1 /*
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
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>
38
39 #include <asm/processor.h>
40 #include <asm/pdc.h>
41 #include <asm/led.h>
42 #include <asm/machdep.h> /* for pa7300lc_init() proto */
43 #include <asm/pdc_chassis.h>
44 #include <asm/io.h>
45 #include <asm/setup.h>
46 #include <asm/unwind.h>
47
48 static char __initdata command_line[COMMAND_LINE_SIZE];
49
50 /* Intended for ccio/sba/cpu statistics under /proc/bus/{runway|gsc} */
51 struct proc_dir_entry * proc_runway_root __read_mostly = NULL;
52 struct proc_dir_entry * proc_gsc_root __read_mostly = NULL;
53 struct proc_dir_entry * proc_mckinley_root __read_mostly = NULL;
54
55 #if !defined(CONFIG_PA20) && (defined(CONFIG_IOMMU_CCIO) || defined(CONFIG_IOMMU_SBA))
56 int parisc_bus_is_phys __read_mostly = 1; /* Assume no IOMMU is present */
57 EXPORT_SYMBOL(parisc_bus_is_phys);
58 #endif
59
setup_cmdline(char ** cmdline_p)60 void __init setup_cmdline(char **cmdline_p)
61 {
62 extern unsigned int boot_args[];
63
64 /* Collect stuff passed in from the boot loader */
65
66 /* boot_args[0] is free-mem start, boot_args[1] is ptr to command line */
67 if (boot_args[0] < 64) {
68 /* called from hpux boot loader */
69 boot_command_line[0] = '\0';
70 } else {
71 strcpy(boot_command_line, (char *)__va(boot_args[1]));
72
73 #ifdef CONFIG_BLK_DEV_INITRD
74 if (boot_args[2] != 0) /* did palo pass us a ramdisk? */
75 {
76 initrd_start = (unsigned long)__va(boot_args[2]);
77 initrd_end = (unsigned long)__va(boot_args[3]);
78 }
79 #endif
80 }
81
82 strcpy(command_line, boot_command_line);
83 *cmdline_p = command_line;
84 }
85
86 #ifdef CONFIG_PA11
dma_ops_init(void)87 void __init dma_ops_init(void)
88 {
89 switch (boot_cpu_data.cpu_type) {
90 case pcx:
91 /*
92 * We've got way too many dependencies on 1.1 semantics
93 * to support 1.0 boxes at this point.
94 */
95 panic( "PA-RISC Linux currently only supports machines that conform to\n"
96 "the PA-RISC 1.1 or 2.0 architecture specification.\n");
97
98 case pcxs:
99 case pcxt:
100 hppa_dma_ops = &pcx_dma_ops;
101 break;
102 case pcxl2:
103 pa7300lc_init();
104 case pcxl: /* falls through */
105 hppa_dma_ops = &pcxl_dma_ops;
106 break;
107 default:
108 break;
109 }
110 }
111 #endif
112
113 extern int init_per_cpu(int cpuid);
114 extern void collect_boot_cpu_data(void);
115
setup_arch(char ** cmdline_p)116 void __init setup_arch(char **cmdline_p)
117 {
118 #ifdef CONFIG_64BIT
119 extern int parisc_narrow_firmware;
120 #endif
121 unwind_init();
122
123 init_per_cpu(smp_processor_id()); /* Set Modes & Enable FP */
124
125 #ifdef CONFIG_64BIT
126 printk(KERN_INFO "The 64-bit Kernel has started...\n");
127 #else
128 printk(KERN_INFO "The 32-bit Kernel has started...\n");
129 #endif
130
131 pdc_console_init();
132
133 #ifdef CONFIG_64BIT
134 if(parisc_narrow_firmware) {
135 printk(KERN_INFO "Kernel is using PDC in 32-bit mode.\n");
136 }
137 #endif
138 setup_pdc();
139 setup_cmdline(cmdline_p);
140 collect_boot_cpu_data();
141 do_memory_inventory(); /* probe for physical memory */
142 parisc_cache_init();
143 paging_init();
144
145 #ifdef CONFIG_CHASSIS_LCD_LED
146 /* initialize the LCD/LED after boot_cpu_data is available ! */
147 led_init(); /* LCD/LED initialization */
148 #endif
149
150 #ifdef CONFIG_PA11
151 dma_ops_init();
152 #endif
153
154 #if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
155 conswitchp = &dummy_con; /* we use take_over_console() later ! */
156 #endif
157
158 }
159
160 /*
161 * Display CPU info for all CPUs.
