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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Initial setup-routines for HP 9000 based hardware.
4 *
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>
11 *
12 * Initial PA-RISC Version: 04-23-1999 by Helge Deller
13 */
14
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>
20#define PCI_DEBUG
21#include <linux/pci.h>
22#undef PCI_DEBUG
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>
28
29#include <asm/cacheflush.h>
30#include <asm/processor.h>
31#include <asm/sections.h>
32#include <asm/pdc.h>
33#include <asm/led.h>
34#include <asm/pdc_chassis.h>
35#include <asm/io.h>
36#include <asm/setup.h>
37#include <asm/unwind.h>
38#include <asm/smp.h>
39
40static char __initdata command_line[COMMAND_LINE_SIZE];
41
42static void __init setup_cmdline(char **cmdline_p)
43{
44 extern unsigned int boot_args[];
45 char *p;
46
47 *cmdline_p = command_line;
48
49 /* boot_args[0] is free-mem start, boot_args[1] is ptr to command line */
50 if (boot_args[0] < 64)
51 return; /* return if called from hpux boot loader */
52
53 /* Collect stuff passed in from the boot loader */
54 strscpy(boot_command_line, (char *)__va(boot_args[1]),
55 COMMAND_LINE_SIZE);
56
57 /* autodetect console type (if not done by palo yet) */
58 p = boot_command_line;
59 if (!str_has_prefix(p, "console=") && !strstr(p, " console=")) {
60 strlcat(p, " console=", COMMAND_LINE_SIZE);
61 if (PAGE0->mem_cons.cl_class == CL_DUPLEX)
62 strlcat(p, "ttyS0", COMMAND_LINE_SIZE);
63 else
64 strlcat(p, "tty0", COMMAND_LINE_SIZE);
65 }
66
67 /* default to use early console */
68 if (!strstr(p, "earlycon"))
69 strlcat(p, " earlycon=pdc", COMMAND_LINE_SIZE);
70
71#ifdef CONFIG_BLK_DEV_INITRD
72 /* did palo pass us a ramdisk? */
73 if (boot_args[2] != 0) {
74 initrd_start = (unsigned long)__va(boot_args[2]);
75 initrd_end = (unsigned long)__va(boot_args[3]);
76 }
77#endif
78
79 strscpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
80}
81
82#ifdef CONFIG_PA11
83static void __init dma_ops_init(void)
84{
85 switch (boot_cpu_data.cpu_type) {
86 case pcx:
87 /*
88 * We've got way too many dependencies on 1.1 semantics
89 * to support 1.0 boxes at this point.
90 */
91 panic( "PA-RISC Linux currently only supports machines that conform to\n"
92 "the PA-RISC 1.1 or 2.0 architecture specification.\n");
93
94 case pcxl2:
95 default:
96 break;
97 }
98}
99#endif
100
101void __init setup_arch(char **cmdline_p)
102{
103 unwind_init();
104
105 init_per_cpu(smp_processor_id()); /* Set Modes & Enable FP */
106
107#ifdef CONFIG_64BIT
108 printk(KERN_INFO "The 64-bit Kernel has started...\n");
109#else
110 printk(KERN_INFO "The 32-bit Kernel has started...\n");
111#endif
112
113 printk(KERN_INFO "Kernel default page size is %d KB. Huge pages ",
114 (int)(PAGE_SIZE / 1024));
115#ifdef CONFIG_HUGETLB_PAGE
116 printk(KERN_CONT "enabled with %d MB physical and %d MB virtual size",
117 1 << (REAL_HPAGE_SHIFT - 20), 1 << (HPAGE_SHIFT - 20));
118#else
119 printk(KERN_CONT "disabled");
120#endif
121 printk(KERN_CONT ".\n");
122
123 /*
124 * Check if initial kernel page mappings are sufficient.
125 * panic early if not, else we may access kernel functions
126 * and variables which can't be reached.
127 */
128 if (__pa((unsigned long) &_end) >= KERNEL_INITIAL_SIZE)
129 panic("KERNEL_INITIAL_ORDER too small!");
130
131#ifdef CONFIG_64BIT
132 if(parisc_narrow_firmware) {
133 printk(KERN_INFO "Kernel is using PDC in 32-bit mode.\n");
134 }
135#endif
136 setup_pdc();
137 setup_cmdline(cmdline_p);
138 collect_boot_cpu_data();
139 do_memory_inventory(); /* probe for physical memory */
140 parisc_cache_init();
141 paging_init();
142
143#ifdef CONFIG_PA11
144 dma_ops_init();
145#endif
146
147 clear_sched_clock_stable();
148}
149
150/*
151 * Display CPU info for all CPUs.
