linux_dsm_epyc7002/arch/arm64/include/asm/sparsemem.h

/*
 * Copyright (C) 2012 ARM Ltd.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#ifndef __ASM_SPARSEMEM_H
#define __ASM_SPARSEMEM_H

#ifdef CONFIG_SPARSEMEM
#define MAX_PHYSMEM_BITS	40
#define SECTION_SIZE_BITS	30
#endif

#endif
arm64: MMU definitions The virtual memory layout is described in Documentation/arm64/memory.txt. This patch adds the MMU definitions for the 4KB and 64KB translation table configurations. The SECTION_SIZE is 2MB with 4KB page and 512MB with 64KB page configuration. PHYS_OFFSET is calculated at run-time and stored in a variable (no run-time code patching at this stage). On the current implementation, both user and kernel address spaces are 512G (39-bit) each with a maximum of 256G for the RAM linear mapping. Linux uses 3 levels of translation tables with the 4K page configuration and 2 levels with the 64K configuration. Extending the memory space beyond 39-bit with the 4K pages or 42-bit with 64K pages requires an additional level of translation tables. The SPARSEMEM configuration is global to all AArch64 platforms and allows for 1GB sections with SPARSEMEM_VMEMMAP enabled by default. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Nicolas Pitre <nico@linaro.org> Acked-by: Olof Johansson <olof@lixom.net> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: Arnd Bergmann <arnd@arndb.de> 2012-03-05 18:49:27 +07:00			`/*`
			`* Copyright (C) 2012 ARM Ltd.`
			`*`
			`* This program is free software; you can redistribute it and/or modify`
			`* it under the terms of the GNU General Public License version 2 as`
			`* published by the Free Software Foundation.`
			`*`
			`* This program is distributed in the hope that it will be useful,`
			`* but WITHOUT ANY WARRANTY; without even the implied warranty of`
			`* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the`
			`* GNU General Public License for more details.`
			`*`
			`* You should have received a copy of the GNU General Public License`
			`* along with this program. If not, see <http://www.gnu.org/licenses/>.`
			`*/`
			`#ifndef __ASM_SPARSEMEM_H`
			`#define __ASM_SPARSEMEM_H`

			`#ifdef CONFIG_SPARSEMEM`
			`#define MAX_PHYSMEM_BITS 40`
			`#define SECTION_SIZE_BITS 30`
			`#endif`

			`#endif`