162 * for parisc this is in processor.c
163 */
164 extern int show_cpuinfo (struct seq_file *m, void *v);
165
166 static void *
c_start(struct seq_file * m,loff_t * pos)167 c_start (struct seq_file *m, loff_t *pos)
168 {
169 /* Looks like the caller will call repeatedly until we return
170 * 0, signaling EOF perhaps. This could be used to sequence
171 * through CPUs for example. Since we print all cpu info in our
172 * show_cpuinfo() disregarding 'pos' (which I assume is 'v' above)
173 * we only allow for one "position". */
174 return ((long)*pos < 1) ? (void *)1 : NULL;
175 }
176
177 static void *
c_next(struct seq_file * m,void * v,loff_t * pos)178 c_next (struct seq_file *m, void *v, loff_t *pos)
179 {
180 ++*pos;
181 return c_start(m, pos);
182 }
183
184 static void
c_stop(struct seq_file * m,void * v)185 c_stop (struct seq_file *m, void *v)
186 {
187 }
188
189 const struct seq_operations cpuinfo_op = {
190 .start = c_start,
191 .next = c_next,
192 .stop = c_stop,
193 .show = show_cpuinfo
194 };
195
parisc_proc_mkdir(void)196 static void __init parisc_proc_mkdir(void)
197 {
198 /*
199 ** Can't call proc_mkdir() until after proc_root_init() has been
200 ** called by start_kernel(). In other words, this code can't
201 ** live in arch/.../setup.c because start_parisc() calls
202 ** start_kernel().
203 */
204 switch (boot_cpu_data.cpu_type) {
205 case pcxl:
206 case pcxl2:
207 if (NULL == proc_gsc_root)
208 {
209 proc_gsc_root = proc_mkdir("bus/gsc", NULL);
210 }
211 break;
212 case pcxt_:
213 case pcxu:
214 case pcxu_:
215 case pcxw:
216 case pcxw_:
217 case pcxw2:
218 if (NULL == proc_runway_root)
219 {
220 proc_runway_root = proc_mkdir("bus/runway", NULL);
221 }
222 break;
223 case mako:
224 case mako2:
225 if (NULL == proc_mckinley_root)
226 {
227 proc_mckinley_root = proc_mkdir("bus/mckinley", NULL);
228 }
229 break;
230 default:
231 /* FIXME: this was added to prevent the compiler
232 * complaining about missing pcx, pcxs and pcxt
233 * I'm assuming they have neither gsc nor runway */
234 break;
235 }
236 }
237
238 static struct resource central_bus = {
239 .name = "Central Bus",
240 .start = F_EXTEND(0xfff80000),
241 .end = F_EXTEND(0xfffaffff),
242 .flags = IORESOURCE_MEM,
243 };
244
245 static struct resource local_broadcast = {
246 .name = "Local Broadcast",
247 .start = F_EXTEND(0xfffb0000),
248 .end = F_EXTEND(0xfffdffff),
249 .flags = IORESOURCE_MEM,
250 };
251
252 static struct resource global_broadcast = {
253 .name = "Global Broadcast",
254 .start = F_EXTEND(0xfffe0000),
255 .end = F_EXTEND(0xffffffff),
256 .flags = IORESOURCE_MEM,
257 };
258
parisc_init_resources(void)259 static int __init parisc_init_resources(void)
260 {
261 int result;
262
263 result = request_resource(&iomem_resource, ¢ral_bus);
264 if (result < 0) {
265 printk(KERN_ERR
266 "%s: failed to claim %s address space!\n",
267 __FILE__, central_bus.name);
268 return result;
269 }
270
271 result = request_resource(&iomem_resource, &local_broadcast);
272 if (result < 0) {
273 printk(KERN_ERR
