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>
diff --git a/arch/arc/kernel/vmlinux.lds.S b/arch/arc/kernel/vmlinux.lds.S
index 303ea01..8d3b0d4 100644
--- a/arch/arc/kernel/vmlinux.lds.S
+++ b/arch/arc/kernel/vmlinux.lds.S
@@ -23,6 +23,12 @@
SECTIONS
{
+ /*
+ * ICCM starts at 0x8000_0000. So if kernel is relocated to some other
+ * address, make sure peripheral at 0x8z doesn't clash with ICCM
+ * Essentially vector is also in ICCM.
+ */
+
. = CONFIG_LINUX_LINK_BASE;
_int_vec_base_lds = .;
@@ -31,6 +37,13 @@
. = ALIGN(PAGE_SIZE);
}
+#ifdef CONFIG_ARC_HAS_ICCM
+ .text.arcfp : {
+ *(.text.arcfp)
+ . = ALIGN(CONFIG_ARC_ICCM_SZ * 1024);
+ }
+#endif
+
/*
* The reason for having a seperate subsection .init.ramfs is to
* prevent objump from including it in kernel dumps
@@ -134,4 +147,12 @@
.debug_loc 0 : { *(.debug_loc) }
.debug_macinfo 0 : { *(.debug_macinfo) }
+#ifdef CONFIG_ARC_HAS_DCCM
+ . = CONFIG_ARC_DCCM_BASE;
+ __arc_dccm_base = .;
+ .data.arcfp : {
+ *(.data.arcfp)
+ }
+ . = ALIGN(CONFIG_ARC_DCCM_SZ * 1024);
+#endif
}