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 static void __init setup_cmdline(char **cmdline_p)
45 extern unsigned int boot_args[];
48 *cmdline_p = command_line;
50 /* boot_args[0] is free-mem start, boot_args[1] is ptr to command line */
51 if (boot_args[0] < 64)
52 return; /* return if called from hpux boot loader */
54 /* Collect stuff passed in from the boot loader */
55 strscpy(boot_command_line, (char *)__va(boot_args[1]),
58 /* autodetect console type (if not done by palo yet) */
59 p = boot_command_line;
60 if (!str_has_prefix(p, "console=") && !strstr(p, " console=")) {
61 strlcat(p, " console=", COMMAND_LINE_SIZE);
62 if (PAGE0->mem_cons.cl_class == CL_DUPLEX)
63 strlcat(p, "ttyS0", COMMAND_LINE_SIZE);
65 strlcat(p, "tty0", COMMAND_LINE_SIZE);
68 /* default to use early console */
69 if (!strstr(p, "earlycon"))
70 strlcat(p, " earlycon=pdc", COMMAND_LINE_SIZE);
72 #ifdef CONFIG_BLK_DEV_INITRD
73 /* did palo pass us a ramdisk? */
74 if (boot_args[2] != 0) {
75 initrd_start = (unsigned long)__va(boot_args[2]);
76 initrd_end = (unsigned long)__va(boot_args[3]);
80 strscpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
84 static void __init dma_ops_init(void)
86 switch (boot_cpu_data.cpu_type) {
89 * We've got way too many dependencies on 1.1 semantics
90 * to support 1.0 boxes at this point.
92 panic( "PA-RISC Linux currently only supports machines that conform to\n"
93 "the PA-RISC 1.1 or 2.0 architecture specification.\n");
104 void __init setup_arch(char **cmdline_p)
107 extern int parisc_narrow_firmware;
111 init_per_cpu(smp_processor_id()); /* Set Modes & Enable FP */
114 printk(KERN_INFO "The 64-bit Kernel has started...\n");
116 printk(KERN_INFO "The 32-bit Kernel has started...\n");
119 printk(KERN_INFO "Kernel default page size is %d KB. Huge pages ",
120 (int)(PAGE_SIZE / 1024));
121 #ifdef CONFIG_HUGETLB_PAGE
122 printk(KERN_CONT "enabled with %d MB physical and %d MB virtual size",
123 1 << (REAL_HPAGE_SHIFT - 20), 1 << (HPAGE_SHIFT - 20));
125 printk(KERN_CONT "disabled");
127 printk(KERN_CONT ".\n");
130 * Check if initial kernel page mappings are sufficient.
131 * panic early if not, else we may access kernel functions
132 * and variables which can't be reached.
134 if (__pa((unsigned long) &_end) >= KERNEL_INITIAL_SIZE)
135 panic("KERNEL_INITIAL_ORDER too small!");
138 if(parisc_narrow_firmware) {
139 printk(KERN_INFO "Kernel is using PDC in 32-bit mode.\n");
143 setup_cmdline(cmdline_p);
144 collect_boot_cpu_data();
145 do_memory_inventory(); /* probe for physical memory */
149 #ifdef CONFIG_CHASSIS_LCD_LED
150 /* initialize the LCD/LED after boot_cpu_data is available ! */
151 led_init(); /* LCD/LED initialization */
158 clear_sched_clock_stable();
162 * Display CPU info for all CPUs.
