| // SPDX-License-Identifier: GPL-2.0 |
| |
| /* |
| * Early init before relocation |
| */ |
| |
| #include <linux/init.h> |
| #include <linux/kernel.h> |
| #include <asm/setup.h> |
| #include <asm/sections.h> |
| #include <asm/asm-prototypes.h> |
| |
| /* |
| * We're called here very early in the boot. |
| * |
| * Note that the kernel may be running at an address which is different |
| * from the address that it was linked at, so we must use RELOC/PTRRELOC |
| * to access static data (including strings). -- paulus |
| */ |
| notrace unsigned long __init early_init(unsigned long dt_ptr) |
| { |
| unsigned long kva, offset = reloc_offset(); |
| |
| kva = *PTRRELOC(&kernstart_virt_addr); |
| |
| /* First zero the BSS */ |
| if (kva == KERNELBASE) |
| memset(PTRRELOC(&__bss_start), 0, __bss_stop - __bss_start); |
| |
| /* |
| * Identify the CPU type and fix up code sections |
| * that depend on which cpu we have. |
| */ |
| identify_cpu(offset, mfspr(SPRN_PVR)); |
| |
| apply_feature_fixups(); |
| |
| return kva + offset; |
| } |
