ARC: Support for single cycle Close Coupled Mem (CCM)

* Includes mapping of CCMs in address space
* Annotations to move arbitrary code/data into CCM
* Moving some of the critical code/data into CCM
* Runtime detection/reporting

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/arch/arc/include/asm/linkage.h b/arch/arc/include/asm/linkage.h
index a45d1bb50e41..0283e9e44e0d 100644
--- a/arch/arc/include/asm/linkage.h
+++ b/arch/arc/include/asm/linkage.h
@@ -25,6 +25,39 @@
         .size \ name, ASM_PREV_SYM_ADDR(\name)
 .endm
 
+/* annotation for data we want in DCCM - if enabled in .config */
+.macro ARCFP_DATA nm
+#ifdef CONFIG_ARC_HAS_DCCM
+        .section .data.arcfp
+#else
+        .section .data
+#endif
+        .global \nm
+.endm
+
+/* annotation for data we want in DCCM - if enabled in .config */
+.macro ARCFP_CODE
+#ifdef CONFIG_ARC_HAS_ICCM
+        .section .text.arcfp, "ax",@progbits
+#else
+        .section .text, "ax",@progbits
+#endif
+.endm
+
+#else   /* !__ASSEMBLY__ */
+
+#ifdef CONFIG_ARC_HAS_ICCM
+#define __arcfp_code __attribute__((__section__(".text.arcfp")))
+#else
+#define __arcfp_code __attribute__((__section__(".text")))
+#endif
+
+#ifdef CONFIG_ARC_HAS_DCCM
+#define __arcfp_data __attribute__((__section__(".data.arcfp")))
+#else
+#define __arcfp_data __attribute__((__section__(".data")))
+#endif
+
 #endif /* __ASSEMBLY__ */
 
 #endif