2 * Copyright (C) Paul Mackerras 1997.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
22 /* Value picked to match that used by yaboot */
23 #define PROG_START 0x01400000 /* only used on 64-bit systems */
24 #define RAM_END (512<<20) /* Fixme: use OF */
25 #define ONE_MB 0x100000
29 static unsigned long claim_base;
31 static void *of_try_claim(unsigned long size)
33 unsigned long addr = 0;
36 claim_base = _ALIGN_UP((unsigned long)_end, ONE_MB);
38 for(; claim_base < RAM_END; claim_base += ONE_MB) {
40 printf(" trying: 0x%08lx\n\r", claim_base);
42 addr = (unsigned long)of_claim(claim_base, size, 0);
43 if ((void *)addr != (void *)-1)
48 claim_base = PAGE_ALIGN(claim_base + size);
52 static void of_image_hdr(const void *hdr)
54 const Elf64_Ehdr *elf64 = hdr;
56 if (elf64->e_ident[EI_CLASS] == ELFCLASS64) {
58 * Maintain a "magic" minimum address. This keeps some older
59 * firmware platforms running.
61 if (claim_base < PROG_START)
62 claim_base = PROG_START;
66 void platform_init(unsigned long a1, unsigned long a2, void *promptr)
68 platform_ops.image_hdr = of_image_hdr;
69 platform_ops.malloc = of_try_claim;
70 platform_ops.exit = of_exit;
71 platform_ops.vmlinux_alloc = of_vmlinux_alloc;
73 dt_ops.finddevice = of_finddevice;
74 dt_ops.getprop = of_getprop;
75 dt_ops.setprop = of_setprop;
80 loader_info.promptr = promptr;
81 if (a1 && a2 && a2 != 0xdeadbeef) {
82 loader_info.initrd_addr = a1;
83 loader_info.initrd_size = a2;