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| author | Scott Wood <scottwood@freescale.com> | 2015-04-23 20:01:56 -0500 |
|---|---|---|
| committer | York Sun <yorksun@freescale.com> | 2015-05-04 09:23:18 -0700 |
| commit | e1bfd1c6b7bc0dc530247fd9108feba3147adf36 (patch) | |
| tree | 68df91628d859ad6d47e9713226cb65e04a0b71c | |
| parent | ace97d26176a3ebc9ec07738450de93eea35975c (diff) | |
| download | talos-obmc-uboot-e1bfd1c6b7bc0dc530247fd9108feba3147adf36.tar.gz talos-obmc-uboot-e1bfd1c6b7bc0dc530247fd9108feba3147adf36.zip | |
powerpc/mpc85xx: Use GOT when loading IVORs post-relocation
Commit 96d2bb952bb ("powerpc/mpc85xx: Don't relocate exception vectors")
simplified IVOR initialization a bit too much, failing to use the
post-relocation offset. This doesn't cause a problem with normal NOR
boot, in which both the pre-relocation and post-relocation addresses
are 64 KiB aligned. However, if TEXT_BASE is only 4 KiB aligned, such
as for NAND/SD/etc. boot on some targets, as well as the QEMU target,
the post-relocation address will not be the same in the lower 16 bits,
as reserve_uboot() ensures that the relocation address is always 64
KiB aligned even if the pre-relocation address was not.
Use the GOT to get the proper post-relocation offsets.
Fixes: 96d2bb952bb ("powerpc/mpc85xx: Don't relocate exception vectors")
Signed-off-by: Scott Wood <scottwood@freescale.com>
Cc: Alexander Graf <agraf@suse.de>
Cc: Shaohui Xie <Shaohui.Xie@freescale.com>
Tested-by: Shaohui Xie <Shaohui.Xie@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
| -rw-r--r-- | arch/powerpc/cpu/mpc85xx/start.S | 35 |
1 files changed, 20 insertions, 15 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/start.S b/arch/powerpc/cpu/mpc85xx/start.S index 28f04eefab..e61d8e0fc2 100644 --- a/arch/powerpc/cpu/mpc85xx/start.S +++ b/arch/powerpc/cpu/mpc85xx/start.S @@ -1664,41 +1664,46 @@ clear_bss: */ .globl trap_init trap_init: + mflr r11 + bl _GLOBAL_OFFSET_TABLE_-4 + mflr r12 + /* Update IVORs as per relocation */ mtspr IVPR,r3 - li r4,CriticalInput@l + lwz r4,CriticalInput@got(r12) mtspr IVOR0,r4 /* 0: Critical input */ - li r4,MachineCheck@l + lwz r4,MachineCheck@got(r12) mtspr IVOR1,r4 /* 1: Machine check */ - li r4,DataStorage@l + lwz r4,DataStorage@got(r12) mtspr IVOR2,r4 /* 2: Data storage */ - li r4,InstStorage@l + lwz r4,InstStorage@got(r12) mtspr IVOR3,r4 /* 3: Instruction storage */ - li r4,ExtInterrupt@l + lwz r4,ExtInterrupt@got(r12) mtspr IVOR4,r4 /* 4: External interrupt */ - li r4,Alignment@l + lwz r4,Alignment@got(r12) mtspr IVOR5,r4 /* 5: Alignment */ - li r4,ProgramCheck@l + lwz r4,ProgramCheck@got(r12) mtspr IVOR6,r4 /* 6: Program check */ - li r4,FPUnavailable@l + lwz r4,FPUnavailable@got(r12) mtspr IVOR7,r4 /* 7: floating point unavailable */ - li r4,SystemCall@l + lwz r4,SystemCall@got(r12) mtspr IVOR8,r4 /* 8: System call */ /* 9: Auxiliary processor unavailable(unsupported) */ - li r4,Decrementer@l + lwz r4,Decrementer@got(r12) mtspr IVOR10,r4 /* 10: Decrementer */ - li r4,IntervalTimer@l + lwz r4,IntervalTimer@got(r12) mtspr IVOR11,r4 /* 11: Interval timer */ - li r4,WatchdogTimer@l + lwz r4,WatchdogTimer@got(r12) mtspr IVOR12,r4 /* 12: Watchdog timer */ - li r4,DataTLBError@l + lwz r4,DataTLBError@got(r12) mtspr IVOR13,r4 /* 13: Data TLB error */ - li r4,InstructionTLBError@l + lwz r4,InstructionTLBError@got(r12) mtspr IVOR14,r4 /* 14: Instruction TLB error */ - li r4,DebugBreakpoint@l + lwz r4,DebugBreakpoint@got(r12) mtspr IVOR15,r4 /* 15: Debug */ + mtlr r11 blr .globl unlock_ram_in_cache |
