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[]; 9d1b52a43SVasily Gorbik 107516fc11SVasily Gorbik void error(char *x) 117516fc11SVasily Gorbik { 127516fc11SVasily Gorbik sclp_early_printk("\n\n"); 137516fc11SVasily Gorbik sclp_early_printk(x); 147516fc11SVasily Gorbik sclp_early_printk("\n\n -- System halted"); 157516fc11SVasily Gorbik 167516fc11SVasily Gorbik disabled_wait(0xdeadbeef); 177516fc11SVasily Gorbik } 187516fc11SVasily Gorbik 1915426ca4SVasily Gorbik #ifdef CONFIG_KERNEL_UNCOMPRESSED 2015426ca4SVasily Gorbik unsigned long mem_safe_offset(void) 2115426ca4SVasily Gorbik { 2215426ca4SVasily Gorbik return vmlinux.default_lma + vmlinux.image_size + vmlinux.bss_size; 2315426ca4SVasily Gorbik } 2415426ca4SVasily Gorbik #endif 2515426ca4SVasily Gorbik 2615426ca4SVasily Gorbik static void rescue_initrd(void) 2715426ca4SVasily Gorbik { 2815426ca4SVasily Gorbik unsigned long min_initrd_addr; 2915426ca4SVasily Gorbik 3015426ca4SVasily Gorbik if (!IS_ENABLED(CONFIG_BLK_DEV_INITRD)) 3115426ca4SVasily Gorbik return; 3215426ca4SVasily Gorbik if (!INITRD_START || !INITRD_SIZE) 3315426ca4SVasily Gorbik return; 3415426ca4SVasily Gorbik min_initrd_addr = mem_safe_offset(); 3515426ca4SVasily Gorbik if (min_initrd_addr <= INITRD_START) 3615426ca4SVasily Gorbik return; 3715426ca4SVasily Gorbik memmove((void *)min_initrd_addr, (void *)INITRD_START, INITRD_SIZE); 3815426ca4SVasily Gorbik INITRD_START = min_initrd_addr; 3915426ca4SVasily Gorbik } 4015426ca4SVasily Gorbik 41d1b52a43SVasily Gorbik static void copy_bootdata(void) 42d1b52a43SVasily Gorbik { 43d1b52a43SVasily Gorbik if (__boot_data_end - __boot_data_start != vmlinux.bootdata_size) 44d1b52a43SVasily Gorbik error(".boot.data section size mismatch"); 45d1b52a43SVasily Gorbik memcpy((void *)vmlinux.bootdata_off, __boot_data_start, vmlinux.bootdata_size); 46d1b52a43SVasily Gorbik } 47d1b52a43SVasily Gorbik 488f75582aSVasily Gorbik void startup_kernel(void) 498f75582aSVasily Gorbik { 50369f91c3SVasily Gorbik void *img; 518f75582aSVasily Gorbik 5215426ca4SVasily Gorbik rescue_initrd(); 5317aacfbfSVasily Gorbik sclp_early_read_info(); 5449698745SVasily Gorbik store_ipl_parmblock(); 5549698745SVasily Gorbik setup_boot_command_line(); 5649698745SVasily Gorbik setup_memory_end(); 576966d604SVasily Gorbik detect_memory(); 588f75582aSVasily Gorbik if (!IS_ENABLED(CONFIG_KERNEL_UNCOMPRESSED)) { 59369f91c3SVasily Gorbik img = decompress_kernel(); 60369f91c3SVasily Gorbik memmove((void *)vmlinux.default_lma, img, vmlinux.image_size); 618f75582aSVasily Gorbik } 62d1b52a43SVasily Gorbik copy_bootdata(); 63369f91c3SVasily Gorbik vmlinux.entry(); 648f75582aSVasily Gorbik } 65