1 /* 2 * RedBoot firmware support 3 * 4 * Author: Scott Wood <scottwood@freescale.com> 5 * 6 * Copyright (c) 2007 Freescale Semiconductor, Inc. 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License version 2 as published 10 * by the Free Software Foundation. 11 */ 12 13 #include "ops.h" 14 #include "stdio.h" 15 #include "redboot.h" 16 #include "fsl-soc.h" 17 #include "io.h" 18 19 static bd_t bd; 20 BSS_STACK(4096); 21 22 #define MHZ(x) ((x + 500000) / 1000000) 23 24 static void platform_fixups(void) 25 { 26 void *node; 27 28 dt_fixup_memory(bd.bi_memstart, bd.bi_memsize); 29 dt_fixup_mac_addresses(bd.bi_enetaddr); 30 dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 16, bd.bi_busfreq); 31 32 node = finddevice("/soc/cpm/brg"); 33 if (node) { 34 printf("BRG clock-frequency <- 0x%x (%dMHz)\r\n", 35 bd.bi_busfreq, MHZ(bd.bi_busfreq)); 36 setprop(node, "clock-frequency", &bd.bi_busfreq, 4); 37 } 38 } 39 40 void platform_init(unsigned long r3, unsigned long r4, unsigned long r5, 41 unsigned long r6, unsigned long r7) 42 { 43 memcpy(&bd, (char *)r3, sizeof(bd)); 44 45 if (bd.bi_tag != 0x42444944) 46 return; 47 48 simple_alloc_init(_end, 49 bd.bi_memstart + bd.bi_memsize - (unsigned long)_end, 50 32, 64); 51 52 fdt_init(_dtb_start); 53 serial_console_init(); 54 platform_ops.fixups = platform_fixups; 55 56 loader_info.cmdline = (char *)bd.bi_cmdline; 57 loader_info.cmdline_len = strlen((char *)bd.bi_cmdline); 58 } 59