2 * Initial setup-routines for HP 9000 based hardware.
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>
11 * Initial PA-RISC Version: 04-23-1999 by Helge Deller
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)
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.
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.
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>
35 #include <linux/pci.h>
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>
43 #include <asm/cacheflush.h>
44 #include <asm/processor.h>
45 #include <asm/sections.h>
48 #include <asm/machdep.h> /* for pa7300lc_init() proto */
49 #include <asm/pdc_chassis.h>
51 #include <asm/setup.h>
52 #include <asm/unwind.h>
55 static char __initdata command_line[COMMAND_LINE_SIZE];
57 /* Intended for ccio/sba/cpu statistics under /proc/bus/{runway|gsc} */
58 struct proc_dir_entry * proc_runway_root __read_mostly = NULL;
59 struct proc_dir_entry * proc_gsc_root __read_mostly = NULL;
60 struct proc_dir_entry * proc_mckinley_root __read_mostly = NULL;
62 void __init setup_cmdline(char **cmdline_p)
64 extern unsigned int boot_args[];
66 /* Collect stuff passed in from the boot loader */
68 /* boot_args[0] is free-mem start, boot_args[1] is ptr to command line */
69 if (boot_args[0] < 64) {
70 /* called from hpux boot loader */
71 boot_command_line[0] = '\0';
73 strlcpy(boot_command_line, (char *)__va(boot_args[1]),
76 #ifdef CONFIG_BLK_DEV_INITRD
77 if (boot_args[2] != 0) /* did palo pass us a ramdisk? */
79 initrd_start = (unsigned long)__va(boot_args[2]);
80 initrd_end = (unsigned long)__va(boot_args[3]);
85 strcpy(command_line, boot_command_line);
86 *cmdline_p = command_line;
90 void __init dma_ops_init(void)
92 switch (boot_cpu_data.cpu_type) {
95 * We've got way too many dependencies on 1.1 semantics
96 * to support 1.0 boxes at this point.
98 panic( "PA-RISC Linux currently only supports machines that conform to\n"
99 "the PA-RISC 1.1 or 2.0 architecture specification.\n");
110 extern void collect_boot_cpu_data(void);
112 void __init setup_arch(char **cmdline_p)
115 extern int parisc_narrow_firmware;
119 init_per_cpu(smp_processor_id()); /* Set Modes & Enable FP */
122 printk(KERN_INFO "The 64-bit Kernel has started...\n");
124 printk(KERN_INFO "The 32-bit Kernel has started...\n");
127 printk(KERN_INFO "Kernel default page size is %d KB. Huge pages ",
128 (int)(PAGE_SIZE / 1024));
129 #ifdef CONFIG_HUGETLB_PAGE
130 printk(KERN_CONT "enabled with %d MB physical and %d MB virtual size",
131 1 << (REAL_HPAGE_SHIFT - 20), 1 << (HPAGE_SHIFT - 20));
133 printk(KERN_CONT "disabled");
135 printk(KERN_CONT ".\n");
138 * Check if initial kernel page mappings are sufficient.
139 * panic early if not, else we may access kernel functions
140 * and variables which can't be reached.
142 if (__pa((unsigned long) &_end) >= KERNEL_INITIAL_SIZE)
143 panic("KERNEL_INITIAL_ORDER too small!");
148 if(parisc_narrow_firmware) {
149 printk(KERN_INFO "Kernel is using PDC in 32-bit mode.\n");
153 setup_cmdline(cmdline_p);
154 collect_boot_cpu_data();
155 do_memory_inventory(); /* probe for physical memory */
159 #ifdef CONFIG_CHASSIS_LCD_LED
160 /* initialize the LCD/LED after boot_cpu_data is available ! */
161 led_init(); /* LCD/LED initialization */
168 #if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
169 conswitchp = &dummy_con; /* we use do_take_over_console() later ! */
172 clear_sched_clock_stable();
176 * Display CPU info for all CPUs.