274 "%s: failed to claim %saddress space!\n",
275 __FILE__, local_broadcast.name);
276 return result;
277 }
278
279 result = request_resource(&iomem_resource, &global_broadcast);
280 if (result < 0) {
281 printk(KERN_ERR
282 "%s: failed to claim %s address space!\n",
283 __FILE__, global_broadcast.name);
284 return result;
285 }
286
287 return 0;
288 }
289
290 extern void gsc_init(void);
291 extern void processor_init(void);
292 extern void ccio_init(void);
293 extern void hppb_init(void);
294 extern void dino_init(void);
295 extern void iosapic_init(void);
296 extern void lba_init(void);
297 extern void sba_init(void);
298 extern void eisa_init(void);
299
parisc_init(void)300 static int __init parisc_init(void)
301 {
302 u32 osid = (OS_ID_LINUX << 16);
303
304 parisc_proc_mkdir();
305 parisc_init_resources();
306 do_device_inventory(); /* probe for hardware */
307
308 parisc_pdc_chassis_init();
309
310 /* set up a new led state on systems shipped LED State panel */
311 pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BSTART);
312
313 /* tell PDC we're Linux. Nevermind failure. */
314 pdc_stable_write(0x40, &osid, sizeof(osid));
315
316 processor_init();
317 printk(KERN_INFO "CPU(s): %d x %s at %d.%06d MHz\n",
318 num_present_cpus(),
319 boot_cpu_data.cpu_name,
320 boot_cpu_data.cpu_hz / 1000000,
321 boot_cpu_data.cpu_hz % 1000000 );
322
323 parisc_setup_cache_timing();
324
325 /* These are in a non-obvious order, will fix when we have an iotree */
326 #if defined(CONFIG_IOSAPIC)
327 iosapic_init();
328 #endif
329 #if defined(CONFIG_IOMMU_SBA)
330 sba_init();
331 #endif
332 #if defined(CONFIG_PCI_LBA)
333 lba_init();
334 #endif
335
336 /* CCIO before any potential subdevices */
337 #if defined(CONFIG_IOMMU_CCIO)
338 ccio_init();
339 #endif
340
341 /*
342 * Need to register Asp & Wax before the EISA adapters for the IRQ
343 * regions. EISA must come before PCI to be sure it gets IRQ region
344 * 0.
345 */
346 #if defined(CONFIG_GSC_LASI) || defined(CONFIG_GSC_WAX)
347 gsc_init();
348 #endif
349 #ifdef CONFIG_EISA
350 eisa_init();
351 #endif
352
353 #if defined(CONFIG_HPPB)
354 hppb_init();
355 #endif
356
357 #if defined(CONFIG_GSC_DINO)
358 dino_init();
359 #endif
360
361 #ifdef CONFIG_CHASSIS_LCD_LED
362 register_led_regions(); /* register LED port info in procfs */
363 #endif
364
365 return 0;
366 }
367 arch_initcall(parisc_init);
368
start_parisc(void)369 void start_parisc(void)
370 {
371 extern void start_kernel(void);
372
373 int ret, cpunum;
374 struct pdc_coproc_cfg coproc_cfg;
375
376 cpunum = smp_processor_id();
377
378 set_firmware_width_unlocked();
379
380 ret = pdc_coproc_cfg_unlocked(&coproc_cfg);
381 if (ret >= 0 && coproc_cfg.ccr_functional) {
382 mtctl(coproc_cfg.ccr_functional, 10);
383
384 per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;
385 per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model;
386
387 asm volatile ("fstd %fr0,8(%sp)");
388 } else {
389 panic("must have an fpu to boot linux");
390 }
391
392 start_kernel();
393 // not reached
394 }
395