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NFSv4.1: turn off pNFS on ds connection failure
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / arch / arm / mach-orion5x / common.c
blob8dc2c76d226004de633bdc1e2dbe14681790a7d4
1 /*
2 * arch/arm/mach-orion5x/common.c
3 *
4 * Core functions for Marvell Orion 5x SoCs
5 *
6 * Maintainer: Tzachi Perelstein <tzachi@marvell.com>
7 *
8 * This file is licensed under the terms of the GNU General Public
9 * License version 2. This program is licensed "as is" without any
10 * warranty of any kind, whether express or implied.
11 */
12
13 #include <linux/kernel.h>
14 #include <linux/init.h>
15 #include <linux/platform_device.h>
16 #include <linux/serial_8250.h>
17 #include <linux/mbus.h>
18 #include <linux/mv643xx_eth.h>
19 #include <linux/mv643xx_i2c.h>
20 #include <linux/ata_platform.h>
21 #include <linux/spi/orion_spi.h>
22 #include <net/dsa.h>
23 #include <asm/page.h>
24 #include <asm/setup.h>
25 #include <asm/timex.h>
26 #include <asm/mach/arch.h>
27 #include <asm/mach/map.h>
28 #include <asm/mach/time.h>
29 #include <mach/hardware.h>
30 #include <mach/orion5x.h>
31 #include <plat/ehci-orion.h>
32 #include <plat/mv_xor.h>
33 #include <plat/orion_nand.h>
34 #include <plat/orion_wdt.h>
35 #include <plat/time.h>
36 #include "common.h"
37
38 /*****************************************************************************
39 * I/O Address Mapping
40 ****************************************************************************/
41 static struct map_desc orion5x_io_desc[] __initdata = {
42 {
43 .virtual = ORION5X_REGS_VIRT_BASE,
44 .pfn = __phys_to_pfn(ORION5X_REGS_PHYS_BASE),
45 .length = ORION5X_REGS_SIZE,
46 .type = MT_DEVICE,
47 }, {
48 .virtual = ORION5X_PCIE_IO_VIRT_BASE,
49 .pfn = __phys_to_pfn(ORION5X_PCIE_IO_PHYS_BASE),
50 .length = ORION5X_PCIE_IO_SIZE,
51 .type = MT_DEVICE,
52 }, {
53 .virtual = ORION5X_PCI_IO_VIRT_BASE,
54 .pfn = __phys_to_pfn(ORION5X_PCI_IO_PHYS_BASE),
55 .length = ORION5X_PCI_IO_SIZE,
56 .type = MT_DEVICE,
57 }, {
58 .virtual = ORION5X_PCIE_WA_VIRT_BASE,
59 .pfn = __phys_to_pfn(ORION5X_PCIE_WA_PHYS_BASE),
60 .length = ORION5X_PCIE_WA_SIZE,
61 .type = MT_DEVICE,
62 },
63 };
64
65 void __init orion5x_map_io(void)
66 {
67 iotable_init(orion5x_io_desc, ARRAY_SIZE(orion5x_io_desc));
68 }
69
70
71 /*****************************************************************************
72 * EHCI
73 ****************************************************************************/
74 static struct orion_ehci_data orion5x_ehci_data = {
75 .dram = &orion5x_mbus_dram_info,
76 .phy_version = EHCI_PHY_ORION,
77 };
78
79 static u64 ehci_dmamask = 0xffffffffUL;
80
81
82 /*****************************************************************************
83 * EHCI0
84 ****************************************************************************/
85 static struct resource orion5x_ehci0_resources[] = {
86 {
87 .start = ORION5X_USB0_PHYS_BASE,
88 .end = ORION5X_USB0_PHYS_BASE + SZ_4K - 1,
89 .flags = IORESOURCE_MEM,
90 }, {
91 .start = IRQ_ORION5X_USB0_CTRL,
92 .end = IRQ_ORION5X_USB0_CTRL,
93 .flags = IORESOURCE_IRQ,
94 },
95 };
96
97 static struct platform_device orion5x_ehci0 = {
98 .name = "orion-ehci",
99 .id = 0,
100 .dev = {
101 .dma_mask = &ehci_dmamask,
102 .coherent_dma_mask = 0xffffffff,
103 .platform_data = &orion5x_ehci_data,
104 },
105 .resource = orion5x_ehci0_resources,
106 .num_resources = ARRAY_SIZE(orion5x_ehci0_resources),
107 };
108
109 void __init orion5x_ehci0_init(void)
110 {
111 platform_device_register(&orion5x_ehci0);
112 }
113
114
115 /*****************************************************************************
116 * EHCI1
117 ****************************************************************************/
