feat(mt8188): initialize platform for MediaTek MT8188
- Add basic platform setup.
- Add MT8188 documentation at docs/plat/.
- Add generic CPU helper functions.
- Add basic register address.
- Add mtk_pm.c in lib/pm
TEST=build pass
BUG=b:236331724
Change-Id: I5f8617c42ffba2c9d3a16f3980cb75fda5624031
diff --git a/plat/mediatek/mt8188/aarch64/plat_helpers.S b/plat/mediatek/mt8188/aarch64/plat_helpers.S
new file mode 100644
index 0000000..7073ab1
--- /dev/null
+++ b/plat/mediatek/mt8188/aarch64/plat_helpers.S
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2022, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch.h>
+#include <asm_macros.S>
+#include <platform_def.h>
+
+ .globl plat_is_my_cpu_primary
+ .globl plat_my_core_pos
+ .globl plat_mediatek_calc_core_pos
+
+func plat_is_my_cpu_primary
+ mrs x0, mpidr_el1
+ and x0, x0, #(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK)
+ cmp x0, #PLAT_PRIMARY_CPU
+ cset x0, eq
+ ret
+endfunc plat_is_my_cpu_primary
+
+ /* -----------------------------------------------------
+ * unsigned int plat_my_core_pos(void)
+ * This function uses the plat_mediatek_calc_core_pos()
+ * definition to get the index of the calling CPU.
+ * -----------------------------------------------------
+ */
+func plat_my_core_pos
+ mrs x0, mpidr_el1
+ b plat_mediatek_calc_core_pos
+endfunc plat_my_core_pos
+
+ /* -----------------------------------------------------
+ * unsigned int plat_mediatek_calc_core_pos(u_register_t mpidr);
+ *
+ * With this function: CorePos = CoreID (AFF1)
+ * we do it with x0 = (x0 >> 8) & 0xff
+ * -----------------------------------------------------
+ */
+func plat_mediatek_calc_core_pos
+ mov x1, #MPIDR_AFFLVL_MASK
+ and x0, x1, x0, lsr #MPIDR_AFF1_SHIFT
+ ret
+endfunc plat_mediatek_calc_core_pos