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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 /cpu/mpc512x/start.S | |
| parent | 2903ad33a71251a3a87485b5b185852c8998f209 (diff) | |
| download | u-boot-imx-fc4e188789b01dc9f18c80869c43fdd7d1a51378.zip u-boot-imx-fc4e188789b01dc9f18c80869c43fdd7d1a51378.tar.gz u-boot-imx-fc4e188789b01dc9f18c80869c43fdd7d1a51378.tar.bz2 | |
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 'cpu/mpc512x/start.S')
| -rw-r--r-- | cpu/mpc512x/start.S | 35 |
1 files changed, 3 insertions, 32 deletions
diff --git a/cpu/mpc512x/start.S b/cpu/mpc512x/start.S index 4edc8e9..46c5efa 100644 --- a/cpu/mpc512x/start.S +++ b/cpu/mpc512x/start.S @@ -127,30 +127,15 @@ Alignment: mfspr r5,DSISR stw r5,_DSISR(r21) addi r3,r1,STACK_FRAME_OVERHEAD - li r20,MSR_KERNEL - rlwimi r20,r23,0,16,16 /* copy EE bit from saved MSR */ - rlwimi r20,r23,0,25,25 /* copy IP bit from saved MSR */ - lwz r6,GOT(transfer_to_handler) - mtlr r6 - blrl -.L_Alignment: - .long AlignmentException - _start + EXC_OFF_SYS_RESET - .long int_return - _start + EXC_OFF_SYS_RESET + EXC_XFER_TEMPLATE(Alignment, AlignmentException, MSR_KERNEL, COPY_EE) /* Program check exception */ . = 0x700 ProgramCheck: EXCEPTION_PROLOG(SRR0, SRR1) addi r3,r1,STACK_FRAME_OVERHEAD - li r20,MSR_KERNEL - rlwimi r20,r23,0,16,16 /* copy EE bit from saved MSR */ - rlwimi r20,r23,0,25,25 /* copy IP bit from saved MSR */ - lwz r6,GOT(transfer_to_handler) - mtlr r6 - blrl -.L_ProgramCheck: - .long ProgramCheckException - _start + EXC_OFF_SYS_RESET - .long int_return - _start + EXC_OFF_SYS_RESET + EXC_XFER_TEMPLATE(ProgramCheck, ProgramCheckException, + MSR_KERNEL, COPY_EE) /* Floating Point Unit unavailable exception */ STD_EXCEPTION(0x800, FPUnavailable, UnknownException) @@ -723,17 +708,3 @@ trap_init: mtlr r4 /* restore link register */ blr - - /* - * Function: relocate entries for one exception vector - */ -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) - - blr |