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a3a0f8c8 | 1 | /* |
a3a0f8c8 | 2 | * |
70342287 | 3 | * Description: Defines the platform resources for Gaia-based settops. |
a3a0f8c8 DV |
4 | * |
5 | * Copyright (C) 2005-2009 Scientific-Atlanta, Inc. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | * | |
a3a0f8c8 DV |
21 | * NOTE: The bootloader allocates persistent memory at an address which is |
22 | * 16 MiB below the end of the highest address in KSEG0. All fixed | |
23 | * address memory reservations must avoid this region. | |
24 | */ | |
25 | ||
26 | #include <linux/device.h> | |
27 | #include <linux/kernel.h> | |
28 | #include <linux/init.h> | |
29 | #include <linux/resource.h> | |
30 | #include <linux/serial_reg.h> | |
31 | #include <linux/io.h> | |
32 | #include <linux/bootmem.h> | |
33 | #include <linux/mm.h> | |
34 | #include <linux/platform_device.h> | |
35 | #include <linux/module.h> | |
36 | #include <asm/page.h> | |
37 | #include <linux/swap.h> | |
38 | #include <linux/highmem.h> | |
39 | #include <linux/dma-mapping.h> | |
40 | ||
41 | #include <asm/mach-powertv/asic.h> | |
42 | #include <asm/mach-powertv/asic_regs.h> | |
43 | #include <asm/mach-powertv/interrupts.h> | |
44 | ||
45 | #ifdef CONFIG_BOOTLOADER_DRIVER | |
46 | #include <asm/mach-powertv/kbldr.h> | |
47 | #endif | |
48 | #include <asm/bootinfo.h> | |
49 | ||
50 | #define BOOTLDRFAMILY(byte1, byte0) (((byte1) << 8) | (byte0)) | |
51 | ||
52 | /* | |
53 | * Forward Prototypes | |
54 | */ | |
55 | static void pmem_setup_resource(void); | |
56 | ||
57 | /* | |
58 | * Global Variables | |
59 | */ | |
60 | enum asic_type asic; | |
61 | ||
62 | unsigned int platform_features; | |
63 | unsigned int platform_family; | |
59dfa2fc DV |
64 | struct register_map _asic_register_map; |
65 | EXPORT_SYMBOL(_asic_register_map); /* Exported for testing */ | |
a3a0f8c8 DV |
66 | unsigned long asic_phy_base; |
67 | unsigned long asic_base; | |
68 | EXPORT_SYMBOL(asic_base); /* Exported for testing */ | |
69 | struct resource *gp_resources; | |
a3a0f8c8 DV |
70 | |
71 | /* | |
72 | * Don't recommend to use it directly, it is usually used by kernel internally. | |
73 | * Portable code should be using interfaces such as ioremp, dma_map_single, etc. | |
74 | */ | |
ca36c36b DV |
75 | unsigned long phys_to_dma_offset; |
76 | EXPORT_SYMBOL(phys_to_dma_offset); | |
a3a0f8c8 DV |
77 | |
78 | /* | |
79 | * | |
80 | * IO Resource Definition | |
81 | * | |
82 | */ | |
83 | ||
84 | struct resource asic_resource = { | |
85 | .name = "ASIC Resource", | |
86 | .start = 0, | |
87 | .end = ASIC_IO_SIZE, | |
88 | .flags = IORESOURCE_MEM, | |
89 | }; | |
90 | ||
a3a0f8c8 DV |
91 | /* |
92 | * Allow override of bootloader-specified model | |
70342287 | 93 | * Returns zero on success, a negative errno value on failure. This parameter |
0d365753 | 94 | * allows overriding of the bootloader-specified model. |
a3a0f8c8 DV |
95 | */ |
96 | static char __initdata cmdline[COMMAND_LINE_SIZE]; | |
97 | ||
70342287 | 98 | #define FORCEFAMILY_PARAM "forcefamily" |
a3a0f8c8 | 99 | |
0d365753 DV |
100 | /* |
101 | * check_forcefamily - check for, and parse, forcefamily command line parameter | |
