Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Bootwrapper for ePAPR compliant firmwares
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright 2010 David Gibson <david@gibson.dropbear.id.au>, IBM Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * Based on earlier bootwrappers by:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  * (c) Benjamin Herrenschmidt <benh@kernel.crashing.org>, IBM Corp,\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  *   and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  * Scott Wood <scottwood@freescale.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)  * Copyright (c) 2007 Freescale Semiconductor, Inc.
^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) #include "ops.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include "stdio.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include "io.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <libfdt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) BSS_STACK(4096);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define EPAPR_SMAGIC	0x65504150
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define EPAPR_EMAGIC	0x45504150
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) static unsigned epapr_magic;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) static unsigned long ima_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static unsigned long fdt_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) static void platform_fixups(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	if ((epapr_magic != EPAPR_EMAGIC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	    && (epapr_magic != EPAPR_SMAGIC))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 		fatal("r6 contained 0x%08x instead of ePAPR magic number\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 		      epapr_magic);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	if (ima_size < (unsigned long)_end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 		printf("WARNING: Image loaded outside IMA!"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 		       " (_end=%p, ima_size=0x%lx)\n", _end, ima_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	if (ima_size < fdt_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 		printf("WARNING: Device tree address is outside IMA!"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 		       "(fdt_addr=0x%lx, ima_size=0x%lx)\n", fdt_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 		       ima_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	if (ima_size < fdt_addr + fdt_totalsize((void *)fdt_addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 		printf("WARNING: Device tree extends outside IMA!"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 		       " (fdt_addr=0x%lx, size=0x%x, ima_size=0x%lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 		       fdt_addr, fdt_totalsize((void *)fdt_addr), ima_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) void epapr_platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 			 unsigned long r6, unsigned long r7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	epapr_magic = r6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	ima_size = r7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	fdt_addr = r3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	/* FIXME: we should process reserve entries */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	simple_alloc_init(_end, ima_size - (unsigned long)_end, 32, 64);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	fdt_init((void *)fdt_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	serial_console_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	platform_ops.fixups = platform_fixups;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) }