2 * Initial setup-routines for HP 9000 based hardware.
4 * Copyright (C) 1991, 1992, 1995 Linus Torvalds
6 * Modifications copyright 1999 SuSE GmbH (Philipp Rumpf)
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>
42 #include <asm/processor.h>
43 #include <asm/sections.h>
46 #include <asm/machdep.h> /* for pa7300lc_init() proto */
47 #include <asm/pdc_chassis.h>
49 #include <asm/setup.h>
50 #include <asm/unwind.h>
52 static char __initdata command_line[COMMAND_LINE_SIZE];
54 /* Intended for ccio/sba/cpu statistics under /proc/bus/{runway|gsc} */
55 struct proc_dir_entry * proc_runway_root __read_mostly = NULL;
56 struct proc_dir_entry * proc_gsc_root __read_mostly = NULL;
57 struct proc_dir_entry * proc_mckinley_root __read_mostly = NULL;
59 #if !defined(CONFIG_PA20) && (defined(CONFIG_IOMMU_CCIO) || defined(CONFIG_IOMMU_SBA))
60 int parisc_bus_is_phys __read_mostly = 1; /* Assume no IOMMU is present */
61 EXPORT_SYMBOL(parisc_bus_is_phys);
64 void __init setup_cmdline(char **cmdline_p)
66 extern unsigned int boot_args[];
68 /* Collect stuff passed in from the boot loader */
70 /* boot_args[0] is free-mem start, boot_args[1] is ptr to command line */
71 if (boot_args[0] < 64) {
72 /* called from hpux boot loader */
73 boot_command_line[0] = '\0';
75 strlcpy(boot_command_line, (char *)__va(boot_args[1]),
78 #ifdef CONFIG_BLK_DEV_INITRD
79 if (boot_args[2] != 0) /* did palo pass us a ramdisk? */
81 initrd_start = (unsigned long)__va(boot_args[2]);
82 initrd_end = (unsigned long)__va(boot_args[3]);
87 strcpy(command_line, boot_command_line);
88 *cmdline_p = command_line;
92 void __init dma_ops_init(void)
94 switch (boot_cpu_data.cpu_type) {
97 * We've got way too many dependencies on 1.1 semantics
98 * to support 1.0 boxes at this point.
100 panic( "PA-RISC Linux currently only supports machines that conform to\n"
101 "the PA-RISC 1.1 or 2.0 architecture specification.\n");
105 hppa_dma_ops = &pcx_dma_ops;
109 case pcxl: /* falls through */
110 hppa_dma_ops = &pcxl_dma_ops;
118 extern int init_per_cpu(int cpuid);
119 extern void collect_boot_cpu_data(void);
121 void __init setup_arch(char **cmdline_p)
124 extern int parisc_narrow_firmware;
128 init_per_cpu(smp_processor_id()); /* Set Modes & Enable FP */
131 printk(KERN_INFO "The 64-bit Kernel has started...\n");
133 printk(KERN_INFO "The 32-bit Kernel has started...\n");
136 printk(KERN_INFO "Kernel default page size is %d KB. Huge pages ",
137 (int)(PAGE_SIZE / 1024));
138 #ifdef CONFIG_HUGETLB_PAGE
139 printk(KERN_CONT "enabled with %d MB physical and %d MB virtual size",
140 1 << (REAL_HPAGE_SHIFT - 20), 1 << (HPAGE_SHIFT - 20));
142 printk(KERN_CONT "disabled");
144 printk(KERN_CONT ".\n");
147 * Check if initial kernel page mappings are sufficient.
148 * panic early if not, else we may access kernel functions
149 * and variables which can't be reached.
151 if (__pa((unsigned long) &_end) >= KERNEL_INITIAL_SIZE)
152 panic("KERNEL_INITIAL_ORDER too small!");
157 if(parisc_narrow_firmware) {
158 printk(KERN_INFO "Kernel is using PDC in 32-bit mode.\n");
162 setup_cmdline(cmdline_p);
163 collect_boot_cpu_data();
164 do_memory_inventory(); /* probe for physical memory */
168 #ifdef CONFIG_CHASSIS_LCD_LED
169 /* initialize the LCD/LED after boot_cpu_data is available ! */
170 led_init(); /* LCD/LED initialization */
177 #if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
178 conswitchp = &dummy_con; /* we use do_take_over_console() later ! */
181 clear_sched_clock_stable();
185 * Display CPU info for all CPUs.
