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fw: Import tkey-libs fw-2

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This is an import of the fw-2 tag of tkey-libs.

We import the entire tkey-libs repo minus dot files into the
tillitis-key1 repo to make it very simple not to make mistakes
regarding which firmware tag depends on which tkey-libs tag,
especially considering locking down with NVCM.

Please see README for information about developing with another
tkey-libs or how to import future tkey-libs.

Since tkey-libs is now a part of the repo we also add tkey-libs to the
clean_fw target.
This commit is contained in:
Michael Cardell Widerkrantz 2025-03-11 13:16:56 +01:00
parent 3dbc31f54c
commit 16a9e8c367
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53
hw/application_fpga/tkey-libs/libcrt0/crt0.S Normal file
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// SPDX-FileCopyrightText: 2022 Tillitis AB <tillitis.se>
// SPDX-License-Identifier: BSD-2-Clause
.section ".text.init"
.global _start
_start:
li x1, 0
li x2, 0
li x3, 0
li x4, 0
li x5, 0
li x6, 0
li x7, 0
li x8, 0
li x9, 0
li x10,0
li x11,0
li x12,0
li x13,0
li x14,0
li x15,0
li x16,0
li x17,0
li x18,0
li x19,0
li x20,0
li x21,0
li x22,0
li x23,0
li x24,0
li x25,0
li x26,0
li x27,0
li x28,0
li x29,0
li x30,0
li x31,0
/* init stack below 0x40020000 (TK1_RAM_BASE+TK1_RAM_SIZE) */
li sp, 0x4001fff0
/* zero-init bss section */
la a0, _sbss
la a1, _ebss
bge a0, a1, end_init_bss
loop_init_bss:
sw zero, 0(a0)
addi a0, a0, 4
blt a0, a1, loop_init_bss
end_init_bss:
call main