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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/machdep.h> /* for pa7300lc_init() proto */
35#include <asm/pdc_chassis.h>
36#include <asm/io.h>
37#include <asm/setup.h>
38#include <asm/unwind.h>
39#include <asm/smp.h>
40
41static char __initdata command_line[COMMAND_LINE_SIZE];
42
43/* Intended for ccio/sba/cpu statistics under /proc/bus/{runway|gsc} */
44struct proc_dir_entry * proc_runway_root __read_mostly = NULL;
45struct proc_dir_entry * proc_gsc_root __read_mostly = NULL;
46struct proc_dir_entry * proc_mckinley_root __read_mostly = NULL;
47
48void __init setup_cmdline(char **cmdline_p)
49{
50 extern unsigned int boot_args[];
51
52 /* Collect stuff passed in from the boot loader */
53
54 /* boot_args[0] is free-mem start, boot_args[1] is ptr to command line */
55 if (boot_args[0] < 64) {
56 /* called from hpux boot loader */
57 boot_command_line[0] = '\0';
58 } else {
59 strlcpy(boot_command_line, (char *)__va(boot_args[1]),
60 COMMAND_LINE_SIZE);
61
62#ifdef CONFIG_BLK_DEV_INITRD
63 if (boot_args[2] != 0) /* did palo pass us a ramdisk? */
64 {
65 initrd_start = (unsigned long)__va(boot_args[2]);
66 initrd_end = (unsigned long)__va(boot_args[3]);
67 }
68#endif
69 }
70
71 strcpy(command_line, boot_command_line);
72 *cmdline_p = command_line;
73}
74
75#ifdef CONFIG_PA11
76void __init dma_ops_init(void)
77{
78 switch (boot_cpu_data.cpu_type) {
79 case pcx:
80 /*
81 * We've got way too many dependencies on 1.1 semantics
82 * to support 1.0 boxes at this point.
83 */
84 panic( "PA-RISC Linux currently only supports machines that conform to\n"
85 "the PA-RISC 1.1 or 2.0 architecture specification.\n");
86
87 case pcxl2:
88 pa7300lc_init();
89 break;
90 default:
91 break;
92 }
93}
94#endif
95
96extern void collect_boot_cpu_data(void);
97
98void __init setup_arch(char **cmdline_p)
99{
100#ifdef CONFIG_64BIT
101 extern int parisc_narrow_firmware;
102#endif
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 pdc_console_init();
132
133#ifdef CONFIG_64BIT
134 if(parisc_narrow_firmware) {
135 printk(KERN_INFO "Kernel is using PDC in 32-bit mode.\n");
136 }
137#endif
138 setup_pdc();
139 setup_cmdline(cmdline_p);
140 collect_boot_cpu_data();
141 do_memory_inventory(); /* probe for physical memory */
142 parisc_cache_init();
143 paging_init();
144
145#ifdef CONFIG_CHASSIS_LCD_LED
146 /* initialize the LCD/LED after boot_cpu_data is available ! */
147 led_init(); /* LCD/LED initialization */
148#endif
149
150#ifdef CONFIG_PA11
151 dma_ops_init();
152#endif
153
154#if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
155 conswitchp = &dummy_con; /* we use do_take_over_console() later ! */
156#endif
157
158 clear_sched_clock_stable();
159}
160
161/*
162 * Display CPU info for all CPUs.
163 * for parisc this is in processor.c
164 */
165extern int show_cpuinfo (struct seq_file *m, void *v);
166
167static void *
168c_start (struct seq_file *m, loff_t *pos)
169{
170 /* Looks like the caller will call repeatedly until we return
171 * 0, signaling EOF perhaps. This could be used to sequence
172 * through CPUs for example. Since we print all cpu info in our
173 * show_cpuinfo() disregarding 'pos' (which I assume is 'v' above)
174 * we only allow for one "position". */
175 return ((long)*pos < 1) ? (void *)1 : NULL;
176}
177
178static void *
179c_next (struct seq_file *m, void *v, loff_t *pos)
180{
181 ++*pos;
182 return c_start(m, pos);
183}
184
185static void
186c_stop (struct seq_file *m, void *v)
187{
188}
189
190const struct seq_operations cpuinfo_op = {
191 .start = c_start,
192 .next = c_next,
193 .stop = c_stop,
194 .show = show_cpuinfo
195};
196
197static void __init parisc_proc_mkdir(void)
198{
199 /*
200 ** Can't call proc_mkdir() until after proc_root_init() has been
201 ** called by start_kernel(). In other words, this code can't
202 ** live in arch/.../setup.c because start_parisc() calls
203 ** start_kernel().
