1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Initial setup-routines for HP 9000 based hardware.
5 * Copyright (C) 1991, 1992, 1995 Linus Torvalds
6 * Modifications for PA-RISC (C) 1999 Helge Deller <deller@gmx.de>
7 * Modifications copyright 1999 SuSE GmbH (Philipp Rumpf)
8 * Modifications copyright 2000 Martin K. Petersen <mkp@mkp.net>
9 * Modifications copyright 2000 Philipp Rumpf <prumpf@tux.org>
10 * Modifications copyright 2001 Ryan Bradetich <rbradetich@uswest.net>
12 * Initial PA-RISC Version: 04-23-1999 by Helge Deller
15 #include <linux/kernel.h>
16 #include <linux/initrd.h>
17 #include <linux/init.h>
18 #include <linux/console.h>
19 #include <linux/seq_file.h>
21 #include <linux/pci.h>
23 #include <linux/proc_fs.h>
24 #include <linux/export.h>
25 #include <linux/sched.h>
26 #include <linux/sched/clock.h>
27 #include <linux/start_kernel.h>
29 #include <asm/cacheflush.h>
30 #include <asm/processor.h>
31 #include <asm/sections.h>
34 #include <asm/machdep.h> /* for pa7300lc_init() proto */
35 #include <asm/pdc_chassis.h>
37 #include <asm/setup.h>
38 #include <asm/unwind.h>
41 static char __initdata command_line[COMMAND_LINE_SIZE];
43 /* Intended for ccio/sba/cpu statistics under /proc/bus/{runway|gsc} */
44 struct proc_dir_entry * proc_runway_root __read_mostly = NULL;
45 struct proc_dir_entry * proc_gsc_root __read_mostly = NULL;
46 struct proc_dir_entry * proc_mckinley_root __read_mostly = NULL;
48 static void __init setup_cmdline(char **cmdline_p)
50 extern unsigned int boot_args[];
53 *cmdline_p = command_line;
55 /* boot_args[0] is free-mem start, boot_args[1] is ptr to command line */
56 if (boot_args[0] < 64)
57 return; /* return if called from hpux boot loader */
59 /* Collect stuff passed in from the boot loader */
60 strscpy(boot_command_line, (char *)__va(boot_args[1]),
63 /* autodetect console type (if not done by palo yet) */
64 p = boot_command_line;
65 if (!str_has_prefix(p, "console=") && !strstr(p, " console=")) {
66 strlcat(p, " console=", COMMAND_LINE_SIZE);
67 if (PAGE0->mem_cons.cl_class == CL_DUPLEX)
68 strlcat(p, "ttyS0", COMMAND_LINE_SIZE);
70 strlcat(p, "tty0", COMMAND_LINE_SIZE);
73 /* default to use early console */
74 if (!strstr(p, "earlycon"))
75 strlcat(p, " earlycon=pdc", COMMAND_LINE_SIZE);
77 #ifdef CONFIG_BLK_DEV_INITRD
78 /* did palo pass us a ramdisk? */
79 if (boot_args[2] != 0) {
80 initrd_start = (unsigned long)__va(boot_args[2]);
81 initrd_end = (unsigned long)__va(boot_args[3]);
85 strscpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
89 static void __init dma_ops_init(void)
91 switch (boot_cpu_data.cpu_type) {
94 * We've got way too many dependencies on 1.1 semantics
95 * to support 1.0 boxes at this point.
97 panic( "PA-RISC Linux currently only supports machines that conform to\n"
98 "the PA-RISC 1.1 or 2.0 architecture specification.\n");
109 void __init setup_arch(char **cmdline_p)
112 extern int parisc_narrow_firmware;
116 init_per_cpu(smp_processor_id()); /* Set Modes & Enable FP */
119 printk(KERN_INFO "The 64-bit Kernel has started...\n");
121 printk(KERN_INFO "The 32-bit Kernel has started...\n");
124 printk(KERN_INFO "Kernel default page size is %d KB. Huge pages ",
125 (int)(PAGE_SIZE / 1024));
126 #ifdef CONFIG_HUGETLB_PAGE
127 printk(KERN_CONT "enabled with %d MB physical and %d MB virtual size",
128 1 << (REAL_HPAGE_SHIFT - 20), 1 << (HPAGE_SHIFT - 20));
130 printk(KERN_CONT "disabled");
132 printk(KERN_CONT ".\n");
135 * Check if initial kernel page mappings are sufficient.
136 * panic early if not, else we may access kernel functions
137 * and variables which can't be reached.
139 if (__pa((unsigned long) &_end) >= KERNEL_INITIAL_SIZE)
140 panic("KERNEL_INITIAL_ORDER too small!");
143 if(parisc_narrow_firmware) {
144 printk(KERN_INFO "Kernel is using PDC in 32-bit mode.\n");
148 setup_cmdline(cmdline_p);
149 collect_boot_cpu_data();
150 do_memory_inventory(); /* probe for physical memory */
154 #ifdef CONFIG_CHASSIS_LCD_LED
155 /* initialize the LCD/LED after boot_cpu_data is available ! */
156 led_init(); /* LCD/LED initialization */
163 clear_sched_clock_stable();
167 * Display CPU info for all CPUs.
