359#endif
360
361#if defined(CONFIG_HPPB)
362 hppb_init();
363#endif
364
365#if defined(CONFIG_GSC_DINO)
366 dino_init();
367#endif
368
369#ifdef CONFIG_CHASSIS_LCD_LED
370 register_led_regions(); /* register LED port info in procfs */
371#endif
372
373 return 0;
374}
1da177e4
LT
375arch_initcall(parisc_init);
376
089d5528
KM
377void start_parisc(void)
378{
379 extern void start_kernel(void);
380
381 int ret, cpunum;
382 struct pdc_coproc_cfg coproc_cfg;
383
384 cpunum = smp_processor_id();
385
386 set_firmware_width_unlocked();
387
388 ret = pdc_coproc_cfg_unlocked(&coproc_cfg);
389 if (ret >= 0 && coproc_cfg.ccr_functional) {
390 mtctl(coproc_cfg.ccr_functional, 10);
391
ef017beb
HD
392 per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;
393 per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model;
089d5528
KM
394
395 asm volatile ("fstd %fr0,8(%sp)");
396 } else {
397 panic("must have an fpu to boot linux");
398 }
399
400 start_kernel();
401 // not reached
402}