redboot-8xx.c 1.3 KB

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  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. #include "ops.h"
  10. #include "stdio.h"
  11. #include "redboot.h"
  12. #include "fsl-soc.h"
  13. #include "io.h"
  14. static bd_t bd;
  15. BSS_STACK(4096);
  16. #define MHZ(x) ((x + 500000) / 1000000)
  17. static void platform_fixups(void)
  18. {
  19. void *node;
  20. dt_fixup_memory(bd.bi_memstart, bd.bi_memsize);
  21. dt_fixup_mac_addresses(bd.bi_enetaddr);
  22. dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 16, bd.bi_busfreq);
  23. node = finddevice("/soc/cpm/brg");
  24. if (node) {
  25. printf("BRG clock-frequency <- 0x%x (%dMHz)\r\n",
  26. bd.bi_busfreq, MHZ(bd.bi_busfreq));
  27. setprop(node, "clock-frequency", &bd.bi_busfreq, 4);
  28. }
  29. }
  30. void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
  31. unsigned long r6, unsigned long r7)
  32. {
  33. memcpy(&bd, (char *)r3, sizeof(bd));
  34. if (bd.bi_tag != 0x42444944)
  35. return;
  36. simple_alloc_init(_end,
  37. bd.bi_memstart + bd.bi_memsize - (unsigned long)_end,
  38. 32, 64);
  39. fdt_init(_dtb_start);
  40. serial_console_init();
  41. platform_ops.fixups = platform_fixups;
  42. loader_info.cmdline = (char *)bd.bi_cmdline;
  43. loader_info.cmdline_len = strlen((char *)bd.bi_cmdline);
  44. }