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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Early boot support code for BootX bootloader
4 *
5 * Copyright (C) 2005 Ben. Herrenschmidt (benh@kernel.crashing.org)
6 */
7
8#include <linux/kernel.h>
9#include <linux/string.h>
10#include <linux/init.h>
11#include <linux/of_fdt.h>
12#include <generated/utsrelease.h>
13#include <asm/sections.h>
14#include <asm/prom.h>
15#include <asm/page.h>
16#include <asm/bootx.h>
17#include <asm/btext.h>
18#include <asm/io.h>
19#include <asm/setup.h>
20
21#undef DEBUG
22#define SET_BOOT_BAT
23
24#ifdef DEBUG
25#define DBG(fmt...) do { bootx_printf(fmt); } while(0)
26#else
27#define DBG(fmt...) do { } while(0)
28#endif
29
30extern void __start(unsigned long r3, unsigned long r4, unsigned long r5);
31
32static unsigned long __initdata bootx_dt_strbase;
33static unsigned long __initdata bootx_dt_strend;
34static unsigned long __initdata bootx_node_chosen;
35static boot_infos_t * __initdata bootx_info;
36static char __initdata bootx_disp_path[256];
37
38/* Is boot-info compatible ? */
39#define BOOT_INFO_IS_COMPATIBLE(bi) \
40 ((bi)->compatible_version <= BOOT_INFO_VERSION)
41#define BOOT_INFO_IS_V2_COMPATIBLE(bi) ((bi)->version >= 2)
42#define BOOT_INFO_IS_V4_COMPATIBLE(bi) ((bi)->version >= 4)
43
44#ifdef CONFIG_BOOTX_TEXT
45static void __init bootx_printf(const char *format, ...)
46{
47 const char *p, *q, *s;
48 va_list args;
49 unsigned long v;
50
51 va_start(args, format);
52 for (p = format; *p != 0; p = q) {
53 for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q)
54 ;
55 if (q > p)
56 btext_drawtext(p, q - p);
57 if (*q == 0)
58 break;
59 if (*q == '\n') {
60 ++q;
61 btext_flushline();
62 btext_drawstring("\r\n");
63 btext_flushline();
64 continue;
65 }
66 ++q;
67 if (*q == 0)
68 break;
69 switch (*q) {
70 case 's':
71 ++q;
72 s = va_arg(args, const char *);
73 if (s == NULL)
74 s = "<NULL>";
75 btext_drawstring(s);
76 break;
77 case 'x':
78 ++q;
79 v = va_arg(args, unsigned long);
80 btext_drawhex(v);
81 break;
82 }
83 }
84 va_end(args);
85}
86#else /* CONFIG_BOOTX_TEXT */
87static void __init bootx_printf(const char *format, ...) {}
88#endif /* CONFIG_BOOTX_TEXT */
89
90static void * __init bootx_early_getprop(unsigned long base,
91 unsigned long node,
92 char *prop)
93{
94 struct bootx_dt_node *np = (struct bootx_dt_node *)(base + node);
95 u32 *ppp = &np->properties;
96
97 while(*ppp) {
98 struct bootx_dt_prop *pp =
99 (struct bootx_dt_prop *)(base + *ppp);
100
101 if (strcmp((char *)((unsigned long)pp->name + base),
102 prop) == 0) {
103 return (void *)((unsigned long)pp->value + base);
104 }
105 ppp = &pp->next;
106 }
107 return NULL;
108}
109
110#define dt_push_token(token, mem) \
111 do { \
112 *(mem) = ALIGN(*(mem),4); \
113 *((u32 *)*(mem)) = token; \
114 *(mem) += 4; \
115 } while(0)
116
117static unsigned long __init bootx_dt_find_string(char *str)
118{
119 char *s, *os;
120
121 s = os = (char *)bootx_dt_strbase;
122 s += 4;
123 while (s < (char *)bootx_dt_strend) {
124 if (strcmp(s, str) == 0)
125 return s - os;
126 s += strlen(s) + 1;
127 }
128 return 0;
129}
130
131static void __init bootx_dt_add_prop(char *name, void *data, int size,
132 unsigned long *mem_end)
133{
134 unsigned long soff = bootx_dt_find_string(name);
135 if (data == NULL)
136 size = 0;
137 if (soff == 0) {
138 bootx_printf("WARNING: Can't find string index for <%s>\n",
139 name);
140 return;
141 }
142 if (size > 0x20000) {
143 bootx_printf("WARNING: ignoring large property ");
144 bootx_printf("%s length 0x%x\n", name, size);
145 return;
146 }
147 dt_push_token(OF_DT_PROP, mem_end);
148 dt_push_token(size, mem_end);
149 dt_push_token(soff, mem_end);
150
151 /* push property content */
152 if (size && data) {
153 memcpy((void *)*mem_end, data, size);
154 *mem_end = ALIGN(*mem_end + size, 4);
155 }
156}
157
158static void __init bootx_add_chosen_props(unsigned long base,
159 unsigned long *mem_end)
160{
161 u32 val;
162
163 bootx_dt_add_prop("linux,bootx", NULL, 0, mem_end);
164
165 if (bootx_info->kernelParamsOffset) {
166 char *args = (char *)((unsigned long)bootx_info) +
167 bootx_info->kernelParamsOffset;
168 bootx_dt_add_prop("bootargs", args, strlen(args) + 1, mem_end);
169 }
170 if (bootx_info->ramDisk) {
