diff options
Diffstat (limited to 'arch/arc/include/asm/arcregs.h')
| -rw-r--r-- | arch/arc/include/asm/arcregs.h | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/arch/arc/include/asm/arcregs.h b/arch/arc/include/asm/arcregs.h index 9920d2e719..fff6591c68 100644 --- a/arch/arc/include/asm/arcregs.h +++ b/arch/arc/include/asm/arcregs.h @@ -16,6 +16,20 @@ * access: "lr"/"sr". */ +/* + * Typically 8 least significant bits of Build Configuration Register (BCR) + * describe version of the HW block in question. Moreover if decoded version + * is 0 this means given HW block is absent - this is especially useful because + * we may safely read BRC regardless HW block existence while an attempt to + * access any other AUX regs associated with this HW block lead to imediate + * "instruction error" exception. + * + * I.e. before using any cofigurable HW block it's required to make sure it + * exists at all, and for that we introduce a special macro below. + */ +#define ARC_BCR_VERSION_MASK GENMASK(7, 0) +#define ARC_FEATURE_EXISTS(bcr) !!(__builtin_arc_lr(bcr) & ARC_BCR_VERSION_MASK) + #define ARC_AUX_IDENTITY 0x04 #define ARC_AUX_STATUS32 0x0a @@ -73,7 +87,7 @@ #define ARC_BCR_CLUSTER 0xcf /* MMU Management regs */ -#define ARC_AUX_MMU_BCR 0x06f +#define ARC_AUX_MMU_BCR 0x6f /* IO coherency related auxiliary registers */ #define ARC_AUX_IO_COH_ENABLE 0x500 @@ -81,6 +95,15 @@ #define ARC_AUX_IO_COH_AP0_BASE 0x508 #define ARC_AUX_IO_COH_AP0_SIZE 0x509 +/* XY-memory related */ +#define ARC_AUX_XY_BUILD 0x79 + +/* DSP-extensions related auxiliary registers */ +#define ARC_AUX_DSP_BUILD 0x7A + +/* ARC Subsystems related auxiliary registers */ +#define ARC_AUX_SUBSYS_BUILD 0xF0 + #ifndef __ASSEMBLY__ /* Accessors for auxiliary registers */ #define read_aux_reg(reg) __builtin_arc_lr(reg) |