102 | * @forced_family: Pointer to two-character array in which to store the | |
103 | * value of the forcedfamily parameter, if any. | |
104 | */ | |
a3a0f8c8 DV |
105 | static __init int check_forcefamily(unsigned char forced_family[2]) |
106 | { | |
107 | const char *p; | |
108 | ||
109 | forced_family[0] = '\0'; | |
110 | forced_family[1] = '\0'; | |
111 | ||
112 | /* Check the command line for a forcefamily directive */ | |
113 | strncpy(cmdline, arcs_cmdline, COMMAND_LINE_SIZE - 1); | |
114 | p = strstr(cmdline, FORCEFAMILY_PARAM); | |
115 | if (p && (p != cmdline) && (*(p - 1) != ' ')) | |
116 | p = strstr(p, " " FORCEFAMILY_PARAM "="); | |
117 | ||
118 | if (p) { | |
119 | p += strlen(FORCEFAMILY_PARAM "="); | |
120 | ||
121 | if (*p == '\0' || *(p + 1) == '\0' || | |
122 | (*(p + 2) != '\0' && *(p + 2) != ' ')) | |
123 | pr_err(FORCEFAMILY_PARAM " must be exactly two " | |
124 | "characters long, ignoring value\n"); | |
125 | ||
126 | else { | |
127 | forced_family[0] = *p; | |
128 | forced_family[1] = *(p + 1); | |
129 | } | |
130 | } | |
131 | ||
132 | return 0; | |
133 | } | |
134 | ||
135 | /* | |
136 | * platform_set_family - determine major platform family type. | |
137 | * | |
138 | * Returns family type; -1 if none | |
139 | * Returns the family type; -1 if none | |
140 | * | |
141 | */ | |
142 | static __init noinline void platform_set_family(void) | |
143 | { | |
a3a0f8c8 DV |
144 | unsigned char forced_family[2]; |
145 | unsigned short bootldr_family; | |
146 | ||
0d365753 | 147 | if (check_forcefamily(forced_family) == 0) |
a3a0f8c8 DV |
148 | bootldr_family = BOOTLDRFAMILY(forced_family[0], |
149 | forced_family[1]); | |
f7c1285f | 150 | else |
a3a0f8c8 DV |
151 | bootldr_family = (unsigned short) BOOTLDRFAMILY( |
152 | CONFIG_BOOTLOADER_FAMILY[0], | |
153 | CONFIG_BOOTLOADER_FAMILY[1]); | |
a3a0f8c8 DV |
154 | |
155 | pr_info("Bootloader Family = 0x%04X\n", bootldr_family); | |
156 | ||
157 | switch (bootldr_family) { | |
158 | case BOOTLDRFAMILY('R', '1'): | |
159 | platform_family = FAMILY_1500; | |
160 | break; | |
161 | case BOOTLDRFAMILY('4', '4'): | |
162 | platform_family = FAMILY_4500; | |
163 | break; | |
164 | case BOOTLDRFAMILY('4', '6'): | |
165 | platform_family = FAMILY_4600; | |
166 | break; | |
167 | case BOOTLDRFAMILY('A', '1'): | |
168 | platform_family = FAMILY_4600VZA; | |
169 | break; | |
170 | case BOOTLDRFAMILY('8', '5'): | |
171 | platform_family = FAMILY_8500; | |
172 | break; | |
173 | case BOOTLDRFAMILY('R', '2'): | |
174 | platform_family = FAMILY_8500RNG; | |
175 | break; | |
176 | case BOOTLDRFAMILY('8', '6'): | |
177 | platform_family = FAMILY_8600; | |
178 | break; | |
179 | case BOOTLDRFAMILY('B', '1'): | |
180 | platform_family = FAMILY_8600VZB; | |
181 | break; | |
182 | case BOOTLDRFAMILY('E', '1'): | |
183 | platform_family = FAMILY_1500VZE; | |
184 | break; | |
185 | case BOOTLDRFAMILY('F', '1'): | |
186 | platform_family = FAMILY_1500VZF; | |
187 | break; | |
51f1336d DV |
188 | case BOOTLDRFAMILY('8', '7'): |
189 | platform_family = FAMILY_8700; | |
190 | break; | |
a3a0f8c8 DV |
191 | default: |
192 | platform_family = -1; | |
