1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef BOOT_COMPRESSED_MISC_H 3 #define BOOT_COMPRESSED_MISC_H 4 5 /* 6 * Special hack: we have to be careful, because no indirections are allowed here, 7 * and paravirt_ops is a kind of one. As it will only run in baremetal anyway, 8 * we just keep it from happening. (This list needs to be extended when new 9 * paravirt and debugging variants are added.) 10 */ 11 #undef CONFIG_PARAVIRT 12 #undef CONFIG_PARAVIRT_XXL 13 #undef CONFIG_PARAVIRT_SPINLOCKS 14 #undef CONFIG_KASAN 15 #undef CONFIG_KASAN_GENERIC 16 17 #define __NO_FORTIFY 18 19 /* cpu_feature_enabled() cannot be used this early */ 20 #define USE_EARLY_PGTABLE_L5 21 22 #include <linux/linkage.h> 23 #include <linux/screen_info.h> 24 #include <linux/elf.h> 25 #include <linux/io.h> 26 #include <asm/page.h> 27 #include <asm/boot.h> 28 #include <asm/bootparam.h> 29 #include <asm/desc_defs.h> 30 31 #define BOOT_CTYPE_H 32 #include <linux/acpi.h> 33 34 #define BOOT_BOOT_H 35 #include "../ctype.h" 36 37 #ifdef CONFIG_X86_64 38 #define memptr long 39 #else 40 #define memptr unsigned 41 #endif 42 43 /* boot/compressed/vmlinux start and end markers */ 44 extern char _head[], _end[]; 45 46 /* misc.c */ 47 extern memptr free_mem_ptr; 48 extern memptr free_mem_end_ptr; 49 void *malloc(int size); 50 void free(void *where); 51 extern struct boot_params *boot_params; 52 void __putstr(const char *s); 53 void __puthex(unsigned long value); 54 #define error_putstr(__x) __putstr(__x) 55 #define error_puthex(__x) __puthex(__x) 56 57 #ifdef CONFIG_X86_VERBOSE_BOOTUP 58 59 #define debug_putstr(__x) __putstr(__x) 60 #define debug_puthex(__x) __puthex(__x) 61 #define debug_putaddr(__x) { \ 62 debug_putstr(#__x ": 0x"); \ 63 debug_puthex((unsigned long)(__x)); \ 64 debug_putstr("\n"); \ 65 } 66 67 #else 68 69 static inline void debug_putstr(const char *s) 70 { } 71 static inline void debug_puthex(unsigned long value) 72 { } 73 #define debug_putaddr(x) /* */ 74 75 #endif 76 77 /* cmdline.c */ 78 int cmdline_find_option(const char *option, char *buffer, int bufsize); 79 int cmdline_find_option_bool(const char *option); 80 81 struct mem_vector { 82 u64 start; 83 u64 size; 84 }; 85 86 #ifdef CONFIG_RANDOMIZE_BASE 87 /* kaslr.c */ 88 void choose_random_location(unsigned long input, 89 unsigned long input_size, 90 unsigned long *output, 91 unsigned long output_size, 92 unsigned long *virt_addr); 93 #else 94 static inline void choose_random_location(unsigned long input, 95 unsigned long input_size, 96 unsigned long *output, 97 unsigned long output_size, 98 unsigned long *virt_addr) 99 { 100 } 101 #endif 102 103 /* cpuflags.c */ 104 bool has_cpuflag(int flag); 105 106 #ifdef CONFIG_X86_64 107 extern int set_page_decrypted(unsigned long address); 108 extern int set_page_encrypted(unsigned long address); 109 extern int set_page_non_present(unsigned long address); 110 extern unsigned char _pgtable[]; 111 #endif 112 113 #ifdef CONFIG_EARLY_PRINTK 114 /* early_serial_console.c */ 115 extern int early_serial_base; 116 void console_init(void); 117 #else 118 static const int early_serial_base; 119 static inline void console_init(void) 120 { } 121 #endif 122 123 void set_sev_encryption_mask(void); 124 125 #ifdef CONFIG_AMD_MEM_ENCRYPT 126 void sev_es_shutdown_ghcb(void); 127 extern bool sev_es_check_ghcb_fault(unsigned long address); 128 #else 129 static inline void sev_es_shutdown_ghcb(void) { } 130 static inline bool sev_es_check_ghcb_fault(unsigned long address) 131 { 132 return false; 133 } 134 #endif 135 136 /* acpi.c */ 137 #ifdef CONFIG_ACPI 138 acpi_physical_address get_rsdp_addr(void); 139 #else 140 static inline acpi_physical_address get_rsdp_addr(void) { return 0; } 141 #endif 142 143 #if defined(CONFIG_RANDOMIZE_BASE) && defined(CONFIG_MEMORY_HOTREMOVE) && defined(CONFIG_ACPI) 144 extern struct mem_vector immovable_mem[MAX_NUMNODES*2]; 145 int count_immovable_mem_regions(void); 146 #else 147 static inline int count_immovable_mem_regions(void) { return 0; } 148 #endif 149 150 /* ident_map_64.c */ 151 #ifdef CONFIG_X86_5LEVEL 152 extern unsigned int __pgtable_l5_enabled, pgdir_shift, ptrs_per_p4d; 153 #endif 154 155 /* Used by PAGE_KERN* macros: */ 156 extern pteval_t __default_kernel_pte_mask; 157 158 /* idt_64.c */ 159 extern gate_desc boot_idt[BOOT_IDT_ENTRIES]; 160 extern struct desc_ptr boot_idt_desc; 161 162 #ifdef CONFIG_X86_64 163 void cleanup_exception_handling(void); 164 #else 165 static inline void cleanup_exception_handling(void) { } 166 #endif 167 168 /* IDT Entry Points */ 169 void boot_page_fault(void); 170 void boot_stage1_vc(void); 171 void boot_stage2_vc(void); 172 173 unsigned long sev_verify_cbit(unsigned long cr3); 174 175 #endif /* BOOT_COMPRESSED_MISC_H */ 176