Blackfin arch: Extend sram malloc to handle L2 SRAM.
Extend system call to alloc L2 SRAM in application.
Automatically move following sections to L2 SRAM:
1. kernel built-in l2 attribute section
2. kernel module l2 attribute section
3. elf-fdpic application l2 attribute section
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
diff --git a/arch/blackfin/kernel/vmlinux.lds.S b/arch/blackfin/kernel/vmlinux.lds.S
index 3ecc64c..0896e38 100644
--- a/arch/blackfin/kernel/vmlinux.lds.S
+++ b/arch/blackfin/kernel/vmlinux.lds.S
@@ -101,6 +101,11 @@
#if !L1_DATA_B_LENGTH
*(.l1.data.B)
#endif
+#ifndef L2_LENGTH
+ . = ALIGN(32);
+ *(.data_l2.cacheline_aligned)
+ *(.l2.data)
+#endif
DATA_DATA
*(.data.*)
@@ -182,14 +187,13 @@
*(.l1.data)
__edata_l1 = .;
- . = ALIGN(4);
- __sbss_l1 = .;
- *(.l1.bss)
-
. = ALIGN(32);
*(.data_l1.cacheline_aligned)
. = ALIGN(4);
+ __sbss_l1 = .;
+ *(.l1.bss)
+ . = ALIGN(4);
__ebss_l1 = .;
}
@@ -203,11 +207,37 @@
. = ALIGN(4);
__sbss_b_l1 = .;
*(.l1.bss.B)
-
. = ALIGN(4);
__ebss_b_l1 = .;
}
+#ifdef L2_LENGTH
+ __l2_lma_start = .;
+
+ .text_data_l2 L2_START : AT(LOADADDR(.data_b_l1) + SIZEOF(.data_b_l1))
+ {
+ . = ALIGN(4);
+ __stext_l2 = .;
+ *(.l1.text)
+ . = ALIGN(4);
+ __etext_l2 = .;
+
+ . = ALIGN(4);
+ __sdata_l2 = .;
+ *(.l1.data)
+ __edata_l2 = .;
+
+ . = ALIGN(32);
+ *(.data_l2.cacheline_aligned)
+
+ . = ALIGN(4);
+ __sbss_l2 = .;
+ *(.l1.bss)
+ . = ALIGN(4);
+ __ebss_l2 = .;
+ }
+#endif
+
/* Force trailing alignment of our init section so that when we
* free our init memory, we don't leave behind a partial page.
*/