xref: /linux/arch/s390/boot/boot.h (revision d163d60258c755845cbc9cfe0e45fca71e649488)
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 #ifdef CONFIG_KASAN
34 	unsigned long kasan_early_shadow_page_off;
35 	unsigned long kasan_early_shadow_pte_off;
36 	unsigned long kasan_early_shadow_pmd_off;
37 	unsigned long kasan_early_shadow_pud_off;
38 	unsigned long kasan_early_shadow_p4d_off;
39 #endif
40 };
41 
42 void startup_kernel(void);
43 unsigned long detect_max_physmem_end(void);
44 void detect_physmem_online_ranges(unsigned long max_physmem_end);
45 void physmem_set_usable_limit(unsigned long limit);
46 void physmem_reserve(enum reserved_range_type type, unsigned long addr, unsigned long size);
47 void physmem_free(enum reserved_range_type type);
48 /* for continuous/multiple allocations per type */
49 unsigned long physmem_alloc_top_down(enum reserved_range_type type, unsigned long size,
50 				     unsigned long align);
51 /* for single allocations, 1 per type */
52 unsigned long physmem_alloc_range(enum reserved_range_type type, unsigned long size,
53 				  unsigned long align, unsigned long min, unsigned long max,
54 				  bool die_on_oom);
55 unsigned long get_physmem_alloc_pos(void);
56 bool ipl_report_certs_intersects(unsigned long addr, unsigned long size,
57 				 unsigned long *intersection_start);
58 bool is_ipl_block_dump(void);
59 void store_ipl_parmblock(void);
60 int read_ipl_report(void);
61 void save_ipl_cert_comp_list(void);
62 void setup_boot_command_line(void);
63 void parse_boot_command_line(void);
64 void verify_facilities(void);
65 void print_missing_facilities(void);
66 void sclp_early_setup_buffer(void);
67 void print_pgm_check_info(void);
68 unsigned long randomize_within_range(unsigned long size, unsigned long align,
69 				     unsigned long min, unsigned long max);
70 void setup_vmem(unsigned long kernel_start, unsigned long kernel_end, unsigned long asce_limit);
71 void __printf(1, 2) decompressor_printk(const char *fmt, ...);
72 void print_stacktrace(unsigned long sp);
73 void error(char *m);
74 int get_random(unsigned long limit, unsigned long *value);
75 
76 extern struct machine_info machine;
77 
78 /* Symbols defined by linker scripts */
79 extern const char kernel_version[];
80 extern unsigned long memory_limit;
81 extern unsigned long vmalloc_size;
82 extern int vmalloc_size_set;
83 extern char __boot_data_start[], __boot_data_end[];
84 extern char __boot_data_preserved_start[], __boot_data_preserved_end[];
85 extern char __vmlinux_relocs_64_start[], __vmlinux_relocs_64_end[];
86 extern char _decompressor_syms_start[], _decompressor_syms_end[];
87 extern char _stack_start[], _stack_end[];
88 extern char _end[], _decompressor_end[];
89 extern unsigned char _compressed_start[];
90 extern unsigned char _compressed_end[];
91 extern struct vmlinux_info _vmlinux_info;
92 #define vmlinux _vmlinux_info
93 
94 #define __abs_lowcore_pa(x)	(((unsigned long)(x) - __abs_lowcore) % sizeof(struct lowcore))
95 #define __kernel_va(x)		((void *)((unsigned long)(x) - __kaslr_offset_phys + __kaslr_offset))
96 #define __kernel_pa(x)		((unsigned long)(x) - __kaslr_offset + __kaslr_offset_phys)
97 #define __identity_va(x)	((void *)((unsigned long)(x) + __identity_base))
98 #define __identity_pa(x)	((unsigned long)(x) - __identity_base)
99 
100 static inline bool intersects(unsigned long addr0, unsigned long size0,
101 			      unsigned long addr1, unsigned long size1)
102 {
103 	return addr0 + size0 > addr1 && addr1 + size1 > addr0;
104 }
105 #endif /* __ASSEMBLY__ */
106 #endif /* BOOT_BOOT_H */
107