| /* |
| * Copyright (c) 2025 ITE Corporation. All Rights Reserved. |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #include <zephyr/toolchain.h> |
| |
| /* exports */ |
| GTEXT(__start) |
| |
| /* imports */ |
| GTEXT(__initialize) |
| GTEXT(_isr_wrapper) |
| |
| SECTION_FUNC(vectors, __start) |
| #ifdef CONFIG_RISCV_GP |
| .option push |
| .option norelax |
| /* Configure the GP register */ |
| la gp, __global_pointer$ |
| .option pop |
| #endif |
| |
| .option norvc; |
| /* |
| * Set mtvec (Machine Trap-Vector Base-Address Register) |
| * to _isr_wrapper. |
| */ |
| la t0, _isr_wrapper |
| csrw mtvec, t0 |
| csrwi mie, 0 |
| /* Jump to __initialize */ |
| tail __initialize |
| |
| /* |
| * eflash signature used to enable specific function after power-on reset. |
| * (HW mechanism) |
| * The content of 16-bytes must be the following and at offset 0x40 of binary. |
| * ---------------------------------------------------------------------------- |
| * 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th 13th 14th 15th 16th |
| * ---------------------------------------------------------------------------- |
| * A5h A5h A5h A5h A5h A5h [host] [flag] 85h 12h 5Ah 5Ah AAh AAh 55h 55h |
| * ---------------------------------------------------------------------------- |
| * 7th [host]: A4h = enable eSPI, A5h = enable LPC |
| */ |
| .org 0x40 |
| .balign 16 |
| .global eflash_sig |
| eflash_sig: |
| .byte 0xA5, 0xA5, 0xA5, 0xA5, 0xA5, 0xA5 |
| #ifdef CONFIG_ESPI |
| .byte 0xA4 /* eSPI mode */ |
| #else |
| .byte 0xA5 /* LPC mode */ |
| #endif |
| /* Flag of signature. Enable internal clock generator */ |
| .byte 0xB4 |
| .byte 0x85, 0x12, 0x5A, 0x5A, 0xAA, 0xAA, 0x55, 0x55 |
