threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
111 lines
2.9 KiB
C
111 lines
2.9 KiB
C
/*
|
|
* fixmap.h: compile-time virtual memory allocation
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 1998 Ingo Molnar
|
|
* Copyright (C) 2013 Mark Salter <msalter@redhat.com>
|
|
*
|
|
* Adapted from arch/x86 version.
|
|
*
|
|
*/
|
|
|
|
#ifndef _ASM_ARM64_FIXMAP_H
|
|
#define _ASM_ARM64_FIXMAP_H
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#include <linux/kernel.h>
|
|
#include <linux/sizes.h>
|
|
#include <asm/boot.h>
|
|
#include <asm/page.h>
|
|
#include <asm/pgtable-prot.h>
|
|
|
|
/*
|
|
* Here we define all the compile-time 'special' virtual
|
|
* addresses. The point is to have a constant address at
|
|
* compile time, but to set the physical address only
|
|
* in the boot process.
|
|
*
|
|
* These 'compile-time allocated' memory buffers are
|
|
* page-sized. Use set_fixmap(idx,phys) to associate
|
|
* physical memory with fixmap indices.
|
|
*
|
|
*/
|
|
enum fixed_addresses {
|
|
FIX_HOLE,
|
|
|
|
/*
|
|
* Reserve a virtual window for the FDT that is 2 MB larger than the
|
|
* maximum supported size, and put it at the top of the fixmap region.
|
|
* The additional space ensures that any FDT that does not exceed
|
|
* MAX_FDT_SIZE can be mapped regardless of whether it crosses any
|
|
* 2 MB alignment boundaries.
|
|
*
|
|
* Keep this at the top so it remains 2 MB aligned.
|
|
*/
|
|
#define FIX_FDT_SIZE (MAX_FDT_SIZE + SZ_2M)
|
|
FIX_FDT_END,
|
|
FIX_FDT = FIX_FDT_END + FIX_FDT_SIZE / PAGE_SIZE - 1,
|
|
|
|
FIX_EARLYCON_MEM_BASE,
|
|
FIX_TEXT_POKE0,
|
|
|
|
#ifdef CONFIG_ACPI_APEI_GHES
|
|
/* Used for GHES mapping from assorted contexts */
|
|
FIX_APEI_GHES_IRQ,
|
|
FIX_APEI_GHES_NMI,
|
|
#endif /* CONFIG_ACPI_APEI_GHES */
|
|
|
|
#ifdef CONFIG_UNMAP_KERNEL_AT_EL0
|
|
FIX_ENTRY_TRAMP_TEXT3,
|
|
FIX_ENTRY_TRAMP_TEXT2,
|
|
FIX_ENTRY_TRAMP_TEXT1,
|
|
FIX_ENTRY_TRAMP_DATA,
|
|
#define TRAMP_VALIAS (__fix_to_virt(FIX_ENTRY_TRAMP_TEXT1))
|
|
#endif /* CONFIG_UNMAP_KERNEL_AT_EL0 */
|
|
__end_of_permanent_fixed_addresses,
|
|
|
|
/*
|
|
* Temporary boot-time mappings, used by early_ioremap(),
|
|
* before ioremap() is functional.
|
|
*/
|
|
#define NR_FIX_BTMAPS (SZ_256K / PAGE_SIZE)
|
|
#define FIX_BTMAPS_SLOTS 7
|
|
#define TOTAL_FIX_BTMAPS (NR_FIX_BTMAPS * FIX_BTMAPS_SLOTS)
|
|
|
|
FIX_BTMAP_END = __end_of_permanent_fixed_addresses,
|
|
FIX_BTMAP_BEGIN = FIX_BTMAP_END + TOTAL_FIX_BTMAPS - 1,
|
|
|
|
/*
|
|
* Used for kernel page table creation, so unmapped memory may be used
|
|
* for tables.
|
|
*/
|
|
FIX_PTE,
|
|
FIX_PMD,
|
|
FIX_PUD,
|
|
FIX_PGD,
|
|
|
|
__end_of_fixed_addresses
|
|
};
|
|
|
|
#define FIXADDR_SIZE (__end_of_permanent_fixed_addresses << PAGE_SHIFT)
|
|
#define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE)
|
|
|
|
#define FIXMAP_PAGE_IO __pgprot(PROT_DEVICE_nGnRE)
|
|
|
|
void __init early_fixmap_init(void);
|
|
|
|
#define __early_set_fixmap __set_fixmap
|
|
|
|
#define __late_set_fixmap __set_fixmap
|
|
#define __late_clear_fixmap(idx) __set_fixmap((idx), 0, FIXMAP_PAGE_CLEAR)
|
|
|
|
extern void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot);
|
|
|
|
#include <asm-generic/fixmap.h>
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
#endif /* _ASM_ARM64_FIXMAP_H */
|