arch/s390/boot/boot.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef BOOT_BOOT_H
#define BOOT_BOOT_H

#include <linux/types.h>

#define IPL_START	0x200

#ifndef __ASSEMBLER__

#include <linux/printk.h>
#include <asm/physmem_info.h>
#include <asm/stacktrace.h>

struct vmlinux_info {
	unsigned long entry;
	unsigned long image_size;	/* does not include .bss */
	unsigned long bss_size;		/* uncompressed image .bss size */
	unsigned long bootdata_off;
	unsigned long bootdata_size;
	unsigned long bootdata_preserved_off;
	unsigned long bootdata_preserved_size;
	unsigned long got_start;
	unsigned long got_end;
	unsigned long amode31_size;
	unsigned long init_mm_off;
	unsigned long swapper_pg_dir_off;
	unsigned long invalid_pg_dir_off;
	unsigned long alt_instructions;
	unsigned long alt_instructions_end;
#ifdef CONFIG_STACKPROTECTOR
	unsigned long stack_prot_start;
	unsigned long stack_prot_end;
#endif
#ifdef CONFIG_KASAN
	unsigned long kasan_early_shadow_page_off;
	unsigned long kasan_early_shadow_pte_off;
	unsigned long kasan_early_shadow_pmd_off;
	unsigned long kasan_early_shadow_pud_off;
	unsigned long kasan_early_shadow_p4d_off;
#endif
};

void startup_kernel(void);
unsigned long detect_max_physmem_end(void);
void detect_physmem_online_ranges(unsigned long max_physmem_end);
void physmem_set_usable_limit(unsigned long limit);
void physmem_reserve(enum reserved_range_type type, unsigned long addr, unsigned long size);
void physmem_free(enum reserved_range_type type);
/* for continuous/multiple allocations per type */
unsigned long physmem_alloc_or_die(enum reserved_range_type type, unsigned long size,
				   unsigned long align);
unsigned long physmem_alloc(enum reserved_range_type type, unsigned long size,
			    unsigned long align, bool die_on_oom);
/* for single allocations, 1 per type */
unsigned long physmem_alloc_range(enum reserved_range_type type, unsigned long size,
				  unsigned long align, unsigned long min, unsigned long max,
				  bool die_on_oom);
unsigned long get_physmem_alloc_pos(void);
void dump_physmem_reserved(void);
bool ipl_report_certs_intersects(unsigned long addr, unsigned long size,
				 unsigned long *intersection_start);
bool is_ipl_block_dump(void);
void store_ipl_parmblock(void);
int read_ipl_report(void);
void save_ipl_cert_comp_list(void);
void setup_boot_command_line(void);
void parse_boot_command_line(void);
void verify_facilities(void);
void print_missing_facilities(void);
void sclp_early_setup_buffer(void);
void alt_debug_setup(char *str);
void do_pgm_check(struct pt_regs *regs);
unsigned long randomize_within_range(unsigned long size, unsigned long align,
				     unsigned long min, unsigned long max);
void setup_vmem(unsigned long kernel_start, unsigned long kernel_end, unsigned long asce_limit);
int __printf(1, 2) boot_printk(const char *fmt, ...);
void print_stacktrace(unsigned long sp);
void error(char *m);
int get_random(unsigned long limit, unsigned long *value);
void boot_rb_dump(void);
void __noreturn jump_to_kernel(psw_t *psw);

#ifndef boot_fmt
#define boot_fmt(fmt)	fmt
#endif

#define boot_emerg(fmt, ...)	boot_printk(KERN_EMERG boot_fmt(fmt), ##__VA_ARGS__)
#define boot_alert(fmt, ...)	boot_printk(KERN_ALERT boot_fmt(fmt), ##__VA_ARGS__)
#define boot_crit(fmt, ...)	boot_printk(KERN_CRIT boot_fmt(fmt), ##__VA_ARGS__)
#define boot_err(fmt, ...)	boot_printk(KERN_ERR boot_fmt(fmt), ##__VA_ARGS__)
#define boot_warn(fmt, ...)	boot_printk(KERN_WARNING boot_fmt(fmt), ##__VA_ARGS__)
#define boot_notice(fmt, ...)	boot_printk(KERN_NOTICE boot_fmt(fmt), ##__VA_ARGS__)
#define boot_info(fmt, ...)	boot_printk(KERN_INFO boot_fmt(fmt), ##__VA_ARGS__)
#define boot_debug(fmt, ...)	boot_printk(KERN_DEBUG boot_fmt(fmt), ##__VA_ARGS__)

#define boot_panic(...) do {				\
	boot_emerg(__VA_ARGS__);			\
	print_stacktrace(current_frame_address());	\
	boot_emerg(" -- System halted\n");		\
	disabled_wait();				\
} while (0)

extern struct machine_info machine;
extern int boot_console_loglevel;
extern bool boot_ignore_loglevel;

/* Symbols defined by linker scripts */
extern const char kernel_version[];
extern unsigned long memory_limit;
extern unsigned long vmalloc_size;
extern int vmalloc_size_set;
extern char __boot_data_start[], __boot_data_end[];
extern char __boot_data_preserved_start[], __boot_data_preserved_end[];
extern char __vmlinux_relocs_64_start[], __vmlinux_relocs_64_end[];
extern char _decompressor_syms_start[], _decompressor_syms_end[];
extern char _stack_start[], _stack_end[];
extern char _end[], _decompressor_end[];
extern unsigned char _compressed_start[];
extern unsigned char _compressed_end[];
extern struct vmlinux_info _vmlinux_info;

#define vmlinux _vmlinux_info

#define __lowcore_pa(x)		((unsigned long)(x) % sizeof(struct lowcore))
#define __abs_lowcore_pa(x)	(((unsigned long)(x) - __abs_lowcore) % sizeof(struct lowcore))
#define __kernel_va(x)		((void *)((unsigned long)(x) - __kaslr_offset_phys + __kaslr_offset))
#define __kernel_pa(x)		((unsigned long)(x) - __kaslr_offset + __kaslr_offset_phys)
#define __identity_va(x)	((void *)((unsigned long)(x) + __identity_base))
#define __identity_pa(x)	((unsigned long)(x) - __identity_base)

static inline bool intersects(unsigned long addr0, unsigned long size0,
			      unsigned long addr1, unsigned long size1)
{
	return addr0 + size0 > addr1 && addr1 + size1 > addr0;
}
#endif /* __ASSEMBLER__ */
#endif /* BOOT_BOOT_H */