170 c_start (struct seq_file *m, loff_t *pos)
172 /* Looks like the caller will call repeatedly until we return
173 * 0, signaling EOF perhaps. This could be used to sequence
174 * through CPUs for example. Since we print all cpu info in our
175 * show_cpuinfo() disregarding 'pos' (which I assume is 'v' above)
176 * we only allow for one "position". */
177 return ((long)*pos < 1) ? (void *)1 : NULL;
181 c_next (struct seq_file *m, void *v, loff_t *pos)
184 return c_start(m, pos);
188 c_stop (struct seq_file *m, void *v)
192 const struct seq_operations cpuinfo_op = {
199 static void __init parisc_proc_mkdir(void)
202 ** Can't call proc_mkdir() until after proc_root_init() has been
203 ** called by start_kernel(). In other words, this code can't
204 ** live in arch/.../setup.c because start_parisc() calls
207 switch (boot_cpu_data.cpu_type) {
210 if (NULL == proc_gsc_root)
212 proc_gsc_root = proc_mkdir("bus/gsc", NULL);
221 if (NULL == proc_runway_root)
223 proc_runway_root = proc_mkdir("bus/runway", NULL);
228 if (NULL == proc_mckinley_root)
230 proc_mckinley_root = proc_mkdir("bus/mckinley", NULL);
234 /* FIXME: this was added to prevent the compiler
235 * complaining about missing pcx, pcxs and pcxt
236 * I'm assuming they have neither gsc nor runway */
241 static struct resource central_bus = {
242 .name = "Central Bus",
243 .start = F_EXTEND(0xfff80000),
244 .end = F_EXTEND(0xfffaffff),
245 .flags = IORESOURCE_MEM,
248 static struct resource local_broadcast = {
249 .name = "Local Broadcast",
250 .start = F_EXTEND(0xfffb0000),
251 .end = F_EXTEND(0xfffdffff),
252 .flags = IORESOURCE_MEM,
255 static struct resource global_broadcast = {
256 .name = "Global Broadcast",
257 .start = F_EXTEND(0xfffe0000),
258 .end = F_EXTEND(0xffffffff),
259 .flags = IORESOURCE_MEM,
262 static int __init parisc_init_resources(void)
266 result = request_resource(&iomem_resource, ¢ral_bus);
269 "%s: failed to claim %s address space!\n",
270 __FILE__, central_bus.name);
274 result = request_resource(&iomem_resource, &local_broadcast);
277 "%s: failed to claim %s address space!\n",
278 __FILE__, local_broadcast.name);
282 result = request_resource(&iomem_resource, &global_broadcast);
285 "%s: failed to claim %s address space!\n",
286 __FILE__, global_broadcast.name);
293 static int __init parisc_init(void)
295 u32 osid = (OS_ID_LINUX << 16);
298 parisc_init_resources();
299 do_device_inventory(); /* probe for hardware */
301 parisc_pdc_chassis_init();
303 /* set up a new led state on systems shipped LED State panel */
304 pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BSTART);
306 /* tell PDC we're Linux. Nevermind failure. */
307 pdc_stable_write(0x40, &osid, sizeof(osid));
309 /* start with known state */
310 flush_cache_all_local();
311 flush_tlb_all_local(NULL);
315 pr_info("CPU(s): %d out of %d %s at %d.%06d MHz online\n",
316 num_online_cpus(), num_present_cpus(),
318 pr_info("CPU(s): 1 x %s at %d.%06d MHz\n",
320 boot_cpu_data.cpu_name,
321 boot_cpu_data.cpu_hz / 1000000,
322 boot_cpu_data.cpu_hz % 1000000 );
324 #if defined(CONFIG_64BIT) && defined(CONFIG_SMP)
325 /* Don't serialize TLB flushes if we run on one CPU only. */
326 if (num_online_cpus() == 1)
327 pa_serialize_tlb_flushes = 0;
330 apply_alternatives_all();
331 parisc_setup_cache_timing();
333 /* These are in a non-obvious order, will fix when we have an iotree */
334 #if defined(CONFIG_IOSAPIC)
337 #if defined(CONFIG_IOMMU_SBA)
340 #if defined(CONFIG_PCI_LBA)
344 /* CCIO before any potential subdevices */
345 #if defined(CONFIG_IOMMU_CCIO)
350 * Need to register Asp & Wax before the EISA adapters for the IRQ
351 * regions. EISA must come before PCI to be sure it gets IRQ region
354 #if defined(CONFIG_GSC_LASI) || defined(CONFIG_GSC_WAX)
361 #if defined(CONFIG_HPPB)
365 #if defined(CONFIG_GSC_DINO)
369 #ifdef CONFIG_CHASSIS_LCD_LED
370 register_led_regions(); /* register LED port info in procfs */
375 arch_initcall(parisc_init);
377 void __init start_parisc(void)
380 struct pdc_coproc_cfg coproc_cfg;
382 /* check QEMU/SeaBIOS marker in PAGE0 */
383 running_on_qemu = (memcmp(&PAGE0->pad0, "SeaBIOS", 8) == 0);
385 cpunum = smp_processor_id();
389 set_firmware_width_unlocked();
391 ret = pdc_coproc_cfg_unlocked(&coproc_cfg);
392 if (ret >= 0 && coproc_cfg.ccr_functional) {
393 mtctl(coproc_cfg.ccr_functional, 10);
395 per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;
396 per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model;
398 asm volatile ("fstd %fr0,8(%sp)");
400 panic("must have an fpu to boot linux");
403 early_trap_init(); /* initialize checksum of fault_vector */