From 6e7a315eb67cb6c113cf37e1d66c4f11a51a2b3e Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 18:29:51 +0200 Subject: Adding upstream version 2.06. Signed-off-by: Daniel Baumann --- grub-core/kern/powerpc/ieee1275/startup.S | 67 +++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 grub-core/kern/powerpc/ieee1275/startup.S (limited to 'grub-core/kern/powerpc/ieee1275/startup.S') diff --git a/grub-core/kern/powerpc/ieee1275/startup.S b/grub-core/kern/powerpc/ieee1275/startup.S new file mode 100644 index 0000000..21c884b --- /dev/null +++ b/grub-core/kern/powerpc/ieee1275/startup.S @@ -0,0 +1,67 @@ +/* startup.S - Startup code for the PowerPC. */ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2003,2004,2005,2007,2008 Free Software Foundation, Inc. + * + * GRUB 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. + * + * GRUB 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 GRUB. If not, see . + */ + +#include +#include + +.extern __bss_start +.extern _end + + .text + .align 2 + .globl start, _start +start: +_start: + li 2, 0 + li 13, 0 + + /* Stage1 won't zero BSS for us. In other cases, why not do it again? */ + lis 6, (__bss_start - 4)@h + ori 6, 6, (__bss_start - 4)@l + +2: stb 2, 4(6) + addi 6, 6, 1 + andi. 7, 6, 3 + cmpi 0, 1, 7, 0 + bne 2b + + lis 7, (_end - 4)@h + ori 7, 7, (_end - 4)@l + subf 7, 6, 7 + subi 8, 7, 1 + andi. 8, 8, 3 + addi 8, 8, 1 + sub 7, 7, 8 + + srwi 7, 7, 2 /* We store 4 bytes at a time. */ + mtctr 7 +2: stwu 2, 4(6) /* We know r2 is already 0 from above. */ + bdnz 2b + + mtctr 8 +2: stb 2, 4(6) /* We know r2 is already 0 from above. */ + addi 6, 6, 1 + bdnz 2b + + /* Store r5 in grub_ieee1275_entry_fn. */ + lis 9, grub_ieee1275_entry_fn@ha + stw 5, grub_ieee1275_entry_fn@l(9) + + bl grub_main +1: b 1b -- cgit v1.2.3