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 16 /* cpu_feature_enabled() cannot be used this early */ 17 #define USE_EARLY_PGTABLE_L5 18 19 #include <linux/linkage.h> 20 #include <linux/screen_info.h> 21 #include <linux/elf.h> 22 #include <linux/io.h> 23 #include <asm/page.h> 24 #include <asm/boot.h> 25 #include <asm/bootparam.h> 26 #include <asm/desc_defs.h> 27 28 #define BOOT_CTYPE_H 29 #include <linux/acpi.h> 30 31 #define BOOT_BOOT_H 32 #include "../ctype.h" 33 34 #ifdef CONFIG_X86_64 35 #define memptr long 36 #else 37 #define memptr unsigned 38 #endif 39 40 /* boot/compressed/vmlinux start and end markers */ 41 extern char _head[], _end[]; 42 43 /* misc.c */ 44 extern memptr free_mem_ptr; 45 extern memptr free_mem_end_ptr; 46 extern struct boot_params *boot_params; 47 void __putstr(const char *s); 48 void __puthex(unsigned long value); 49 #define error_putstr(__x) __putstr(__x) 50 #define error_puthex(__x) __puthex(__x) 51 52 #ifdef CONFIG_X86_VERBOSE_BOOTUP 53 54 #define debug_putstr(__x) __putstr(__x) 55 #define debug_puthex(__x) __puthex(__x) 56 #define debug_putaddr(__x) { \ 57 debug_putstr(#__x ": 0x"); \ 58 debug_puthex((unsigned long)(__x)); \ 59 debug_putstr("\n"); \ 60 } 61 62 #else 63 64 static inline void debug_putstr(const char *s) 65 { } 66 static inline void debug_puthex(unsigned long value) 67 { } 68 #define debug_putaddr(x) /* */ 69 70 #endif 71 72 /* cmdline.c */ 73 int cmdline_find_option(const char *option, char *buffer, int bufsize); 74 int cmdline_find_option_bool(const char *option); 75 76 struct mem_vector { 77 u64 start; 78 u64 size; 79 }; 80 81 #if CONFIG_RANDOMIZE_BASE 82 /* kaslr.c */ 83 void choose_random_location(unsigned long input, 84 unsigned long input_size, 85 unsigned long *output, 86 unsigned long output_size, 87 unsigned long *virt_addr); 88 #else 89 static inline void choose_random_location(unsigned long input, 90 unsigned long input_size, 91 unsigned long *output, 92 unsigned long output_size, 93 unsigned long *virt_addr) 94 { 95 } 96 #endif 97 98 /* cpuflags.c */ 99 bool has_cpuflag(int flag); 100 101 #ifdef CONFIG_X86_64 102 extern int set_page_decrypted(unsigned long address); 103 extern int set_page_encrypted(unsigned long address); 104 extern int set_page_non_present(unsigned long address); 105 extern unsigned char _pgtable[]; 106 #endif 107 108 #ifdef CONFIG_EARLY_PRINTK 109 /* early_serial_console.c */ 110 extern int early_serial_base; 111 void console_init(void); 112 #else 113 static const int early_serial_base; 114 static inline void console_init(void) 115 { } 116 #endif 117 118 void set_sev_encryption_mask(void); 119 120 #ifdef CONFIG_AMD_MEM_ENCRYPT 121 void sev_es_shutdown_ghcb(void); 122 extern bool sev_es_check_ghcb_fault(unsigned long address); 123 #else 124 static inline void sev_es_shutdown_ghcb(void) { } 125 static inline bool sev_es_check_ghcb_fault(unsigned long address) 126 { 127 return false; 128 } 129 #endif 130 131 /* acpi.c */ 132 #ifdef CONFIG_ACPI 133 acpi_physical_address get_rsdp_addr(void); 134 #else 135 static inline acpi_physical_address get_rsdp_addr(void) { return 0; } 136 #endif 137 138 #if defined(CONFIG_RANDOMIZE_BASE) && defined(CONFIG_MEMORY_HOTREMOVE) && defined(CONFIG_ACPI) 139 extern struct mem_vector immovable_mem[MAX_NUMNODES*2]; 140 int count_immovable_mem_regions(void); 141 #else 142 static inline int count_immovable_mem_regions(void) { return 0; } 143 #endif 144 145 /* ident_map_64.c */ 146 #ifdef CONFIG_X86_5LEVEL 147 extern unsigned int __pgtable_l5_enabled, pgdir_shift, ptrs_per_p4d; 148 #endif 149 150 /* Used by PAGE_KERN* macros: */ 151 extern pteval_t __default_kernel_pte_mask; 152 153 /* idt_64.c */ 154 extern gate_desc boot_idt[BOOT_IDT_ENTRIES]; 155 extern struct desc_ptr boot_idt_desc; 156 157 /* IDT Entry Points */ 158 void boot_page_fault(void); 159 void boot_stage1_vc(void); 160 void boot_stage2_vc(void); 161 162 unsigned long sev_verify_cbit(unsigned long cr3); 163 164 #endif /* BOOT_COMPRESSED_MISC_H */ 165