| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame] | 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 | |
| 20 | static bd_t bd; |
| 21 | BSS_STACK(4096); |
| 22 | |
| 23 | #define MHZ(x) ((x + 500000) / 1000000) |
| 24 | |
| 25 | static 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 | |
| 42 | void 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 | } |