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ark1668ed-bsp
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u-boot
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arch
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mips
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mach-mscc
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lowlevel_init.S

lowlevel_init.S 813 B
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  1. /* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */
    2. 

  2. /*
    3. 

  3.  * Copyright (c) 2018 Microsemi Corporation
    4. 

  4.  */
    5. 

  5. 

  6. #include <asm/asm.h>
    7. 

  7. #include <asm/regdef.h>
    8. 

  8. 

  9.     .set noreorder
    10. 

  10.     .extern     vcoreiii_tlb_init
    11. 

  11.     .extern     vcoreiii_ddr_init
    12. 

  12. #ifdef CONFIG_SOC_LUTON
    13. 

  13.     .extern     pll_init
    14. 

  14. #endif
    15. 

  15. 

  16. LEAF(lowlevel_init)
    17. 

  17. 	/*
    18. 

  18. 	 * As we have no stack yet, we can assume the restricted
    19. 

  19. 	 * luxury of the sX-registers without saving them
    20. 

  20. 	 */
    21. 

  21. 

  22. 	/* Modify ra/s0 such we return to physical NOR location */
    23. 

  23. 	li	t0, 0x0fffffff
    24. 

  24. 	li	t1, CONFIG_TEXT_BASE
    25. 

  25. 	and	s0, ra, t0
    26. 

  26. 	add	s0, s0, t1
    27. 

  27. 

  28. 	jal	vcoreiii_tlb_init
    29. 

  29. 	 nop
    30. 

  30. 

  31. #ifdef CONFIG_SOC_LUTON
    32. 

  32. 	jal	pll_init
    33. 

  33. 	 nop
    34. 

  34. #endif
    35. 

  35. 

  36. 	/* Initialize DDR controller to enable stack/gd/heap */
    37. 

  37. 0:
    38. 

  38. 	jal	vcoreiii_ddr_init
    39. 

  39. 	 nop
    40. 

  40. 	bnez	v0, 0b		/* Retry on error */
    41. 

  41. 	 nop
    42. 

  42. 

  43. 	jr	s0
    44. 

  44. 	 nop
    45. 

  45. 	END(lowlevel_init)
    46.