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 #include <linux/export.h>
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>
47 #include <asm/unwind.h>
48
49 static char __initdata command_line[COMMAND_LINE_SIZE];
50
51 /* Intended for ccio/sba/cpu statistics under /proc/bus/{runway|gsc} */
52 struct proc_dir_entry * proc_runway_root __read_mostly = NULL;
53 struct proc_dir_entry * proc_gsc_root __read_mostly = NULL;
54 struct proc_dir_entry * proc_mckinley_root __read_mostly = NULL;
55
56 #if !defined(CONFIG_PA20) && (defined(CONFIG_IOMMU_CCIO) || defined(CONFIG_IOMMU_SBA))
57 int parisc_bus_is_phys __read_mostly = 1; /* Assume no IOMMU is present */
58 EXPORT_SYMBOL(parisc_bus_is_phys);
59 #endif
60
setup_cmdline(char ** cmdline_p)61 void __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 */
70 boot_command_line[0] = '\0';
71 } else {
72 strcpy(boot_command_line, (char *)__va(boot_args[1]));
73
74 #ifdef CONFIG_BLK_DEV_INITRD
75 if (boot_args[2] != 0) /* did palo pass us a ramdisk? */
76 {
77 initrd_start = (unsigned long)__va(boot_args[2]);
78 initrd_end = (unsigned long)__va(boot_args[3]);
79 }
80 #endif
81 }
82
83 strcpy(command_line, boot_command_line);
84 *cmdline_p = command_line;
85 }
86
87 #ifdef CONFIG_PA11
dma_ops_init(void)88 void __init dma_ops_init(void)
89 {
90 switch (boot_cpu_data.cpu_type) {
91 case pcx:
92 /*
93 * We've got way too many dependencies on 1.1 semantics
94 * to support 1.0 boxes at this point.
95 */
96 panic( "PA-RISC Linux currently only supports machines that conform to\n"
97 "the PA-RISC 1.1 or 2.0 architecture specification.\n");
98
99 case pcxs:
100 case pcxt:
101 hppa_dma_ops = &pcx_dma_ops;
102 break;
103 case pcxl2:
104 pa7300lc_init();
105 case pcxl: /* falls through */
106 hppa_dma_ops = &pcxl_dma_ops;
107 break;
108 default:
109 break;
110 }
111 }
112 #endif
113
114 extern int init_per_cpu(int cpuid);
115 extern void collect_boot_cpu_data(void);
116
setup_arch(char ** cmdline_p)117 void __init setup_arch(char **cmdline_p)
118 {
119 #ifdef CONFIG_64BIT
120 extern int parisc_narrow_firmware;
121 #endif
122 unwind_init();
123
124 init_per_cpu(smp_processor_id()); /* Set Modes & Enable FP */
125
126 #ifdef CONFIG_64BIT
127 printk(KERN_INFO "The 64-bit Kernel has started...\n");
128 #else
129 printk(KERN_INFO "The 32-bit Kernel has started...\n");
130 #endif
131
132 pdc_console_init();
133
134 #ifdef CONFIG_64BIT
135 if(parisc_narrow_firmware) {
136 printk(KERN_INFO "Kernel is using PDC in 32-bit mode.\n");
137 }
138 #endif
139 setup_pdc();
140 setup_cmdline(cmdline_p);
141 collect_boot_cpu_data();
142 do_memory_inventory(); /* probe for physical memory */
143 parisc_cache_init();
144 paging_init();
145
146 #ifdef CONFIG_CHASSIS_LCD_LED
147 /* initialize the LCD/LED after boot_cpu_data is available ! */
148 led_init(); /* LCD/LED initialization */
149 #endif
150
151 #ifdef CONFIG_PA11
152 dma_ops_init();
153 #endif
154
155 #if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
156 conswitchp = &dummy_con; /* we use take_over_console() later ! */
157 #endif
158
159 }
160
161 /*
162 * Display CPU info for all CPUs.
163 * for parisc this is in processor.c
164 */
165 extern int show_cpuinfo (struct seq_file *m, void *v);
166
167 static void *
c_start(struct seq_file * m,loff_t * pos)168 c_start (struct seq_file *m, loff_t *pos)
169 {
170 /* Looks like the caller will call repeatedly until we return
171 * 0, signaling EOF perhaps. This could be used to sequence
172 * through CPUs for example. Since we print all cpu info in our
173 * show_cpuinfo() disregarding 'pos' (which I assume is 'v' above)
174 * we only allow for one "position". */
175 return ((long)*pos < 1) ? (void *)1 : NULL;
176 }
177
178 static void *
c_next(struct seq_file * m,void * v,loff_t * pos)179 c_next (struct seq_file *m, void *v, loff_t *pos)
180 {
181 ++*pos;
182 return c_start(m, pos);
183 }
184
185 static void
c_stop(struct seq_file * m,void * v)186 c_stop (struct seq_file *m, void *v)
187 {
188 }
189
190 const struct seq_operations cpuinfo_op = {
191 .start = c_start,
192 .next = c_next,
193 .stop = c_stop,
194 .show = show_cpuinfo
195 };
196
parisc_proc_mkdir(void)197 static void __init parisc_proc_mkdir(void)
198 {
199 /*
200 ** Can't call proc_mkdir() until after proc_root_init() has been
201 ** called by start_kernel(). In other words, this code can't
202 ** live in arch/.../setup.c because start_parisc() calls
203 ** start_kernel().
