mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-10-31 14:23:49 +01:00
Sang-Heon Jeon
23e82f0223
On arm64, __early_set_fixmap(), __late_set_fixmap() and __late_clear_fixmap() are all __set_fixmap(). Calling early_ioremap_reset() changes nothing. So remove the call and the macros. No functional change. Link: https://lore.kernel.org/[email protected] Signed-off-by: Sang-Heon Jeon <[email protected]> Acked-by: Will Deacon <[email protected]> Cc: Albert Ou <[email protected]> Cc: Alexandre Ghiti <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: David Hildenbrand <[email protected]> Cc: Liam R. Howlett <[email protected]> Cc: Lorenzo Stoakes <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Mike Rapoport <[email protected]> Cc: Palmer Dabbelt <[email protected]> Cc: Suren Baghdasaryan <[email protected]> Cc: Vlastimil Babka <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
123 lines
3.3 KiB
C
123 lines
3.3 KiB
C
/*
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* fixmap.h: compile-time virtual memory allocation
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1998 Ingo Molnar
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* Copyright (C) 2013 Mark Salter <[email protected]>
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*
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* Adapted from arch/x86 version.
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*
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*/
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#ifndef _ASM_ARM64_FIXMAP_H
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#define _ASM_ARM64_FIXMAP_H
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#ifndef __ASSEMBLER__
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#include <linux/kernel.h>
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#include <linux/math.h>
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#include <linux/sizes.h>
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#include <asm/boot.h>
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#include <asm/page.h>
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#include <asm/pgtable-prot.h>
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/*
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* Here we define all the compile-time 'special' virtual
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* addresses. The point is to have a constant address at
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* compile time, but to set the physical address only
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* in the boot process.
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*
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* Each enum increment in these 'compile-time allocated'
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* memory buffers is page-sized. Use set_fixmap(idx,phys)
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* to associate physical memory with a fixmap index.
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*/
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enum fixed_addresses {
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FIX_HOLE,
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/*
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* Reserve a virtual window for the FDT that is a page bigger than the
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* maximum supported size. The additional space ensures that any FDT
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* that does not exceed MAX_FDT_SIZE can be mapped regardless of
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* whether it crosses any page boundary.
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*/
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FIX_FDT_END,
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FIX_FDT = FIX_FDT_END + DIV_ROUND_UP(MAX_FDT_SIZE, PAGE_SIZE) + 1,
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FIX_EARLYCON_MEM_BASE,
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FIX_TEXT_POKE0,
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#ifdef CONFIG_KVM
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/* One slot per CPU, mapping the guest's VNCR page at EL2. */
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FIX_VNCR_END,
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FIX_VNCR = FIX_VNCR_END + NR_CPUS,
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#endif
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#ifdef CONFIG_ACPI_APEI_GHES
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/* Used for GHES mapping from assorted contexts */
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FIX_APEI_GHES_IRQ,
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FIX_APEI_GHES_SEA,
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#ifdef CONFIG_ARM_SDE_INTERFACE
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FIX_APEI_GHES_SDEI_NORMAL,
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FIX_APEI_GHES_SDEI_CRITICAL,
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#endif
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#endif /* CONFIG_ACPI_APEI_GHES */
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#ifdef CONFIG_UNMAP_KERNEL_AT_EL0
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#ifdef CONFIG_RELOCATABLE
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FIX_ENTRY_TRAMP_TEXT4, /* one extra slot for the data page */
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#endif
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FIX_ENTRY_TRAMP_TEXT3,
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FIX_ENTRY_TRAMP_TEXT2,
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FIX_ENTRY_TRAMP_TEXT1,
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#define TRAMP_VALIAS (__fix_to_virt(FIX_ENTRY_TRAMP_TEXT1))
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#endif /* CONFIG_UNMAP_KERNEL_AT_EL0 */
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__end_of_permanent_fixed_addresses,
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/*
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* Temporary boot-time mappings, used by early_ioremap(),
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* before ioremap() is functional.
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*
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* Reserve one extra page so a 256K mapping may start at any
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* offset within a page. early_ioremap() maps the page-aligned
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* physical range, so the initial offset can consume an extra page.
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*/
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#define NR_FIX_BTMAPS ((SZ_256K / PAGE_SIZE) + 1)
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#define FIX_BTMAPS_SLOTS 7
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#define TOTAL_FIX_BTMAPS (NR_FIX_BTMAPS * FIX_BTMAPS_SLOTS)
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FIX_BTMAP_END = __end_of_permanent_fixed_addresses,
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FIX_BTMAP_BEGIN = FIX_BTMAP_END + TOTAL_FIX_BTMAPS - 1,
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/*
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* Used for kernel page table creation, so unmapped memory may be used
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* for tables.
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*/
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FIX_PTE,
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FIX_PMD,
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FIX_PUD,
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FIX_P4D,
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FIX_PGD,
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__end_of_fixed_addresses
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};
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#define FIXADDR_SIZE (__end_of_permanent_fixed_addresses << PAGE_SHIFT)
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#define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE)
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#define FIXADDR_TOT_SIZE (__end_of_fixed_addresses << PAGE_SHIFT)
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#define FIXADDR_TOT_START (FIXADDR_TOP - FIXADDR_TOT_SIZE)
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#define FIXMAP_PAGE_IO __pgprot(PROT_DEVICE_nGnRE)
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void __init early_fixmap_init(void);
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#define __early_set_fixmap __set_fixmap
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extern void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot);
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#include <asm-generic/fixmap.h>
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#endif /* !__ASSEMBLER__ */
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#endif /* _ASM_ARM64_FIXMAP_H */
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