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grub2/grub2-ppc64le-14-Add-powerpc64-ieee1275-trampoline.patch

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Accepting request 229655 from home:k0da:branches:Base:System - Build GRUB2 for ppc64le as LittleEndian and 64bit - Fix timeout issue on ppc64le (bnc#869166) - Add powerpc-utils requires to grub2-powerpc-ieee1275 - added patches: * grub2-ppc64-build-ppc64-32bit.patch * grub2-ppc64-qemu.patch * grub2-ppc64le-01-Add-Little-Endian-support-for-Power64-to-the-build.patch * grub2-ppc64le-02-Build-grub-as-O1-until-we-add-savegpr-and-restgpr-ro.patch * grub2-ppc64le-03-disable-creation-of-vsx-and-altivec-instructions.patch * grub2-ppc64le-04-powerpc64-LE-s-linker-knows-how-to-handle-the-undefi.patch * grub2-ppc64le-05-grub-install-can-now-recognize-and-install-a-LE-grub.patch * grub2-ppc64le-06-set-the-ABI-version-to-0x02-in-the-e_flag-of-the-PPC.patch * grub2-ppc64le-07-Add-IEEE1275_ADDR-helper.patch * grub2-ppc64le-08-Fix-some-more-warnings-when-casting.patch * grub2-ppc64le-09-Add-powerpc64-types.patch * grub2-ppc64le-10-powerpc64-is-not-necessarily-BigEndian-anymore.patch * grub2-ppc64le-11-Fix-warnings-when-building-powerpc-linux-loader-64bi.patch * grub2-ppc64le-12-GRUB_ELF_R_PPC_-processing-is-applicable-only-for-32.patch * grub2-ppc64le-13-Fix-powerpc-setjmp-longjmp-64bit-issues.patch * grub2-ppc64le-14-Add-powerpc64-ieee1275-trampoline.patch * grub2-ppc64le-15-Add-64bit-support-to-powerpc-startup-code.patch * grub2-ppc64le-16-Add-grub_dl_find_section_addr.patch * grub2-ppc64le-17-Add-ppc64-relocations.patch * grub2-ppc64le-18-ppc64-doesn-t-need-libgcc-routines.patch * grub2-ppc64le-19-Use-FUNC_START-FUNC_END-for-powerpc-function-definit.patch * grub2-ppc64le-20-.TOC.-symbol-is-special-in-ppc64le-.-It-maps-to-the-.patch * grub2-ppc64le-21-the-.toc-section-in-powerpc64le-modules-are-sometime.patch * grub2-ppc64le-22-all-parameter-to-firmware-calls-should-to-be-BigEndi.patch * grub2-ppc64le-23-grub-segfaults-if-initrd-is-specified-before-specify.patch * grub2-ppc64le-timeout.patch OBS-URL: https://build.opensuse.org/request/show/229655 OBS-URL: https://build.opensuse.org/package/show/Base:System/grub2?expand=0&rev=87
2014-04-11 04:43:28 +02:00
From dc0b31e8fe09b4143488e85a7aeb7c532e48f81d Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Wed, 29 Jan 2014 10:40:17 +1100
Subject: [PATCH 14/23] Add powerpc64 ieee1275 trampoline
Add a trampoline so a 64bit grub can call a 32 bit OF
Signed-off-by: Ram Pai <linuxram@us.ibm.com>
From: Anton Blanchard <anton@samba.org>
---
grub-core/Makefile.core.def | 1 +
grub-core/kern/powerpc/ieee1275/entry.S | 150 +++++++++++++++++++++++++++++++
include/grub/powerpc/ieee1275/ieee1275.h | 6 ++
3 files changed, 157 insertions(+)
create mode 100644 grub-core/kern/powerpc/ieee1275/entry.S
diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
index 42443bc..9563eeb 100644
--- a/grub-core/Makefile.core.def
+++ b/grub-core/Makefile.core.def
@@ -252,6 +252,7 @@ kernel = {
powerpc_ieee1275 = kern/powerpc/cache.S;
powerpc_ieee1275 = kern/powerpc/dl.c;
+ powerpc_ieee1275 = kern/powerpc/ieee1275/entry.S;
sparc64_ieee1275 = kern/sparc64/cache.S;
sparc64_ieee1275 = kern/sparc64/dl.c;
diff --git a/grub-core/kern/powerpc/ieee1275/entry.S b/grub-core/kern/powerpc/ieee1275/entry.S
new file mode 100644
index 0000000..5d58149
--- /dev/null
+++ b/grub-core/kern/powerpc/ieee1275/entry.S
@@ -0,0 +1,150 @@
+/* entry.S - open firmware call entry and return */
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2004,2007,2010,2014 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include <ppc-asm.h>
+
+#define STACK_FRAME_SIZE (48 + 64 + 16 + 144)
+#define MSR_OFFSET (48 + 64)
+#define R13_OFFSET (MSR_OFFSET + 8)
+#define NVREG_OFFSET(i) (STACK_FRAME_SIZE - (32-(i))*8)
+#define SAVE_NVGPR(A) std (A),NVREG_OFFSET(A)(r1)
+#define REST_NVGPR(A) ld (A),NVREG_OFFSET(A)(r1)
+#define SPRN_SRR0 0x01A
+#define SPRN_SRR1 0x01B
+#define r1 sp
+
+
+#if defined(_CALL_ELF) && _CALL_ELF == 1 /* BIG ENDIAN */
+#define TOC_OFFSET 40
+#define r2 toc
+#endif
+
+/*
+ * OF runs in 32 bit mode so it clobbers the high 32 bits of all registers
+ * it saves. We save and restore all the non volatile registers to avoid
+ * this issue.
