// SPDX-License-Identifier: GPL-2.0 #include <linux/string.h> #include <asm/setup.h> #include <asm/sclp.h> #include "compressed/decompressor.h" #include "boot.h" extern char __boot_data_start[], __boot_data_end[]; void error(char *x) { sclp_early_printk("\n\n"); sclp_early_printk(x); sclp_early_printk("\n\n -- System halted"); disabled_wait(0xdeadbeef); } #ifdef CONFIG_KERNEL_UNCOMPRESSED unsigned long mem_safe_offset(void) { return vmlinux.default_lma + vmlinux.image_size + vmlinux.bss_size; } #endif static void rescue_initrd(void) { unsigned long min_initrd_addr; if (!IS_ENABLED(CONFIG_BLK_DEV_INITRD)) return; if (!INITRD_START || !INITRD_SIZE) return; min_initrd_addr = mem_safe_offset(); if (min_initrd_addr <= INITRD_START) return; memmove((void *)min_initrd_addr, (void *)INITRD_START, INITRD_SIZE); INITRD_START = min_initrd_addr; } static void copy_bootdata(void) { if (__boot_data_end - __boot_data_start != vmlinux.bootdata_size) error(".boot.data section size mismatch"); memcpy((void *)vmlinux.bootdata_off, __boot_data_start, vmlinux.bootdata_size); } void startup_kernel(void) { void *img; rescue_initrd(); sclp_early_read_info(); store_ipl_parmblock(); setup_boot_command_line(); parse_boot_command_line(); setup_memory_end(); detect_memory(); if (!IS_ENABLED(CONFIG_KERNEL_UNCOMPRESSED)) { img = decompress_kernel(); memmove((void *)vmlinux.default_lma, img, vmlinux.image_size); } copy_bootdata(); vmlinux.entry(); }