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 static void *of_vmlinux_alloc(unsigned long size)
68 void *p = malloc(size);
71 fatal("Can't allocate memory for kernel image!\n\r");
77 * OF device tree routines
79 static void *of_finddevice(const char *name)
81 return (phandle) of_call_prom("finddevice", 1, 1, name);
84 static int of_getprop(const void *phandle, const char *name, void *buf,
87 return of_call_prom("getprop", 4, 1, phandle, name, buf, buflen);
90 static int of_setprop(const void *phandle, const char *name, const void *buf,
93 return of_call_prom("setprop", 4, 1, phandle, name, buf, buflen);
96 void platform_init(unsigned long a1, unsigned long a2, void *promptr)
98 platform_ops.image_hdr = of_image_hdr;
99 platform_ops.malloc = of_try_claim;
100 platform_ops.exit = of_exit;
101 platform_ops.vmlinux_alloc = of_vmlinux_alloc;
103 dt_ops.finddevice = of_finddevice;
104 dt_ops.getprop = of_getprop;
105 dt_ops.setprop = of_setprop;
110 loader_info.promptr = promptr;
111 if (a1 && a2 && a2 != 0xdeadbeef) {
112 loader_info.initrd_addr = a1;
113 loader_info.initrd_size = a2;