rockchip: add pmusram section

the function pmu_cpuon_entrypoint() need to run in the pmusram,
we just copy bin file to pmusram before, now we add pmusram section
and link pmu_cpuon_entrypoint() to pmusram directly

Change-Id: Iae31e4c01c480c8e6f565a8f588332b478efdb16
Signed-off-by: Lin Huang <hl@rock-chips.com>
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
diff --git a/plat/rockchip/rk3368/include/plat.ld.S b/plat/rockchip/rk3368/include/plat.ld.S
new file mode 100644
index 0000000..b3559b2
--- /dev/null
+++ b/plat/rockchip/rk3368/include/plat.ld.S
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+#ifndef __ROCKCHIP_PLAT_LD_S__
+#define __ROCKCHIP_PLAT_LD_S__
+
+MEMORY {
+    PMUSRAM (rwx): ORIGIN = PMUSRAM_BASE, LENGTH = PMUSRAM_RSIZE
+}
+
+SECTIONS
+{
+	. = PMUSRAM_BASE;
+
+	/*
+	 * pmu_cpuson_entrypoint request address
+	 * align 64K when resume, so put it in the
+	 * start of pmusram
+	 */
+	.text_pmusram : {
+		ASSERT(. == ALIGN(64 * 1024),
+			".pmusram.entry request 64K aligned.");
+		*(.pmusram.entry)
+		__bl31_pmusram_text_start = .;
+		*(.pmusram.text)
+		*(.pmusram.rodata)
+		__bl31_pmusram_text_end = .;
+		__bl31_pmusram_data_start = .;
+		*(.pmusram.data)
+		__bl31_pmusram_data_end = .;
+
+	} >PMUSRAM
+}
+
+#endif /* __ROCKCHIP_PLAT_LD_S__ */