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Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 and only 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 write to the free software foundation inc 51 franklin street fifth floor boston ma 02110 1301 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 94 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141334.043630402@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
108 lines
2.8 KiB
C
108 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Memory layout definitions for the Hexagon architecture
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*
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* Copyright (c) 2010-2013, The Linux Foundation. All rights reserved.
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*/
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#ifndef _ASM_HEXAGON_MEM_LAYOUT_H
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#define _ASM_HEXAGON_MEM_LAYOUT_H
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#include <linux/const.h>
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/*
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* Have to do this for ginormous numbers, else they get printed as
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* negative numbers, which the linker no likey when you try to
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* assign it to the location counter.
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*/
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#define PAGE_OFFSET _AC(0xc0000000, UL)
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/*
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* Compiling for a platform that needs a crazy physical offset
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* (like if the memory starts at 1GB and up) means we need
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* an actual PHYS_OFFSET. Should be set up in head.S.
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*/
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#ifdef CONFIG_HEXAGON_PHYS_OFFSET
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#ifndef __ASSEMBLY__
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extern unsigned long __phys_offset;
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#endif
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#define PHYS_OFFSET __phys_offset
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#endif
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#ifndef PHYS_OFFSET
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#define PHYS_OFFSET 0
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#endif
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#define PHYS_PFN_OFFSET (PHYS_OFFSET >> PAGE_SHIFT)
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#define ARCH_PFN_OFFSET PHYS_PFN_OFFSET
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#define TASK_SIZE (PAGE_OFFSET)
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/* not sure how these are used yet */
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#define STACK_TOP TASK_SIZE
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#define STACK_TOP_MAX TASK_SIZE
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#ifndef __ASSEMBLY__
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enum fixed_addresses {
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FIX_KMAP_BEGIN,
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FIX_KMAP_END, /* check for per-cpuism */
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__end_of_fixed_addresses
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};
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#define MIN_KERNEL_SEG (PAGE_OFFSET >> PGDIR_SHIFT) /* L1 shift is 22 bits */
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extern int max_kernel_seg;
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/*
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* Start of vmalloc virtual address space for kernel;
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* supposed to be based on the amount of physical memory available
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*/
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#define VMALLOC_START ((unsigned long) __va(high_memory + VMALLOC_OFFSET))
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/* Gap between physical ram and vmalloc space for guard purposes. */
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#define VMALLOC_OFFSET PAGE_SIZE
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/*
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* Create the space between VMALLOC_START and FIXADDR_TOP backwards
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* from the ... "top".
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*
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* Permanent IO mappings will live at 0xfexx_xxxx
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* Hypervisor occupies the last 16MB page at 0xffxxxxxx
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*/
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#define FIXADDR_TOP 0xfe000000
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#define FIXADDR_SIZE (__end_of_fixed_addresses << PAGE_SHIFT)
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#define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE)
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/*
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* "permanent kernel mappings", defined as long-lasting mappings of
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* high-memory page frames into the kernel address space.
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*/
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#define LAST_PKMAP PTRS_PER_PTE
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#define LAST_PKMAP_MASK (LAST_PKMAP - 1)
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#define PKMAP_NR(virt) ((virt - PKMAP_BASE) >> PAGE_SHIFT)
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#define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT))
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/*
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* To the "left" of the fixed map space is the kmap space
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*
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* "Permanent Kernel Mappings"; fancy (or less fancy) PTE table
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* that looks like it's actually walked.
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* Need to check the alignment/shift usage; some archs use
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* PMD_MASK on this value
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*/
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#define PKMAP_BASE (FIXADDR_START-PAGE_SIZE*LAST_PKMAP)
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/*
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* 2 pages of guard gap between where vmalloc area ends
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* and pkmap_base begins.
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*/
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#define VMALLOC_END (PKMAP_BASE-PAGE_SIZE*2)
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#endif /* !__ASSEMBLY__ */
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#endif /* _ASM_HEXAGON_MEM_LAYOUT_H */
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