xref: /openbmc/linux/arch/parisc/kernel/setup.c (revision 6aa7de05)
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 #include <linux/sched.h>
40 #include <linux/sched/clock.h>
41 #include <linux/start_kernel.h>
42 
43 #include <asm/processor.h>
44 #include <asm/sections.h>
45 #include <asm/pdc.h>
46 #include <asm/led.h>
47 #include <asm/machdep.h>	/* for pa7300lc_init() proto */
48 #include <asm/pdc_chassis.h>
49 #include <asm/io.h>
50 #include <asm/setup.h>
51 #include <asm/unwind.h>
52 #include <asm/smp.h>
53 
54 static char __initdata command_line[COMMAND_LINE_SIZE];
55 
56 /* Intended for ccio/sba/cpu statistics under /proc/bus/{runway|gsc} */
57 struct proc_dir_entry * proc_runway_root __read_mostly = NULL;
58 struct proc_dir_entry * proc_gsc_root __read_mostly = NULL;
59 struct proc_dir_entry * proc_mckinley_root __read_mostly = NULL;
60 
61 #if !defined(CONFIG_PA20) && (defined(CONFIG_IOMMU_CCIO) || defined(CONFIG_IOMMU_SBA))
62 int parisc_bus_is_phys __read_mostly = 1;	/* Assume no IOMMU is present */
63 EXPORT_SYMBOL(parisc_bus_is_phys);
64 #endif
65 
66 void __init setup_cmdline(char **cmdline_p)
67 {
68 	extern unsigned int boot_args[];
69 
70 	/* Collect stuff passed in from the boot loader */
71 
72 	/* boot_args[0] is free-mem start, boot_args[1] is ptr to command line */
73 	if (boot_args[0] < 64) {
74 		/* called from hpux boot loader */
75 		boot_command_line[0] = '\0';
76 	} else {
77 		strlcpy(boot_command_line, (char *)__va(boot_args[1]),
78 			COMMAND_LINE_SIZE);
79 
80 #ifdef CONFIG_BLK_DEV_INITRD
81 		if (boot_args[2] != 0) /* did palo pass us a ramdisk? */
82 		{
83 		    initrd_start = (unsigned long)__va(boot_args[2]);
84 		    initrd_end = (unsigned long)__va(boot_args[3]);
85 		}
86 #endif
87 	}
88 
89 	strcpy(command_line, boot_command_line);
90 	*cmdline_p = command_line;
91 }
92 
93 #ifdef CONFIG_PA11
94 void __init dma_ops_init(void)
95 {
96 	switch (boot_cpu_data.cpu_type) {
97 	case pcx:
98 		/*
99 		 * We've got way too many dependencies on 1.1 semantics
100 		 * to support 1.0 boxes at this point.
101 		 */
102 		panic(	"PA-RISC Linux currently only supports machines that conform to\n"
103 			"the PA-RISC 1.1 or 2.0 architecture specification.\n");
104 
105 	case pcxs:
106 	case pcxt:
107 		hppa_dma_ops = &pcx_dma_ops;
108 		break;
109 	case pcxl2:
110 		pa7300lc_init();
111 	case pcxl: /* falls through */
112 		hppa_dma_ops = &pcxl_dma_ops;
113 		break;
114 	default:
115 		break;
116 	}
117 }
118 #endif
119 
120 extern void collect_boot_cpu_data(void);
121 
122 void __init setup_arch(char **cmdline_p)
123 {
124 #ifdef CONFIG_64BIT
125 	extern int parisc_narrow_firmware;
126 #endif
127 	unwind_init();
128 
129 	init_per_cpu(smp_processor_id());	/* Set Modes & Enable FP */
130 
131 #ifdef CONFIG_64BIT
132 	printk(KERN_INFO "The 64-bit Kernel has started...\n");
133 #else
134 	printk(KERN_INFO "The 32-bit Kernel has started...\n");
135 #endif
136 
137 	printk(KERN_INFO "Kernel default page size is %d KB. Huge pages ",
138 		(int)(PAGE_SIZE / 1024));
139 #ifdef CONFIG_HUGETLB_PAGE
140 	printk(KERN_CONT "enabled with %d MB physical and %d MB virtual size",
141 		 1 << (REAL_HPAGE_SHIFT - 20), 1 << (HPAGE_SHIFT - 20));
142 #else
143 	printk(KERN_CONT "disabled");
144 #endif
145 	printk(KERN_CONT ".\n");
146 
147 	/*
148 	 * Check if initial kernel page mappings are sufficient.
149 	 * panic early if not, else we may access kernel functions
150 	 * and variables which can't be reached.
