powerpc/boot/redboot-8xx.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * RedBoot firmware support
0004  *
0005  * Author: Scott Wood <scottwood@freescale.com>
0006  *
0007  * Copyright (c) 2007 Freescale Semiconductor, Inc.
0008  */
0009
0010 #include "ops.h"
0011 #include "stdio.h"
0012 #include "redboot.h"
0013 #include "fsl-soc.h"
0014 #include "io.h"
0015
0016 static bd_t bd;
0017 BSS_STACK(4096);
0018
0019 #define MHZ(x)  ((x + 500000) / 1000000)
0020
0021 static void platform_fixups(void)
0022 {
0023     void *node;
0024
0025     dt_fixup_memory(bd.bi_memstart, bd.bi_memsize);
0026     dt_fixup_mac_addresses(bd.bi_enetaddr);
0027     dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 16, bd.bi_busfreq);
0028
0029     node = finddevice("/soc/cpm/brg");
0030     if (node) {
0031         printf("BRG clock-frequency <- 0x%x (%dMHz)\r\n",
0032                bd.bi_busfreq, MHZ(bd.bi_busfreq));
0033         setprop(node, "clock-frequency",  &bd.bi_busfreq, 4);
0034     }
0035 }
0036
0037 void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
0038                    unsigned long r6, unsigned long r7)
0039 {
0040     memcpy(&bd, (char *)r3, sizeof(bd));
0041
0042     if (bd.bi_tag != 0x42444944)
0043         return;
0044
0045     simple_alloc_init(_end,
0046                       bd.bi_memstart + bd.bi_memsize - (unsigned long)_end,
0047                       32, 64);
0048
0049     fdt_init(_dtb_start);
0050     serial_console_init();
0051     platform_ops.fixups = platform_fixups;
0052
0053     loader_info.cmdline = (char *)bd.bi_cmdline;
0054     loader_info.cmdline_len = strlen((char *)bd.bi_cmdline);
0055 }