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)  * fixmap.h: compile-time virtual memory allocation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright (C) 1998 Ingo Molnar
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * Copyright 2008 Freescale Semiconductor Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  *   Port to powerpc added by Kumar Gala
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  * Copyright 2011 Michal Simek <monstr@monstr.eu>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)  * Copyright 2011 PetaLogix Qld Pty Ltd
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)  *   Port to Microblaze
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #ifndef _ASM_FIXMAP_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #define _ASM_FIXMAP_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #ifndef __ASSEMBLY__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <asm/page.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #ifdef CONFIG_HIGHMEM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/threads.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <asm/kmap_types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define FIXADDR_TOP	((unsigned long)(-PAGE_SIZE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)  * Here we define all the compile-time 'special' virtual
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)  * addresses. The point is to have a constant address at
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)  * compile time, but to set the physical address only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)  * in the boot process. We allocate these special addresses
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)  * from the end of virtual memory (0xfffff000) backwards.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)  * Also this lets us do fail-safe vmalloc(), we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)  * can guarantee that these special addresses and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)  * vmalloc()-ed addresses never overlap.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)  * these 'compile-time allocated' memory buffers are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)  * fixed-size 4k pages. (or larger if used with an increment
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)  * highger than 1) use fixmap_set(idx,phys) to associate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)  * physical memory with fixmap indices.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)  * TLB entries of such buffers will not be flushed across
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)  * task switches.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) enum fixed_addresses {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	FIX_HOLE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #ifdef CONFIG_HIGHMEM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	FIX_KMAP_BEGIN,	/* reserved pte's for temporary kernel mappings */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	FIX_KMAP_END = FIX_KMAP_BEGIN + (KM_TYPE_NR * num_possible_cpus()) - 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	__end_of_fixed_addresses
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) extern void __set_fixmap(enum fixed_addresses idx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 					phys_addr_t phys, pgprot_t flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #define __FIXADDR_SIZE	(__end_of_fixed_addresses << PAGE_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #define FIXADDR_START		(FIXADDR_TOP - __FIXADDR_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) #define FIXMAP_PAGE_NOCACHE PAGE_KERNEL_CI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) #include <asm-generic/fixmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) #endif /* !__ASSEMBLY__ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #endif