151 	 */
152 	if (__pa((unsigned long) &_end) >= KERNEL_INITIAL_SIZE)
153 		panic("KERNEL_INITIAL_ORDER too small!");
154 
155 	pdc_console_init();
156 
157 #ifdef CONFIG_64BIT
158 	if(parisc_narrow_firmware) {
159 		printk(KERN_INFO "Kernel is using PDC in 32-bit mode.\n");
160 	}
161 #endif
162 	setup_pdc();
163 	setup_cmdline(cmdline_p);
164 	collect_boot_cpu_data();
165 	do_memory_inventory();  /* probe for physical memory */
166 	parisc_cache_init();
167 	paging_init();
168 
169 #ifdef CONFIG_CHASSIS_LCD_LED
170 	/* initialize the LCD/LED after boot_cpu_data is available ! */
171 	led_init();		/* LCD/LED initialization */
172 #endif
173 
174 #ifdef CONFIG_PA11
175 	dma_ops_init();
176 #endif
177 
178 #if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
179 	conswitchp = &dummy_con;	/* we use do_take_over_console() later ! */
180 #endif
181 
182 	clear_sched_clock_stable();
183 }
184 
185 /*
186  * Display CPU info for all CPUs.
187  * for parisc this is in processor.c
188  */
189 extern int show_cpuinfo (struct seq_file *m, void *v);
190 
191 static void *
192 c_start (struct seq_file *m, loff_t *pos)
193 {
194     	/* Looks like the caller will call repeatedly until we return
195 	 * 0, signaling EOF perhaps.  This could be used to sequence
196 	 * through CPUs for example.  Since we print all cpu info in our
197 	 * show_cpuinfo() disregarding 'pos' (which I assume is 'v' above)
198 	 * we only allow for one "position".  */
199 	return ((long)*pos < 1) ? (void *)1 : NULL;
200 }
201 
202 static void *
203 c_next (struct seq_file *m, void *v, loff_t *pos)
204 {
205 	++*pos;
206 	return c_start(m, pos);
207 }
208 
209 static void
210 c_stop (struct seq_file *m, void *v)
211 {
212 }
213 
214 const struct seq_operations cpuinfo_op = {
215 	.start	= c_start,
216 	.next	= c_next,
217 	.stop	= c_stop,
218 	.show	= show_cpuinfo
219 };
220 
221 static void __init parisc_proc_mkdir(void)
222 {
223 	/*
224 	** Can't call proc_mkdir() until after proc_root_init() has been
225 	** called by start_kernel(). In other words, this code can't
226 	** live in arch/.../setup.c because start_parisc() calls
227 	** start_kernel().
228 	*/
229 	switch (boot_cpu_data.cpu_type) {
230 	case pcxl:
231 	case pcxl2:
232 		if (NULL == proc_gsc_root)
233 		{
234 			proc_gsc_root = proc_mkdir("bus/gsc", NULL);
235 		}
236 		break;
237         case pcxt_:
238         case pcxu:
239         case pcxu_:
240         case pcxw:
241         case pcxw_:
242         case pcxw2:
243                 if (NULL == proc_runway_root)
244                 {
245                         proc_runway_root = proc_mkdir("bus/runway", NULL);
246                 }
247                 break;
248 	case mako:
249 	case mako2:
250                 if (NULL == proc_mckinley_root)
251                 {
252                         proc_mckinley_root = proc_mkdir("bus/mckinley", NULL);
253                 }
254                 break;
255 	default:
256 		/* FIXME: this was added to prevent the compiler
257 		 * complaining about missing pcx, pcxs and pcxt
258 		 * I'm assuming they have neither gsc nor runway */
259 		break;
260 	}
261 }
262 
263 static struct resource central_bus = {
264 	.name	= "Central Bus",
265 	.start	= F_EXTEND(0xfff80000),
266 	.end    = F_EXTEND(0xfffaffff),
267 	.flags	= IORESOURCE_MEM,
268 };
269 
270 static struct resource local_broadcast = {
271 	.name	= "Local Broadcast",
272 	.start	= F_EXTEND(0xfffb0000),
273 	.end	= F_EXTEND(0xfffdffff),
274 	.flags	= IORESOURCE_MEM,
275 };
276 
277 static struct resource global_broadcast = {
278 	.name	= "Global Broadcast",
279 	.start	= F_EXTEND(0xfffe0000),
280 	.end	= F_EXTEND(0xffffffff),
281 	.flags	= IORESOURCE_MEM,
282 };
283 
284 static int __init parisc_init_resources(void)
285 {
286 	int result;
287 
