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2024-12-19 9370bb92b2d16684ee45cf24e879c93c509162da 
 kernel/arch/alpha/kernel/setup.c
....@@ -29,7 +29,7 @@
2929 #include <linux/string.h>
3030 #include <linux/ioport.h>
3131 #include <linux/platform_device.h>
32
-#include <linux/bootmem.h>
32
+#include <linux/memblock.h>
3333 #include <linux/pci.h>
3434 #include <linux/seq_file.h>
3535 #include <linux/root_dev.h>
....@@ -55,7 +55,6 @@
5555 };
5656 
5757 #include <linux/uaccess.h>
58
-#include <asm/pgtable.h>
5958 #include <asm/hwrpb.h>
6059 #include <asm/dma.h>
6160 #include <asm/mmu_context.h>
....@@ -254,7 +253,7 @@
254253 
255254 	/* Fix up for the Jensen's queer RTC placement.  */
256255 	standard_io_resources[0].start = RTC_PORT(0);
257
-	standard_io_resources[0].end = RTC_PORT(0) + 0x10;
256
+	standard_io_resources[0].end = RTC_PORT(0) + 0x0f;
258257 
259258 	for (i = 0; i < ARRAY_SIZE(standard_io_resources); ++i)
260259 		request_resource(io, standard_io_resources+i);
....@@ -293,7 +292,7 @@
293292 	unsigned long size;
294293 
295294 	size = initrd_end - initrd_start;
296
-	start = __alloc_bootmem(PAGE_ALIGN(size), PAGE_SIZE, 0);
295
+	start = memblock_alloc(PAGE_ALIGN(size), PAGE_SIZE);
297296 	if (!start || __pa(start) + size > mem_limit) {
298297 		initrd_start = initrd_end = 0;
299298 		return NULL;
....@@ -312,9 +311,7 @@
312311 {
313312 	struct memclust_struct * cluster;
314313 	struct memdesc_struct * memdesc;
315
-	unsigned long start_kernel_pfn, end_kernel_pfn;
316
-	unsigned long bootmap_size, bootmap_pages, bootmap_start;
317
-	unsigned long start, end;
314
+	unsigned long kernel_size;
318315 	unsigned long i;
319316 
320317 	/* Find free clusters, and init and free the bootmem accordingly.  */
....@@ -322,19 +319,25 @@
322319 	  (hwrpb->mddt_offset + (unsigned long) hwrpb);
323320 
324321 	for_each_mem_cluster(memdesc, cluster, i) {
322
+		unsigned long end;
323
+
325324 		printk("memcluster %lu, usage %01lx, start %8lu, end %8lu\n",
326325 		       i, cluster->usage, cluster->start_pfn,
327326 		       cluster->start_pfn + cluster->numpages);
327
+
328
+		end = cluster->start_pfn + cluster->numpages;
329
+		if (end > max_low_pfn)
330
+			max_low_pfn = end;
331
+
332
+		memblock_add(PFN_PHYS(cluster->start_pfn),
333
+			     cluster->numpages << PAGE_SHIFT);
328334 
329335 		/* Bit 0 is console/PALcode reserved.  Bit 1 is
330336 		   non-volatile memory -- we might want to mark
331337 		   this for later.  */
332338 		if (cluster->usage & 3)
333
-			continue;
334
-
335
-		end = cluster->start_pfn + cluster->numpages;
336
-		if (end > max_low_pfn)
337
-			max_low_pfn = end;
339
+			memblock_reserve(PFN_PHYS(cluster->start_pfn),
340
+				         cluster->numpages << PAGE_SHIFT);
338341 	}
339342 
340343 	/*
....@@ -363,87 +366,9 @@
363366 		max_low_pfn = mem_size_limit;
364367 	}
365368 
366
-	/* Find the bounds of kernel memory.  */
367
-	start_kernel_pfn = PFN_DOWN(KERNEL_START_PHYS);
368
-	end_kernel_pfn = PFN_UP(virt_to_phys(kernel_end));
369
-	bootmap_start = -1;
370
-
371
- try_again:
372
-	if (max_low_pfn <= end_kernel_pfn)
373
-		panic("not enough memory to boot");
374
-
375
-	/* We need to know how many physically contiguous pages
376
-	   we'll need for the bootmap.  */
377
-	bootmap_pages = bootmem_bootmap_pages(max_low_pfn);
378
-
379
-	/* Now find a good region where to allocate the bootmap.  */
380
-	for_each_mem_cluster(memdesc, cluster, i) {
381
-		if (cluster->usage & 3)
382
-			continue;
383
-
384
-		start = cluster->start_pfn;
385
-		end = start + cluster->numpages;
386
-		if (start >= max_low_pfn)
387
-			continue;
388
-		if (end > max_low_pfn)
389
-			end = max_low_pfn;
390
-		if (start < start_kernel_pfn) {
391
-			if (end > end_kernel_pfn
392
-			    && end - end_kernel_pfn >= bootmap_pages) {
393
-				bootmap_start = end_kernel_pfn;
394
-				break;
395
-			} else if (end > start_kernel_pfn)
396
-				end = start_kernel_pfn;
397
-		} else if (start < end_kernel_pfn)
398
-			start = end_kernel_pfn;
399
-		if (end - start >= bootmap_pages) {
400
-			bootmap_start = start;
401
-			break;
402
-		}
403
-	}
404
-
405
-	if (bootmap_start == ~0UL) {
406
-		max_low_pfn >>= 1;
407
-		goto try_again;
408
-	}
409
-
410
