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