118 static struct resource orion5x_ehci1_resources[] = {
119 {
120 .start = ORION5X_USB1_PHYS_BASE,
121 .end = ORION5X_USB1_PHYS_BASE + SZ_4K - 1,
122 .flags = IORESOURCE_MEM,
123 }, {
124 .start = IRQ_ORION5X_USB1_CTRL,
125 .end = IRQ_ORION5X_USB1_CTRL,
126 .flags = IORESOURCE_IRQ,
127 },
128 };
129
130 static struct platform_device orion5x_ehci1 = {
131 .name = "orion-ehci",
132 .id = 1,
133 .dev = {
134 .dma_mask = &ehci_dmamask,
135 .coherent_dma_mask = 0xffffffff,
136 .platform_data = &orion5x_ehci_data,
137 },
138 .resource = orion5x_ehci1_resources,
139 .num_resources = ARRAY_SIZE(orion5x_ehci1_resources),
140 };
141
142 void __init orion5x_ehci1_init(void)
143 {
144 platform_device_register(&orion5x_ehci1);
145 }
146
147
148 /*****************************************************************************
149 * GigE
150 ****************************************************************************/
151 struct mv643xx_eth_shared_platform_data orion5x_eth_shared_data = {
152 .dram = &orion5x_mbus_dram_info,
153 };
154
155 static struct resource orion5x_eth_shared_resources[] = {
156 {
157 .start = ORION5X_ETH_PHYS_BASE + 0x2000,
158 .end = ORION5X_ETH_PHYS_BASE + 0x3fff,
159 .flags = IORESOURCE_MEM,
160 }, {
161 .start = IRQ_ORION5X_ETH_ERR,
162 .end = IRQ_ORION5X_ETH_ERR,
163 .flags = IORESOURCE_IRQ,
164 },
165 };
166
167 static struct platform_device orion5x_eth_shared = {
168 .name = MV643XX_ETH_SHARED_NAME,
169 .id = 0,
170 .dev = {
171 .platform_data = &orion5x_eth_shared_data,
172 },
173 .num_resources = ARRAY_SIZE(orion5x_eth_shared_resources),
174 .resource = orion5x_eth_shared_resources,
175 };
176
177 static struct resource orion5x_eth_resources[] = {
178 {
179 .name = "eth irq",
180 .start = IRQ_ORION5X_ETH_SUM,
181 .end = IRQ_ORION5X_ETH_SUM,
182 .flags = IORESOURCE_IRQ,
183 },
184 };
185
186 static struct platform_device orion5x_eth = {
187 .name = MV643XX_ETH_NAME,
188 .id = 0,
189 .num_resources = 1,
190 .resource = orion5x_eth_resources,
191 .dev = {
192 .coherent_dma_mask = 0xffffffff,
193 },
194 };
195
196 void __init orion5x_eth_init(struct mv643xx_eth_platform_data *eth_data)
197 {
198 eth_data->shared = &orion5x_eth_shared;
199 orion5x_eth.dev.platform_data = eth_data;
200
201 platform_device_register(&orion5x_eth_shared);
202 platform_device_register(&orion5x_eth);
203 }
204
205
206 /*****************************************************************************
207 * Ethernet switch
208 ****************************************************************************/
209 static struct resource orion5x_switch_resources[] = {
210 {
211 .start = 0,
212 .end = 0,
213 .flags = IORESOURCE_IRQ,
214 },
215 };
216
217 static struct platform_device orion5x_switch_device = {
218 .name = "dsa",
219 .id = 0,
220 .num_resources = 0,
221 .resource = orion5x_switch_resources,
222 };
223
224 void __init orion5x_eth_switch_init(struct dsa_platform_data *d, int irq)
225 {
226 int i;
227
228 if (irq != NO_IRQ) {
229 orion5x_switch_resources[0].start = irq;
230 orion5x_switch_resources[0].end = irq;
231 orion5x_switch_device.num_resources = 1;
232 }
233
234 d->netdev = &orion5x_eth.dev;
235 for (i = 0; i < d->nr_chips; i++)
236 d->chip[i].mii_bus = &orion5x_eth_shared.dev;
237 orion5x_switch_device.dev.platform_data = d;
238
239 platform_device_register(&orion5x_switch_device);
240 }
241
242
243 /*****************************************************************************
244 * I2C
245 ****************************************************************************/
246 static struct mv64xxx_i2c_pdata orion5x_i2c_pdata = {
247 .freq_m = 8, /* assumes 166 MHz TCLK */
248 .freq_n = 3,
249 .timeout = 1000, /* Default timeout of 1 second */
