marvell: Move BLE from external repo to the platform folder
The BLE is the pre-TF-A boot stage required by Marvell Armada
BootROM for bringing up DRAM and allow the boot image copy to it.
Since this is not a standard boot level and only uses the TF-A
as a build environment, it was introduced out of source tree.
However it turns out that such remote location introduces additional
complexity to the upstream TF-A build process.
In order to simplify the build environment the BLE source folder
is relocated from the external repository to A8K platform directory.
The build documentation is updated accordingly.
Signed-off-by: Konstantin Porotchkin <kostap@marvell.com>
diff --git a/plat/marvell/a8k/common/ble/ble_main.c b/plat/marvell/a8k/common/ble/ble_main.c
new file mode 100644
index 0000000..e52c738
--- /dev/null
+++ b/plat/marvell/a8k/common/ble/ble_main.c
@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 2018 Marvell International Ltd.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ * https://spdx.org/licenses
+ */
+
+#include <arch_helpers.h>
+#include <debug.h>
+#include <console.h>
+#include <marvell_plat_priv.h>
+#include <marvell_pm.h>
+#include <platform_def.h>
+#include <plat_marvell.h>
+#include <string.h>
+
+#define BR_FLAG_SILENT 0x1
+#define SKIP_IMAGE_CODE 0xDEADB002
+
+void mailbox_clean(void)
+{
+ uintptr_t *mailbox = (void *)PLAT_MARVELL_MAILBOX_BASE;
+
+ memset(mailbox, 0, PLAT_MARVELL_MAILBOX_SIZE);
+}
+
+int exec_ble_main(int bootrom_flags)
+{
+ int skip = 0;
+ uintptr_t *mailbox = (void *)PLAT_MARVELL_MAILBOX_BASE;
+
+ /*
+ * In some situations, like boot from UART, bootrom will
+ * request to avoid printing to console. in that case don't
+ * initialize the console and prints will be ignored
+ */
+ if ((bootrom_flags & BR_FLAG_SILENT) == 0)
+ console_init(PLAT_MARVELL_BOOT_UART_BASE,
+ PLAT_MARVELL_BOOT_UART_CLK_IN_HZ,
+ MARVELL_CONSOLE_BAUDRATE);
+
+ NOTICE("Starting binary extension\n");
+
+ /* initiliaze time (for delay functionality) */
+ plat_delay_timer_init();
+
+ ble_plat_setup(&skip);
+
+ /* if there's skip image request, bootrom will load from the image
+ * saved on the next address of the flash
+ */
+ if (skip)
+ return SKIP_IMAGE_CODE;
+
+ /*
+ * Check if the mailbox magic number is stored at index MBOX_IDX_MAGIC
+ * and the suspend to RAM magic number at index MBOX_IDX_SUSPEND_MAGIC.
+ * If the above is true, this is the recovery from suspend to RAM state.
+ * In such case the mailbox should remain intact, since it stores the
+ * warm boot jump address to be used by the TF-A in BL31.
+ * Othervise the mailbox should be cleaned from a garbage data.
+ */
+ if (mailbox[MBOX_IDX_MAGIC] != MVEBU_MAILBOX_MAGIC_NUM ||
+ mailbox[MBOX_IDX_SUSPEND_MAGIC] != MVEBU_MAILBOX_SUSPEND_STATE) {
+ NOTICE("Cold boot\n");
+ mailbox_clean();
+ } else {
+ void (*bootrom_exit)(void) =
+ (void (*)(void))mailbox[MBOX_IDX_ROM_EXIT_ADDR];
+
+ INFO("Recovery...\n");
+ /*
+ * If this is recovery from suspend, two things has to be done:
+ * 1. Define the DRAM region as executable memory for preparing
+ * jump to TF-A
+ * 2. Instead of returning control to the BootROM, invalidate
+ * and flush caches, and continue execution at address stored
+ * in the mailbox.
+ * This should be done until the BootROM have a native support
+ * for the system restore flow.
+ */
+ marvell_ble_prepare_exit();
+ bootrom_exit();
+ }
+
+ return 0;
+}
+
+/* NOTE: don't notify this function, all code must be added to exec_ble_main
+ * in order to keep the end of ble_main as a fixed address.
+ */
+int __attribute__ ((section(".entry"))) ble_main(int bootrom_flags)
+{
+ volatile int ret;
+
+ ret = exec_ble_main(bootrom_flags);
+ return ret;
+}