171 val = ((unsigned long)bootx_info) + bootx_info->ramDisk;
172 bootx_dt_add_prop("linux,initrd-start", &val, 4, mem_end);
173 val += bootx_info->ramDiskSize;
174 bootx_dt_add_prop("linux,initrd-end", &val, 4, mem_end);
175 }
176 if (strlen(bootx_disp_path))
177 bootx_dt_add_prop("linux,stdout-path", bootx_disp_path,
178 strlen(bootx_disp_path) + 1, mem_end);
179}
180
181static void __init bootx_add_display_props(unsigned long base,
182 unsigned long *mem_end,
183 int has_real_node)
184{
185 boot_infos_t *bi = bootx_info;
186 u32 tmp;
187
188 if (has_real_node) {
189 bootx_dt_add_prop("linux,boot-display", NULL, 0, mem_end);
190 bootx_dt_add_prop("linux,opened", NULL, 0, mem_end);
191 } else
192 bootx_dt_add_prop("linux,bootx-noscreen", NULL, 0, mem_end);
193
194 tmp = bi->dispDeviceDepth;
195 bootx_dt_add_prop("linux,bootx-depth", &tmp, 4, mem_end);
196 tmp = bi->dispDeviceRect[2] - bi->dispDeviceRect[0];
197 bootx_dt_add_prop("linux,bootx-width", &tmp, 4, mem_end);
198 tmp = bi->dispDeviceRect[3] - bi->dispDeviceRect[1];
199 bootx_dt_add_prop("linux,bootx-height", &tmp, 4, mem_end);
200 tmp = bi->dispDeviceRowBytes;
201 bootx_dt_add_prop("linux,bootx-linebytes", &tmp, 4, mem_end);
202 tmp = (u32)bi->dispDeviceBase;
203 if (tmp == 0)
204 tmp = (u32)bi->logicalDisplayBase;
205 tmp += bi->dispDeviceRect[1] * bi->dispDeviceRowBytes;
206 tmp += bi->dispDeviceRect[0] * ((bi->dispDeviceDepth + 7) / 8);
207 bootx_dt_add_prop("linux,bootx-addr", &tmp, 4, mem_end);
208}
209
210static void __init bootx_dt_add_string(char *s, unsigned long *mem_end)
211{
212 unsigned int l = strlen(s) + 1;
213 memcpy((void *)*mem_end, s, l);
214 bootx_dt_strend = *mem_end = *mem_end + l;
215}
216
217static void __init bootx_scan_dt_build_strings(unsigned long base,
218 unsigned long node,
219 unsigned long *mem_end)
220{
221 struct bootx_dt_node *np = (struct bootx_dt_node *)(base + node);
222 u32 *cpp, *ppp = &np->properties;
223 unsigned long soff;
224 char *namep;
225
226 /* Keep refs to known nodes */
227 namep = np->full_name ? (char *)(base + np->full_name) : NULL;
228 if (namep == NULL) {
229 bootx_printf("Node without a full name !\n");
230 namep = "";
231 }
232 DBG("* strings: %s\n", namep);
233
234 if (!strcmp(namep, "/chosen")) {
235 DBG(" detected /chosen ! adding properties names !\n");
236 bootx_dt_add_string("linux,bootx", mem_end);
237 bootx_dt_add_string("linux,stdout-path", mem_end);
238 bootx_dt_add_string("linux,initrd-start", mem_end);
239 bootx_dt_add_string("linux,initrd-end", mem_end);
240 bootx_dt_add_string("bootargs", mem_end);
241 bootx_node_chosen = node;
242 }
243 if (node == bootx_info->dispDeviceRegEntryOffset) {
244 DBG(" detected display ! adding properties names !\n");
245 bootx_dt_add_string("linux,boot-display", mem_end);
246 bootx_dt_add_string("linux,opened", mem_end);
247 strscpy(bootx_disp_path, namep, sizeof(bootx_disp_path));
248 }
249
250 /* get and store all property names */
251 while (*ppp) {
252 struct bootx_dt_prop *pp =
253 (struct bootx_dt_prop *)(base + *ppp);
254
255 namep = pp->name ? (char *)(base + pp->name) : NULL;
256 if (namep == NULL || strcmp(namep, "name") == 0)
257 goto next;
258 /* get/create string entry */
259 soff = bootx_dt_find_string(namep);
260 if (soff == 0)
261 bootx_dt_add_string(namep, mem_end);
262 next:
263 ppp = &pp->next;
264 }
265
266 /* do all our children */
267 cpp = &np->child;
268 while(*cpp) {
269 np = (struct bootx_dt_node *)(base + *cpp);
270 bootx_scan_dt_build_strings(base, *cpp, mem_end);
271 cpp = &np->sibling;
272 }
273}
274
275static void __init bootx_scan_dt_build_struct(unsigned long base,
276 unsigned long node,
277 unsigned long *mem_end)
278{
279 struct bootx_dt_node *np = (struct bootx_dt_node *)(base + node);
280 u32 *cpp, *ppp = &np->properties;
281 char *namep, *p, *ep, *lp;
282 int l;
283
284 dt_push_token(OF_DT_BEGIN_NODE, mem_end);
285
286 /* get the node's full name */
287 namep = np->full_name ? (char *)(base + np->full_name) : NULL;
288 if (namep == NULL)
289 namep = "";
290 l = strlen(namep);
291
292 DBG("* struct: %s\n", namep);
293
294 /* Fixup an Apple bug where they have bogus \0 chars in the
295 * middle of the path in some properties, and extract
296 * the unit name (everything after the last '/').