250 };
251
252 static struct resource orion5x_i2c_resources[] = {
253 {
254 .start = I2C_PHYS_BASE,
255 .end = I2C_PHYS_BASE + 0x1f,
256 .flags = IORESOURCE_MEM,
257 }, {
258 .start = IRQ_ORION5X_I2C,
259 .end = IRQ_ORION5X_I2C,
260 .flags = IORESOURCE_IRQ,
261 },
262 };
263
264 static struct platform_device orion5x_i2c = {
265 .name = MV64XXX_I2C_CTLR_NAME,
266 .id = 0,
267 .num_resources = ARRAY_SIZE(orion5x_i2c_resources),
268 .resource = orion5x_i2c_resources,
269 .dev = {
270 .platform_data = &orion5x_i2c_pdata,
271 },
272 };
273
274 void __init orion5x_i2c_init(void)
275 {
276 platform_device_register(&orion5x_i2c);
277 }
278
279
280 /*****************************************************************************
281 * SATA
282 ****************************************************************************/
283 static struct resource orion5x_sata_resources[] = {
284 {
285 .name = "sata base",
286 .start = ORION5X_SATA_PHYS_BASE,
287 .end = ORION5X_SATA_PHYS_BASE + 0x5000 - 1,
288 .flags = IORESOURCE_MEM,
289 }, {
290 .name = "sata irq",
291 .start = IRQ_ORION5X_SATA,
292 .end = IRQ_ORION5X_SATA,
293 .flags = IORESOURCE_IRQ,
294 },
295 };
296
297 static struct platform_device orion5x_sata = {
298 .name = "sata_mv",
299 .id = 0,
300 .dev = {
301 .coherent_dma_mask = 0xffffffff,
302 },
303 .num_resources = ARRAY_SIZE(orion5x_sata_resources),
304 .resource = orion5x_sata_resources,
305 };
306
307 void __init orion5x_sata_init(struct mv_sata_platform_data *sata_data)
308 {
309 sata_data->dram = &orion5x_mbus_dram_info;
310 orion5x_sata.dev.platform_data = sata_data;
311 platform_device_register(&orion5x_sata);
312 }
313
314
315 /*****************************************************************************
316 * SPI
317 ****************************************************************************/
318 static struct orion_spi_info orion5x_spi_plat_data = {
319 .tclk = 0,
320 .enable_clock_fix = 1,
321 };
322
323 static struct resource orion5x_spi_resources[] = {
324 {
325 .name = "spi base",
326 .start = SPI_PHYS_BASE,
327 .end = SPI_PHYS_BASE + 0x1f,
328 .flags = IORESOURCE_MEM,
329 },
330 };
331
332 static struct platform_device orion5x_spi = {
333 .name = "orion_spi",
334 .id = 0,
335 .dev = {
336 .platform_data = &orion5x_spi_plat_data,
337 },
338 .num_resources = ARRAY_SIZE(orion5x_spi_resources),
339 .resource = orion5x_spi_resources,
340 };
341
342 void __init orion5x_spi_init()
343 {
344 platform_device_register(&orion5x_spi);
345 }
346
347
348 /*****************************************************************************
349 * UART0
350 ****************************************************************************/
351 static struct plat_serial8250_port orion5x_uart0_data[] = {
352 {
353 .mapbase = UART0_PHYS_BASE,
354 .membase = (char *)UART0_VIRT_BASE,
355 .irq = IRQ_ORION5X_UART0,
356 .flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF,
357 .iotype = UPIO_MEM,
358 .regshift = 2,
359 .uartclk = 0,
360 }, {
361 },
362 };
363
364 static struct resource orion5x_uart0_resources[] = {
365 {
366 .start = UART0_PHYS_BASE,
367 .end = UART0_PHYS_BASE + 0xff,
368 .flags = IORESOURCE_MEM,
369 }, {
370 .start = IRQ_ORION5X_UART0,
371 .end = IRQ_ORION5X_UART0,
372 .flags = IORESOURCE_IRQ,
373 },
374 };
375
376 static struct platform_device orion5x_uart0 = {
377 .name = "serial8250",
378 .id = PLAT8250_DEV_PLATFORM,
379 .dev = {
380 .platform_data = orion5x_uart0_data,
381 },
382 .resource = orion5x_uart0_resources,
383 .num_resources = ARRAY_SIZE(orion5x_uart0_resources),
384 };
385
386 void __init orion5x_uart0_init(void)
387 {
388 platform_device_register(&orion5x_uart0);
389 }
390
391
392 /*****************************************************************************