193 | } | |
194 | } | |
195 | ||
196 | unsigned int platform_get_family(void) | |
197 | { | |
198 | return platform_family; | |
199 | } | |
200 | EXPORT_SYMBOL(platform_get_family); | |
201 | ||
a3a0f8c8 DV |
202 | /* |
203 | * platform_get_asic - determine the ASIC type. | |
204 | * | |
0d365753 | 205 | * Returns the ASIC type, or ASIC_UNKNOWN if unknown |
a3a0f8c8 DV |
206 | * |
207 | */ | |
208 | enum asic_type platform_get_asic(void) | |
209 | { | |
210 | return asic; | |
211 | } | |
212 | EXPORT_SYMBOL(platform_get_asic); | |
213 | ||
214 | /* | |
0d365753 DV |
215 | * set_register_map - set ASIC register configuration |
216 | * @phys_base: Physical address of the base of the ASIC registers | |
217 | * @map: Description of key ASIC registers | |
a3a0f8c8 | 218 | */ |
59dfa2fc DV |
219 | static void __init set_register_map(unsigned long phys_base, |
220 | const struct register_map *map) | |
221 | { | |
222 | asic_phy_base = phys_base; | |
223 | _asic_register_map = *map; | |
224 | register_map_virtualize(&_asic_register_map); | |
225 | asic_base = (unsigned long)ioremap_nocache(phys_base, ASIC_IO_SIZE); | |
226 | } | |
227 | ||
a3a0f8c8 DV |
228 | /** |
229 | * configure_platform - configuration based on platform type. | |
230 | */ | |
231 | void __init configure_platform(void) | |
232 | { | |
233 | platform_set_family(); | |
234 | ||
235 | switch (platform_family) { | |
236 | case FAMILY_1500: | |
237 | case FAMILY_1500VZE: | |
238 | case FAMILY_1500VZF: | |
239 | platform_features = FFS_CAPABLE; | |
240 | asic = ASIC_CALLIOPE; | |
59dfa2fc | 241 | set_register_map(CALLIOPE_IO_BASE, &calliope_register_map); |
a3a0f8c8 DV |
242 | |
243 | if (platform_family == FAMILY_1500VZE) { | |
244 | gp_resources = non_dvr_vze_calliope_resources; | |
245 | pr_info("Platform: 1500/Vz Class E - " | |
246 | "CALLIOPE, NON_DVR_CAPABLE\n"); | |
247 | } else if (platform_family == FAMILY_1500VZF) { | |
248 | gp_resources = non_dvr_vzf_calliope_resources; | |
249 | pr_info("Platform: 1500/Vz Class F - " | |
250 | "CALLIOPE, NON_DVR_CAPABLE\n"); | |
251 | } else { | |
252 | gp_resources = non_dvr_calliope_resources; | |
253 | pr_info("Platform: 1500/RNG100 - CALLIOPE, " | |
254 | "NON_DVR_CAPABLE\n"); | |
255 | } | |
256 | break; | |
257 | ||
258 | case FAMILY_4500: | |
259 | platform_features = FFS_CAPABLE | PCIE_CAPABLE | | |
260 | DISPLAY_CAPABLE; | |
261 | asic = ASIC_ZEUS; | |
59dfa2fc | 262 | set_register_map(ZEUS_IO_BASE, &zeus_register_map); |
a3a0f8c8 DV |
263 | gp_resources = non_dvr_zeus_resources; |
264 | ||
265 | pr_info("Platform: 4500 - ZEUS, NON_DVR_CAPABLE\n"); | |
266 | break; | |
267 | ||
268 | case FAMILY_4600: | |
269 | { | |
270 | unsigned int chipversion = 0; | |
271 | ||
272 | /* The settop has PCIE but it isn't used, so don't advertise | |
273 | * it*/ | |
274 | platform_features = FFS_CAPABLE | DISPLAY_CAPABLE; | |
a3a0f8c8 | 275 | |
28d7d213 DV |
276 | /* Cronus and Cronus Lite have the same register map */ |
277 | set_register_map(CRONUS_IO_BASE, &cronus_register_map); | |
278 | ||
a3a0f8c8 DV |
279 | /* ASIC version will determine if this is a real CronusLite or |
