51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
#ifndef _ASM_FIXMAP_H
|
|
#define _ASM_FIXMAP_H
|
|
|
|
#include <linux/kernel.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/kmap_types.h>
|
|
|
|
#define FIXADDR_START 0xffc00000UL
|
|
#define FIXADDR_END 0xfff00000UL
|
|
#define FIXADDR_TOP (FIXADDR_END - PAGE_SIZE)
|
|
|
|
/*
|
|
* 224 temporary boot-time mappings, used by early_ioremap(),
|
|
* before ioremap() is functional.
|
|
*
|
|
* (P)re-using the FIXADDR region, which is used for highmem
|
|
* later on, and statically aligned to 1MB.
|
|
*/
|
|
#define NR_FIX_BTMAPS 32
|
|
#define FIX_BTMAPS_SLOTS 7
|
|
#define TOTAL_FIX_BTMAPS (NR_FIX_BTMAPS * FIX_BTMAPS_SLOTS)
|
|
|
|
enum fixed_addresses {
|
|
FIX_EARLYCON_MEM_BASE,
|
|
__end_of_permanent_fixed_addresses,
|
|
FIX_BTMAP_END = __end_of_permanent_fixed_addresses,
|
|
FIX_BTMAP_BEGIN = FIX_BTMAP_END + TOTAL_FIX_BTMAPS - 1,
|
|
|
|
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_fixed_addresses = (FIXADDR_END - FIXADDR_START) >> PAGE_SHIFT,
|
|
};
|
|
|
|
#define FIXMAP_PAGE_COMMON (L_PTE_YOUNG | L_PTE_PRESENT | L_PTE_XN)
|
|
|
|
#define FIXMAP_PAGE_NORMAL (FIXMAP_PAGE_COMMON | L_PTE_MT_WRITEBACK)
|
|
#define FIXMAP_PAGE_IO (FIXMAP_PAGE_COMMON | L_PTE_MT_DEV_SHARED | L_PTE_SHARED | L_PTE_DIRTY)
|
|
#define FIXMAP_PAGE_NOCACHE FIXMAP_PAGE_IO
|
|
|
|
extern void __early_set_fixmap(enum fixed_addresses idx,
|
|
phys_addr_t phys, pgprot_t flags);
|
|
|
|
void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot);
|
|
|
|
#include <asm-generic/fixmap.h>
|
|
|
|
#endif
|