393 * UART1
394 ****************************************************************************/
395 static struct plat_serial8250_port orion5x_uart1_data[] = {
396 {
397 .mapbase = UART1_PHYS_BASE,
398 .membase = (char *)UART1_VIRT_BASE,
399 .irq = IRQ_ORION5X_UART1,
400 .flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF,
401 .iotype = UPIO_MEM,
402 .regshift = 2,
403 .uartclk = 0,
404 }, {
405 },
406 };
407
408 static struct resource orion5x_uart1_resources[] = {
409 {
410 .start = UART1_PHYS_BASE,
411 .end = UART1_PHYS_BASE + 0xff,
412 .flags = IORESOURCE_MEM,
413 }, {
414 .start = IRQ_ORION5X_UART1,
415 .end = IRQ_ORION5X_UART1,
416 .flags = IORESOURCE_IRQ,
417 },
418 };
419
420 static struct platform_device orion5x_uart1 = {
421 .name = "serial8250",
422 .id = PLAT8250_DEV_PLATFORM1,
423 .dev = {
424 .platform_data = orion5x_uart1_data,
425 },
426 .resource = orion5x_uart1_resources,
427 .num_resources = ARRAY_SIZE(orion5x_uart1_resources),
428 };
429
430 void __init orion5x_uart1_init(void)
431 {
432 platform_device_register(&orion5x_uart1);
433 }
434
435
436 /*****************************************************************************
437 * XOR engine
438 ****************************************************************************/
439 struct mv_xor_platform_shared_data orion5x_xor_shared_data = {
440 .dram = &orion5x_mbus_dram_info,
441 };
442
443 static struct resource orion5x_xor_shared_resources[] = {
444 {
445 .name = "xor low",
446 .start = ORION5X_XOR_PHYS_BASE,
447 .end = ORION5X_XOR_PHYS_BASE + 0xff,
448 .flags = IORESOURCE_MEM,
449 }, {
450 .name = "xor high",
451 .start = ORION5X_XOR_PHYS_BASE + 0x200,
452 .end = ORION5X_XOR_PHYS_BASE + 0x2ff,
453 .flags = IORESOURCE_MEM,
454 },
455 };
456
457 static struct platform_device orion5x_xor_shared = {
458 .name = MV_XOR_SHARED_NAME,
459 .id = 0,
460 .dev = {
461 .platform_data = &orion5x_xor_shared_data,
462 },
463 .num_resources = ARRAY_SIZE(orion5x_xor_shared_resources),
464 .resource = orion5x_xor_shared_resources,
465 };
466
467 static u64 orion5x_xor_dmamask = DMA_BIT_MASK(32);
468
469 static struct resource orion5x_xor0_resources[] = {
470 [0] = {
471 .start = IRQ_ORION5X_XOR0,
472 .end = IRQ_ORION5X_XOR0,
473 .flags = IORESOURCE_IRQ,
474 },
475 };
476
477 static struct mv_xor_platform_data orion5x_xor0_data = {
478 .shared = &orion5x_xor_shared,
479 .hw_id = 0,
480 .pool_size = PAGE_SIZE,
481 };
482
483 static struct platform_device orion5x_xor0_channel = {
484 .name = MV_XOR_NAME,
485 .id = 0,
486 .num_resources = ARRAY_SIZE(orion5x_xor0_resources),
487 .resource = orion5x_xor0_resources,
488 .dev = {
489 .dma_mask = &orion5x_xor_dmamask,
490 .coherent_dma_mask = DMA_BIT_MASK(64),
491 .platform_data = &orion5x_xor0_data,
492 },
493 };
494
495 static struct resource orion5x_xor1_resources[] = {
496 [0] = {
497 .start = IRQ_ORION5X_XOR1,
498 .end = IRQ_ORION5X_XOR1,
499 .flags = IORESOURCE_IRQ,
500 },
501 };
502
503 static struct mv_xor_platform_data orion5x_xor1_data = {
504 .shared = &orion5x_xor_shared,
505 .hw_id = 1,
506 .pool_size = PAGE_SIZE,
507 };
508
509 static struct platform_device orion5x_xor1_channel = {
510 .name = MV_XOR_NAME,
511 .id = 1,
512 .num_resources = ARRAY_SIZE(orion5x_xor1_resources),
513 .resource = orion5x_xor1_resources,
514 .dev = {
515 .dma_mask = &orion5x_xor_dmamask,
516 .coherent_dma_mask = DMA_BIT_MASK(64),
517 .platform_data = &orion5x_xor1_data,
518 },
519 };
520
521 void __init orion5x_xor_init(void)
522 {
523 platform_device_register(&orion5x_xor_shared);
524
525 /*
526 * two engines can't do memset simultaneously, this limitation
527 * satisfied by removing memset support from one of the engines.
