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 | * Copyright (c) 2008 Codehermit |
9 | */ |
10 | |
11 | #include "ops.h" |
12 | #include "stdio.h" |
13 | #include "redboot.h" |
14 | #include "fsl-soc.h" |
15 | #include "io.h" |
16 | |
17 | static bd_t bd; |
18 | BSS_STACK(4096); |
19 | |
20 | #define MHZ(x) ((x + 500000) / 1000000) |
21 | |
22 | static void platform_fixups(void) |
23 | { |
24 | void *node; |
25 | |
26 | dt_fixup_memory(start: bd.bi_memstart, size: bd.bi_memsize); |
27 | dt_fixup_mac_addresses(bd.bi_enetaddr); |
28 | dt_fixup_cpu_clocks(cpufreq: bd.bi_intfreq, tbfreq: bd.bi_busfreq / 16, busfreq: bd.bi_busfreq); |
29 | |
30 | node = finddevice(name: "/soc/cpm/brg" ); |
31 | if (node) { |
32 | printf(fmt: "BRG clock-frequency <- 0x%x (%dMHz)\r\n" , |
33 | bd.bi_busfreq, MHZ(bd.bi_busfreq)); |
34 | setprop(devp: node, name: "clock-frequency" , buf: &bd.bi_busfreq, buflen: 4); |
35 | } |
36 | |
37 | } |
38 | |
39 | void platform_init(unsigned long r3, unsigned long r4, unsigned long r5, |
40 | unsigned long r6, unsigned long r7) |
41 | { |
42 | memcpy(dest: &bd, src: (char *)r3, n: sizeof(bd)); |
43 | |
44 | if (bd.bi_tag != 0x42444944) |
45 | return; |
46 | |
47 | simple_alloc_init(base: _end, |
48 | heap_size: bd.bi_memstart + bd.bi_memsize - (unsigned long)_end, |
49 | granularity: 32, max_allocs: 64); |
50 | |
51 | fdt_init(blob: _dtb_start); |
52 | serial_console_init(); |
53 | platform_ops.fixups = platform_fixups; |
54 | |
55 | loader_info.cmdline = (char *)bd.bi_cmdline; |
56 | loader_info.cmdline_len = strlen((char *)bd.bi_cmdline); |
57 | } |
58 | |