-	/* Allocate the bootmap and mark the whole MM as reserved.  */
411
-	bootmap_size = init_bootmem(bootmap_start, max_low_pfn);
412
-
413
-	/* Mark the free regions.  */
414
-	for_each_mem_cluster(memdesc, cluster, i) {
415
-		if (cluster->usage & 3)
416
-			continue;
417
-
418
-		start = cluster->start_pfn;
419
-		end = cluster->start_pfn + cluster->numpages;
420
-		if (start >= max_low_pfn)
421
-			continue;
422
-		if (end > max_low_pfn)
423
-			end = max_low_pfn;
424
-		if (start < start_kernel_pfn) {
425
-			if (end > end_kernel_pfn) {
426
-				free_bootmem(PFN_PHYS(start),
427
-					     (PFN_PHYS(start_kernel_pfn)
428
-					      - PFN_PHYS(start)));
429
-				printk("freeing pages %ld:%ld\n",
430
-				       start, start_kernel_pfn);
431
-				start = end_kernel_pfn;
432
-			} else if (end > start_kernel_pfn)
433
-				end = start_kernel_pfn;
434
-		} else if (start < end_kernel_pfn)
435
-			start = end_kernel_pfn;
436
-		if (start >= end)
437
-			continue;
438
-
439
-		free_bootmem(PFN_PHYS(start), PFN_PHYS(end) - PFN_PHYS(start));
440
-		printk("freeing pages %ld:%ld\n", start, end);
441
-	}
442
-
443
-	/* Reserve the bootmap memory.  */
444
-	reserve_bootmem(PFN_PHYS(bootmap_start), bootmap_size,
445
-			BOOTMEM_DEFAULT);
446
-	printk("reserving pages %ld:%ld\n", bootmap_start, bootmap_start+PFN_UP(bootmap_size));
369
+	/* Reserve the kernel memory. */
370
+	kernel_size = virt_to_phys(kernel_end) - KERNEL_START_PHYS;
371
+	memblock_reserve(KERNEL_START_PHYS, kernel_size);
447372 
448373 #ifdef CONFIG_BLK_DEV_INITRD
449374 	initrd_start = INITRD_START;
....@@ -459,8 +384,8 @@
459384 				       initrd_end,
460385 				       phys_to_virt(PFN_PHYS(max_low_pfn)));
461386 		} else {
462
-			reserve_bootmem(virt_to_phys((void *)initrd_start),
463
-					INITRD_SIZE, BOOTMEM_DEFAULT);
387
+			memblock_reserve(virt_to_phys((void *)initrd_start),
388
+					INITRD_SIZE);
464389 		}
465390 	}
466391 #endif /* CONFIG_BLK_DEV_INITRD */
....@@ -469,8 +394,7 @@
469394 extern void setup_memory(void *);
470395 #endif /* !CONFIG_DISCONTIGMEM */
471396 
472
-int __init
473
-page_is_ram(unsigned long pfn)
397
+int page_is_ram(unsigned long pfn)
474398 {
475399 	struct memclust_struct * cluster;
476400 	struct memdesc_struct * memdesc;
....@@ -504,6 +428,20 @@
504428 }
505429 
506430 arch_initcall(register_cpus);
431
+
432
+#ifdef CONFIG_MAGIC_SYSRQ
433
+static void sysrq_reboot_handler(int unused)
434
+{
435
+	machine_halt();
436
+}
437
+
438
+static const struct sysrq_key_op srm_sysrq_reboot_op = {
439
+	.handler	= sysrq_reboot_handler,
440
+	.help_msg       = "reboot(b)",
441
+	.action_msg     = "Resetting",
442
+	.enable_mask    = SYSRQ_ENABLE_BOOT,
443
+};
444
+#endif
507445 
508446 void __init
509447 setup_arch(char **cmdline_p)
....@@ -541,7 +479,7 @@
541479 #ifndef alpha_using_srm
542480 	/* Assume that we've booted from SRM if we haven't booted from MILO.
543481 	   Detect the later by looking for "MILO" in the system serial nr.  */
544
-	alpha_using_srm = strncmp((const char *)hwrpb->ssn, "MILO", 4) != 0;
482
+	alpha_using_srm = !str_has_prefix((const char *)hwrpb->ssn, "MILO");
545483 #endif
546484 #ifndef alpha_using_qemu
547485 	/* Similarly, look for QEMU.  */
....@@ -625,8 +563,8 @@
625563 	/* If we're using SRM, make sysrq-b halt back to the prom,
626564 	   not auto-reboot.  */
627565 	if (alpha_using_srm) {
628
-		struct sysrq_key_op *op = __sysrq_get_key_op('b');
629
-		op->handler = (void *) machine_halt;
566
+		unregister_sysrq_key('b', __sysrq_reboot_op);
567
+		register_sysrq_key('b', &srm_sysrq_reboot_op);
630568 	}
631569 #endif
632570 
....@@ -709,6 +647,7 @@
709647 
710648 	/* Find our memory.  */
711649 	setup_memory(kernel_end);
650
+	memblock_set_bottom_up(true);
712651 
713652 	/* First guess at cpu cache sizes.  Do this before init_arch.  */
714653 	determine_cpu_caches(cpu->type);
....@@ -729,8 +668,6 @@
729668 #ifdef CONFIG_VT
730669 #if defined(CONFIG_VGA_CONSOLE)
731670 	conswitchp = &vga_con;
732
-#elif defined(CONFIG_DUMMY_CONSOLE)
733
-	conswitchp = &dummy_con;
734671 #endif
735672 #endif
736673 
....@@ -1488,6 +1425,7 @@
14881425 static void *
14891426 c_next(struct seq_file *f, void *v, loff_t *pos)
14901427 {
1428
+	(*pos)++;
14911429 	return NULL;
14921430 }
14931431