528 */
529 dma_cap_set(DMA_MEMCPY, orion5x_xor0_data.cap_mask);
530 dma_cap_set(DMA_XOR, orion5x_xor0_data.cap_mask);
531 platform_device_register(&orion5x_xor0_channel);
532
533 dma_cap_set(DMA_MEMCPY, orion5x_xor1_data.cap_mask);
534 dma_cap_set(DMA_MEMSET, orion5x_xor1_data.cap_mask);
535 dma_cap_set(DMA_XOR, orion5x_xor1_data.cap_mask);
536 platform_device_register(&orion5x_xor1_channel);
537 }
538
539 static struct resource orion5x_crypto_res[] = {
540 {
541 .name = "regs",
542 .start = ORION5X_CRYPTO_PHYS_BASE,
543 .end = ORION5X_CRYPTO_PHYS_BASE + 0xffff,
544 .flags = IORESOURCE_MEM,
545 }, {
546 .name = "sram",
547 .start = ORION5X_SRAM_PHYS_BASE,
548 .end = ORION5X_SRAM_PHYS_BASE + SZ_8K - 1,
549 .flags = IORESOURCE_MEM,
550 }, {
551 .name = "crypto interrupt",
552 .start = IRQ_ORION5X_CESA,
553 .end = IRQ_ORION5X_CESA,
554 .flags = IORESOURCE_IRQ,
555 },
556 };
557
558 static struct platform_device orion5x_crypto_device = {
559 .name = "mv_crypto",
560 .id = -1,
561 .num_resources = ARRAY_SIZE(orion5x_crypto_res),
562 .resource = orion5x_crypto_res,
563 };
564
565 static int __init orion5x_crypto_init(void)
566 {
567 int ret;
568
569 ret = orion5x_setup_sram_win();
570 if (ret)
571 return ret;
572
573 return platform_device_register(&orion5x_crypto_device);
574 }
575
576 /*****************************************************************************
577 * Watchdog
578 ****************************************************************************/
579 static struct orion_wdt_platform_data orion5x_wdt_data = {
580 .tclk = 0,
581 };
582
583 static struct platform_device orion5x_wdt_device = {
584 .name = "orion_wdt",
585 .id = -1,
586 .dev = {
587 .platform_data = &orion5x_wdt_data,
588 },
589 .num_resources = 0,
590 };
591
592 void __init orion5x_wdt_init(void)
593 {
594 orion5x_wdt_data.tclk = orion5x_tclk;
595 platform_device_register(&orion5x_wdt_device);
596 }
597
598
599 /*****************************************************************************
600 * Time handling
601 ****************************************************************************/
602 int orion5x_tclk;
603
604 int __init orion5x_find_tclk(void)
605 {
606 u32 dev, rev;
607
608 orion5x_pcie_id(&dev, &rev);
609 if (dev == MV88F6183_DEV_ID &&
610 (readl(MPP_RESET_SAMPLE) & 0x00000200) == 0)
611 return 133333333;
612
613 return 166666667;
614 }
615
616 static void orion5x_timer_init(void)
617 {
618 orion5x_tclk = orion5x_find_tclk();
619 orion_time_init(IRQ_ORION5X_BRIDGE, orion5x_tclk);
620 }
621
622 struct sys_timer orion5x_timer = {
623 .init = orion5x_timer_init,
624 };
625
626
627 /*****************************************************************************
628 * General
629 ****************************************************************************/
630 /*
631 * Identify device ID and rev from PCIe configuration header space '0'.