152 */
153static void *
154c_start (struct seq_file *m, loff_t *pos)
155{
156 /* Looks like the caller will call repeatedly until we return
157 * 0, signaling EOF perhaps. This could be used to sequence
158 * through CPUs for example. Since we print all cpu info in our
159 * show_cpuinfo() disregarding 'pos' (which I assume is 'v' above)
160 * we only allow for one "position". */
161 return ((long)*pos < 1) ? (void *)1 : NULL;
162}
163
164static void *
165c_next (struct seq_file *m, void *v, loff_t *pos)
166{
167 ++*pos;
168 return c_start(m, pos);
169}
170
171static void
172c_stop (struct seq_file *m, void *v)
173{
174}
175
176const struct seq_operations cpuinfo_op = {
177 .start = c_start,
178 .next = c_next,
179 .stop = c_stop,
180 .show = show_cpuinfo
181};
182
183static struct resource central_bus = {
184 .name = "Central Bus",
185 .start = F_EXTEND(0xfff80000),
186 .end = F_EXTEND(0xfffaffff),
187 .flags = IORESOURCE_MEM,
188};
189
190static struct resource local_broadcast = {
191 .name = "Local Broadcast",
192 .start = F_EXTEND(0xfffb0000),
193 .end = F_EXTEND(0xfffdffff),
194 .flags = IORESOURCE_MEM,
195};
196
197static struct resource global_broadcast = {
198 .name = "Global Broadcast",
199 .start = F_EXTEND(0xfffe0000),
200 .end = F_EXTEND(0xffffffff),
201 .flags = IORESOURCE_MEM,
202};
203
204static int __init parisc_init_resources(void)
205{
206 int result;
207
208 result = request_resource(&iomem_resource, ¢ral_bus);
209 if (result < 0) {
210 printk(KERN_ERR
211 "%s: failed to claim %s address space!\n",
212 __FILE__, central_bus.name);
213 return result;
214 }
215
216 result = request_resource(&iomem_resource, &local_broadcast);
217 if (result < 0) {
218 printk(KERN_ERR
219 "%s: failed to claim %s address space!\n",
220 __FILE__, local_broadcast.name);
221 return result;
222 }
223
224 result = request_resource(&iomem_resource, &global_broadcast);
225 if (result < 0) {
226 printk(KERN_ERR
227 "%s: failed to claim %s address space!\n",
228 __FILE__, global_broadcast.name);
229 return result;
230 }
231
232 return 0;
233}
234
235static int __init parisc_init(void)
236{
237 u32 osid = (OS_ID_LINUX << 16);
238
239 parisc_init_resources();
240 do_device_inventory(); /* probe for hardware */
241
242 parisc_pdc_chassis_init();
243
244 /* set up a new led state on systems shipped LED State panel */
245 pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BSTART);
246
247 /* tell PDC we're Linux. Nevermind failure. */
248 pdc_stable_write(0x40, &osid, sizeof(osid));
249
250 /* start with known state */
251 flush_cache_all_local();
252 flush_tlb_all_local(NULL);
253
254 processor_init();
255#ifdef CONFIG_SMP
256 pr_info("CPU(s): %d out of %d %s at %d.%06d MHz online\n",
257 num_online_cpus(), num_present_cpus(),
258#else
259 pr_info("CPU(s): 1 x %s at %d.%06d MHz\n",
260#endif
261 boot_cpu_data.cpu_name,
262 boot_cpu_data.cpu_hz / 1000000,
263 boot_cpu_data.cpu_hz % 1000000 );
264
265#if defined(CONFIG_64BIT) && defined(CONFIG_SMP)
266 /* Don't serialize TLB flushes if we run on one CPU only. */
267 if (num_online_cpus() == 1)
268 pa_serialize_tlb_flushes = 0;
269#endif
270
271 apply_alternatives_all();
272 parisc_setup_cache_timing();
273 return 0;
274}
275arch_initcall(parisc_init);
276
277void __init start_parisc(void)
278{
279 int ret, cpunum;
280 struct pdc_coproc_cfg coproc_cfg;
281
282 /* check QEMU/SeaBIOS marker in PAGE0 */
283 running_on_qemu = (memcmp(&PAGE0->pad0, "SeaBIOS", 8) == 0);
284
285 cpunum = smp_processor_id();
286
287 init_cpu_topology();
288
289 set_firmware_width_unlocked();
290
291 ret = pdc_coproc_cfg_unlocked(&coproc_cfg);
