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headsmp.S

headsmp.S 1.3 KB
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  1. /*
    2. 

  2.  * Copyright 2011 Freescale Semiconductor, Inc.
    3. 

  3.  * Copyright 2011 Linaro Ltd.
    4. 

  4.  *
    5. 

  5.  * The code contained herein is licensed under the GNU General Public
    6. 

  6.  * License. You may obtain a copy of the GNU General Public License
    7. 

  7.  * Version 2 or later at the following locations:
    8. 

  8.  *
    9. 

  9.  * http://www.opensource.org/licenses/gpl-license.html
    10. 

  10.  * http://www.gnu.org/copyleft/gpl.html
    11. 

  11.  */
    12. 

  12. 

  13. #include <linux/linkage.h>
    14. 

  14. #include <linux/init.h>
    15. 

  15. #include <asm/asm-offsets.h>
    16. 

  16. #include <asm/hardware/cache-l2x0.h>
    17. 

  17. 

  18. 	.section ".text.head", "ax"
    19. 

  19. 

  20. #ifdef CONFIG_SMP
    21. 

  21. ENTRY(v7_secondary_startup)
    22. 

  22. 	bl	v7_invalidate_l1
    23. 

  23. 	b	secondary_startup
    24. 

  24. ENDPROC(v7_secondary_startup)
    25. 

  25. #endif
    26. 

  26. 

  27. #ifdef CONFIG_PM
    28. 

  28. /*
    29. 

  29.  * The following code must assume it is running from physical address
    30. 

  30.  * where absolute virtual addresses to the data section have to be
    31. 

  31.  * turned into relative ones.
    32. 

  32.  */
    33. 

  33. 

  34. #ifdef CONFIG_CACHE_L2X0
    35. 

  35. 	.macro	pl310_resume
    36. 

  36. 	adr	r0, l2x0_saved_regs_offset
    37. 

  37. 	ldr	r2, [r0]
    38. 

  38. 	add	r2, r2, r0
    39. 

  39. 	ldr	r0, [r2, #L2X0_R_PHY_BASE]	@ get physical base of l2x0
    40. 

  40. 	ldr	r1, [r2, #L2X0_R_AUX_CTRL]	@ get aux_ctrl value
    41. 

  41. 	str	r1, [r0, #L2X0_AUX_CTRL]	@ restore aux_ctrl
    42. 

  42. 	mov	r1, #0x1
    43. 

  43. 	str	r1, [r0, #L2X0_CTRL]		@ re-enable L2
    44. 

  44. 	.endm
    45. 

  45. 

  46. l2x0_saved_regs_offset:
    47. 

  47. 	.word	l2x0_saved_regs - .
    48. 

  48. 

  49. #else
    50. 

  50. 	.macro	pl310_resume
    51. 

  51. 	.endm
    52. 

  52. #endif
    53. 

  53. 

  54. ENTRY(v7_cpu_resume)
    55. 

  55. 	bl	v7_invalidate_l1
    56. 

  56. 	pl310_resume
    57. 

  57. 	b	cpu_resume
    58. 

  58. ENDPROC(v7_cpu_resume)
    59. 

  59. #endif
    60.