diff options
Diffstat (limited to 'firmware/target/mips/ingenic_x1000/crt0.S')
| -rw-r--r-- | firmware/target/mips/ingenic_x1000/crt0.S | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/firmware/target/mips/ingenic_x1000/crt0.S b/firmware/target/mips/ingenic_x1000/crt0.S index 5610587094..fbac12861d 100644 --- a/firmware/target/mips/ingenic_x1000/crt0.S +++ b/firmware/target/mips/ingenic_x1000/crt0.S @@ -7,7 +7,7 @@ * \/ \/ \/ \/ \/ * $Id$ * - * Copyright (C) 2021 Aidan MacDonald + * Copyright (C) 2021-2022 Aidan MacDonald * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License @@ -82,6 +82,24 @@ _realstart: bal _clear move a1, k0 + /* Write back D-cache and invalidate I-cache */ + li v0, 0x80000000 + ori v1, v0, (0x4000 - 32) + mtc0 zero, C0_TAGLO + mtc0 zero, C0_TAGHI +1: + cache DCIndexWBInv, 0(v0) + cache ICIndexStTag, 0(v0) + bne v0, v1, 1b + addiu v0, v0, 32 + + /* Invalidate BTB */ + mfc0 v0, C0_Config, 7 + nop + ori v0, v0, 2 + mtc0 v0, C0_Config, 7 + nop + /* Jump to C code */ jal system_early_init nop |