1 /* 2 * Bootwrapper for ePAPR compliant firmwares 3 * 4 * Copyright 2010 David Gibson <david@gibson.dropbear.id.au>, IBM Corporation. 5 * 6 * Based on earlier bootwrappers by: 7 * (c) Benjamin Herrenschmidt <benh@kernel.crashing.org>, IBM Corp,\ 8 * and 9 * Scott Wood <scottwood@freescale.com> 10 * Copyright (c) 2007 Freescale Semiconductor, Inc. 11 * 12 * This program is free software; you can redistribute it and/or modify it 13 * under the terms of the GNU General Public License version 2 as published 14 * by the Free Software Foundation. 15 */ 16 17 #include "ops.h" 18 #include "stdio.h" 19 #include "io.h" 20 #include <libfdt.h> 21 22 BSS_STACK(4096); 23 24 #define EPAPR_SMAGIC 0x65504150 25 #define EPAPR_EMAGIC 0x45504150 26 27 static unsigned epapr_magic; 28 static unsigned long ima_size; 29 static unsigned long fdt_addr; 30 31 static void platform_fixups(void) 32 { 33 if ((epapr_magic != EPAPR_EMAGIC) 34 && (epapr_magic != EPAPR_SMAGIC)) 35 fatal("r6 contained 0x%08x instead of ePAPR magic number\n", 36 epapr_magic); 37 38 if (ima_size < (unsigned long)_end) 39 printf("WARNING: Image loaded outside IMA!" 40 " (_end=%p, ima_size=0x%lx)\n", _end, ima_size); 41 if (ima_size < fdt_addr) 42 printf("WARNING: Device tree address is outside IMA!" 43 "(fdt_addr=0x%lx, ima_size=0x%lx)\n", fdt_addr, 44 ima_size); 45 if (ima_size < fdt_addr + fdt_totalsize((void *)fdt_addr)) 46 printf("WARNING: Device tree extends outside IMA!" 47 " (fdt_addr=0x%lx, size=0x%x, ima_size=0x%lx\n", 48 fdt_addr, fdt_totalsize((void *)fdt_addr), ima_size); 49 } 50 51 void epapr_platform_init(unsigned long r3, unsigned long r4, unsigned long r5, 52 unsigned long r6, unsigned long r7) 53 { 54 epapr_magic = r6; 55 ima_size = r7; 56 fdt_addr = r3; 57 58 /* FIXME: we should process reserve entries */ 59 60 simple_alloc_init(_end, ima_size - (unsigned long)_end, 32, 64); 61 62 fdt_init((void *)fdt_addr); 63 64 serial_console_init(); 65 platform_ops.fixups = platform_fixups; 66 } 67