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
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