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| author | Joakim Tjernlund <Joakim.Tjernlund@transmode.se> | 2010-01-19 14:41:55 +0100 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2010-01-26 19:30:12 +0100 |
| commit | fc4e188789b01dc9f18c80869c43fdd7d1a51378 (patch) | |
| tree | bff9ddbb66b0e5946f1bf73da1021f3ce1befc0d /lib_ppc | |
| parent | 2903ad33a71251a3a87485b5b185852c8998f209 (diff) | |
| download | blackbird-obmc-uboot-fc4e188789b01dc9f18c80869c43fdd7d1a51378.tar.gz blackbird-obmc-uboot-fc4e188789b01dc9f18c80869c43fdd7d1a51378.zip | |
ppc: Loose GOT access in IRQ
Using the GOT in IRQ handlers requires r14 to be -ffixed-r14.
Avoid this by relocatate transfer_to_handler too.
This will allow to free up r14 later on.
Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Diffstat (limited to 'lib_ppc')
| -rw-r--r-- | lib_ppc/Makefile | 1 | ||||
| -rw-r--r-- | lib_ppc/reloc.S | 49 |
2 files changed, 50 insertions, 0 deletions
diff --git a/lib_ppc/Makefile b/lib_ppc/Makefile index 60a76253b2..334e457805 100644 --- a/lib_ppc/Makefile +++ b/lib_ppc/Makefile @@ -28,6 +28,7 @@ LIB = $(obj)lib$(ARCH).a SOBJS-y += ppccache.o SOBJS-y += ppcstring.o SOBJS-y += ticks.o +SOBJS-y += reloc.o COBJS-y += bat_rw.o COBJS-y += board.o diff --git a/lib_ppc/reloc.S b/lib_ppc/reloc.S new file mode 100644 index 0000000000..50f9a83fc6 --- /dev/null +++ b/lib_ppc/reloc.S @@ -0,0 +1,49 @@ +/* + * Copyright (C) 2009 Wolfgang Denk <wd@denx.de> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program 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 2 of + * the License, or (at your option) any later version. + * + * This program 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 this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <ppc_asm.tmpl> + + .file "reloc.S" + + .text +#ifndef CONFIG_NAND_SPL + /* + * Function: relocate entries for one exception vector + */ + .globl trap_reloc + .type trap_reloc, @function +trap_reloc: + lwz r0, 0(r7) /* hdlr ... */ + add r0, r0, r3 /* ... += dest_addr */ + stw r0, 0(r7) + + lwz r0, 4(r7) /* int_return ... */ + add r0, r0, r3 /* ... += dest_addr */ + stw r0, 4(r7) + + lwz r0, 8(r7) /* transfer_to_handler ...*/ + add r0, r0, r3 /* ... += dest_addr */ + stw r0, 8(r7) + + blr + .size trap_reloc, .-trap_reloc +#endif |
