1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef BOOT_BOOT_H 3 #define BOOT_BOOT_H 4 5 #include <linux/types.h> 6 7 #define IPL_START 0x200 8 9 #ifndef __ASSEMBLY__ 10 11 #include <asm/physmem_info.h> 12 13 struct machine_info { 14 unsigned char has_edat1 : 1; 15 unsigned char has_edat2 : 1; 16 unsigned char has_nx : 1; 17 }; 18 19 struct vmlinux_info { 20 unsigned long entry; 21 unsigned long image_size; /* does not include .bss */ 22 unsigned long bss_size; /* uncompressed image .bss size */ 23 unsigned long bootdata_off; 24 unsigned long bootdata_size; 25 unsigned long bootdata_preserved_off; 26 unsigned long bootdata_preserved_size; 27 unsigned long got_start; 28 unsigned long got_end; 29 unsigned long amode31_size; 30 unsigned long init_mm_off; 31 unsigned long swapper_pg_dir_off; 32 unsigned long invalid_pg_dir_off; 33 unsigned long alt_instructions; 34 unsigned long alt_instructions_end; 35 #ifdef CONFIG_KASAN 36 unsigned long kasan_early_shadow_page_off; 37 unsigned long kasan_early_shadow_pte_off; 38 unsigned long kasan_early_shadow_pmd_off; 39 unsigned long kasan_early_shadow_pud_off; 40 unsigned long kasan_early_shadow_p4d_off; 41 #endif 42 }; 43 44 void startup_kernel(void); 45 unsigned long detect_max_physmem_end(void); 46 void detect_physmem_online_ranges(unsigned long max_physmem_end); 47 void physmem_set_usable_limit(unsigned long limit); 48 void physmem_reserve(enum reserved_range_type type, unsigned long addr, unsigned long size); 49 void physmem_free(enum reserved_range_type type); 50 /* for continuous/multiple allocations per type */ 51 unsigned long physmem_alloc_top_down(enum reserved_range_type type, unsigned long size, 52 unsigned long align); 53 /* for single allocations, 1 per type */ 54 unsigned long physmem_alloc_range(enum reserved_range_type type, unsigned long size, 55 unsigned long align, unsigned long min, unsigned long max, 56 bool die_on_oom); 57 unsigned long get_physmem_alloc_pos(void); 58 bool ipl_report_certs_intersects(unsigned long addr, unsigned long size, 59 unsigned long *intersection_start); 60 bool is_ipl_block_dump(void); 61 void store_ipl_parmblock(void); 62 int read_ipl_report(void); 63 void save_ipl_cert_comp_list(void); 64 void setup_boot_command_line(void); 65 void parse_boot_command_line(void); 66 void verify_facilities(void); 67 void print_missing_facilities(void); 68 void sclp_early_setup_buffer(void); 69 void print_pgm_check_info(void); 70 unsigned long randomize_within_range(unsigned long size, unsigned long align, 71 unsigned long min, unsigned long max); 72 void setup_vmem(unsigned long kernel_start, unsigned long kernel_end, unsigned long asce_limit); 73 void __printf(1, 2) decompressor_printk(const char *fmt, ...); 74 void print_stacktrace(unsigned long sp); 75 void error(char *m); 76 int get_random(unsigned long limit, unsigned long *value); 77 78 extern struct machine_info machine; 79 80 /* Symbols defined by linker scripts */ 81 extern const char kernel_version[]; 82 extern unsigned long memory_limit; 83 extern unsigned long vmalloc_size; 84 extern int vmalloc_size_set; 85 extern char __boot_data_start[], __boot_data_end[]; 86 extern char __boot_data_preserved_start[], __boot_data_preserved_end[]; 87 extern char __vmlinux_relocs_64_start[], __vmlinux_relocs_64_end[]; 88 extern char _decompressor_syms_start[], _decompressor_syms_end[]; 89 extern char _stack_start[], _stack_end[]; 90 extern char _end[], _decompressor_end[]; 91 extern unsigned char _compressed_start[]; 92 extern unsigned char _compressed_end[]; 93 extern struct vmlinux_info _vmlinux_info; 94 95 #define vmlinux _vmlinux_info 96 97 #define __lowcore_pa(x) ((unsigned long)(x) % sizeof(struct lowcore)) 98 #define __abs_lowcore_pa(x) (((unsigned long)(x) - __abs_lowcore) % sizeof(struct lowcore)) 99 #define __kernel_va(x) ((void *)((unsigned long)(x) - __kaslr_offset_phys + __kaslr_offset)) 100 #define __kernel_pa(x) ((unsigned long)(x) - __kaslr_offset + __kaslr_offset_phys) 101 #define __identity_va(x) ((void *)((unsigned long)(x) + __identity_base)) 102 #define __identity_pa(x) ((unsigned long)(x) - __identity_base) 103 104 static inline bool intersects(unsigned long addr0, unsigned long size0, 105 unsigned long addr1, unsigned long size1) 106 { 107 return addr0 + size0 > addr1 && addr1 + size1 > addr0; 108 } 109 #endif /* __ASSEMBLY__ */ 110 #endif /* BOOT_BOOT_H */ 111