LXR linux/arch/powerpc/boot/redboot-83xx.c

   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
  17static bd_t bd;
  18BSS_STACK(4096);
  19
  20#define MHZ(x)  ((x + 500000) / 1000000)
  21
  22static void platform_fixups(void)
  23{
  24        void *node;
  25
  26        dt_fixup_memory(bd.bi_memstart, bd.bi_memsize);
  27        dt_fixup_mac_addresses(bd.bi_enetaddr);
  28        dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 16, bd.bi_busfreq);
  29
  30        node = finddevice("/soc/cpm/brg");
  31        if (node) {
  32                printf("BRG clock-frequency <- 0x%x (%dMHz)\r\n",
  33                       bd.bi_busfreq, MHZ(bd.bi_busfreq));
  34                setprop(node, "clock-frequency",  &bd.bi_busfreq, 4);
  35        }
  36
  37}
  38
  39void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
  40                   unsigned long r6, unsigned long r7)
  41{
  42        memcpy(&bd, (char *)r3, sizeof(bd));
  43
  44        if (bd.bi_tag != 0x42444944)
  45                return;
  46
  47        simple_alloc_init(_end,
  48                          bd.bi_memstart + bd.bi_memsize - (unsigned long)_end,
  49                          32, 64);
  50
  51        fdt_init(_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