165 c_start (struct seq_file *m, loff_t *pos)
167 /* Looks like the caller will call repeatedly until we return
168 * 0, signaling EOF perhaps. This could be used to sequence
169 * through CPUs for example. Since we print all cpu info in our
170 * show_cpuinfo() disregarding 'pos' (which I assume is 'v' above)
171 * we only allow for one "position". */
172 return ((long)*pos < 1) ? (void *)1 : NULL;
176 c_next (struct seq_file *m, void *v, loff_t *pos)
179 return c_start(m, pos);
183 c_stop (struct seq_file *m, void *v)
187 const struct seq_operations cpuinfo_op = {
194 static struct resource central_bus = {
195 .name = "Central Bus",
196 .start = F_EXTEND(0xfff80000),
197 .end = F_EXTEND(0xfffaffff),
198 .flags = IORESOURCE_MEM,
201 static struct resource local_broadcast = {
202 .name = "Local Broadcast",
203 .start = F_EXTEND(0xfffb0000),
204 .end = F_EXTEND(0xfffdffff),
205 .flags = IORESOURCE_MEM,
208 static struct resource global_broadcast = {
209 .name = "Global Broadcast",
210 .start = F_EXTEND(0xfffe0000),
211 .end = F_EXTEND(0xffffffff),
212 .flags = IORESOURCE_MEM,
215 static int __init parisc_init_resources(void)
219 result = request_resource(&iomem_resource, ¢ral_bus);
222 "%s: failed to claim %s address space!\n",
223 __FILE__, central_bus.name);
227 result = request_resource(&iomem_resource, &local_broadcast);
230 "%s: failed to claim %s address space!\n",
231 __FILE__, local_broadcast.name);
235 result = request_resource(&iomem_resource, &global_broadcast);
238 "%s: failed to claim %s address space!\n",
239 __FILE__, global_broadcast.name);
246 static int __init parisc_init(void)
248 u32 osid = (OS_ID_LINUX << 16);
250 parisc_init_resources();
251 do_device_inventory(); /* probe for hardware */
253 parisc_pdc_chassis_init();
255 /* set up a new led state on systems shipped LED State panel */
256 pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BSTART);
258 /* tell PDC we're Linux. Nevermind failure. */
259 pdc_stable_write(0x40, &osid, sizeof(osid));
261 /* start with known state */
262 flush_cache_all_local();
263 flush_tlb_all_local(NULL);
267 pr_info("CPU(s): %d out of %d %s at %d.%06d MHz online\n",
268 num_online_cpus(), num_present_cpus(),
270 pr_info("CPU(s): 1 x %s at %d.%06d MHz\n",
272 boot_cpu_data.cpu_name,
273 boot_cpu_data.cpu_hz / 1000000,
274 boot_cpu_data.cpu_hz % 1000000 );
276 #if defined(CONFIG_64BIT) && defined(CONFIG_SMP)
277 /* Don't serialize TLB flushes if we run on one CPU only. */
278 if (num_online_cpus() == 1)
279 pa_serialize_tlb_flushes = 0;
282 apply_alternatives_all();
283 parisc_setup_cache_timing();
285 /* These are in a non-obvious order, will fix when we have an iotree */
286 #if defined(CONFIG_IOSAPIC)
289 #if defined(CONFIG_IOMMU_SBA)
292 #if defined(CONFIG_PCI_LBA)
296 /* CCIO before any potential subdevices */
297 #if defined(CONFIG_IOMMU_CCIO)
302 * Need to register Asp & Wax before the EISA adapters for the IRQ
303 * regions. EISA must come before PCI to be sure it gets IRQ region
306 #if defined(CONFIG_GSC_LASI) || defined(CONFIG_GSC_WAX)
313 #if defined(CONFIG_HPPB)
317 #if defined(CONFIG_GSC_DINO)
321 #ifdef CONFIG_CHASSIS_LCD_LED
322 register_led_regions(); /* register LED port info in procfs */
327 arch_initcall(parisc_init);
329 void __init start_parisc(void)
332 struct pdc_coproc_cfg coproc_cfg;
334 /* check QEMU/SeaBIOS marker in PAGE0 */
335 running_on_qemu = (memcmp(&PAGE0->pad0, "SeaBIOS", 8) == 0);
337 cpunum = smp_processor_id();
341 set_firmware_width_unlocked();
343 ret = pdc_coproc_cfg_unlocked(&coproc_cfg);
344 if (ret >= 0 && coproc_cfg.ccr_functional) {
345 mtctl(coproc_cfg.ccr_functional, 10);
347 per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;
348 per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model;
350 asm volatile ("fstd %fr0,8(%sp)");
352 panic("must have an fpu to boot linux");
355 early_trap_init(); /* initialize checksum of fault_vector */