204 */
205 switch (boot_cpu_data.cpu_type) {
206 case pcxl:
207 case pcxl2:
208 if (NULL == proc_gsc_root)
209 {
210 proc_gsc_root = proc_mkdir("bus/gsc", NULL);
211 }
212 break;
213 case pcxt_:
214 case pcxu:
215 case pcxu_:
216 case pcxw:
217 case pcxw_:
218 case pcxw2:
219 if (NULL == proc_runway_root)
220 {
221 proc_runway_root = proc_mkdir("bus/runway", NULL);
222 }
223 break;
224 case mako:
225 case mako2:
226 if (NULL == proc_mckinley_root)
227 {
228 proc_mckinley_root = proc_mkdir("bus/mckinley", NULL);
229 }
230 break;
231 default:
232 /* FIXME: this was added to prevent the compiler
233 * complaining about missing pcx, pcxs and pcxt
234 * I'm assuming they have neither gsc nor runway */
235 break;
236 }
237 }
238
239 static struct resource central_bus = {
240 .name = "Central Bus",
241 .start = F_EXTEND(0xfff80000),
242 .end = F_EXTEND(0xfffaffff),
243 .flags = IORESOURCE_MEM,
244 };
245
246 static struct resource local_broadcast = {
247 .name = "Local Broadcast",
248 .start = F_EXTEND(0xfffb0000),
249 .end = F_EXTEND(0xfffdffff),
250 .flags = IORESOURCE_MEM,
251 };
252
253 static struct resource global_broadcast = {
254 .name = "Global Broadcast",
255 .start = F_EXTEND(0xfffe0000),
256 .end = F_EXTEND(0xffffffff),
257 .flags = IORESOURCE_MEM,
258 };
259
parisc_init_resources(void)260 static int __init parisc_init_resources(void)
261 {
262 int result;
263
264 result = request_resource(&iomem_resource, ¢ral_bus);
265 if (result < 0) {
266 printk(KERN_ERR
267 "%s: failed to claim %s address space!\n",
268 __FILE__, central_bus.name);
269 return result;
270 }
271
272 result = request_resource(&iomem_resource, &local_broadcast);
273 if (result < 0) {
274 printk(KERN_ERR
275 "%s: failed to claim %saddress space!\n",
276 __FILE__, local_broadcast.name);
277 return result;
278 }
279
280 result = request_resource(&iomem_resource, &global_broadcast);
281 if (result < 0) {
282 printk(KERN_ERR
283 "%s: failed to claim %s address space!\n",
284 __FILE__, global_broadcast.name);
285 return result;
286 }
287
288 return 0;
289 }
290
291 extern void gsc_init(void);
292 extern void processor_init(void);
293 extern void ccio_init(void);
294 extern void hppb_init(void);
295 extern void dino_init(void);
296 extern void iosapic_init(void);
297 extern void lba_init(void);
298 extern void sba_init(void);
299 extern void eisa_init(void);
300
parisc_init(void)301 static int __init parisc_init(void)
302 {
303 u32 osid = (OS_ID_LINUX << 16);
304
305 parisc_proc_mkdir();
306 parisc_init_resources();
307 do_device_inventory(); /* probe for hardware */
308
309 parisc_pdc_chassis_init();
310
311 /* set up a new led state on systems shipped LED State panel */
312 pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BSTART);
313
314 /* tell PDC we're Linux. Nevermind failure. */
315 pdc_stable_write(0x40, &osid, sizeof(osid));
316
317 processor_init();
318 printk(KERN_INFO "CPU(s): %d x %s at %d.%06d MHz\n",
319 num_present_cpus(),
320 boot_cpu_data.cpu_name,
321 boot_cpu_data.cpu_hz / 1000000,
322 boot_cpu_data.cpu_hz % 1000000 );
323
324 parisc_setup_cache_timing();
325
326 /* These are in a non-obvious order, will fix when we have an iotree */
327 #if defined(CONFIG_IOSAPIC)
328 iosapic_init();
329 #endif
330 #if defined(CONFIG_IOMMU_SBA)
331 sba_init();
332 #endif
333 #if defined(CONFIG_PCI_LBA)
334 lba_init();
335 #endif
336
337 /* CCIO before any potential subdevices */
338 #if defined(CONFIG_IOMMU_CCIO)
339 ccio_init();
340 #endif
341
342 /*
343 * Need to register Asp & Wax before the EISA adapters for the IRQ
344 * regions. EISA must come before PCI to be sure it gets IRQ region
345 * 0.
346 */
347 #if defined(CONFIG_GSC_LASI) || defined(CONFIG_GSC_WAX)
348 gsc_init();
349 #endif
350 #ifdef CONFIG_EISA
351 eisa_init();
352 #endif
353
354 #if defined(CONFIG_HPPB)
355 hppb_init();
356 #endif
357
358 #if defined(CONFIG_GSC_DINO)
359 dino_init();
360 #endif
361
362 #ifdef CONFIG_CHASSIS_LCD_LED
363 register_led_regions(); /* register LED port info in procfs */
364 #endif
365
366 return 0;
367 }
368 arch_initcall(parisc_init);
369
start_parisc(void)370 void start_parisc(void)
371 {
372 extern void start_kernel(void);
373
374 int ret, cpunum;
375 struct pdc_coproc_cfg coproc_cfg;
376
377 cpunum = smp_processor_id();
378
379 set_firmware_width_unlocked();
380
381 ret = pdc_coproc_cfg_unlocked(&coproc_cfg);
382 if (ret >= 0 && coproc_cfg.ccr_functional) {
383 mtctl(coproc_cfg.ccr_functional, 10);
384
385 per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;
386 per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model;
387
388 asm volatile ("fstd %fr0,8(%sp)");
389 } else {
390 panic("must have an fpu to boot linux");
391 }
392
393 start_kernel();
394 // not reached
395 }
396