292 if (ret >= 0 && coproc_cfg.ccr_functional) {
293 mtctl(coproc_cfg.ccr_functional, 10);
294
295 per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;
296 per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model;
297
298 asm volatile ("fstd %fr0,8(%sp)");
299 } else {
300 panic("must have an fpu to boot linux");
301 }
302
303 early_trap_init(); /* initialize checksum of fault_vector */
304
305 start_kernel();
306 // not reached
307}
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#include <linux/sched.h>
40#include <linux/sched/clock.h>
41#include <linux/start_kernel.h>
42
43#include <asm/processor.h>
44#include <asm/sections.h>
45#include <asm/pdc.h>
46#include <asm/led.h>
47#include <asm/machdep.h> /* for pa7300lc_init() proto */
48#include <asm/pdc_chassis.h>
49#include <asm/io.h>
50#include <asm/setup.h>
51#include <asm/unwind.h>
52#include <asm/smp.h>
53
54static char __initdata command_line[COMMAND_LINE_SIZE];
55
56/* Intended for ccio/sba/cpu statistics under /proc/bus/{runway|gsc} */
57struct proc_dir_entry * proc_runway_root __read_mostly = NULL;
58struct proc_dir_entry * proc_gsc_root __read_mostly = NULL;
59struct proc_dir_entry * proc_mckinley_root __read_mostly = NULL;
60
61#if !defined(CONFIG_PA20) && (defined(CONFIG_IOMMU_CCIO) || defined(CONFIG_IOMMU_SBA))
62int parisc_bus_is_phys __read_mostly = 1; /* Assume no IOMMU is present */
63EXPORT_SYMBOL(parisc_bus_is_phys);
64#endif
65
66void __init setup_cmdline(char **cmdline_p)
67{
68 extern unsigned int boot_args[];
69
70 /* Collect stuff passed in from the boot loader */
71
72 /* boot_args[0] is free-mem start, boot_args[1] is ptr to command line */
73 if (boot_args[0] < 64) {
74 /* called from hpux boot loader */
75 boot_command_line[0] = '\0';
76 } else {
77 strlcpy(boot_command_line, (char *)__va(boot_args[1]),
78 COMMAND_LINE_SIZE);
79
80#ifdef CONFIG_BLK_DEV_INITRD
81 if (boot_args[2] != 0) /* did palo pass us a ramdisk? */
82 {
83 initrd_start = (unsigned long)__va(boot_args[2]);
84 initrd_end = (unsigned long)__va(boot_args[3]);
85 }
86#endif
87 }
88
89 strcpy(command_line, boot_command_line);
90 *cmdline_p = command_line;
91}
92
93#ifdef CONFIG_PA11
94void __init dma_ops_init(void)
95{
96 switch (boot_cpu_data.cpu_type) {
97 case pcx:
98 /*
99 * We've got way too many dependencies on 1.1 semantics
100 * to support 1.0 boxes at this point.
101 */
102 panic( "PA-RISC Linux currently only supports machines that conform to\n"
103 "the PA-RISC 1.1 or 2.0 architecture specification.\n");
104
105 case pcxs:
106 case pcxt:
107 hppa_dma_ops = &pcx_dma_ops;
108 break;
109 case pcxl2:
110 pa7300lc_init();
111 case pcxl: /* falls through */
112 hppa_dma_ops = &pcxl_dma_ops;
113 break;
114 default:
115 break;
116 }
117}
118#endif
119
120extern void collect_boot_cpu_data(void);
121
122void __init setup_arch(char **cmdline_p)
123{
124#ifdef CONFIG_64BIT
125 extern int parisc_narrow_firmware;
126#endif
127 unwind_init();
128
129 init_per_cpu(smp_processor_id()); /* Set Modes & Enable FP */
130
131#ifdef CONFIG_64BIT
132 printk(KERN_INFO "The 64-bit Kernel has started...\n");
133#else
134 printk(KERN_INFO "The 32-bit Kernel has started...\n");
135#endif
136
137 printk(KERN_INFO "Kernel default page size is %d KB. Huge pages ",
138 (int)(PAGE_SIZE / 1024));
139#ifdef CONFIG_HUGETLB_PAGE
140 printk(KERN_CONT "enabled with %d MB physical and %d MB virtual size",
141 1 << (REAL_HPAGE_SHIFT - 20), 1 << (HPAGE_SHIFT - 20));
142#else
143 printk(KERN_CONT "disabled");
144#endif
145 printk(KERN_CONT ".\n");
146
147 /*
148 * Check if initial kernel page mappings are sufficient.
