Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  * Early init before relocation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <asm/setup.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <asm/sections.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <asm/asm-prototypes.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)  * We're called here very early in the boot.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)  * Note that the kernel may be running at an address which is different
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)  * from the address that it was linked at, so we must use RELOC/PTRRELOC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)  * to access static data (including strings).  -- paulus
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) notrace unsigned long __init early_init(unsigned long dt_ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	unsigned long kva, offset = reloc_offset();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	kva = *PTRRELOC(&kernstart_virt_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	/* First zero the BSS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	if (kva == KERNELBASE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 		memset(PTRRELOC(&__bss_start), 0, __bss_stop - __bss_start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	 * Identify the CPU type and fix up code sections
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	 * that depend on which cpu we have.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	identify_cpu(offset, mfspr(SPRN_PVR));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	apply_feature_fixups();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	return kva + offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) }