280 | * Castrati(Cronus) */ | |
281 | chipversion = asic_read(chipver3) << 24; | |
282 | chipversion |= asic_read(chipver2) << 16; | |
283 | chipversion |= asic_read(chipver1) << 8; | |
284 | chipversion |= asic_read(chipver0); | |
285 | ||
286 | if ((chipversion == CRONUS_10) || (chipversion == CRONUS_11)) | |
287 | asic = ASIC_CRONUS; | |
288 | else | |
289 | asic = ASIC_CRONUSLITE; | |
290 | ||
59dfa2fc | 291 | gp_resources = non_dvr_cronuslite_resources; |
a3a0f8c8 DV |
292 | pr_info("Platform: 4600 - %s, NON_DVR_CAPABLE, " |
293 | "chipversion=0x%08X\n", | |
294 | (asic == ASIC_CRONUS) ? "CRONUS" : "CRONUS LITE", | |
295 | chipversion); | |
296 | break; | |
297 | } | |
298 | case FAMILY_4600VZA: | |
299 | platform_features = FFS_CAPABLE | DISPLAY_CAPABLE; | |
300 | asic = ASIC_CRONUS; | |
59dfa2fc | 301 | set_register_map(CRONUS_IO_BASE, &cronus_register_map); |
a3a0f8c8 DV |
302 | gp_resources = non_dvr_cronus_resources; |
303 | ||
304 | pr_info("Platform: Vz Class A - CRONUS, NON_DVR_CAPABLE\n"); | |
305 | break; | |
306 | ||
307 | case FAMILY_8500: | |
308 | case FAMILY_8500RNG: | |
309 | platform_features = DVR_CAPABLE | PCIE_CAPABLE | | |
310 | DISPLAY_CAPABLE; | |
311 | asic = ASIC_ZEUS; | |
59dfa2fc | 312 | set_register_map(ZEUS_IO_BASE, &zeus_register_map); |
a3a0f8c8 DV |
313 | gp_resources = dvr_zeus_resources; |
314 | ||
315 | pr_info("Platform: 8500/RNG200 - ZEUS, DVR_CAPABLE\n"); | |
316 | break; | |
317 | ||
318 | case FAMILY_8600: | |
319 | case FAMILY_8600VZB: | |
320 | platform_features = DVR_CAPABLE | PCIE_CAPABLE | | |
321 | DISPLAY_CAPABLE; | |
322 | asic = ASIC_CRONUS; | |
59dfa2fc | 323 | set_register_map(CRONUS_IO_BASE, &cronus_register_map); |
a3a0f8c8 DV |
324 | gp_resources = dvr_cronus_resources; |
325 | ||
326 | pr_info("Platform: 8600/Vz Class B - CRONUS, " | |
327 | "DVR_CAPABLE\n"); | |
328 | break; | |
329 | ||
51f1336d DV |
330 | case FAMILY_8700: |
331 | platform_features = FFS_CAPABLE | PCIE_CAPABLE; | |
332 | asic = ASIC_GAIA; | |
333 | set_register_map(GAIA_IO_BASE, &gaia_register_map); | |
334 | gp_resources = dvr_gaia_resources; | |
335 | ||
336 | pr_info("Platform: 8700 - GAIA, DVR_CAPABLE\n"); | |
337 | break; | |
338 | ||
a3a0f8c8 DV |
339 | default: |
340 | pr_crit("Platform: UNKNOWN PLATFORM\n"); | |
341 | break; | |
342 | } | |
343 | ||
344 | switch (asic) { | |
345 | case ASIC_ZEUS: | |
ca36c36b | 346 | phys_to_dma_offset = 0x30000000; |
a3a0f8c8 DV |
347 | break; |
348 | case ASIC_CALLIOPE: | |
ca36c36b | 349 | phys_to_dma_offset = 0x10000000; |
a3a0f8c8 DV |
350 | break; |
351 | case ASIC_CRONUSLITE: | |
352 | /* Fall through */ | |
353 | case ASIC_CRONUS: | |
354 | /* | |
355 | * TODO: We suppose 0x10000000 aliases into 0x20000000- | |
356 | * 0x2XXXXXXX. If 0x10000000 aliases into 0x60000000- | |
357 | * 0x6XXXXXXX, the offset should be 0x50000000, not 0x10000000. | |
358 | */ | |
ca36c36b | 359 | phys_to_dma_offset = 0x10000000; |
a3a0f8c8 DV |
360 | break; |
361 | default: | |
ca36c36b | 362 | phys_to_dma_offset = 0x00000000; |
a3a0f8c8 DV |
363 | break; |
364 | } | |
365 | } | |
366 | ||
a3a0f8c8 | 367 | /* |
0d365753 | 368 | * RESOURCE ALLOCATION |
a3a0f8c8 DV |
