forked from pool/grub2
73 lines
2.2 KiB
Diff
73 lines
2.2 KiB
Diff
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From 303109b36a45f53400cbcdaf2ad90ca5790ce1d6 Mon Sep 17 00:00:00 2001
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From: Anton Blanchard <anton@samba.org>
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Date: Wed, 29 Jan 2014 10:41:29 +1100
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Subject: [PATCH 15/23] Add 64bit support to powerpc startup code
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Add 64bit support to powerpc startup code
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From: Anton Blanchard <anton@samba.org>
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Signed-off-by: Ram Pai <linuxram@us.ibm.com>
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---
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grub-core/kern/powerpc/ieee1275/startup.S | 33 +++++++++++++++++++++++++++----
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1 file changed, 29 insertions(+), 4 deletions(-)
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diff --git a/grub-core/kern/powerpc/ieee1275/startup.S b/grub-core/kern/powerpc/ieee1275/startup.S
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index 21c884b..03f80d8 100644
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--- a/grub-core/kern/powerpc/ieee1275/startup.S
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+++ b/grub-core/kern/powerpc/ieee1275/startup.S
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@@ -19,15 +19,28 @@
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#include <grub/symbol.h>
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#include <grub/offsets.h>
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+#include <ppc-asm.h>
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.extern __bss_start
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.extern _end
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.text
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- .align 2
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- .globl start, _start
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-start:
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-_start:
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+
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+FUNC_START(_start)
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+
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+#if defined(_CALL_ELF) && _CALL_ELF == 2 /* LITTLE ENDIAN */
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+ tdi 0,0,0x48 /* Reverse endian of b . + 8 */
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+ b $+36 /* Skip trampoline if already LE mode */
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+ .long 0x05009f42 /* bcl 20,31,$+4 */
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+ .long 0xa602487d /* mflr r10 */
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+ .long 0x1c004a39 /* addi r10,r10,28 */
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+ .long 0xa600607d /* mfmsr r11 */
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+ .long 0x01006b69 /* xori r11,r11,1 */
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+ .long 0xa6035a7d /* mtsrr0 r10 */
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+ .long 0xa6037b7d /* mtsrr1 r11 */
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+ .long 0x2400004c /* rfid */
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+#endif
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+
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li 2, 0
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li 13, 0
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@@ -61,7 +74,19 @@ _start:
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/* Store r5 in grub_ieee1275_entry_fn. */
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lis 9, grub_ieee1275_entry_fn@ha
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+#if defined(_CALL_ELF) && _CALL_ELF == 1 /* BIG ENDIAN */
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+ std 5, grub_ieee1275_entry_fn@l(9)
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+#else
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stw 5, grub_ieee1275_entry_fn@l(9)
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+#endif
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+
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+#if defined(_CALL_ELF) && _CALL_ELF == 2 /* LITTLE ENDIAN */
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+ bl 3f
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+3: mflr 9
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+ addis 2,9,.TOC.-3b@ha
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+ addi 2,2,.TOC.-3b@l
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+#endif
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bl grub_main
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1: b 1b
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+FUNC_END(_start)
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--
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1.8.3.1
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