177 * for parisc this is in processor.c
179 extern int show_cpuinfo (struct seq_file *m, void *v);
182 c_start (struct seq_file *m, loff_t *pos)
184 /* Looks like the caller will call repeatedly until we return
185 * 0, signaling EOF perhaps. This could be used to sequence
186 * through CPUs for example. Since we print all cpu info in our
187 * show_cpuinfo() disregarding 'pos' (which I assume is 'v' above)
188 * we only allow for one "position". */
189 return ((long)*pos < 1) ? (void *)1 : NULL;
193 c_next (struct seq_file *m, void *v, loff_t *pos)
196 return c_start(m, pos);
200 c_stop (struct seq_file *m, void *v)
204 const struct seq_operations cpuinfo_op = {
211 static void __init parisc_proc_mkdir(void)
214 ** Can't call proc_mkdir() until after proc_root_init() has been
215 ** called by start_kernel(). In other words, this code can't
216 ** live in arch/.../setup.c because start_parisc() calls
219 switch (boot_cpu_data.cpu_type) {
222 if (NULL == proc_gsc_root)
224 proc_gsc_root = proc_mkdir("bus/gsc", NULL);
233 if (NULL == proc_runway_root)
235 proc_runway_root = proc_mkdir("bus/runway", NULL);
240 if (NULL == proc_mckinley_root)
242 proc_mckinley_root = proc_mkdir("bus/mckinley", NULL);
246 /* FIXME: this was added to prevent the compiler
247 * complaining about missing pcx, pcxs and pcxt
248 * I'm assuming they have neither gsc nor runway */
253 static struct resource central_bus = {
254 .name = "Central Bus",
255 .start = F_EXTEND(0xfff80000),
256 .end = F_EXTEND(0xfffaffff),
257 .flags = IORESOURCE_MEM,
260 static struct resource local_broadcast = {
261 .name = "Local Broadcast",
262 .start = F_EXTEND(0xfffb0000),
263 .end = F_EXTEND(0xfffdffff),
264 .flags = IORESOURCE_MEM,
267 static struct resource global_broadcast = {
268 .name = "Global Broadcast",
269 .start = F_EXTEND(0xfffe0000),
270 .end = F_EXTEND(0xffffffff),
271 .flags = IORESOURCE_MEM,
274 static int __init parisc_init_resources(void)
278 result = request_resource(&iomem_resource, ¢ral_bus);
281 "%s: failed to claim %s address space!\n",
282 __FILE__, central_bus.name);
286 result = request_resource(&iomem_resource, &local_broadcast);
289 "%s: failed to claim %saddress space!\n",
290 __FILE__, local_broadcast.name);
294 result = request_resource(&iomem_resource, &global_broadcast);
297 "%s: failed to claim %s address space!\n",
298 __FILE__, global_broadcast.name);
305 extern void gsc_init(void);
306 extern void processor_init(void);
307 extern void ccio_init(void);
308 extern void hppb_init(void);
309 extern void dino_init(void);
310 extern void iosapic_init(void);
311 extern void lba_init(void);
312 extern void sba_init(void);
313 extern void eisa_init(void);
315 static int __init parisc_init(void)
317 u32 osid = (OS_ID_LINUX << 16);
320 parisc_init_resources();
321 do_device_inventory(); /* probe for hardware */
323 parisc_pdc_chassis_init();
325 /* set up a new led state on systems shipped LED State panel */
326 pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BSTART);
328 /* tell PDC we're Linux. Nevermind failure. */
329 pdc_stable_write(0x40, &osid, sizeof(osid));
331 /* start with known state */
332 flush_cache_all_local();
333 flush_tlb_all_local(NULL);
337 pr_info("CPU(s): %d out of %d %s at %d.%06d MHz online\n",
338 num_online_cpus(), num_present_cpus(),
340 pr_info("CPU(s): 1 x %s at %d.%06d MHz\n",
342 boot_cpu_data.cpu_name,
343 boot_cpu_data.cpu_hz / 1000000,
344 boot_cpu_data.cpu_hz % 1000000 );
346 apply_alternatives_all();
347 parisc_setup_cache_timing();
349 /* These are in a non-obvious order, will fix when we have an iotree */
350 #if defined(CONFIG_IOSAPIC)
353 #if defined(CONFIG_IOMMU_SBA)
356 #if defined(CONFIG_PCI_LBA)
360 /* CCIO before any potential subdevices */
361 #if defined(CONFIG_IOMMU_CCIO)
366 * Need to register Asp & Wax before the EISA adapters for the IRQ
367 * regions. EISA must come before PCI to be sure it gets IRQ region
370 #if defined(CONFIG_GSC_LASI) || defined(CONFIG_GSC_WAX)
377 #if defined(CONFIG_HPPB)
381 #if defined(CONFIG_GSC_DINO)
385 #ifdef CONFIG_CHASSIS_LCD_LED
386 register_led_regions(); /* register LED port info in procfs */
391 arch_initcall(parisc_init);
393 void __init start_parisc(void)
395 extern void early_trap_init(void);
398 struct pdc_coproc_cfg coproc_cfg;
400 /* check QEMU/SeaBIOS marker in PAGE0 */
401 running_on_qemu = (memcmp(&PAGE0->pad0, "SeaBIOS", 8) == 0);
403 cpunum = smp_processor_id();
407 set_firmware_width_unlocked();
409 ret = pdc_coproc_cfg_unlocked(&coproc_cfg);
410 if (ret >= 0 && coproc_cfg.ccr_functional) {
411 mtctl(coproc_cfg.ccr_functional, 10);
413 per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;
414 per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model;
416 asm volatile ("fstd %fr0,8(%sp)");
418 panic("must have an fpu to boot linux");
421 early_trap_init(); /* initialize checksum of fault_vector */