Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2)  * fixmap.h: compile-time virtual memory allocation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * This file is subject to the terms and conditions of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * License.  See the file "COPYING" in the main directory of this archive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * Copyright (C) 1998 Ingo Molnar
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  * x86_32 and x86_64 integration by Gustavo F. Padovan, February 2009
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #ifndef _ASM_X86_FIXMAP_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #define _ASM_X86_FIXMAP_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18)  * Exposed to assembly code for setting up initial page tables. Cannot be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19)  * calculated in assembly code (fixmap entries are an enum), but is sanity
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20)  * checked in the actual fixmap C code to make sure that the fixmap is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21)  * covered fully.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #define FIXMAP_PMD_NUM	2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) /* fixmap starts downwards from the 507th entry in level2_fixmap_pgt */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #define FIXMAP_PMD_TOP	507
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #ifndef __ASSEMBLY__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #include <asm/apicdef.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #include <asm/page.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #include <asm/pgtable_types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #ifdef CONFIG_X86_32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #include <linux/threads.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) #include <asm/kmap_types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #include <uapi/asm/vsyscall.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) #endif
^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)  * We can't declare FIXADDR_TOP as variable for x86_64 because vsyscall
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41)  * uses fixmaps that relies on FIXADDR_TOP for proper address calculation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42)  * Because of this, FIXADDR_TOP x86 integration was left as later work.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) #ifdef CONFIG_X86_32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46)  * Leave one empty page between vmalloc'ed areas and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47)  * the start of the fixmap.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) extern unsigned long __FIXADDR_TOP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) #define FIXADDR_TOP	((unsigned long)__FIXADDR_TOP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) #define FIXADDR_TOP	(round_up(VSYSCALL_ADDR + PAGE_SIZE, 1<<PMD_SHIFT) - \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 			 PAGE_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57)  * Here we define all the compile-time 'special' virtual
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58)  * addresses. The point is to have a constant address at
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59)  * compile time, but to set the physical address only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60)  * in the boot process.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61)  * for x86_32: We allocate these special addresses
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62)  * from the end of virtual memory (0xfffff000) backwards.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63)  * Also this lets us do fail-safe vmalloc(), we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64)  * can guarantee that these special addresses and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65)  * vmalloc()-ed addresses never overlap.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67)  * These 'compile-time allocated' memory buffers are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68)  * fixed-size 4k pages (or larger if used with an increment
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69)  * higher than 1). Use set_fixmap(idx,phys) to associate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70)  * physical memory with fixmap indices.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72)  * TLB entries of such buffers will not be flushed across
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73)  * task switches.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) enum fixed_addresses {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) #ifdef CONFIG_X86_32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	FIX_HOLE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) #ifdef CONFIG_X86_VSYSCALL_EMULATION
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	VSYSCALL_PAGE = (FIXADDR_TOP - VSYSCALL_ADDR) >> PAGE_SHIFT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	FIX_DBGP_BASE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	FIX_EARLYCON_MEM_BASE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	FIX_OHCI1394_BASE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) #ifdef CONFIG_X86_LOCAL_APIC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	FIX_APIC_BASE,	/* local (CPU) APIC) -- required for SMP or not */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) #ifdef CONFIG_X86_IO_APIC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	FIX_IO_APIC_BASE_0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	FIX_IO_APIC_BASE_END = FIX_IO_APIC_BASE_0 + MAX_IO_APICS - 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) #ifdef CONFIG_X86_32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	FIX_KMAP_BEGIN,	/* reserved pte's for temporary kernel mappings */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	FIX_KMAP_END = FIX_KMAP_BEGIN+(KM_TYPE_NR*NR_CPUS)-1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) #ifdef CONFIG_PCI_MMCONFIG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	FIX_PCIE_MCFG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) #ifdef CONFIG_PARAVIRT_XXL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	FIX_PARAVIRT_BOOTMAP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) #ifdef	CONFIG_X86_INTEL_MID
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	FIX_LNW_VRTC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) #ifdef CONFIG_ACPI_APEI_GHES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	/* Used for GHES mapping from assorted contexts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	FIX_APEI_GHES_IRQ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	FIX_APEI_GHES_NMI,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	__end_of_permanent_fixed_addresses,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	 * 512 temporary boot-time mappings, used by early_ioremap(),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	 * before ioremap() is functional.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	 * If necessary we round it up to the next 512 pages boundary so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	 * that we can have a single pmd entry and a single pte table:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) #define NR_FIX_BTMAPS		64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) #define FIX_BTMAPS_SLOTS	8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) #define TOTAL_FIX_BTMAPS	(NR_FIX_BTMAPS * FIX_BTMAPS_SLOTS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	FIX_BTMAP_END =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	 (__end_of_permanent_fixed_addresses ^
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	  (__end_of_permanent_fixed_addresses + TOTAL_FIX_BTMAPS - 1)) &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	 -PTRS_PER_PTE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	 ? __end_of_permanent_fixed_addresses + TOTAL_FIX_BTMAPS -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	   (__end_of_permanent_fixed_addresses & (TOTAL_FIX_BTMAPS - 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	 : __end_of_permanent_fixed_addresses,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	FIX_BTMAP_BEGIN = FIX_BTMAP_END + TOTAL_FIX_BTMAPS - 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) #ifdef CONFIG_X86_32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	FIX_WP_TEST,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) #ifdef CONFIG_INTEL_TXT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	FIX_TBOOT_BASE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	__end_of_fixed_addresses
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) extern void reserve_top_address(unsigned long reserve);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) #define FIXADDR_SIZE		(__end_of_permanent_fixed_addresses << PAGE_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) #define FIXADDR_START		(FIXADDR_TOP - FIXADDR_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) #define FIXADDR_TOT_SIZE	(__end_of_fixed_addresses << PAGE_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) #define FIXADDR_TOT_START	(FIXADDR_TOP - FIXADDR_TOT_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) extern int fixmaps_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) extern pte_t *kmap_pte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) extern pte_t *pkmap_page_table;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) void __native_set_fixmap(enum fixed_addresses idx, pte_t pte);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) void native_set_fixmap(unsigned /* enum fixed_addresses */ idx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		       phys_addr_t phys, pgprot_t flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) #ifndef CONFIG_PARAVIRT_XXL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) static inline void __set_fixmap(enum fixed_addresses idx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 				phys_addr_t phys, pgprot_t flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	native_set_fixmap(idx, phys, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)  * FIXMAP_PAGE_NOCACHE is used for MMIO. Memory encryption is not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)  * supported for MMIO addresses, so make sure that the memory encryption
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)  * mask is not part of the page attributes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) #define FIXMAP_PAGE_NOCACHE PAGE_KERNEL_IO_NOCACHE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)  * Early memremap routines used for in-place encryption. The mappings created
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)  * by these routines are intended to be used as temporary mappings.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) void __init *early_memremap_encrypted(resource_size_t phys_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 				      unsigned long size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) void __init *early_memremap_encrypted_wp(resource_size_t phys_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 					 unsigned long size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) void __init *early_memremap_decrypted(resource_size_t phys_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 				      unsigned long size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) void __init *early_memremap_decrypted_wp(resource_size_t phys_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 					 unsigned long size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) #include <asm-generic/fixmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) #define __late_set_fixmap(idx, phys, flags) __set_fixmap(idx, phys, flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) #define __late_clear_fixmap(idx) __set_fixmap(idx, 0, __pgprot(0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) void __early_set_fixmap(enum fixed_addresses idx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 			phys_addr_t phys, pgprot_t flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) #endif /* !__ASSEMBLY__ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) #endif /* _ASM_X86_FIXMAP_H */