369 | * |
370 | */ | |
371 | /* | |
372 | * Allocates/reserves the Platform memory resources early in the boot process. | |
373 | * This ignores any resources that are designated IORESOURCE_IO | |
374 | */ | |
375 | void __init platform_alloc_bootmem(void) | |
376 | { | |
377 | int i; | |
378 | int total = 0; | |
379 | ||
380 | /* Get persistent memory data from command line before allocating | |
381 | * resources. This need to happen before normal command line parsing | |
382 | * has been done */ | |
383 | pmem_setup_resource(); | |
384 | ||
385 | /* Loop through looking for resources that want a particular address */ | |
386 | for (i = 0; gp_resources[i].flags != 0; i++) { | |
28f65c11 | 387 | int size = resource_size(&gp_resources[i]); |
a3a0f8c8 DV |
388 | if ((gp_resources[i].start != 0) && |
389 | ((gp_resources[i].flags & IORESOURCE_MEM) != 0)) { | |
ca36c36b | 390 | reserve_bootmem(dma_to_phys(gp_resources[i].start), |
a3a0f8c8 | 391 | size, 0); |
28f65c11 | 392 | total += resource_size(&gp_resources[i]); |
a3a0f8c8 DV |
393 | pr_info("reserve resource %s at %08x (%u bytes)\n", |
394 | gp_resources[i].name, gp_resources[i].start, | |
28f65c11 | 395 | resource_size(&gp_resources[i])); |
a3a0f8c8 DV |
396 | } |
397 | } | |
398 | ||
399 | /* Loop through assigning addresses for those that are left */ | |
400 | for (i = 0; gp_resources[i].flags != 0; i++) { | |
28f65c11 | 401 | int size = resource_size(&gp_resources[i]); |
a3a0f8c8 DV |
402 | if ((gp_resources[i].start == 0) && |
403 | ((gp_resources[i].flags & IORESOURCE_MEM) != 0)) { | |
404 | void *mem = alloc_bootmem_pages(size); | |
405 | ||
406 | if (mem == NULL) | |
407 | pr_err("Unable to allocate bootmem pages " | |
408 | "for %s\n", gp_resources[i].name); | |
409 | ||
410 | else { | |
411 | gp_resources[i].start = | |
ca36c36b | 412 | phys_to_dma(virt_to_phys(mem)); |
a3a0f8c8 DV |
413 | gp_resources[i].end = |
414 | gp_resources[i].start + size - 1; | |
415 | total += size; | |
416 | pr_info("allocate resource %s at %08x " | |
417 | "(%u bytes)\n", | |
418 | gp_resources[i].name, | |
419 | gp_resources[i].start, size); | |
420 | } | |
421 | } | |
422 | } | |
423 | ||
424 | pr_info("Total Platform driver memory allocation: 0x%08x\n", total); | |
425 | ||
426 | /* indicate resources that are platform I/O related */ | |
427 | for (i = 0; gp_resources[i].flags != 0; i++) { | |
428 | if ((gp_resources[i].start != 0) && | |
429 | ((gp_resources[i].flags & IORESOURCE_IO) != 0)) { | |
430 | pr_info("reserved platform resource %s at %08x\n", | |
431 | gp_resources[i].name, gp_resources[i].start); | |
432 | } | |
433 | } | |
434 | } | |
435 | ||
436 | /* | |
437 | * | |
438 | * PERSISTENT MEMORY (PMEM) CONFIGURATION | |
439 | * | |
440 | */ | |
441 | static unsigned long pmemaddr __initdata; | |
442 | ||
443 | static int __init early_param_pmemaddr(char *p) | |
444 | { | |
445 | pmemaddr = (unsigned long)simple_strtoul(p, NULL, 0); | |
446 | return 0; | |
447 | } | |
448 | early_param("pmemaddr", early_param_pmemaddr); | |
449 | ||
450 | static long pmemlen __initdata; | |
451 | ||
452 | static int __init early_param_pmemlen(char *p) | |
