[PATCH 1/3] Add a new necessary definition needed for raspberrypi MMU support

[Gedare Bloom]

OK to commit? The only issue I see is whether we strictly need the FSR
defines, but they should be OK?

On Mon, Sep 16, 2013 at 12:17 PM, Hesham AL-Matary
<heshamelmatary at gmail.com> wrote:
> The new ARM_CP15_CTRL_XP is necessary to share ARMv6 and ARMv7
> page-table formats and definitions.
> It enables the extended page tables (introduced in ARMv6)
> to be configured for the hardware page translation mechanism. This way
> we can share ARMv6 and ARMv7 page tables entry formats.
>
> Other Fault Status Register Definitions can be useful for debugging or
> excpetion handlers.
>
> ---
>  c/src/lib/libcpu/arm/shared/include/arm-cp15.h | 21 +++++++++++++++++++++
>  1 file changed, 21 insertions(+)
>
> diff --git a/c/src/lib/libcpu/arm/shared/include/arm-cp15.h b/c/src/lib/libcpu/arm/shared/include/arm-cp15.h
> index 0117a5e..17cab18 100644
> --- a/c/src/lib/libcpu/arm/shared/include/arm-cp15.h
> +++ b/c/src/lib/libcpu/arm/shared/include/arm-cp15.h
> @@ -7,6 +7,7 @@
>   */
>
>  /*
> + * Copyright (c) 2013 Hesham AL-Matary
>   * Copyright (c) 2009-2013 embedded brains GmbH.  All rights reserved.
>   *
>   *  embedded brains GmbH
> @@ -139,6 +140,7 @@ extern "C" {
>  #define ARM_CP15_CTRL_NMFI (1U << 27)
>  #define ARM_CP15_CTRL_EE (1U << 25)
>  #define ARM_CP15_CTRL_VE (1U << 24)
> +#define ARM_CP15_CTRL_XP (1U << 23)
>  #define ARM_CP15_CTRL_U (1U << 22)
>  #define ARM_CP15_CTRL_FI (1U << 21)
>  #define ARM_CP15_CTRL_UWXN (1U << 20)
> @@ -173,6 +175,25 @@ extern "C" {
>
>  /** @} */
>
> +/**
> + * @name Fault Status Register Defines
> + *
> + * @{
> + */
> +
> +#define ARM_CP15_FAULT_STATUS_MASK 0x040F
> +
> +#define ARM_CP15_FSR_ALIGNMENT_FAULT   0x00000001
> +#define ARM_CP15_FSR_BACKGROUND_FAULT  0x0000
> +#define ARM_CP15_FSR_ACCESS_PERMISSION_FAULT 0x000D
> +#define ARM_CP15_FSR_PRECISE_EXTERNAL_ABORT_FAULT 0x0008
> +#define ARM_CP15_FSR_IMPRECISE_EXTERNAL_ABORT_FAULT 0x0406
> +#define ARM_CP15_FSR_PRECISE_PARITY_ERROR_EXCEPTION 0x0006
> +#define ARM_CP15_FSR_IMPRECISE_PARITY_ERROR_EXCEPTION 0x0408
> +#define ARM_CP15_FSR_DEBUG_EVENT 0x0002
> +
> +/** @} */
> +
>  static inline uint32_t arm_cp15_get_id_code(void)
>  {
>    ARM_SWITCH_REGISTERS;
> --
> 1.8.3.1
>
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