layerscape: Initial TF-A support for LS1043ardb
This patch introduce TF-A support for NXP's ls1043a platform.
more details information of ls1043a chip and ls1043ardb board
can be found at docs/plat/ls1043a.rst.
Boot sequence on ls1043a is: bootrom loads bl1 firstly, then bl1
loads bl2, bl2 will load bl31, bl32 and bl33, bl31 will boot
bl32(tee os) and bl33(u-boot or uefi), bl33 boot Linux kernel.
Now TF-A on ls1043ardb platform has the following features in this patch:
* Support boot from Nor flash.
* TF-A can boot bl33 which runs in el2 of non-secure world.
* TF-A boot OPTee OS.
* Support PSCI
Signed-off-by: Jiafei Pan <Jiafei.Pan@nxp.com>
Signed-off-by: Chenyin.Ha <Chenyin.Ha@nxp.com>
Signed-off-by: Chenhui Zhao <chenhui.zhao@nxp.com>
Signed-off-by: jiaheng.fan <jiaheng.fan@nxp.com>
Signed-off-by: Wen He <wen.he_1@nxp.com>
diff --git a/plat/layerscape/common/ls_timer.c b/plat/layerscape/common/ls_timer.c
new file mode 100644
index 0000000..25b5e63
--- /dev/null
+++ b/plat/layerscape/common/ls_timer.c
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <mmio.h>
+#include <delay_timer.h>
+#include <arch_helpers.h>
+
+#define TIMER_BASE_ADDR 0x02B00000
+
+uint64_t ls_get_timer(uint64_t start)
+{
+ return read_cntpct_el0() * 1000 / read_cntfrq_el0() - start;
+}
+
+static uint32_t ls_timeus_get_value(void)
+{
+ /*
+ * Generic delay timer implementation expects the timer to be a down
+ * counter. We apply bitwise NOT operator to the tick values returned
+ * by read_cntpct_el0() to simulate the down counter. The value is
+ * clipped from 64 to 32 bits.
+ */
+ return (uint32_t)(~read_cntpct_el0());
+}
+
+static const timer_ops_t ls_timer_ops = {
+ .get_timer_value = ls_timeus_get_value,
+ .clk_mult = 1,
+ .clk_div = 25,
+};
+
+
+/*
+ * Initialise the nxp layerscape on-chip free rolling us counter as the delay
+ * timer.
+ */
+void ls_delay_timer_init(void)
+{
+ uintptr_t cntcr = TIMER_BASE_ADDR;
+
+ mmio_write_32(cntcr, 0x1);
+
+ timer_init(&ls_timer_ops);
+}