297 */
298 memcpy((void *)*mem_end, namep, l + 1);
299 namep = (char *)*mem_end;
300 for (lp = p = namep, ep = namep + l; p < ep; p++) {
301 if (*p == '/')
302 lp = namep;
303 else if (*p != 0)
304 *lp++ = *p;
305 }
306 *lp = 0;
307 *mem_end = ALIGN((unsigned long)lp + 1, 4);
308
309 /* get and store all properties */
310 while (*ppp) {
311 struct bootx_dt_prop *pp =
312 (struct bootx_dt_prop *)(base + *ppp);
313
314 namep = pp->name ? (char *)(base + pp->name) : NULL;
315 /* Skip "name" */
316 if (namep == NULL || !strcmp(namep, "name"))
317 goto next;
318 /* Skip "bootargs" in /chosen too as we replace it */
319 if (node == bootx_node_chosen && !strcmp(namep, "bootargs"))
320 goto next;
321
322 /* push property head */
323 bootx_dt_add_prop(namep,
324 pp->value ? (void *)(base + pp->value): NULL,
325 pp->length, mem_end);
326 next:
327 ppp = &pp->next;
328 }
329
330 if (node == bootx_node_chosen) {
331 bootx_add_chosen_props(base, mem_end);
332 if (bootx_info->dispDeviceRegEntryOffset == 0)
333 bootx_add_display_props(base, mem_end, 0);
334 }
335 else if (node == bootx_info->dispDeviceRegEntryOffset)
336 bootx_add_display_props(base, mem_end, 1);
337
338 /* do all our children */
339 cpp = &np->child;
340 while(*cpp) {
341 np = (struct bootx_dt_node *)(base + *cpp);
342 bootx_scan_dt_build_struct(base, *cpp, mem_end);
343 cpp = &np->sibling;
344 }
345
346 dt_push_token(OF_DT_END_NODE, mem_end);
347}
348
349static unsigned long __init bootx_flatten_dt(unsigned long start)
350{
351 boot_infos_t *bi = bootx_info;
352 unsigned long mem_start, mem_end;
353 struct boot_param_header *hdr;
354 unsigned long base;
355 u64 *rsvmap;
356
357 /* Start using memory after the big blob passed by BootX, get
358 * some space for the header
359 */
360 mem_start = mem_end = ALIGN(((unsigned long)bi) + start, 4);
361 DBG("Boot params header at: %x\n", mem_start);
362 hdr = (struct boot_param_header *)mem_start;
363 mem_end += sizeof(struct boot_param_header);
364 rsvmap = (u64 *)(ALIGN(mem_end, 8));
365 hdr->off_mem_rsvmap = ((unsigned long)rsvmap) - mem_start;
366 mem_end = ((unsigned long)rsvmap) + 8 * sizeof(u64);
367
368 /* Get base of tree */
369 base = ((unsigned long)bi) + bi->deviceTreeOffset;
370
371 /* Build string array */
372 DBG("Building string array at: %x\n", mem_end);
373 DBG("Device Tree Base=%x\n", base);
374 bootx_dt_strbase = mem_end;
375 mem_end += 4;
376 bootx_dt_strend = mem_end;
377 bootx_scan_dt_build_strings(base, 4, &mem_end);
378 /* Add some strings */
379 bootx_dt_add_string("linux,bootx-noscreen", &mem_end);
380 bootx_dt_add_string("linux,bootx-depth", &mem_end);
381 bootx_dt_add_string("linux,bootx-width", &mem_end);
382 bootx_dt_add_string("linux,bootx-height", &mem_end);
383 bootx_dt_add_string("linux,bootx-linebytes", &mem_end);
384 bootx_dt_add_string("linux,bootx-addr", &mem_end);
385 /* Wrap up strings */
386 hdr->off_dt_strings = bootx_dt_strbase - mem_start;
387 hdr->dt_strings_size = bootx_dt_strend - bootx_dt_strbase;
388
389 /* Build structure */
390 mem_end = ALIGN(mem_end, 16);
391 DBG("Building device tree structure at: %x\n", mem_end);
392 hdr->off_dt_struct = mem_end - mem_start;
393 bootx_scan_dt_build_struct(base, 4, &mem_end);
394 dt_push_token(OF_DT_END, &mem_end);
395
396 /* Finish header */
397 hdr->boot_cpuid_phys = 0;
398 hdr->magic = OF_DT_HEADER;
399 hdr->totalsize = mem_end - mem_start;
400 hdr->version = OF_DT_VERSION;
401 /* Version 16 is not backward compatible */
402 hdr->last_comp_version = 0x10;
403
404 /* Reserve the whole thing and copy the reserve map in, we
405 * also bump mem_reserve_cnt to cause further reservations to
406 * fail since it's too late.
407 */
408 mem_end = ALIGN(mem_end, PAGE_SIZE);
409 DBG("End of boot params: %x\n", mem_end);
410 rsvmap[0] = mem_start;
411 rsvmap[1] = mem_end;
412 if (bootx_info->ramDisk) {
413 rsvmap[2] = ((unsigned long)bootx_info) + bootx_info->ramDisk;
414 rsvmap[3] = rsvmap[2] + bootx_info->ramDiskSize;
415 rsvmap[4] = 0;
416 rsvmap[5] = 0;
417 } else {
418 rsvmap[2] = 0;
419 rsvmap[3] = 0;
420 }
421
422 return (unsigned long)hdr;
423}
424
425
426#ifdef CONFIG_BOOTX_TEXT
427static void __init btext_welcome(boot_infos_t *bi)
428{
429 unsigned long flags;
430 unsigned long pvr;
431
432 bootx_printf("Welcome to Linux, kernel " UTS_RELEASE "\n");
433 bootx_printf("\nlinked at : 0x%x", KERNELBASE);
