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