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| author | Richard Qin <richard.qin.x@gmail.com> | 2026-11-08 00:17:58 +0800 |
|---|---|---|
| committer | Richard Qin <richard.qin.x@gmail.com> | 2026-11-08 00:17:58 +0800 |
| commit | 7cedda09fc22abc03f5b2e2507c87cc7c480a6a2 (patch) | |
| tree | 9f8740b34be7ec512caffa75e5d51848c0b814c2 | |
| parent | a1dc82e274cd760aa51b6d618b7b15acc43196d6 (diff) | |
| download | rcc-project-7cedda09fc22abc03f5b2e2507c87cc7c480a6a2.tar.gz rcc-project-7cedda09fc22abc03f5b2e2507c87cc7c480a6a2.tar.xz | |
[mubios] Write mubios reset entry point
Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
| -rw-r--r-- | mubios/.gitignore | 3 | ||||
| -rw-r--r-- | mubios/arch/reset.S | 61 |
2 files changed, 63 insertions, 1 deletions
diff --git a/mubios/.gitignore b/mubios/.gitignore index 0f293b7..2a594d5 100644 --- a/mubios/.gitignore +++ b/mubios/.gitignore @@ -1 +1,2 @@ -*.qcow2
\ No newline at end of file +*.qcow2 +build* diff --git a/mubios/arch/reset.S b/mubios/arch/reset.S new file mode 100644 index 0000000..b3dbde2 --- /dev/null +++ b/mubios/arch/reset.S @@ -0,0 +1,61 @@ +# RCC-Project +# +# Copyright (C) 2026 Richard Qin +# +# This file is part of RCC-Project. +# +# RCC-Project is free software; you can redistribute it and/or modify it under +# the terms of the GNU General Public License as published by the Free +# Software Foundation; either version 3 of the License, or (at your option) any +# later version. +# +# RCC-Project is distributed in the hope that it will be useful, but WITHOUT ANY +# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR +# A PARTICULAR PURPOSE. See the GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License along with +# RCC-Project; see the file COPYING. If not see +# <http://www.gnu.org/licenses/>. + + .intel_syntax noprefix + .code16 + + .section .text16, "ax" + + .global reset_entry + .type reset_entry, @function + +reset_entry: + cli + cld + + xor ax, ax + mov ds, ax + mov es, ax + mov ss, ax + mov sp, 0x8000 + +reset_halt: + hlt + jmp reset_halt + + .section .reset, "ax" + + .global reset_vector + +reset_vector: + cli + + /* + * The linker places .text16 at physical address 0xF0000. + * F000:0000 therefore reaches the first 16-bit entry. + */ + .byte 0xEA + .word 0x0000 + .word 0xF000 + + .fill 16 - (. - reset_vector), 1, 0x90 + + + + |