434 bootx_printf("\nframe buffer at : 0x%x", bi->dispDeviceBase);
435 bootx_printf(" (phys), 0x%x", bi->logicalDisplayBase);
436 bootx_printf(" (log)");
437 bootx_printf("\nklimit : 0x%x",(unsigned long)_end);
438 bootx_printf("\nboot_info at : 0x%x", bi);
439 __asm__ __volatile__ ("mfmsr %0" : "=r" (flags));
440 bootx_printf("\nMSR : 0x%x", flags);
441 __asm__ __volatile__ ("mfspr %0, 287" : "=r" (pvr));
442 bootx_printf("\nPVR : 0x%x", pvr);
443 pvr >>= 16;
444 if (pvr > 1) {
445 __asm__ __volatile__ ("mfspr %0, 1008" : "=r" (flags));
446 bootx_printf("\nHID0 : 0x%x", flags);
447 }
448 if (pvr == 8 || pvr == 12 || pvr == 0x800c) {
449 __asm__ __volatile__ ("mfspr %0, 1019" : "=r" (flags));
450 bootx_printf("\nICTC : 0x%x", flags);
451 }
452#ifdef DEBUG
453 bootx_printf("\n\n");
454 bootx_printf("bi->deviceTreeOffset : 0x%x\n",
455 bi->deviceTreeOffset);
456 bootx_printf("bi->deviceTreeSize : 0x%x\n",
457 bi->deviceTreeSize);
458#endif
459 bootx_printf("\n\n");
460}
461#endif /* CONFIG_BOOTX_TEXT */
462
463void __init bootx_init(unsigned long r3, unsigned long r4)
464{
465 boot_infos_t *bi = (boot_infos_t *) r4;
466 unsigned long hdr;
467 unsigned long space;
468 unsigned long ptr;
469 char *model;
470 unsigned long offset = reloc_offset();
471
472 reloc_got2(offset);
473
474 bootx_info = bi;
475
476 /* We haven't cleared any bss at this point, make sure
477 * what we need is initialized
478 */
479 bootx_dt_strbase = bootx_dt_strend = 0;
480 bootx_node_chosen = 0;
481 bootx_disp_path[0] = 0;
482
483 if (!BOOT_INFO_IS_V2_COMPATIBLE(bi))
484 bi->logicalDisplayBase = bi->dispDeviceBase;
485
486 /* Fixup depth 16 -> 15 as that's what MacOS calls 16bpp */
487 if (bi->dispDeviceDepth == 16)
488 bi->dispDeviceDepth = 15;
489
490
491#ifdef CONFIG_BOOTX_TEXT
492 ptr = (unsigned long)bi->logicalDisplayBase;
493 ptr += bi->dispDeviceRect[1] * bi->dispDeviceRowBytes;
494 ptr += bi->dispDeviceRect[0] * ((bi->dispDeviceDepth + 7) / 8);
495 btext_setup_display(bi->dispDeviceRect[2] - bi->dispDeviceRect[0],
496 bi->dispDeviceRect[3] - bi->dispDeviceRect[1],
497 bi->dispDeviceDepth, bi->dispDeviceRowBytes,
498 (unsigned long)bi->logicalDisplayBase);
499 btext_clearscreen();
500 btext_flushscreen();
501#endif /* CONFIG_BOOTX_TEXT */
502
503 /*
504 * Test if boot-info is compatible. Done only in config
505 * CONFIG_BOOTX_TEXT since there is nothing much we can do
506 * with an incompatible version, except display a message
507 * and eventually hang the processor...
508 *
509 * I'll try to keep enough of boot-info compatible in the
510 * future to always allow display of this message;
511 */
512 if (!BOOT_INFO_IS_COMPATIBLE(bi)) {
513 bootx_printf(" !!! WARNING - Incompatible version"
514 " of BootX !!!\n\n\n");
515 for (;;)
516 ;
517 }
518 if (bi->architecture != BOOT_ARCH_PCI) {
519 bootx_printf(" !!! WARNING - Unsupported machine"
520 " architecture !\n");
521 for (;;)
522 ;
523 }
524
525#ifdef CONFIG_BOOTX_TEXT
526 btext_welcome(bi);
527#endif
528
529 /* New BootX enters kernel with MMU off, i/os are not allowed
530 * here. This hack will have been done by the boostrap anyway.
531 */
532 if (bi->version < 4) {
533 /*
534 * XXX If this is an iMac, turn off the USB controller.
535 */
536 model = (char *) bootx_early_getprop(r4 + bi->deviceTreeOffset,
537 4, "model");
538 if (model
539 && (strcmp(model, "iMac,1") == 0
540 || strcmp(model, "PowerMac1,1") == 0)) {
541 bootx_printf("iMac,1 detected, shutting down USB\n");
542 out_le32((unsigned __iomem *)0x80880008, 1); /* XXX */
543 }
544 }
545
546 /* Get a pointer that points above the device tree, args, ramdisk,
547 * etc... to use for generating the flattened tree
548 */
549 if (bi->version < 5) {
550 space = bi->deviceTreeOffset + bi->deviceTreeSize;
551 if (bi->ramDisk >= space)
552 space = bi->ramDisk + bi->ramDiskSize;
553 } else
554 space = bi->totalParamsSize;
555
556 bootx_printf("Total space used by parameters & ramdisk: 0x%x\n", space);
557
558 /* New BootX will have flushed all TLBs and enters kernel with
559 * MMU switched OFF, so this should not be useful anymore.
560 */
561 if (bi->version < 4) {
562 unsigned long x __maybe_unused;
563
564 bootx_printf("Touching pages...\n");
565
566 /*
567 * Touch each page to make sure the PTEs for them
568 * are in the hash table - the aim is to try to avoid
569 * getting DSI exceptions while copying the kernel image.
