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- /*
- * SPDX-License-Identifier: BSD-2-Clause
- *
- * Copyright (c) 2019 Western Digital Corporation or its affiliates.
- *
- * Authors:
- * Anup Patel <anup.patel@wdc.com>
- */
- #include "fw_base.S"
- .section .entry, "ax", %progbits
- .align 3
- .global fw_boot_hart
- /*
- * This function is called very early even before
- * fw_save_info() is called.
- * We can only use a0, a1, and a2 registers here.
- * The boot HART id should be returned in 'a0'.
- */
- fw_boot_hart:
- li a0, -1
- ret
- .section .entry, "ax", %progbits
- .align 3
- .global fw_save_info
- /*
- * We can only use a0, a1, a2, a3, and a4 registers here.
- * The a0, a1, and a2 registers will be same as passed by
- * previous booting stage.
- * Nothing to be returned here.
- */
- fw_save_info:
- ret
- .section .entry, "ax", %progbits
- .align 3
- .global fw_next_arg1
- /*
- * We can only use a0, a1, and a2 registers here.
- * The a0, a1, and a2 registers will be same as passed by
- * previous booting stage.
- * The next arg1 should be returned in 'a0'.
- */
- fw_next_arg1:
- #ifdef FW_JUMP_FDT_ADDR
- li a0, FW_JUMP_FDT_ADDR
- #else
- add a0, a1, zero
- #endif
- ret
- .section .entry, "ax", %progbits
- .align 3
- .global fw_next_addr
- /*
- * We can only use a0, a1, and a2 registers here.
- * The next address should be returned in 'a0'.
- */
- fw_next_addr:
- lla a0, _jump_addr
- REG_L a0, (a0)
- ret
- .section .entry, "ax", %progbits
- .align 3
- .global fw_next_mode
- /*
- * We can only use a0, a1, and a2 registers here.
- * The next address should be returned in 'a0'
- */
- fw_next_mode:
- li a0, PRV_S
- ret
- .section .entry, "ax", %progbits
- .align 3
- .global fw_options
- /*
- * We can only use a0, a1, and a2 registers here.
- * The 'a4' register will have default options.
- * The next address should be returned in 'a0'.
- */
- fw_options:
- add a0, zero, zero
- ret
- #ifndef FW_JUMP_ADDR
- #error "Must define FW_JUMP_ADDR"
- #endif
- .section .entry, "ax", %progbits
- .align 3
- _jump_addr:
- RISCV_PTR FW_JUMP_ADDR
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