Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * highmem.h: virtual kernel memory mappings for high memory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Used in CONFIG_HIGHMEM systems for memory pages which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * are not addressable by direct kernel virtual addresses.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  * Copyright (C) 1999 Gerhard Wichert, Siemens AG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  *		      Gerhard.Wichert@pdb.siemens.de
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)  * Redesigned the x86 32-bit VM architecture to deal with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)  * up to 16 Terabyte physical memory. With current x86 CPUs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)  * we now support up to 64 Gigabytes physical RAM.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)  * Copyright (C) 1999 Ingo Molnar <mingo@redhat.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #ifndef _ASM_X86_HIGHMEM_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define _ASM_X86_HIGHMEM_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #ifdef __KERNEL__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/threads.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <asm/kmap_types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <asm/tlbflush.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <asm/paravirt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <asm/fixmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) /* declarations for highmem.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) extern unsigned long highstart_pfn, highend_pfn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)  * Right now we initialize only a single pte table. It can be extended
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)  * easily, subsequent pte tables have to be allocated in one physical
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)  * chunk of RAM.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)  * Ordering is:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)  * high memory on:			              high_memory off:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)  *    FIXADDR_TOP                                        FIXADDR_TOP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)  *        fixed addresses                                    fixed addresses
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)  *    FIXADDR_START                                      FIXADDR_START
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)  *        temp fixed addresses/persistent kmap area      VMALLOC_END
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)  *    PKMAP_BASE                                             temp fixed addresses/vmalloc area
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)  *    VMALLOC_END                                        VMALLOC_START
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)  *        vmalloc area                                   high_memory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)  *    VMALLOC_START
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)  *    high_memory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)  * The temp fixed area is only used during boot for early_ioremap(), and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)  * it is unused when the ioremap() is functional. vmalloc/pkmap area become
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)  * available after early boot so the temp fixed area is available for re-use.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #define LAST_PKMAP_MASK (LAST_PKMAP-1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #define PKMAP_NR(virt)  ((virt-PKMAP_BASE) >> PAGE_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #define PKMAP_ADDR(nr)  (PKMAP_BASE + ((nr) << PAGE_SHIFT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) void *kmap_atomic_pfn(unsigned long pfn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) void *kmap_atomic_prot_pfn(unsigned long pfn, pgprot_t prot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) #define flush_cache_kmaps()	do { } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) extern void add_highpages_with_active_regions(int nid, unsigned long start_pfn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 					unsigned long end_pfn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) #endif /* __KERNEL__ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) #endif /* _ASM_X86_HIGHMEM_H */