204 */
205 switch (boot_cpu_data.cpu_type) {
206 case pcxl:
207 case pcxl2:
208 if (NULL == proc_gsc_root)
209 {
210 proc_gsc_root = proc_mkdir("bus/gsc", NULL);
211 }
212 break;
213 case pcxt_:
214 case pcxu:
215 case pcxu_:
216 case pcxw:
217 case pcxw_:
218 case pcxw2:
219 if (NULL == proc_runway_root)
220 {
221 proc_runway_root = proc_mkdir("bus/runway", NULL);
222 }
223 break;
224 case mako:
225 case mako2:
226 if (NULL == proc_mckinley_root)
227 {
228 proc_mckinley_root = proc_mkdir("bus/mckinley", NULL);
229 }
230 break;
231 default:
232 /* FIXME: this was added to prevent the compiler
233 * complaining about missing pcx, pcxs and pcxt
234 * I'm assuming they have neither gsc nor runway */
235 break;
236 }
237}
238
239static struct resource central_bus = {
240 .name = "Central Bus",
241 .start = F_EXTEND(0xfff80000),
242 .end = F_EXTEND(0xfffaffff),
243 .flags = IORESOURCE_MEM,
244};
245
246static struct resource local_broadcast = {
247 .name = "Local Broadcast",
248 .start = F_EXTEND(0xfffb0000),
249 .end = F_EXTEND(0xfffdffff),
250 .flags = IORESOURCE_MEM,
251};
252
253static struct resource global_broadcast = {
254 .name = "Global Broadcast",
255 .start = F_EXTEND(0xfffe0000),
256 .end = F_EXTEND(0xffffffff),
257 .flags = IORESOURCE_MEM,
258};
259
260static int __init parisc_init_resources(void)
261{
262 int result;
263
264 result = request_resource(&iomem_resource, ¢ral_bus);
265 if (result < 0) {
266 printk(KERN_ERR
267 "%s: failed to claim %s address space!\n",
268 __FILE__, central_bus.name);
269 return result;
270 }
271
272 result = request_resource(&iomem_resource, &local_broadcast);
273 if (result < 0) {
274 printk(KERN_ERR
275 "%s: failed to claim %saddress space!\n",
276 __FILE__, local_broadcast.name);
277 return result;
278 }
279
280 result = request_resource(&iomem_resource, &global_broadcast);
281 if (result < 0) {
282 printk(KERN_ERR
283 "%s: failed to claim %s address space!\n",
284 __FILE__, global_broadcast.name);
285 return result;
286 }
287
288 return 0;
289}
290
291extern void gsc_init(void);
292extern void processor_init(void);
293extern void ccio_init(void);
294extern void hppb_init(void);
295extern void dino_init(void);
296extern void iosapic_init(void);
297extern void lba_init(void);
298extern void sba_init(void);
299extern void eisa_init(void);
300
301static int __init parisc_init(void)
302{
303 u32 osid = (OS_ID_LINUX << 16);
304
305 parisc_proc_mkdir();
306 parisc_init_resources();
307 do_device_inventory(); /* probe for hardware */
308
309 parisc_pdc_chassis_init();
310
311 /* set up a new led state on systems shipped LED State panel */
312 pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BSTART);
313
314 /* tell PDC we're Linux. Nevermind failure. */
315 pdc_stable_write(0x40, &osid, sizeof(osid));
316
317 /* start with known state */
318 flush_cache_all_local();
319 flush_tlb_all_local(NULL);
320
321 processor_init();
322#ifdef CONFIG_SMP
323 pr_info("CPU(s): %d out of %d %s at %d.%06d MHz online\n",
324 num_online_cpus(), num_present_cpus(),
325#else
326 pr_info("CPU(s): 1 x %s at %d.%06d MHz\n",
327#endif
328 boot_cpu_data.cpu_name,
329 boot_cpu_data.cpu_hz / 1000000,
330 boot_cpu_data.cpu_hz % 1000000 );
331
332#if defined(CONFIG_64BIT) && defined(CONFIG_SMP)
333 /* Don't serialize TLB flushes if we run on one CPU only. */
334 if (num_online_cpus() == 1)
335 pa_serialize_tlb_flushes = 0;
336#endif
337
338 apply_alternatives_all();
339 parisc_setup_cache_timing();
340
341 /* These are in a non-obvious order, will fix when we have an iotree */
342#if defined(CONFIG_IOSAPIC)
343 iosapic_init();
344#endif
345#if defined(CONFIG_IOMMU_SBA)
346 sba_init();
347#endif
348#if defined(CONFIG_PCI_LBA)
349 lba_init();
350#endif
351
352 /* CCIO before any potential subdevices */
353#if defined(CONFIG_IOMMU_CCIO)
354 ccio_init();
355#endif
356
357 /*
358 * Need to register Asp & Wax before the EISA adapters for the IRQ
359 * regions. EISA must come before PCI to be sure it gets IRQ region
360 * 0.
361 */
362#if defined(CONFIG_GSC_LASI) || defined(CONFIG_GSC_WAX)
363 gsc_init();
364#endif
365#ifdef CONFIG_EISA
366 eisa_init();
367#endif
368
369#if defined(CONFIG_HPPB)
370 hppb_init();
371#endif
372
373#if defined(CONFIG_GSC_DINO)
374 dino_init();
375#endif
376
377#ifdef CONFIG_CHASSIS_LCD_LED
378 register_led_regions(); /* register LED port info in procfs */
379#endif
380
381 return 0;
382}
383arch_initcall(parisc_init);
384
385void __init start_parisc(void)
386{
387 extern void early_trap_init(void);
388
389 int ret, cpunum;
390 struct pdc_coproc_cfg coproc_cfg;
391
392 /* check QEMU/SeaBIOS marker in PAGE0 */
393 running_on_qemu = (memcmp(&PAGE0->pad0, "SeaBIOS", 8) == 0);
394
395 cpunum = smp_processor_id();
396
397 init_cpu_topology();
398
399 set_firmware_width_unlocked();
400
401 ret = pdc_coproc_cfg_unlocked(&coproc_cfg);
402 if (ret >= 0 && coproc_cfg.ccr_functional) {
403 mtctl(coproc_cfg.ccr_functional, 10);
404
405 per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;
406 per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model;
407
408 asm volatile ("fstd %fr0,8(%sp)");
409 } else {
410 panic("must have an fpu to boot linux");
411 }
412
413 early_trap_init(); /* initialize checksum of fault_vector */
414
415 start_kernel();
416 // not reached
417}
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}