149 * panic early if not, else we may access kernel functions
150 * and variables which can't be reached.
151 */
152 if (__pa((unsigned long) &_end) >= KERNEL_INITIAL_SIZE)
153 panic("KERNEL_INITIAL_ORDER too small!");
154
155 pdc_console_init();
156
157#ifdef CONFIG_64BIT
158 if(parisc_narrow_firmware) {
159 printk(KERN_INFO "Kernel is using PDC in 32-bit mode.\n");
160 }
161#endif
162 setup_pdc();
163 setup_cmdline(cmdline_p);
164 collect_boot_cpu_data();
165 do_memory_inventory(); /* probe for physical memory */
166 parisc_cache_init();
167 paging_init();
168
169#ifdef CONFIG_CHASSIS_LCD_LED
170 /* initialize the LCD/LED after boot_cpu_data is available ! */
171 led_init(); /* LCD/LED initialization */
172#endif
173
174#ifdef CONFIG_PA11
175 dma_ops_init();
176#endif
177
178#if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
179 conswitchp = &dummy_con; /* we use do_take_over_console() later ! */
180#endif
181
182 clear_sched_clock_stable();
183}
184
185/*
186 * Display CPU info for all CPUs.
187 * for parisc this is in processor.c
188 */
189extern int show_cpuinfo (struct seq_file *m, void *v);
190
191static void *
192c_start (struct seq_file *m, loff_t *pos)
193{
194 /* Looks like the caller will call repeatedly until we return
195 * 0, signaling EOF perhaps. This could be used to sequence
196 * through CPUs for example. Since we print all cpu info in our
197 * show_cpuinfo() disregarding 'pos' (which I assume is 'v' above)
198 * we only allow for one "position". */
199 return ((long)*pos < 1) ? (void *)1 : NULL;
200}
201
202static void *
203c_next (struct seq_file *m, void *v, loff_t *pos)
204{
205 ++*pos;
206 return c_start(m, pos);
207}
208
209static void
210c_stop (struct seq_file *m, void *v)
211{
212}
213
214const struct seq_operations cpuinfo_op = {
215 .start = c_start,
216 .next = c_next,
217 .stop = c_stop,
218 .show = show_cpuinfo
219};
220
221static void __init parisc_proc_mkdir(void)
222{
223 /*
224 ** Can't call proc_mkdir() until after proc_root_init() has been
225 ** called by start_kernel(). In other words, this code can't
226 ** live in arch/.../setup.c because start_parisc() calls
227 ** start_kernel().
228 */
229 switch (boot_cpu_data.cpu_type) {
230 case pcxl:
231 case pcxl2:
232 if (NULL == proc_gsc_root)
233 {
234 proc_gsc_root = proc_mkdir("bus/gsc", NULL);
235 }
236 break;
237 case pcxt_:
238 case pcxu:
239 case pcxu_:
240 case pcxw:
241 case pcxw_:
242 case pcxw2:
243 if (NULL == proc_runway_root)
244 {
245 proc_runway_root = proc_mkdir("bus/runway", NULL);
246 }
247 break;
248 case mako:
249 case mako2:
250 if (NULL == proc_mckinley_root)
251 {
252 proc_mckinley_root = proc_mkdir("bus/mckinley", NULL);
253 }
254 break;
255 default:
256 /* FIXME: this was added to prevent the compiler
257 * complaining about missing pcx, pcxs and pcxt
258 * I'm assuming they have neither gsc nor runway */
259 break;
260 }
261}
262
263static struct resource central_bus = {
264 .name = "Central Bus",
265 .start = F_EXTEND(0xfff80000),
266 .end = F_EXTEND(0xfffaffff),
267 .flags = IORESOURCE_MEM,
268};
269
270static struct resource local_broadcast = {
271 .name = "Local Broadcast",
272 .start = F_EXTEND(0xfffb0000),
273 .end = F_EXTEND(0xfffdffff),
274 .flags = IORESOURCE_MEM,
275};
276
277static struct resource global_broadcast = {
278 .name = "Global Broadcast",
279 .start = F_EXTEND(0xfffe0000),
280 .end = F_EXTEND(0xffffffff),
281 .flags = IORESOURCE_MEM,
282};
283
284static int __init parisc_init_resources(void)
285{
286 int result;
287
288 result = request_resource(&iomem_resource, ¢ral_bus);
