cpu-feature-overrides.h 1.2 KB

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  1. /*
  2. * This file is subject to the terms and conditions of the GNU General Public
  3. * License. See the file "COPYING" in the main directory of this archive
  4. * for more details.
  5. *
  6. * Copyright (C) 2005 Ilya A. Volynets-Evenbakh
  7. * Copyright (C) 2005 Ralf Baechle (ralf@linux-mips.org)
  8. */
  9. #ifndef __ASM_MACH_IP32_CPU_FEATURE_OVERRIDES_H
  10. #define __ASM_MACH_IP32_CPU_FEATURE_OVERRIDES_H
  11. #include <linux/config.h>
  12. /*
  13. * R5000 has an interesting "restriction": ll(d)/sc(d)
  14. * instructions to XKPHYS region simply do uncached bus
  15. * requests. This breaks all the atomic bitops functions.
  16. * so, for 64bit IP32 kernel we just don't use ll/sc.
  17. * This does not affect luserland.
  18. */
  19. #if defined(CONFIG_CPU_R5000) && defined(CONFIG_64BIT)
  20. #define cpu_has_llsc 0
  21. #else
  22. #define cpu_has_llsc 1
  23. #endif
  24. /* Settings which are common for all ip32 CPUs */
  25. #define cpu_has_tlb 1
  26. #define cpu_has_4kex 1
  27. #define cpu_has_fpu 1
  28. #define cpu_has_32fpr 1
  29. #define cpu_has_counter 1
  30. #define cpu_has_mips16 0
  31. #define cpu_has_vce 0
  32. #define cpu_has_cache_cdex_s 0
  33. #define cpu_has_mcheck 0
  34. #define cpu_has_ejtag 0
  35. #define cpu_has_vtag_icache 0
  36. #define cpu_has_ic_fills_f_dc 0
  37. #endif /* __ASM_MACH_IP32_CPU_FEATURE_OVERRIDES_H */