18f75582aSVasily Gorbik // SPDX-License-Identifier: GPL-2.0 28f75582aSVasily Gorbik #include <linux/string.h> 315426ca4SVasily Gorbik #include <asm/setup.h> 47516fc11SVasily Gorbik #include <asm/sclp.h> 58f75582aSVasily Gorbik #include "compressed/decompressor.h" 68f75582aSVasily Gorbik #include "boot.h" 78f75582aSVasily Gorbik 8d1b52a43SVasily Gorbik extern char __boot_data_start[], __boot_data_end[]; 9bf9921a9SGerald Schaefer extern char __boot_data_preserved_start[], __boot_data_preserved_end[]; 10d1b52a43SVasily Gorbik 117516fc11SVasily Gorbik void error(char *x) 127516fc11SVasily Gorbik { 137516fc11SVasily Gorbik sclp_early_printk("\n\n"); 147516fc11SVasily Gorbik sclp_early_printk(x); 157516fc11SVasily Gorbik sclp_early_printk("\n\n -- System halted"); 167516fc11SVasily Gorbik 177516fc11SVasily Gorbik disabled_wait(0xdeadbeef); 187516fc11SVasily Gorbik } 197516fc11SVasily Gorbik 2015426ca4SVasily Gorbik #ifdef CONFIG_KERNEL_UNCOMPRESSED 2115426ca4SVasily Gorbik unsigned long mem_safe_offset(void) 2215426ca4SVasily Gorbik { 2315426ca4SVasily Gorbik return vmlinux.default_lma + vmlinux.image_size + vmlinux.bss_size; 2415426ca4SVasily Gorbik } 2515426ca4SVasily Gorbik #endif 2615426ca4SVasily Gorbik 2715426ca4SVasily Gorbik static void rescue_initrd(void) 2815426ca4SVasily Gorbik { 2915426ca4SVasily Gorbik unsigned long min_initrd_addr; 3015426ca4SVasily Gorbik 3115426ca4SVasily Gorbik if (!IS_ENABLED(CONFIG_BLK_DEV_INITRD)) 3215426ca4SVasily Gorbik return; 3315426ca4SVasily Gorbik if (!INITRD_START || !INITRD_SIZE) 3415426ca4SVasily Gorbik return; 3515426ca4SVasily Gorbik min_initrd_addr = mem_safe_offset(); 3615426ca4SVasily Gorbik if (min_initrd_addr <= INITRD_START) 3715426ca4SVasily Gorbik return; 3815426ca4SVasily Gorbik memmove((void *)min_initrd_addr, (void *)INITRD_START, INITRD_SIZE); 3915426ca4SVasily Gorbik INITRD_START = min_initrd_addr; 4015426ca4SVasily Gorbik } 4115426ca4SVasily Gorbik 42d1b52a43SVasily Gorbik static void copy_bootdata(void) 43d1b52a43SVasily Gorbik { 44d1b52a43SVasily Gorbik if (__boot_data_end - __boot_data_start != vmlinux.bootdata_size) 45d1b52a43SVasily Gorbik error(".boot.data section size mismatch"); 46d1b52a43SVasily Gorbik memcpy((void *)vmlinux.bootdata_off, __boot_data_start, vmlinux.bootdata_size); 47bf9921a9SGerald Schaefer if (__boot_data_preserved_end - __boot_data_preserved_start != vmlinux.bootdata_preserved_size) 48bf9921a9SGerald Schaefer error(".boot.preserved.data section size mismatch"); 49bf9921a9SGerald Schaefer memcpy((void *)vmlinux.bootdata_preserved_off, __boot_data_preserved_start, vmlinux.bootdata_preserved_size); 50d1b52a43SVasily Gorbik } 51d1b52a43SVasily Gorbik 528f75582aSVasily Gorbik void startup_kernel(void) 538f75582aSVasily Gorbik { 54369f91c3SVasily Gorbik void *img; 558f75582aSVasily Gorbik 5615426ca4SVasily Gorbik rescue_initrd(); 5717aacfbfSVasily Gorbik sclp_early_read_info(); 5849698745SVasily Gorbik store_ipl_parmblock(); 5949698745SVasily Gorbik setup_boot_command_line(); 60b5e80459SVasily Gorbik parse_boot_command_line(); 6149698745SVasily Gorbik setup_memory_end(); 626966d604SVasily Gorbik detect_memory(); 638f75582aSVasily Gorbik if (!IS_ENABLED(CONFIG_KERNEL_UNCOMPRESSED)) { 64369f91c3SVasily Gorbik img = decompress_kernel(); 65369f91c3SVasily Gorbik memmove((void *)vmlinux.default_lma, img, vmlinux.image_size); 668f75582aSVasily Gorbik } 67d1b52a43SVasily Gorbik copy_bootdata(); 68369f91c3SVasily Gorbik vmlinux.entry(); 698f75582aSVasily Gorbik } 70