288 	result = request_resource(&iomem_resource, &central_bus);
289 	if (result < 0) {
290 		printk(KERN_ERR
291 		       "%s: failed to claim %s address space!\n",
292 		       __FILE__, central_bus.name);
293 		return result;
294 	}
295 
296 	result = request_resource(&iomem_resource, &local_broadcast);
297 	if (result < 0) {
298 		printk(KERN_ERR
299 		       "%s: failed to claim %saddress space!\n",
300 		       __FILE__, local_broadcast.name);
301 		return result;
302 	}
303 
304 	result = request_resource(&iomem_resource, &global_broadcast);
305 	if (result < 0) {
306 		printk(KERN_ERR
307 		       "%s: failed to claim %s address space!\n",
308 		       __FILE__, global_broadcast.name);
309 		return result;
310 	}
311 
312 	return 0;
313 }
314 
315 extern void gsc_init(void);
316 extern void processor_init(void);
317 extern void ccio_init(void);
318 extern void hppb_init(void);
319 extern void dino_init(void);
320 extern void iosapic_init(void);
321 extern void lba_init(void);
322 extern void sba_init(void);
323 extern void eisa_init(void);
324 
325 static int __init parisc_init(void)
326 {
327 	u32 osid = (OS_ID_LINUX << 16);
328 
329 	parisc_proc_mkdir();
330 	parisc_init_resources();
331 	do_device_inventory();                  /* probe for hardware */
332 
333 	parisc_pdc_chassis_init();
334 
335 	/* set up a new led state on systems shipped LED State panel */
336 	pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BSTART);
337 
338 	/* tell PDC we're Linux. Nevermind failure. */
339 	pdc_stable_write(0x40, &osid, sizeof(osid));
340 
341 	/* start with known state */
342 	flush_cache_all_local();
343 	flush_tlb_all_local(NULL);
344 
345 	processor_init();
346 #ifdef CONFIG_SMP
347 	pr_info("CPU(s): %d out of %d %s at %d.%06d MHz online\n",
348 		num_online_cpus(), num_present_cpus(),
349 #else
350 	pr_info("CPU(s): 1 x %s at %d.%06d MHz\n",
351 #endif
352 			boot_cpu_data.cpu_name,
353 			boot_cpu_data.cpu_hz / 1000000,
354 			boot_cpu_data.cpu_hz % 1000000	);
355 
356 	parisc_setup_cache_timing();
357 
358 	/* These are in a non-obvious order, will fix when we have an iotree */
359 #if defined(CONFIG_IOSAPIC)
360 	iosapic_init();
361 #endif
362 #if defined(CONFIG_IOMMU_SBA)
363 	sba_init();
364 #endif
365 #if defined(CONFIG_PCI_LBA)
366 	lba_init();
367 #endif
368 
369 	/* CCIO before any potential subdevices */
370 #if defined(CONFIG_IOMMU_CCIO)
371 	ccio_init();
372 #endif
373 
374 	/*
375 	 * Need to register Asp & Wax before the EISA adapters for the IRQ
376 	 * regions.  EISA must come before PCI to be sure it gets IRQ region
377 	 * 0.
378 	 */
379 #if defined(CONFIG_GSC_LASI) || defined(CONFIG_GSC_WAX)
380 	gsc_init();
381 #endif
382 #ifdef CONFIG_EISA
383 	eisa_init();
384 #endif
385 
386 #if defined(CONFIG_HPPB)
387 	hppb_init();
388 #endif
389 
390 #if defined(CONFIG_GSC_DINO)
391 	dino_init();
392 #endif
393 
394 #ifdef CONFIG_CHASSIS_LCD_LED
395 	register_led_regions();	/* register LED port info in procfs */
396 #endif
397 
398 	return 0;
399 }
400 arch_initcall(parisc_init);
401 
402 void __init start_parisc(void)
403 {
404 	extern void early_trap_init(void);
405 
406 	int ret, cpunum;
407 	struct pdc_coproc_cfg coproc_cfg;
408 
409 	cpunum = smp_processor_id();
410 
411 	set_firmware_width_unlocked();
412 
413 	ret = pdc_coproc_cfg_unlocked(&coproc_cfg);
414 	if (ret >= 0 && coproc_cfg.ccr_functional) {
415 		mtctl(coproc_cfg.ccr_functional, 10);
416 
417 		per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;
418 		per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model;
419 
420 		asm volatile ("fstd	%fr0,8(%sp)");
421 	} else {
422 		panic("must have an fpu to boot linux");
423 	}
424 
425 	early_trap_init(); /* initialize checksum of fault_vector */
426 
427 	start_kernel();
428 	// not reached
429 }
430