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(start: bd.bi_memstart, size: bd.bi_memsize); |
26 | dt_fixup_mac_addresses(bd.bi_enetaddr); |
27 | dt_fixup_cpu_clocks(cpufreq: bd.bi_intfreq, tbfreq: bd.bi_busfreq / 16, busfreq: bd.bi_busfreq); |
28 | |
29 | node = finddevice(name: "/soc/cpm/brg" ); |
30 | if (node) { |
31 | printf(fmt: "BRG clock-frequency <- 0x%x (%dMHz)\r\n" , |
32 | bd.bi_busfreq, MHZ(bd.bi_busfreq)); |
33 | setprop(devp: node, name: "clock-frequency" , buf: &bd.bi_busfreq, buflen: 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(dest: &bd, src: (char *)r3, n: sizeof(bd)); |
41 | |
42 | if (bd.bi_tag != 0x42444944) |
43 | return; |
44 | |
45 | simple_alloc_init(base: _end, |
46 | heap_size: bd.bi_memstart + bd.bi_memsize - (unsigned long)_end, |
47 | granularity: 32, max_allocs: 64); |
48 | |
49 | fdt_init(blob: _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 | |