feat(nuvoton): added support for npcm845x chip
Initial version
Signed-off-by: Margarita Glushkin <rutigl@gmail.com>
Change-Id: If433d325a90b519ae5f02411865bffd368ff2824
diff --git a/plat/nuvoton/common/nuvoton_helpers.S b/plat/nuvoton/common/nuvoton_helpers.S
new file mode 100644
index 0000000..09035a1
--- /dev/null
+++ b/plat/nuvoton/common/nuvoton_helpers.S
@@ -0,0 +1,214 @@
+/*
+ * Copyright (c) 2015-2023, ARM Limited and Contributors. All rights reserved.
+ *
+ * Copyright (C) 2022-2023 Nuvoton Ltd.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef NUVOTON_HELPERS_S
+#define NUVOTON_HELPERS_S
+
+#include <asm_macros.S>
+#include <cortex_a35.h>
+#include <platform_def.h>
+
+ .globl plat_is_my_cpu_primary
+ .globl plat_my_core_pos
+ .globl plat_calc_core_pos
+ .globl plat_reset_handler
+ .globl plat_get_my_entrypoint
+ .globl plat_secondary_cold_boot_setup
+ .globl plat_crash_console_init
+ .globl plat_crash_console_putc
+ .globl plat_crash_console_flush
+ .globl platform_mem_init
+ .globl npcm845x_mailbox_init
+
+ /* --------------------------------------------------------------------
+ * Helper macro that reads the part number of the current CPU and jumps
+ * to the given label if it matches the CPU MIDR provided.
+ *
+ * Clobbers x0.
+ * --------------------------------------------------------------------
+ */
+ .macro jump_if_cpu_midr _cpu_midr, _label
+
+ mrs x0, midr_el1
+ ubfx x0, x0, MIDR_PN_SHIFT, #12
+ cmp w0, #((\_cpu_midr >> MIDR_PN_SHIFT) & MIDR_PN_MASK)
+ b.eq \_label
+
+ .endm
+
+ /* ----------------------------------------------
+ * The mailbox_base is used to distinguish warm/cold
+ * reset. The mailbox_base is in the data section, not
+ * in .bss, this allows function to start using this
+ * variable before the runtime memory is initialized.
+ * ----------------------------------------------
+ */
+ .section .data.mailbox_base
+ .align 3
+ mailbox_base: .quad 0x0
+
+ /* ---------------------------------------------
+ * void plat_reset_handler(void);
+ *
+ * To add: Determine the SoC type and call the appropriate
+ * reset handler.
+ *----------------------------------------------- */
+
+func plat_reset_handler
+ ret
+endfunc plat_reset_handler
+
+ /* ----------------------------------------------
+ * unsigned int plat_is_my_cpu_primary(void);
+ * This function checks if this is the primary CPU
+ * ----------------------------------------------
+ */
+func plat_is_my_cpu_primary
+ mrs x0, mpidr_el1
+ and x0, x0, #(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_calc_core_pos()
+ * to get the index of the calling CPU.
+ * ----------------------------------------------
+ */
+func plat_my_core_pos
+ mrs x0, mpidr_el1
+ and x1, x0, #MPIDR_CPU_MASK
+ and x0, x0, #MPIDR_CLUSTER_MASK
+ add x0, x1, x0, LSR #6
+ ret
+endfunc plat_my_core_pos
+
+ /*
+ * unsigned int plat_calc_core_pos(uint64_t mpidr)
+ * helper function to calculate the core position.
+ * With this function.
+ */
+func plat_calc_core_pos
+ and x1, x0, #MPIDR_CPU_MASK
+ and x0, x0, #MPIDR_CLUSTER_MASK
+ add x0, x1, x0, LSR #6
+ ret
+endfunc plat_calc_core_pos
+
+ /* ---------------------------------------------
+ * function to get the entrypoint.
+ * ---------------------------------------------
+ */
+ /* ---------------------------------------------------------------------
+ * uintptr_t plat_get_my_entrypoint (void);
+ *
+ * Main job of this routine is to distinguish between a cold and a warm
+ * boot.
+ *
+ * This functions returns:
+ * - 0 for a cold boot.
+ * - Any other value for a warm boot.
+ * ---------------------------------------------------------------------
+ */
+func plat_get_my_entrypoint
+ mov x1, x30
+ bl plat_is_my_cpu_primary
+ /*
+ * Secondaries always cold boot.
+ */
+ cbz w0, 1f
+ /*
+ * Primaries warm boot if they are requested
+ * to power off.
+ */
+ mov_imm x0, PLAT_NPCM_TM_HOLD_BASE
+ ldr x0, [x0]
+ cmp x0, PLAT_NPCM_TM_HOLD_STATE_BSP_OFF
+ adr x0, plat_wait_for_warm_boot
+ csel x0, x0, xzr, eq
+ ret x1
+1: mov x0, #0
+ ret x1
+endfunc plat_get_my_entrypoint
+
+func npcm845x_mailbox_init
+ adrp x1, mailbox_base
+ str x0, [x1, :lo12:mailbox_base]
+ ret
+endfunc npcm845x_mailbox_init
+
+func plat_wait_for_warm_boot
+ /*
+ * Calculate address of our hold entry.
+ * As the function will never return, there is no need to save LR.
+ */
+ bl plat_my_core_pos
+ lsl x0, x0, #3
+ mov x8, x0
+ mov_imm x2, PLAT_NPCM_TM_HOLD_BASE
+ add x0, x0, x2
+ mov_imm x2, PLAT_NPCM_TRUSTED_NOTIFICATION_BASE
+ add x8, x8, x2
+ /*
+ * This code runs way before requesting the warmboot of this core,
+ * so it is possible to clear the mailbox before getting a request
+ * to boot.
+ */
+ mov x1, PLAT_NPCM_TM_HOLD_STATE_WAIT
+ str x1,[x0]
+
+ /* Notify that core is in pending state - do not use x0!, uses x7 and x8! */
+ mov x7, PLAT_NPCM_TM_NOTIFICATION_START
+ str x7,[x8]
+ /*
+ * This code runs way before requesting the warmboot of this core,
+ * so it is possible to clear the mailbox before getting a request
+ * to boot.
+ */
+ mov x1, PLAT_NPCM_TM_HOLD_STATE_WAIT
+ str x1,[x0]
+ /* Wait until we have a go */
+poll_mailbox:
+ wfe
+ ldr x1, [x0]
+ cmp x1, PLAT_NPCM_TM_HOLD_STATE_GO
+ bne poll_mailbox
+
+ mov x7, PLAT_NPCM_TM_NOTIFICATION_BR
+ str x7,[x8]
+ /* Jump to the provided entrypoint */
+ mov_imm x0, PLAT_NPCM_TM_ENTRYPOINT
+ ldr x1, [x0]
+ br x1
+endfunc plat_wait_for_warm_boot
+
+func plat_secondary_cold_boot_setup
+ b plat_wait_for_warm_boot
+endfunc plat_secondary_cold_boot_setup
+
+func plat_crash_console_init
+ mov x0, #1
+ ret
+endfunc plat_crash_console_init
+
+func plat_crash_console_putc
+ ret
+endfunc plat_crash_console_putc
+
+func plat_crash_console_flush
+ mov x0, #0
+ ret
+endfunc plat_crash_console_flush
+
+func platform_mem_init
+ ret
+endfunc platform_mem_init
+
+#endif /* NUVOTON_HELPERS_S */