570 */
571 for (ptr = ((unsigned long) &_stext) & PAGE_MASK;
572 ptr < (unsigned long)bi + space; ptr += PAGE_SIZE)
573 x = *(volatile unsigned long *)ptr;
574 }
575
576 /* Ok, now we need to generate a flattened device-tree to pass
577 * to the kernel
578 */
579 bootx_printf("Preparing boot params...\n");
580
581 hdr = bootx_flatten_dt(space);
582
583#ifdef CONFIG_BOOTX_TEXT
584#ifdef SET_BOOT_BAT
585 bootx_printf("Preparing BAT...\n");
586 btext_prepare_BAT();
587#else
588 btext_unmap();
589#endif
590#endif
591
592 reloc_got2(-offset);
593
594 __start(hdr, KERNELBASE + offset, 0);
595}
1/*
2 * Early boot support code for BootX bootloader
3 *
4 * Copyright (C) 2005 Ben. Herrenschmidt (benh@kernel.crashing.org)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
12#include <linux/kernel.h>
13#include <linux/string.h>
14#include <linux/init.h>
15#include <generated/utsrelease.h>
16#include <asm/sections.h>
17#include <asm/prom.h>
18#include <asm/page.h>
19#include <asm/bootx.h>
20#include <asm/btext.h>
21#include <asm/io.h>
22
23#undef DEBUG
24#define SET_BOOT_BAT
25
26#ifdef DEBUG
27#define DBG(fmt...) do { bootx_printf(fmt); } while(0)
28#else
29#define DBG(fmt...) do { } while(0)
30#endif
31
32extern void __start(unsigned long r3, unsigned long r4, unsigned long r5);
33
34static unsigned long __initdata bootx_dt_strbase;
35static unsigned long __initdata bootx_dt_strend;
36static unsigned long __initdata bootx_node_chosen;
37static boot_infos_t * __initdata bootx_info;
38static char __initdata bootx_disp_path[256];
39
40/* Is boot-info compatible ? */
41#define BOOT_INFO_IS_COMPATIBLE(bi) \
42 ((bi)->compatible_version <= BOOT_INFO_VERSION)
43#define BOOT_INFO_IS_V2_COMPATIBLE(bi) ((bi)->version >= 2)
44#define BOOT_INFO_IS_V4_COMPATIBLE(bi) ((bi)->version >= 4)
45
46#ifdef CONFIG_BOOTX_TEXT
47static void __init bootx_printf(const char *format, ...)
48{
49 const char *p, *q, *s;
50 va_list args;
51 unsigned long v;
52
53 va_start(args, format);
54 for (p = format; *p != 0; p = q) {
55 for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q)
56 ;
57 if (q > p)
58 btext_drawtext(p, q - p);
59 if (*q == 0)
60 break;
61 if (*q == '\n') {
62 ++q;
63 btext_flushline();
64 btext_drawstring("\r\n");
65 btext_flushline();
66 continue;
67 }
68 ++q;
69 if (*q == 0)
70 break;
71 switch (*q) {
72 case 's':
73 ++q;
74 s = va_arg(args, const char *);
75 if (s == NULL)
76 s = "<NULL>";
77 btext_drawstring(s);
78 break;
79 case 'x':
80 ++q;
81 v = va_arg(args, unsigned long);
82 btext_drawhex(v);
83 break;
84 }
85 }
86}
87#else /* CONFIG_BOOTX_TEXT */
88static void __init bootx_printf(const char *format, ...) {}
89#endif /* CONFIG_BOOTX_TEXT */
90
91static void * __init bootx_early_getprop(unsigned long base,
92 unsigned long node,
93 char *prop)
94{
95 struct bootx_dt_node *np = (struct bootx_dt_node *)(base + node);
96 u32 *ppp = &np->properties;
97
98 while(*ppp) {
99 struct bootx_dt_prop *pp =
100 (struct bootx_dt_prop *)(base + *ppp);
101
102 if (strcmp((char *)((unsigned long)pp->name + base),
103 prop) == 0) {
104 return (void *)((unsigned long)pp->value + base);
105 }
106 ppp = &pp->next;
107 }
108 return NULL;
109}
110
111#define dt_push_token(token, mem) \
112 do { \
113 *(mem) = _ALIGN_UP(*(mem),4); \
114 *((u32 *)*(mem)) = token; \
115 *(mem) += 4; \
116 } while(0)
117
118static unsigned long __init bootx_dt_find_string(char *str)
119{
120 char *s, *os;
121
122 s = os = (char *)bootx_dt_strbase;
123 s += 4;
124 while (s < (char *)bootx_dt_strend) {
125 if (strcmp(s, str) == 0)
126 return s - os;
127 s += strlen(s) + 1;
128 }
129 return 0;
130}
131
132static void __init bootx_dt_add_prop(char *name, void *data, int size,
133 unsigned long *mem_end)
134{
135 unsigned long soff = bootx_dt_find_string(name);
136 if (data == NULL)
137 size = 0;
138 if (soff == 0) {
139 bootx_printf("WARNING: Can't find string index for <%s>\n",
140 name);
141 return;
142 }
143 if (size > 0x20000) {
144 bootx_printf("WARNING: ignoring large property ");
145 bootx_printf("%s length 0x%x\n", name, size);
146 return;
147 }
148 dt_push_token(OF_DT_PROP, mem_end);
149 dt_push_token(size, mem_end);
150 dt_push_token(soff, mem_end);
151
152 /* push property content */
153 if (size && data) {
154 memcpy((void *)*mem_end, data, size);
155 *mem_end = _ALIGN_UP(*mem_end + size, 4);
156 }
157}
158
159static void __init bootx_add_chosen_props(unsigned long base,
160 unsigned long *mem_end)
161{
162 u32 val;
163
164 bootx_dt_add_prop("linux,bootx", NULL, 0, mem_end);
