1 // SPDX-License-Identifier: GPL-2.0
10  *  Copyright 2006-2007 Helge Deller (deller@gmx.de)
42  * guarantee that global objects will be laid out in memory in the same order
62 	.name	= "PDC data (Page Zero)",
118 	physmem_range_t pmem_holes[MAX_PHYSMEM_RANGES - 1];  in setup_bootmem()
134 		for (j = i; j > 0; j--) {  in setup_bootmem()
137 			if (pmem_ranges[j-1].start_pfn <  in setup_bootmem()
142 			tmp = pmem_ranges[j-1];  in setup_bootmem()
143 			pmem_ranges[j-1] = pmem_ranges[j];  in setup_bootmem()
155 		if (pmem_ranges[i].start_pfn -  in setup_bootmem()
156 			(pmem_ranges[i-1].start_pfn +  in setup_bootmem()
157 			 pmem_ranges[i-1].pages) > MAX_GAP) {  in setup_bootmem()
161 			       pmem_ranges[i].start_pfn -  in setup_bootmem()
162 			       (pmem_ranges[i-1].start_pfn +  in setup_bootmem()
163 			        pmem_ranges[i-1].pages));  in setup_bootmem()
180 			i, start, start + (size - 1), size >> 20);  in setup_bootmem()
183 		res->name = "System RAM";  in setup_bootmem()
184 		res->start = start;  in setup_bootmem()
185 		res->end = start + size - 1;  in setup_bootmem()
186 		res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;  in setup_bootmem()
214 						       - (mem_max >> PAGE_SHIFT);  in setup_bootmem()
235 			hole_pages = pmem_ranges[i].start_pfn - end_pfn;  in setup_bootmem()
244 		pmem_ranges[0].pages = end_pfn - pmem_ranges[0].start_pfn;  in setup_bootmem()
274 	 * We can't use memblock top-down allocations because we only  in setup_bootmem()
287 	/* reserve PAGE0 pdc memory, kernel text/data/bss & bootmap */  in setup_bootmem()
291 	memblock_reserve(0UL, (unsigned long)(PAGE0->mem_free +  in setup_bootmem()
294 			(unsigned long)(_end - KERNEL_BINARY_TEXT_START));  in setup_bootmem()
308 		printk(KERN_INFO "initrd: %08lx-%08lx\n", initrd_start, initrd_end);  in setup_bootmem()
313 				initrd_reserve = mem_max - __pa(initrd_start);  in setup_bootmem()
315 				initrd_reserve = initrd_end - initrd_start;  in setup_bootmem()
318 …printk(KERN_INFO "initrd: reserving %08lx-%08lx (mem_max %08lx)\n", __pa(initrd_start), __pa(initr…  in setup_bootmem()
326 	data_resource.end = virt_to_phys(_end) - 1;  in setup_bootmem()
328 	code_resource.end = virt_to_phys(&data_start)-1;  in setup_bootmem()
373 	/* for 2-level configuration PTRS_PER_PMD is 0 so start_pmd will be 0 */  in map_pages()
374 	start_pmd = ((start_vaddr >> PMD_SHIFT) & (PTRS_PER_PMD - 1));  in map_pages()
375 	start_pte = ((start_vaddr >> PAGE_SHIFT) & (PTRS_PER_PTE - 1));  in map_pages()
453 	map_pages(start, __pa(start), end-start,  in set_kernel_text_rw()
469 	map_pages(init_end, __pa(init_end), kernel_end - init_end,  in free_initmem()
472 	/* The init text pages are marked R-X.  We have to  in free_initmem()
473 	 * flush the icache and mark them RW-  in free_initmem()
479 	map_pages(init_begin, __pa(init_begin), init_end - init_begin,  in free_initmem()
481 	/* now remap at PAGE_KERNEL since the TLB is pre-primed to execute  in free_initmem()
483 	map_pages(init_begin, __pa(init_begin), init_end - init_begin,  in free_initmem()
490 	 * pages are no-longer executable */  in free_initmem()
505 	unsigned long roai_size = __end_ro_after_init - __start_ro_after_init;  in mark_rodata_ro()
507 	pr_info("Write protected read-only-after-init data: %luk\n", roai_size >> 10);  in mark_rodata_ro()
518  * between mapping areas. That means that  any out-of-bounds memory
531 				     & ~(VM_MAP_OFFSET-1)))
584 	       "     vmalloc : 0x%px - 0x%px   (%4ld MB)\n"  in mem_init()
585 	       "     fixmap  : 0x%px - 0x%px   (%4ld kB)\n"  in mem_init()
586 	       "     memory  : 0x%px - 0x%px   (%4ld MB)\n"  in mem_init()
587 	       "       .init : 0x%px - 0x%px   (%4ld kB)\n"  in mem_init()
588 	       "       .data : 0x%px - 0x%px   (%4ld kB)\n"  in mem_init()
589 	       "       .text : 0x%px - 0x%px   (%4ld kB)\n",  in mem_init()
592 	       (VMALLOC_END - VMALLOC_START) >> 20,  in mem_init()
598 	       ((unsigned long)high_memory - (unsigned long)__va(0)) >> 20,  in mem_init()
601 	       ((unsigned long)__init_end - (unsigned long)__init_begin) >> 10,  in mem_init()
604 	       ((unsigned long)_edata - (unsigned long)_etext) >> 10,  in mem_init()
607 	       ((unsigned long)_etext - (unsigned long)_text) >> 10);  in mem_init()
619  * side effect of trapping those pesky NULL-reference errors in the
643 		printk(KERN_INFO "initrd: mapping %08lx-%08lx\n", initrd_start, initrd_end);  in pagetable_init()
645 			  initrd_end - initrd_start, PAGE_KERNEL, 0);  in pagetable_init()
659 	   into not treating it as DP-relative data. */  in gateway_init()
708  * Currently we have a one-to-one relationship between space IDs and
725 static unsigned long free_space_ids = NR_SPACE_IDS - 1;
745 	free_space_ids--;  in alloc_sid()