+ *
+ * unsigned int ieee1275_call_entry_fn(void *args, unsigned long entry);
+ */
+FUNC_START(ieee1275_call_entry_fn)
+ mflr r0
+ std r0,16(r1)
+ stdu r1,-STACK_FRAME_SIZE(r1)
+
+#if defined(_CALL_ELF) && _CALL_ELF == 1 /* BIG ENDIAN */
+ std r2,TOC_OFFSET(r1)
+#endif
+ std r13,R13_OFFSET(r1)
+
+ SAVE_NVGPR(r14)
+ SAVE_NVGPR(r15)
+ SAVE_NVGPR(r16)
+ SAVE_NVGPR(r17)
+ SAVE_NVGPR(r18)
+ SAVE_NVGPR(r19)
+ SAVE_NVGPR(r20)
+ SAVE_NVGPR(r21)
+ SAVE_NVGPR(r22)
+ SAVE_NVGPR(r23)
+ SAVE_NVGPR(r24)
+ SAVE_NVGPR(r25)
+ SAVE_NVGPR(r26)
+ SAVE_NVGPR(r27)
+ SAVE_NVGPR(r28)
+ SAVE_NVGPR(r29)
+ SAVE_NVGPR(r30)
+ SAVE_NVGPR(r31)
+
+ mfmsr r31
+ std r31, MSR_OFFSET(r1)
+
+ /* Clear 64bit mode */
+ rldicl r31,r31,0,1
+
+#if defined(_CALL_ELF) && _CALL_ELF == 2 /* LITTLE ENDIAN */
+ /* Clear LE mode */
+ rldicr r31,r31,0,62
+#endif
+
+ mtspr SPRN_SRR0,r4
+ mtspr SPRN_SRR1,r31
+
+ /* Point the LR at our return code */
+ bl 1f
+1: mflr r30
+ addi r30,r30,(2f - 1b)
+ mtlr r30
+
+ /* Call OF */
+ rfid
+
+#if defined(_CALL_ELF) && _CALL_ELF == 2 /* LITTLE ENDIAN */
+2: .long 0x05009f42 /* bcl 20,31,$+4 */
+ .long 0xa602487d /* mflr r10 */
+ .long 0x1c004a39 /* addi r10,r10,28 */
+ .long 0xa6035a7d /* mtsrr0 r10 */
+ .long 0xa600407d /* mfmsr r10 */
+ .long 0x01004a69 /* xori r10,r10,1 */
+ .long 0xa6035b7d /* mtsrr1 r10 */
+ .long 0x2400004c /* rfid */
+#endif
+
+ /* Clear the top 32 bits of r1, just in case */
+2: rldicl r1,r1,0,32
+
+ /* Reset our MSR */
+ ld r31,MSR_OFFSET(r1)
+ mtspr SPRN_SRR1,r31
+
+ bl 3f
+3: mflr r30
+ addi r30,r30,(4f - 3b)
+ mtspr SPRN_SRR0,r30
+
+ rfid
+
+#if defined(_CALL_ELF) && _CALL_ELF == 1 /* BIG ENDIAN */
+4: ld r2,TOC_OFFSET(r1)
+#endif
+4: ld r13,R13_OFFSET(r1)
+
+ REST_NVGPR(r14)
+ REST_NVGPR(r15)
+ REST_NVGPR(r16)
+ REST_NVGPR(r17)
+ REST_NVGPR(r18)
+ REST_NVGPR(r19)
+ REST_NVGPR(r20)
+ REST_NVGPR(r21)
+ REST_NVGPR(r22)
+ REST_NVGPR(r23)
+ REST_NVGPR(r24)
+ REST_NVGPR(r25)
+ REST_NVGPR(r26)
+ REST_NVGPR(r27)
+ REST_NVGPR(r28)
+ REST_NVGPR(r29)
+ REST_NVGPR(r30)
+ REST_NVGPR(r31)
+
+ addi r1,r1,STACK_FRAME_SIZE
+ ld r0,16(r1)
+ mtlr r0
+ blr
+FUNC_END(ieee1275_call_entry_fn)
diff --git a/include/grub/powerpc/ieee1275/ieee1275.h b/include/grub/powerpc/ieee1275/ieee1275.h
index 3c7683f..14bdc43 100644
--- a/include/grub/powerpc/ieee1275/ieee1275.h
+++ b/include/grub/powerpc/ieee1275/ieee1275.h
@@ -25,4 +25,10 @@
#define GRUB_IEEE1275_CELL_SIZEOF 4
typedef grub_uint32_t grub_ieee1275_cell_t;
+#ifdef __powerpc64__
+int EXPORT_FUNC(ieee1275_call_entry_fn)(void *args, void *entry);
+#define IEEE1275_CALL_ENTRY_FN(args) \
+ ieee1275_call_entry_fn((args), grub_ieee1275_entry_fn)
+#endif
+
#endif /* ! GRUB_IEEE1275_MACHINE_HEADER */
--
1.8.3.1
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