165
166 if (bootx_info->kernelParamsOffset) {
167 char *args = (char *)((unsigned long)bootx_info) +
168 bootx_info->kernelParamsOffset;
169 bootx_dt_add_prop("bootargs", args, strlen(args) + 1, mem_end);
170 }
171 if (bootx_info->ramDisk) {
172 val = ((unsigned long)bootx_info) + bootx_info->ramDisk;
173 bootx_dt_add_prop("linux,initrd-start", &val, 4, mem_end);
174 val += bootx_info->ramDiskSize;
175 bootx_dt_add_prop("linux,initrd-end", &val, 4, mem_end);
176 }
177 if (strlen(bootx_disp_path))
178 bootx_dt_add_prop("linux,stdout-path", bootx_disp_path,
179 strlen(bootx_disp_path) + 1, mem_end);
180}
181
182static void __init bootx_add_display_props(unsigned long base,
183 unsigned long *mem_end,
184 int has_real_node)
185{
186 boot_infos_t *bi = bootx_info;
187 u32 tmp;
188
189 if (has_real_node) {
190 bootx_dt_add_prop("linux,boot-display", NULL, 0, mem_end);
191 bootx_dt_add_prop("linux,opened", NULL, 0, mem_end);
192 } else
193 bootx_dt_add_prop("linux,bootx-noscreen", NULL, 0, mem_end);
194
195 tmp = bi->dispDeviceDepth;
196 bootx_dt_add_prop("linux,bootx-depth", &tmp, 4, mem_end);
197 tmp = bi->dispDeviceRect[2] - bi->dispDeviceRect[0];
198 bootx_dt_add_prop("linux,bootx-width", &tmp, 4, mem_end);
199 tmp = bi->dispDeviceRect[3] - bi->dispDeviceRect[1];
200 bootx_dt_add_prop("linux,bootx-height", &tmp, 4, mem_end);
201 tmp = bi->dispDeviceRowBytes;
202 bootx_dt_add_prop("linux,bootx-linebytes", &tmp, 4, mem_end);
203 tmp = (u32)bi->dispDeviceBase;
204 if (tmp == 0)
205 tmp = (u32)bi->logicalDisplayBase;
206 tmp += bi->dispDeviceRect[1] * bi->dispDeviceRowBytes;
207 tmp += bi->dispDeviceRect[0] * ((bi->dispDeviceDepth + 7) / 8);
208 bootx_dt_add_prop("linux,bootx-addr", &tmp, 4, mem_end);
209}
210
211static void __init bootx_dt_add_string(char *s, unsigned long *mem_end)
212{
213 unsigned int l = strlen(s) + 1;
214 memcpy((void *)*mem_end, s, l);
215 bootx_dt_strend = *mem_end = *mem_end + l;
216}
217
218static void __init bootx_scan_dt_build_strings(unsigned long base,
219 unsigned long node,
220 unsigned long *mem_end)
221{
222 struct bootx_dt_node *np = (struct bootx_dt_node *)(base + node);
223 u32 *cpp, *ppp = &np->properties;
224 unsigned long soff;
225 char *namep;
226
227 /* Keep refs to known nodes */
228 namep = np->full_name ? (char *)(base + np->full_name) : NULL;
229 if (namep == NULL) {
230 bootx_printf("Node without a full name !\n");
231 namep = "";
232 }
233 DBG("* strings: %s\n", namep);
234
235 if (!strcmp(namep, "/chosen")) {
236 DBG(" detected /chosen ! adding properties names !\n");
237 bootx_dt_add_string("linux,bootx", mem_end);
238 bootx_dt_add_string("linux,stdout-path", mem_end);
239 bootx_dt_add_string("linux,initrd-start", mem_end);
240 bootx_dt_add_string("linux,initrd-end", mem_end);
241 bootx_dt_add_string("bootargs", mem_end);
242 bootx_node_chosen = node;
243 }
244 if (node == bootx_info->dispDeviceRegEntryOffset) {
245 DBG(" detected display ! adding properties names !\n");
246 bootx_dt_add_string("linux,boot-display", mem_end);
247 bootx_dt_add_string("linux,opened", mem_end);
248 strncpy(bootx_disp_path, namep, 255);
249 }
250
251 /* get and store all property names */
252 while (*ppp) {
253 struct bootx_dt_prop *pp =
254 (struct bootx_dt_prop *)(base + *ppp);
255
256 namep = pp->name ? (char *)(base + pp->name) : NULL;
257 if (namep == NULL || strcmp(namep, "name") == 0)
258 goto next;
259 /* get/create string entry */
260 soff = bootx_dt_find_string(namep);
261 if (soff == 0)
262 bootx_dt_add_string(namep, mem_end);
263 next:
264 ppp = &pp->next;
265 }
266
267 /* do all our children */
268 cpp = &np->child;
269 while(*cpp) {
270 np = (struct bootx_dt_node *)(base + *cpp);
271 bootx_scan_dt_build_strings(base, *cpp, mem_end);
272 cpp = &np->sibling;
273 }
274}
275
276static void __init bootx_scan_dt_build_struct(unsigned long base,
277 unsigned long node,
278 unsigned long *mem_end)
279{
280 struct bootx_dt_node *np = (struct bootx_dt_node *)(base + node);
281 u32 *cpp, *ppp = &np->properties;
282 char *namep, *p, *ep, *lp;
283 int l;
284
285 dt_push_token(OF_DT_BEGIN_NODE, mem_end);
286
287 /* get the node's full name */
288 namep = np->full_name ? (char *)(base + np->full_name) : NULL;
289 if (namep == NULL)
290 namep = "";
291 l = strlen(namep);
292
293 DBG("* struct: %s\n", namep);
294
295 /* Fixup an Apple bug where they have bogus \0 chars in the
296 * middle of the path in some properties, and extract
297 * the unit name (everything after the last '/').
