boot.h

  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 __ASSEMBLER__
 10
 11#include <linux/printk.h>
 12#include <asm/physmem_info.h>
 13#include <asm/stacktrace.h>
 14
 15struct vmlinux_info {
 16	unsigned long entry;
 17	unsigned long image_size;	/* does not include .bss */
 18	unsigned long bss_size;		/* uncompressed image .bss size */
 19	unsigned long bootdata_off;
 20	unsigned long bootdata_size;
 21	unsigned long bootdata_preserved_off;
 22	unsigned long bootdata_preserved_size;
 23	unsigned long got_start;
 24	unsigned long got_end;
 25	unsigned long amode31_size;
 26	unsigned long init_mm_off;
 27	unsigned long swapper_pg_dir_off;
 28	unsigned long invalid_pg_dir_off;
 29	unsigned long alt_instructions;
 30	unsigned long alt_instructions_end;
 31#ifdef CONFIG_STACKPROTECTOR
 32	unsigned long stack_prot_start;
 33	unsigned long stack_prot_end;
 34#endif
 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
 44void startup_kernel(void);
 45unsigned long detect_max_physmem_end(void);
 46void detect_physmem_online_ranges(unsigned long max_physmem_end);
 47void physmem_set_usable_limit(unsigned long limit);
 48void physmem_reserve(enum reserved_range_type type, unsigned long addr, unsigned long size);
 49void physmem_free(enum reserved_range_type type);
 50/* for continuous/multiple allocations per type */
 51unsigned long physmem_alloc_or_die(enum reserved_range_type type, unsigned long size,
 52				   unsigned long align);
 53unsigned long physmem_alloc(enum reserved_range_type type, unsigned long size,
 54			    unsigned long align, bool die_on_oom);
 55/* for single allocations, 1 per type */
 56unsigned long physmem_alloc_range(enum reserved_range_type type, unsigned long size,
 57				  unsigned long align, unsigned long min, unsigned long max,
 58				  bool die_on_oom);
 59unsigned long get_physmem_alloc_pos(void);
 60void dump_physmem_reserved(void);
 61bool ipl_report_certs_intersects(unsigned long addr, unsigned long size,
 62				 unsigned long *intersection_start);
 63bool is_ipl_block_dump(void);
 64void store_ipl_parmblock(void);
 65int read_ipl_report(void);
 66void save_ipl_cert_comp_list(void);
 67void setup_boot_command_line(void);
 68void parse_boot_command_line(void);
 69void verify_facilities(void);
 70void print_missing_facilities(void);
 71void sclp_early_setup_buffer(void);
 72void alt_debug_setup(char *str);
 73void do_pgm_check(struct pt_regs *regs);
 74unsigned long randomize_within_range(unsigned long size, unsigned long align,
 75				     unsigned long min, unsigned long max);
 76void setup_vmem(unsigned long kernel_start, unsigned long kernel_end, unsigned long asce_limit);
 77int __printf(1, 2) boot_printk(const char *fmt, ...);
 78void print_stacktrace(unsigned long sp);
 79void error(char *m);
 80int get_random(unsigned long limit, unsigned long *value);
 81void boot_rb_dump(void);
 82void __noreturn jump_to_kernel(psw_t *psw);
 83
 84#ifndef boot_fmt
 85#define boot_fmt(fmt)	fmt
 86#endif
 87
 88#define boot_emerg(fmt, ...)	boot_printk(KERN_EMERG boot_fmt(fmt), ##__VA_ARGS__)
 89#define boot_alert(fmt, ...)	boot_printk(KERN_ALERT boot_fmt(fmt), ##__VA_ARGS__)
 90#define boot_crit(fmt, ...)	boot_printk(KERN_CRIT boot_fmt(fmt), ##__VA_ARGS__)
 91#define boot_err(fmt, ...)	boot_printk(KERN_ERR boot_fmt(fmt), ##__VA_ARGS__)
 92#define boot_warn(fmt, ...)	boot_printk(KERN_WARNING boot_fmt(fmt), ##__VA_ARGS__)
 93#define boot_notice(fmt, ...)	boot_printk(KERN_NOTICE boot_fmt(fmt), ##__VA_ARGS__)
 94#define boot_info(fmt, ...)	boot_printk(KERN_INFO boot_fmt(fmt), ##__VA_ARGS__)
 95#define boot_debug(fmt, ...)	boot_printk(KERN_DEBUG boot_fmt(fmt), ##__VA_ARGS__)
 96
 97#define boot_panic(...) do {				\
 98	boot_emerg(__VA_ARGS__);			\
 99	print_stacktrace(current_frame_address());	\
100	boot_emerg(" -- System halted\n");		\
101	disabled_wait();				\
102} while (0)
103
104extern struct machine_info machine;
105extern int boot_console_loglevel;
106extern bool boot_ignore_loglevel;
107
108/* Symbols defined by linker scripts */
109extern const char kernel_version[];
110extern unsigned long memory_limit;
111extern unsigned long vmalloc_size;
112extern int vmalloc_size_set;
113extern char __boot_data_start[], __boot_data_end[];
114extern char __boot_data_preserved_start[], __boot_data_preserved_end[];
115extern char __vmlinux_relocs_64_start[], __vmlinux_relocs_64_end[];
116extern char _decompressor_syms_start[], _decompressor_syms_end[];
117extern char _stack_start[], _stack_end[];
118extern char _end[], _decompressor_end[];
119extern unsigned char _compressed_start[];
120extern unsigned char _compressed_end[];
121extern struct vmlinux_info _vmlinux_info;
122
123#define vmlinux _vmlinux_info
124
125#define __lowcore_pa(x)		((unsigned long)(x) % sizeof(struct lowcore))
126#define __abs_lowcore_pa(x)	(((unsigned long)(x) - __abs_lowcore) % sizeof(struct lowcore))
127#define __kernel_va(x)		((void *)((unsigned long)(x) - __kaslr_offset_phys + __kaslr_offset))
128#define __kernel_pa(x)		((unsigned long)(x) - __kaslr_offset + __kaslr_offset_phys)
129#define __identity_va(x)	((void *)((unsigned long)(x) + __identity_base))
130#define __identity_pa(x)	((unsigned long)(x) - __identity_base)
131
132static inline bool intersects(unsigned long addr0, unsigned long size0,
133			      unsigned long addr1, unsigned long size1)
134{
135	return addr0 + size0 > addr1 && addr1 + size1 > addr0;
136}
137#endif /* __ASSEMBLER__ */
138#endif /* BOOT_BOOT_H */