1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * RedBoot firmware support
4 *
5 * Author: Scott Wood <scottwood@freescale.com>
6 *
7 * Copyright (c) 2007 Freescale Semiconductor, Inc.
8 */
9
10 #include "ops.h"
11 #include "stdio.h"
12 #include "redboot.h"
13 #include "fsl-soc.h"
14 #include "io.h"
15
16 static bd_t bd;
17 BSS_STACK(4096);
18
19 #define MHZ(x) ((x + 500000) / 1000000)
20
21 static void platform_fixups(void)
22 {
23 void *node;
24
25 dt_fixup_memory(bd.bi_memstart, bd.bi_memsize);
26 dt_fixup_mac_addresses(bd.bi_enetaddr);
27 dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 16, bd.bi_busfreq);
28
29 node = finddevice("/soc/cpm/brg");
30 if (node) {
31 printf("BRG clock-frequency <- 0x%x (%dMHz)\r\n",
32 bd.bi_busfreq, MHZ(bd.bi_busfreq));
33 setprop(node, "clock-frequency", &bd.bi_busfreq, 4);
34 }
35 }
36
37 void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
38 unsigned long r6, unsigned long r7)
39 {
40 memcpy(&bd, (char *)r3, sizeof(bd));
41
42 if (bd.bi_tag != 0x42444944)
43 return;
44
45 simple_alloc_init(_end,
46 bd.bi_memstart + bd.bi_memsize - (unsigned long)_end,
47 32, 64);
48
49 fdt_init(_dtb_start);
50 serial_console_init();
51 platform_ops.fixups = platform_fixups;
52
53 loader_info.cmdline = (char *)bd.bi_cmdline;
54 loader_info.cmdline_len = strlen((char *)bd.bi_cmdline);
55 }
56
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