298 */
299 memcpy((void *)*mem_end, namep, l + 1);
300 namep = (char *)*mem_end;
301 for (lp = p = namep, ep = namep + l; p < ep; p++) {
302 if (*p == '/')
303 lp = namep;
304 else if (*p != 0)
305 *lp++ = *p;
306 }
307 *lp = 0;
308 *mem_end = _ALIGN_UP((unsigned long)lp + 1, 4);
309
310 /* get and store all properties */
311 while (*ppp) {
312 struct bootx_dt_prop *pp =
313 (struct bootx_dt_prop *)(base + *ppp);
314
315 namep = pp->name ? (char *)(base + pp->name) : NULL;
316 /* Skip "name" */
317 if (namep == NULL || !strcmp(namep, "name"))
318 goto next;
319 /* Skip "bootargs" in /chosen too as we replace it */
320 if (node == bootx_node_chosen && !strcmp(namep, "bootargs"))
321 goto next;
322
323 /* push property head */
324 bootx_dt_add_prop(namep,
325 pp->value ? (void *)(base + pp->value): NULL,
326 pp->length, mem_end);
327 next:
328 ppp = &pp->next;
329 }
330
331 if (node == bootx_node_chosen) {
332 bootx_add_chosen_props(base, mem_end);
333 if (bootx_info->dispDeviceRegEntryOffset == 0)
334 bootx_add_display_props(base, mem_end, 0);
335 }
336 else if (node == bootx_info->dispDeviceRegEntryOffset)
337 bootx_add_display_props(base, mem_end, 1);
338
339 /* do all our children */
340 cpp = &np->child;
341 while(*cpp) {
342 np = (struct bootx_dt_node *)(base + *cpp);
343 bootx_scan_dt_build_struct(base, *cpp, mem_end);
344 cpp = &np->sibling;
345 }
346
347 dt_push_token(OF_DT_END_NODE, mem_end);
348}
349
350static unsigned long __init bootx_flatten_dt(unsigned long start)
351{
352 boot_infos_t *bi = bootx_info;
353 unsigned long mem_start, mem_end;
354 struct boot_param_header *hdr;
355 unsigned long base;
356 u64 *rsvmap;
357
358 /* Start using memory after the big blob passed by BootX, get
359 * some space for the header
360 */
361 mem_start = mem_end = _ALIGN_UP(((unsigned long)bi) + start, 4);
362 DBG("Boot params header at: %x\n", mem_start);
363 hdr = (struct boot_param_header *)mem_start;
364 mem_end += sizeof(struct boot_param_header);
365 rsvmap = (u64 *)(_ALIGN_UP(mem_end, 8));
366 hdr->off_mem_rsvmap = ((unsigned long)rsvmap) - mem_start;
367 mem_end = ((unsigned long)rsvmap) + 8 * sizeof(u64);
368
369 /* Get base of tree */
370 base = ((unsigned long)bi) + bi->deviceTreeOffset;
371
372 /* Build string array */
373 DBG("Building string array at: %x\n", mem_end);
374 DBG("Device Tree Base=%x\n", base);
375 bootx_dt_strbase = mem_end;
376 mem_end += 4;
377 bootx_dt_strend = mem_end;
378 bootx_scan_dt_build_strings(base, 4, &mem_end);
379 /* Add some strings */
380 bootx_dt_add_string("linux,bootx-noscreen", &mem_end);
381 bootx_dt_add_string("linux,bootx-depth", &mem_end);
382 bootx_dt_add_string("linux,bootx-width", &mem_end);
383 bootx_dt_add_string("linux,bootx-height", &mem_end);
384 bootx_dt_add_string("linux,bootx-linebytes", &mem_end);
385 bootx_dt_add_string("linux,bootx-addr", &mem_end);
386 /* Wrap up strings */
387 hdr->off_dt_strings = bootx_dt_strbase - mem_start;
388 hdr->dt_strings_size = bootx_dt_strend - bootx_dt_strbase;
389
390 /* Build structure */
391 mem_end = _ALIGN(mem_end, 16);
392 DBG("Building device tree structure at: %x\n", mem_end);
393 hdr->off_dt_struct = mem_end - mem_start;
394 bootx_scan_dt_build_struct(base, 4, &mem_end);
395 dt_push_token(OF_DT_END, &mem_end);
396
397 /* Finish header */
398 hdr->boot_cpuid_phys = 0;
399 hdr->magic = OF_DT_HEADER;
400 hdr->totalsize = mem_end - mem_start;
401 hdr->version = OF_DT_VERSION;
402 /* Version 16 is not backward compatible */
403 hdr->last_comp_version = 0x10;
404
405 /* Reserve the whole thing and copy the reserve map in, we
406 * also bump mem_reserve_cnt to cause further reservations to
407 * fail since it's too late.
408 */
409 mem_end = _ALIGN(mem_end, PAGE_SIZE);
410 DBG("End of boot params: %x\n", mem_end);
411 rsvmap[0] = mem_start;
412 rsvmap[1] = mem_end;
413 if (bootx_info->ramDisk) {
414 rsvmap[2] = ((unsigned long)bootx_info) + bootx_info->ramDisk;
415 rsvmap[3] = rsvmap[2] + bootx_info->ramDiskSize;
416 rsvmap[4] = 0;
417 rsvmap[5] = 0;
418 } else {
419 rsvmap[2] = 0;
420 rsvmap[3] = 0;
421 }
422
423 return (unsigned long)hdr;
424}
425
426
427#ifdef CONFIG_BOOTX_TEXT
428static void __init btext_welcome(boot_infos_t *bi)
429{
430 unsigned long flags;
431 unsigned long pvr;
432
433 bootx_printf("Welcome to Linux, kernel " UTS_RELEASE "\n");
434 bootx_printf("\nlinked at : 0x%x", KERNELBASE);
435 bootx_printf("\nframe buffer at : 0x%x", bi->dispDeviceBase);
436 bootx_printf(" (phys), 0x%x", bi->logicalDisplayBase);
437 bootx_printf(" (log)");
438 bootx_printf("\nklimit : 0x%x",(unsigned long)klimit);
439 bootx_printf("\nboot_info at : 0x%x", bi);
