67 lines
1.8 KiB
C
67 lines
1.8 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||
|
|
#ifndef _ASM_FIXMAP_H
|
||
|
|
#define _ASM_FIXMAP_H
|
||
|
|
|
||
|
|
#define FIXADDR_START 0xffc00000UL
|
||
|
|
#define FIXADDR_END 0xfff00000UL
|
||
|
|
#define FIXADDR_TOP (FIXADDR_END - PAGE_SIZE)
|
||
|
|
|
||
|
|
#include <asm/kmap_types.h>
|
||
|
|
#include <asm/pgtable.h>
|
||
|
|
|
||
|
|
enum fixed_addresses {
|
||
|
|
FIX_EARLYCON_MEM_BASE,
|
||
|
|
__end_of_permanent_fixed_addresses,
|
||
|
|
|
||
|
|
FIX_KMAP_BEGIN = __end_of_permanent_fixed_addresses,
|
||
|
|
FIX_KMAP_END = FIX_KMAP_BEGIN + (KM_TYPE_NR * NR_CPUS) - 1,
|
||
|
|
|
||
|
|
/* Support writing RO kernel text via kprobes, jump labels, etc. */
|
||
|
|
FIX_TEXT_POKE0,
|
||
|
|
FIX_TEXT_POKE1,
|
||
|
|
|
||
|
|
__end_of_fixmap_region,
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Share the kmap() region with early_ioremap(): this is guaranteed
|
||
|
|
* not to clash since early_ioremap() is only available before
|
||
|
|
* paging_init(), and kmap() only after.
|
||
|
|
*/
|
||
|
|
#define NR_FIX_BTMAPS 32
|
||
|
|
#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,
|
||
|
|
__end_of_early_ioremap_region
|
||
|
|
};
|
||
|
|
|
||
|
|
static const enum fixed_addresses __end_of_fixed_addresses =
|
||
|
|
__end_of_fixmap_region > __end_of_early_ioremap_region ?
|
||
|
|
__end_of_fixmap_region : __end_of_early_ioremap_region;
|
||
|
|
|
||
|
|
#define FIXMAP_PAGE_COMMON (L_PTE_YOUNG | L_PTE_PRESENT | L_PTE_XN | L_PTE_DIRTY)
|
||
|
|
|
||
|
|
#define FIXMAP_PAGE_NORMAL (pgprot_kernel | L_PTE_XN)
|
||
|
|
#define FIXMAP_PAGE_RO (FIXMAP_PAGE_NORMAL | L_PTE_RDONLY)
|
||
|
|
|
||
|
|
/* Used by set_fixmap_(io|nocache), both meant for mapping a device */
|
||
|
|
#define FIXMAP_PAGE_IO (FIXMAP_PAGE_COMMON | L_PTE_MT_DEV_SHARED | L_PTE_SHARED)
|
||
|
|
#define FIXMAP_PAGE_NOCACHE FIXMAP_PAGE_IO
|
||
|
|
|
||
|
|
#define __early_set_fixmap __set_fixmap
|
||
|
|
|
||
|
|
#ifdef CONFIG_MMU
|
||
|
|
|
||
|
|
void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot);
|
||
|
|
void __init early_fixmap_init(void);
|
||
|
|
|
||
|
|
#include <asm-generic/fixmap.h>
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
static inline void early_fixmap_init(void) { }
|
||
|
|
|
||
|
|
#endif
|
||
|
|
#endif
|