GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

2026-09-06 03:52:57 +08:00
commit b1928b41c0
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+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2019 MediaTek Inc.
+ * Author: Mingming Lee <mingming.lee@mediatek.com>
+ */
+
+/*
+ * Switch from AArch64 EL2 to AArch32 EL2
+ * @param inputs:
+ * x0: argument, zero
+ * x1: machine nr
+ * x2: fdt address
+ * x3: input argument
+ * x4: kernel entry point
+ * @param outputs for secure firmware:
+ * x0: function id
+ * x1: kernel entry point
+ * x2: machine nr
+ * x3: fdt address
+*/
+.global armv8_el2_to_aarch32
+armv8_el2_to_aarch32:
+	mov     x3, x2
+	mov     x2, x1
+	mov     x1, x4
+	mov	x4, #0
+	/* Define in src\bsp\trustzone\atf\v1.2\ */
+	/* mt8xxx\plat\mediatek\common\sip_svc.h */
+	/* MTK_SIP_KERNEL_BOOT_AARCH64 for U-BOOT-64 to KERNEL*/
+	ldr x0, =0xC2000200
+	SMC #0
+	ret