440 __asm__ __volatile__ ("mfmsr %0" : "=r" (flags));
441 bootx_printf("\nMSR : 0x%x", flags);
442 __asm__ __volatile__ ("mfspr %0, 287" : "=r" (pvr));
443 bootx_printf("\nPVR : 0x%x", pvr);
444 pvr >>= 16;
445 if (pvr > 1) {
446 __asm__ __volatile__ ("mfspr %0, 1008" : "=r" (flags));
447 bootx_printf("\nHID0 : 0x%x", flags);
448 }
449 if (pvr == 8 || pvr == 12 || pvr == 0x800c) {
450 __asm__ __volatile__ ("mfspr %0, 1019" : "=r" (flags));
451 bootx_printf("\nICTC : 0x%x", flags);
452 }
453#ifdef DEBUG
454 bootx_printf("\n\n");
455 bootx_printf("bi->deviceTreeOffset : 0x%x\n",
456 bi->deviceTreeOffset);
457 bootx_printf("bi->deviceTreeSize : 0x%x\n",
458 bi->deviceTreeSize);
459#endif
460 bootx_printf("\n\n");
461}
462#endif /* CONFIG_BOOTX_TEXT */
463
464void __init bootx_init(unsigned long r3, unsigned long r4)
465{
466 boot_infos_t *bi = (boot_infos_t *) r4;
467 unsigned long hdr;
468 unsigned long space;
469 unsigned long ptr, x;
470 char *model;
471 unsigned long offset = reloc_offset();
472
473 reloc_got2(offset);
474
475 bootx_info = bi;
476
477 /* We haven't cleared any bss at this point, make sure
478 * what we need is initialized
479 */
480 bootx_dt_strbase = bootx_dt_strend = 0;
481 bootx_node_chosen = 0;
482 bootx_disp_path[0] = 0;
483
484 if (!BOOT_INFO_IS_V2_COMPATIBLE(bi))
485 bi->logicalDisplayBase = bi->dispDeviceBase;
486
487 /* Fixup depth 16 -> 15 as that's what MacOS calls 16bpp */
488 if (bi->dispDeviceDepth == 16)
489 bi->dispDeviceDepth = 15;
490
491
492#ifdef CONFIG_BOOTX_TEXT
493 ptr = (unsigned long)bi->logicalDisplayBase;
494 ptr += bi->dispDeviceRect[1] * bi->dispDeviceRowBytes;
495 ptr += bi->dispDeviceRect[0] * ((bi->dispDeviceDepth + 7) / 8);
496 btext_setup_display(bi->dispDeviceRect[2] - bi->dispDeviceRect[0],
497 bi->dispDeviceRect[3] - bi->dispDeviceRect[1],
498 bi->dispDeviceDepth, bi->dispDeviceRowBytes,
499 (unsigned long)bi->logicalDisplayBase);
500 btext_clearscreen();
501 btext_flushscreen();
502#endif /* CONFIG_BOOTX_TEXT */
503
504 /*
505 * Test if boot-info is compatible. Done only in config
506 * CONFIG_BOOTX_TEXT since there is nothing much we can do
507 * with an incompatible version, except display a message
508 * and eventually hang the processor...
509 *
510 * I'll try to keep enough of boot-info compatible in the
511 * future to always allow display of this message;
512 */
513 if (!BOOT_INFO_IS_COMPATIBLE(bi)) {
514 bootx_printf(" !!! WARNING - Incompatible version"
515 " of BootX !!!\n\n\n");
516 for (;;)
517 ;
518 }
519 if (bi->architecture != BOOT_ARCH_PCI) {
520 bootx_printf(" !!! WARNING - Usupported machine"
521 " architecture !\n");
522 for (;;)
523 ;
524 }
525
526#ifdef CONFIG_BOOTX_TEXT
527 btext_welcome(bi);
528#endif
529
530 /* New BootX enters kernel with MMU off, i/os are not allowed
531 * here. This hack will have been done by the boostrap anyway.
532 */
533 if (bi->version < 4) {
534 /*
535 * XXX If this is an iMac, turn off the USB controller.
536 */
537 model = (char *) bootx_early_getprop(r4 + bi->deviceTreeOffset,
538 4, "model");
539 if (model
540 && (strcmp(model, "iMac,1") == 0
541 || strcmp(model, "PowerMac1,1") == 0)) {
542 bootx_printf("iMac,1 detected, shutting down USB\n");
543 out_le32((unsigned __iomem *)0x80880008, 1); /* XXX */
544 }
545 }
546
547 /* Get a pointer that points above the device tree, args, ramdisk,
548 * etc... to use for generating the flattened tree
549 */
550 if (bi->version < 5) {
551 space = bi->deviceTreeOffset + bi->deviceTreeSize;
552 if (bi->ramDisk >= space)
553 space = bi->ramDisk + bi->ramDiskSize;
554 } else
555 space = bi->totalParamsSize;
556
557 bootx_printf("Total space used by parameters & ramdisk: 0x%x\n", space);
558
559 /* New BootX will have flushed all TLBs and enters kernel with
560 * MMU switched OFF, so this should not be useful anymore.
561 */
562 if (bi->version < 4) {
563 bootx_printf("Touching pages...\n");
564
565 /*
566 * Touch each page to make sure the PTEs for them
567 * are in the hash table - the aim is to try to avoid
568 * getting DSI exceptions while copying the kernel image.
569 */
570 for (ptr = ((unsigned long) &_stext) & PAGE_MASK;
571 ptr < (unsigned long)bi + space; ptr += PAGE_SIZE)
572 x = *(volatile unsigned long *)ptr;
573 }
574
575 /* Ok, now we need to generate a flattened device-tree to pass
576 * to the kernel
577 */
578 bootx_printf("Preparing boot params...\n");
579
580 hdr = bootx_flatten_dt(space);
581
582#ifdef CONFIG_BOOTX_TEXT
583#ifdef SET_BOOT_BAT
584 bootx_printf("Preparing BAT...\n");
585 btext_prepare_BAT();
586#else
587 btext_unmap();
588#endif
589#endif
590
591 reloc_got2(-offset);
592
593 __start(hdr, KERNELBASE + offset, 0);
594}