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