453 | { | |
454 | /* TODO: we can use this code when and if the bootloader ever changes this */ | |
455 | #if 0 | |
456 | pmemlen = (unsigned long)simple_strtoul(p, NULL, 0); | |
457 | #else | |
458 | pmemlen = 0x20000; | |
459 | #endif | |
460 | return 0; | |
461 | } | |
462 | early_param("pmemlen", early_param_pmemlen); | |
463 | ||
464 | /* | |
465 | * Set up persistent memory. If we were given values, we patch the array of | |
466 | * resources. Otherwise, persistent memory may be allocated anywhere at all. | |
467 | */ | |
468 | static void __init pmem_setup_resource(void) | |
469 | { | |
470 | struct resource *resource; | |
471 | resource = asic_resource_get("DiagPersistentMemory"); | |
472 | ||
473 | if (resource && pmemaddr && pmemlen) { | |
474 | /* The address provided by bootloader is in kseg0. Convert to | |
475 | * a bus address. */ | |
ca36c36b | 476 | resource->start = phys_to_dma(pmemaddr - 0x80000000); |
a3a0f8c8 DV |
477 | resource->end = resource->start + pmemlen - 1; |
478 | ||
70342287 | 479 | pr_info("persistent memory: start=0x%x end=0x%x\n", |
a3a0f8c8 DV |
480 | resource->start, resource->end); |
481 | } | |
482 | } | |
483 | ||
484 | /* | |
485 | * | |
486 | * RESOURCE ACCESS FUNCTIONS | |
487 | * | |
488 | */ | |
489 | ||
490 | /** | |
491 | * asic_resource_get - retrieves parameters for a platform resource. | |
492 | * @name: string to match resource | |
493 | * | |
494 | * Returns a pointer to a struct resource corresponding to the given name. | |
495 | * | |
496 | * CANNOT BE NAMED platform_resource_get, which would be the obvious choice, | |
497 | * as this function name is already declared | |
498 | */ | |
499 | struct resource *asic_resource_get(const char *name) | |
500 | { | |
501 | int i; | |
502 | ||
503 | for (i = 0; gp_resources[i].flags != 0; i++) { | |
504 | if (strcmp(gp_resources[i].name, name) == 0) | |
505 | return &gp_resources[i]; | |
506 | } | |
507 | ||
508 | return NULL; | |
509 | } | |
510 | EXPORT_SYMBOL(asic_resource_get); | |
511 | ||
512 | /** | |
513 | * platform_release_memory - release pre-allocated memory | |
514 | * @ptr: pointer to memory to release | |
515 | * @size: size of resource | |
516 | * | |
517 | * This must only be called for memory allocated or reserved via the boot | |
518 | * memory allocator. | |
519 | */ | |
520 | void platform_release_memory(void *ptr, int size) | |
521 | { | |
c055629b | 522 | free_reserved_area(ptr, ptr + size, -1, NULL); |
a3a0f8c8 DV |
523 | } |
524 | EXPORT_SYMBOL(platform_release_memory); | |
525 | ||
526 | /* | |
527 | * | |
528 | * FEATURE AVAILABILITY FUNCTIONS | |
529 | * | |
530 | */ | |
531 | int platform_supports_dvr(void) | |
532 | { | |
533 | return (platform_features & DVR_CAPABLE) != 0; | |
534 | } | |
535 | ||
536 | int platform_supports_ffs(void) | |
537 | { | |
538 | return (platform_features & FFS_CAPABLE) != 0; | |
539 | } | |
540 | ||
541 | int platform_supports_pcie(void) | |
542 | { | |
543 | return (platform_features & PCIE_CAPABLE) != 0; | |
544 | } | |
545 | ||
546 | int platform_supports_display(void) | |
547 | { | |
548 | return (platform_features & DISPLAY_CAPABLE) != 0; | |
549 | } |