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/arch/parisc/kernel/setup.c

https://github.com/aicjofs/android_kernel_lge_v500_20d_f2fs
C | 395 lines | 272 code | 59 blank | 64 comment | 23 complexity | a8f71c7a5bc622db694d394486e0277d MD5 | raw file
  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
 49static char __initdata command_line[COMMAND_LINE_SIZE];
 50
 51/* Intended for ccio/sba/cpu statistics under /proc/bus/{runway|gsc} */
 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;
 55
 56#if !defined(CONFIG_PA20) && (defined(CONFIG_IOMMU_CCIO) || defined(CONFIG_IOMMU_SBA))
 57int parisc_bus_is_phys __read_mostly = 1;	/* Assume no IOMMU is present */
 58EXPORT_SYMBOL(parisc_bus_is_phys);
 59#endif
 60
 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 */
 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
 88void __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
114extern int init_per_cpu(int cpuid);
115extern void collect_boot_cpu_data(void);
116
117void __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 */
165extern int show_cpuinfo (struct seq_file *m, void *v);
166
167static void *
168c_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
178static void *
179c_next (struct seq_file *m, void *v, loff_t *pos)
180{
181	++*pos;
182	return c_start(m, pos);
183}
184
185static void
186c_stop (struct seq_file *m, void *v)
187{
188}
189
190const struct seq_operations cpuinfo_op = {
191	.start	= c_start,
192	.next	= c_next,
193	.stop	= c_stop,
194	.show	= show_cpuinfo
195};
196
197static 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
239static struct resource central_bus = {
240	.name	= "Central Bus",
241	.start	= F_EXTEND(0xfff80000),
242	.end    = F_EXTEND(0xfffaffff),
243	.flags	= IORESOURCE_MEM,
244};
245
246static struct resource local_broadcast = {
247	.name	= "Local Broadcast",
248	.start	= F_EXTEND(0xfffb0000),
249	.end	= F_EXTEND(0xfffdffff),
250	.flags	= IORESOURCE_MEM,
251};
252
253static struct resource global_broadcast = {
254	.name	= "Global Broadcast",
255	.start	= F_EXTEND(0xfffe0000),
256	.end	= F_EXTEND(0xffffffff),
257	.flags	= IORESOURCE_MEM,
258};
259
260static int __init parisc_init_resources(void)
261{
262	int result;
263
264	result = request_resource(&iomem_resource, &central_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
291extern void gsc_init(void);
292extern void processor_init(void);
293extern void ccio_init(void);
294extern void hppb_init(void);
295extern void dino_init(void);
296extern void iosapic_init(void);
297extern void lba_init(void);
298extern void sba_init(void);
299extern void eisa_init(void);
300
301static 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}
368arch_initcall(parisc_init);
369
370void 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}