include/asm/pgalloc.h

1 /* SPDX-License-Identifier: GPL-2.0-only */
5  * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
11 #include <asm/mem-layout.h>
14 #include <asm-generic/pgalloc.h>
29 	 * that new address spaces always contain the kernel  in pgd_alloc()
32 	 * map with a copy of the kernel's persistent map.  in pgd_alloc()
36 	mm->context.generation = kmap_generation;  in pgd_alloc()
39 	mm->context.ptbase = __pa(pgd);  in pgd_alloc()
57  * share the same pmd's for their kernel mappings, but the v0.3
58  * Hexagon VM spec has a "monolithic" L1 table for user and kernel
59  * segments.  We track "generations" of the kernel map to minimize
60  * overhead, and update the "slave" copies of the kernel mappings
62  * kernel map of the active thread who's calling pmd_populate_kernel...
73 	mm->context.generation = kmap_generation;  in pmd_populate_kernel()
74 	current->active_mm->context.generation = kmap_generation;  in pmd_populate_kernel()
80 	 * Now the "slave" copy of the current thread.  in pmd_populate_kernel()
83 	pmdindex = (pgd_t *)pmd - mm->pgd;  in pmd_populate_kernel()
84 	ppmd = (pmd_t *)current->active_mm->pgd + pmdindex;  in pmd_populate_kernel()