289 if (result < 0) {
290 printk(KERN_ERR
291 "%s: failed to claim %s address space!\n",
292 __FILE__, central_bus.name);
293 return result;
294 }
295
296 result = request_resource(&iomem_resource, &local_broadcast);
297 if (result < 0) {
298 printk(KERN_ERR
299 "%s: failed to claim %saddress space!\n",
300 __FILE__, local_broadcast.name);
301 return result;
302 }
303
304 result = request_resource(&iomem_resource, &global_broadcast);
305 if (result < 0) {
306 printk(KERN_ERR
307 "%s: failed to claim %s address space!\n",
308 __FILE__, global_broadcast.name);
309 return result;
310 }
311
312 return 0;
313}
314
315extern void gsc_init(void);
316extern void processor_init(void);
317extern void ccio_init(void);
318extern void hppb_init(void);
319extern void dino_init(void);
320extern void iosapic_init(void);
321extern void lba_init(void);
322extern void sba_init(void);
323extern void eisa_init(void);
324
325static int __init parisc_init(void)
326{
327 u32 osid = (OS_ID_LINUX << 16);
328
329 parisc_proc_mkdir();
330 parisc_init_resources();
331 do_device_inventory(); /* probe for hardware */
332
333 parisc_pdc_chassis_init();
334
335 /* set up a new led state on systems shipped LED State panel */
336 pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BSTART);
337
338 /* tell PDC we're Linux. Nevermind failure. */
339 pdc_stable_write(0x40, &osid, sizeof(osid));
340
341 /* start with known state */
342 flush_cache_all_local();
343 flush_tlb_all_local(NULL);
344
345 processor_init();
346#ifdef CONFIG_SMP
347 pr_info("CPU(s): %d out of %d %s at %d.%06d MHz online\n",
348 num_online_cpus(), num_present_cpus(),
349#else
350 pr_info("CPU(s): 1 x %s at %d.%06d MHz\n",
351#endif
352 boot_cpu_data.cpu_name,
353 boot_cpu_data.cpu_hz / 1000000,
354 boot_cpu_data.cpu_hz % 1000000 );
355
356 parisc_setup_cache_timing();
357
358 /* These are in a non-obvious order, will fix when we have an iotree */
359#if defined(CONFIG_IOSAPIC)
360 iosapic_init();
361#endif
362#if defined(CONFIG_IOMMU_SBA)
363 sba_init();
364#endif
365#if defined(CONFIG_PCI_LBA)
366 lba_init();
367#endif
368
369 /* CCIO before any potential subdevices */
370#if defined(CONFIG_IOMMU_CCIO)
371 ccio_init();
372#endif
373
374 /*
375 * Need to register Asp & Wax before the EISA adapters for the IRQ
376 * regions. EISA must come before PCI to be sure it gets IRQ region
377 * 0.
378 */
379#if defined(CONFIG_GSC_LASI) || defined(CONFIG_GSC_WAX)
380 gsc_init();
381#endif
382#ifdef CONFIG_EISA
383 eisa_init();
384#endif
385
386#if defined(CONFIG_HPPB)
387 hppb_init();
388#endif
389
390#if defined(CONFIG_GSC_DINO)
391 dino_init();
392#endif
393
394#ifdef CONFIG_CHASSIS_LCD_LED
395 register_led_regions(); /* register LED port info in procfs */
396#endif
397
398 return 0;
399}
400arch_initcall(parisc_init);
401
402void __init start_parisc(void)
403{
404 extern void early_trap_init(void);
405
406 int ret, cpunum;
407 struct pdc_coproc_cfg coproc_cfg;
408
409 cpunum = smp_processor_id();
410
411 init_cpu_topology();
412
413 set_firmware_width_unlocked();
414
415 ret = pdc_coproc_cfg_unlocked(&coproc_cfg);
416 if (ret >= 0 && coproc_cfg.ccr_functional) {
417 mtctl(coproc_cfg.ccr_functional, 10);
418
419 per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;
420 per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model;
421
422 asm volatile ("fstd %fr0,8(%sp)");
423 } else {
424 panic("must have an fpu to boot linux");
425 }
426
427 early_trap_init(); /* initialize checksum of fault_vector */
428
429 start_kernel();
430 // not reached
431}