186 * for parisc this is in processor.c
188 extern int show_cpuinfo (struct seq_file *m, void *v);
191 c_start (struct seq_file *m, loff_t *pos)
193 /* Looks like the caller will call repeatedly until we return
194 * 0, signaling EOF perhaps. This could be used to sequence
195 * through CPUs for example. Since we print all cpu info in our
196 * show_cpuinfo() disregarding 'pos' (which I assume is 'v' above)
197 * we only allow for one "position". */
198 return ((long)*pos < 1) ? (void *)1 : NULL;
202 c_next (struct seq_file *m, void *v, loff_t *pos)
205 return c_start(m, pos);
209 c_stop (struct seq_file *m, void *v)
213 const struct seq_operations cpuinfo_op = {
220 static void __init parisc_proc_mkdir(void)
223 ** Can't call proc_mkdir() until after proc_root_init() has been
224 ** called by start_kernel(). In other words, this code can't
225 ** live in arch/.../setup.c because start_parisc() calls
228 switch (boot_cpu_data.cpu_type) {
231 if (NULL == proc_gsc_root)
233 proc_gsc_root = proc_mkdir("bus/gsc", NULL);
242 if (NULL == proc_runway_root)
244 proc_runway_root = proc_mkdir("bus/runway", NULL);
249 if (NULL == proc_mckinley_root)
251 proc_mckinley_root = proc_mkdir("bus/mckinley", NULL);
255 /* FIXME: this was added to prevent the compiler
256 * complaining about missing pcx, pcxs and pcxt
257 * I'm assuming they have neither gsc nor runway */
262 static struct resource central_bus = {
263 .name = "Central Bus",
264 .start = F_EXTEND(0xfff80000),
265 .end = F_EXTEND(0xfffaffff),
266 .flags = IORESOURCE_MEM,
269 static struct resource local_broadcast = {
270 .name = "Local Broadcast",
271 .start = F_EXTEND(0xfffb0000),
272 .end = F_EXTEND(0xfffdffff),
273 .flags = IORESOURCE_MEM,
276 static struct resource global_broadcast = {
277 .name = "Global Broadcast",
278 .start = F_EXTEND(0xfffe0000),
279 .end = F_EXTEND(0xffffffff),
280 .flags = IORESOURCE_MEM,
283 static int __init parisc_init_resources(void)
287 result = request_resource(&iomem_resource, ¢ral_bus);
290 "%s: failed to claim %s address space!\n",
291 __FILE__, central_bus.name);
295 result = request_resource(&iomem_resource, &local_broadcast);
298 "%s: failed to claim %saddress space!\n",
299 __FILE__, local_broadcast.name);
303 result = request_resource(&iomem_resource, &global_broadcast);
306 "%s: failed to claim %s address space!\n",
307 __FILE__, global_broadcast.name);
314 extern void gsc_init(void);
315 extern void processor_init(void);
316 extern void ccio_init(void);
317 extern void hppb_init(void);
318 extern void dino_init(void);
319 extern void iosapic_init(void);
320 extern void lba_init(void);
321 extern void sba_init(void);
322 extern void eisa_init(void);
324 static int __init parisc_init(void)
326 u32 osid = (OS_ID_LINUX << 16);
329 parisc_init_resources();
330 do_device_inventory(); /* probe for hardware */
332 parisc_pdc_chassis_init();
334 /* set up a new led state on systems shipped LED State panel */
335 pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BSTART);
337 /* tell PDC we're Linux. Nevermind failure. */
338 pdc_stable_write(0x40, &osid, sizeof(osid));
340 /* start with known state */
341 flush_cache_all_local();
342 flush_tlb_all_local(NULL);
346 pr_info("CPU(s): %d out of %d %s at %d.%06d MHz online\n",
347 num_online_cpus(), num_present_cpus(),
349 pr_info("CPU(s): 1 x %s at %d.%06d MHz\n",
351 boot_cpu_data.cpu_name,
352 boot_cpu_data.cpu_hz / 1000000,
353 boot_cpu_data.cpu_hz % 1000000 );
355 parisc_setup_cache_timing();
357 /* These are in a non-obvious order, will fix when we have an iotree */
358 #if defined(CONFIG_IOSAPIC)
361 #if defined(CONFIG_IOMMU_SBA)
364 #if defined(CONFIG_PCI_LBA)
368 /* CCIO before any potential subdevices */
369 #if defined(CONFIG_IOMMU_CCIO)
374 * Need to register Asp & Wax before the EISA adapters for the IRQ
375 * regions. EISA must come before PCI to be sure it gets IRQ region
378 #if defined(CONFIG_GSC_LASI) || defined(CONFIG_GSC_WAX)
385 #if defined(CONFIG_HPPB)
389 #if defined(CONFIG_GSC_DINO)
393 #ifdef CONFIG_CHASSIS_LCD_LED
394 register_led_regions(); /* register LED port info in procfs */
399 arch_initcall(parisc_init);
401 void start_parisc(void)
403 extern void start_kernel(void);
404 extern void early_trap_init(void);
407 struct pdc_coproc_cfg coproc_cfg;
409 cpunum = smp_processor_id();
411 set_firmware_width_unlocked();
413 ret = pdc_coproc_cfg_unlocked(&coproc_cfg);
414 if (ret >= 0 && coproc_cfg.ccr_functional) {
415 mtctl(coproc_cfg.ccr_functional, 10);
417 per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;
418 per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model;
420 asm volatile ("fstd %fr0,8(%sp)");
422 panic("must have an fpu to boot linux");
425 early_trap_init(); /* initialize checksum of fault_vector */