1/* 2 * RedBoot firmware support 3 * 4 * Author: Scott Wood <scottwood@freescale.com> 5 * 6 * Copyright (c) 2007 Freescale Semiconductor, Inc. 7 * Copyright (c) 2008 Codehermit 8 * 9 * This program is free software; you can redistribute it and/or modify it 10 * under the terms of the GNU General Public License version 2 as published 11 * by the Free Software Foundation. 12 */ 13 14#include "ops.h" 15#include "stdio.h" 16#include "redboot.h" 17#include "fsl-soc.h" 18#include "io.h" 19 20static bd_t bd; 21BSS_STACK(4096); 22 23#define MHZ(x) ((x + 500000) / 1000000) 24 25static void platform_fixups(void) 26{ 27 void *node; 28 29 dt_fixup_memory(bd.bi_memstart, bd.bi_memsize); 30 dt_fixup_mac_addresses(bd.bi_enetaddr); 31 dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 16, bd.bi_busfreq); 32 33 node = finddevice("/soc/cpm/brg"); 34 if (node) { 35 printf("BRG clock-frequency <- 0x%x (%dMHz)\r\n", 36 bd.bi_busfreq, MHZ(bd.bi_busfreq)); 37 setprop(node, "clock-frequency", &bd.bi_busfreq, 4); 38 } 39 40} 41 42void platform_init(unsigned long r3, unsigned long r4, unsigned long r5, 43 unsigned long r6, unsigned long r7) 44{ 45 memcpy(&bd, (char *)r3, sizeof(bd)); 46 47 if (bd.bi_tag != 0x42444944) 48 return; 49 50 simple_alloc_init(_end, 51 bd.bi_memstart + bd.bi_memsize - (unsigned long)_end, 52 32, 64); 53 54 fdt_init(_dtb_start); 55 serial_console_init(); 56 platform_ops.fixups = platform_fixups; 57 58 loader_info.cmdline = (char *)bd.bi_cmdline; 59 loader_info.cmdline_len = strlen((char *)bd.bi_cmdline); 60} 61