632 */
633 static void __init orion5x_id(u32 *dev, u32 *rev, char **dev_name)
634 {
635 orion5x_pcie_id(dev, rev);
636
637 if (*dev == MV88F5281_DEV_ID) {
638 if (*rev == MV88F5281_REV_D2) {
639 *dev_name = "MV88F5281-D2";
640 } else if (*rev == MV88F5281_REV_D1) {
641 *dev_name = "MV88F5281-D1";
642 } else if (*rev == MV88F5281_REV_D0) {
643 *dev_name = "MV88F5281-D0";
644 } else {
645 *dev_name = "MV88F5281-Rev-Unsupported";
646 }
647 } else if (*dev == MV88F5182_DEV_ID) {
648 if (*rev == MV88F5182_REV_A2) {
649 *dev_name = "MV88F5182-A2";
650 } else {
651 *dev_name = "MV88F5182-Rev-Unsupported";
652 }
653 } else if (*dev == MV88F5181_DEV_ID) {
654 if (*rev == MV88F5181_REV_B1) {
655 *dev_name = "MV88F5181-Rev-B1";
656 } else if (*rev == MV88F5181L_REV_A1) {
657 *dev_name = "MV88F5181L-Rev-A1";
658 } else {
659 *dev_name = "MV88F5181(L)-Rev-Unsupported";
660 }
661 } else if (*dev == MV88F6183_DEV_ID) {
662 if (*rev == MV88F6183_REV_B0) {
663 *dev_name = "MV88F6183-Rev-B0";
664 } else {
665 *dev_name = "MV88F6183-Rev-Unsupported";
666 }
667 } else {
668 *dev_name = "Device-Unknown";
669 }
670 }
671
672 void __init orion5x_init(void)
673 {
674 char *dev_name;
675 u32 dev, rev;
676
677 orion5x_id(&dev, &rev, &dev_name);
678 printk(KERN_INFO "Orion ID: %s. TCLK=%d.\n", dev_name, orion5x_tclk);
679
680 orion5x_eth_shared_data.t_clk = orion5x_tclk;
681 orion5x_spi_plat_data.tclk = orion5x_tclk;
682 orion5x_uart0_data[0].uartclk = orion5x_tclk;
683 orion5x_uart1_data[0].uartclk = orion5x_tclk;
684
685 /*
686 * Setup Orion address map
687 */
688 orion5x_setup_cpu_mbus_bridge();
689
690 /*
691 * Don't issue "Wait for Interrupt" instruction if we are
692 * running on D0 5281 silicon.
693 */
694 if (dev == MV88F5281_DEV_ID && rev == MV88F5281_REV_D0) {
695 printk(KERN_INFO "Orion: Applying 5281 D0 WFI workaround.\n");
696 disable_hlt();
697 }
698
699 /*
700 * The 5082/5181l/5182/6082/6082l/6183 have crypto
701 * while 5180n/5181/5281 don't have crypto.
702 */
703 if ((dev == MV88F5181_DEV_ID && rev >= MV88F5181L_REV_A0) ||
704 dev == MV88F5182_DEV_ID || dev == MV88F6183_DEV_ID)
705 orion5x_crypto_init();
706
707 /*
708 * Register watchdog driver
709 */
710 orion5x_wdt_init();
711 }
712
713 /*
714 * Many orion-based systems have buggy bootloader implementations.
715 * This is a common fixup for bogus memory tags.
716 */
717 void __init tag_fixup_mem32(struct machine_desc *mdesc, struct tag *t,
718 char **from, struct meminfo *meminfo)
719 {
720 for (; t->hdr.size; t = tag_next(t))
721 if (t->hdr.tag == ATAG_MEM &&
722 (!t->u.mem.size || t->u.mem.size & ~PAGE_MASK ||
723 t->u.mem.start & ~PAGE_MASK)) {
724 printk(KERN_WARNING
725 "Clearing invalid memory bank %dKB@0x%08x\n",
726 t->u.mem.size / 1024, t->u.mem.start);
727 t->hdr.tag = 0;
728 }
729 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree