rockchip: px30: support px30

px30 is a Quad-core soc and Cortex-a53 inside.
This patch supports the following functions:
1. basic platform setup
2. power up/off cpus
3. suspend/resume cpus
4. suspend/resume system
5. reset system
6. power off system

Change-Id: I73d55aa978096c078242be921abe0ddca9e8f67e
Signed-off-by: XiaoDong Huang <derrick.huang@rock-chips.com>
diff --git a/plat/rockchip/px30/include/plat.ld.S b/plat/rockchip/px30/include/plat.ld.S
new file mode 100644
index 0000000..44cca0d
--- /dev/null
+++ b/plat/rockchip/px30/include/plat.ld.S
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2019, 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
+	 */
+	.pmusram : {
+		ASSERT(. == ALIGN(64 * 1024),
+			".pmusram.entry request 64K aligned.");
+		KEEP(*(.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__ */