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| author | Joakim Tjernlund <Joakim.Tjernlund@transmode.se> | 2010-01-19 14:41:56 +0100 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2010-01-26 19:30:13 +0100 |
| commit | 0f8aa159175385ddd77bc91d11b9568583fbbd0c (patch) | |
| tree | 5f2bd327b499525805cb7672eb7fca600ea5376e /cpu/mpc8260/start.S | |
| parent | fc4e188789b01dc9f18c80869c43fdd7d1a51378 (diff) | |
| download | u-boot-imx-0f8aa159175385ddd77bc91d11b9568583fbbd0c.zip u-boot-imx-0f8aa159175385ddd77bc91d11b9568583fbbd0c.tar.gz u-boot-imx-0f8aa159175385ddd77bc91d11b9568583fbbd0c.tar.bz2 | |
ppc: Use r12 instead of r14 as GOT pointer.
r14 is not supposed to be clobbered by functions. Switch
to r12 and call GET_GOT when needed. This will allow u-boot
to loose the -ffixed-r14 gcc option.
Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Diffstat (limited to 'cpu/mpc8260/start.S')
| -rw-r--r-- | cpu/mpc8260/start.S | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/cpu/mpc8260/start.S b/cpu/mpc8260/start.S index 7d80af5..1fc70bc 100644 --- a/cpu/mpc8260/start.S +++ b/cpu/mpc8260/start.S @@ -56,7 +56,7 @@ /* * Set up GOT: Global Offset Table * - * Use r14 to access the GOT + * Use r12 to access the GOT */ START_GOT GOT_ENTRY(_GOT2_TABLE_) @@ -650,7 +650,9 @@ init_debug: /* RAM should now be operational */ #define VEC_WRD_CNT ((_end_of_vectors - _start + EXC_OFF_SYS_RESET) / 4) - + mflr r3 + GET_GOT + mtlr r3 lwz r3, GOT(_end_of_vectors) rlwinm r4, r3, 0, 18, 31 /* _end_of_vectors & 0x3FFF */ lis r5, VEC_WRD_CNT@h @@ -792,6 +794,7 @@ relocate_code: mr r9, r4 /* Save copy of Global Data pointer */ mr r10, r5 /* Save copy of Destination Address */ + GET_GOT mr r3, r5 /* Destination Address */ lis r4, CONFIG_SYS_MONITOR_BASE@h /* Source Address */ ori r4, r4, CONFIG_SYS_MONITOR_BASE@l @@ -809,7 +812,7 @@ relocate_code: sub r15, r10, r4 /* First our own GOT */ - add r14, r14, r15 + add r12, r12, r15 /* then the one used by the C code */ add r30, r30, r15 @@ -882,7 +885,7 @@ relocate_code: in_ram: /* - * Relocation Function, r14 point to got2+0x8000 + * Relocation Function, r12 point to got2+0x8000 * * Adjust got2 pointers, no need to check for 0, this code * already puts a few entries in the table. @@ -958,6 +961,8 @@ clear_bss: */ .globl trap_init trap_init: + mflr r4 /* save link register */ + GET_GOT lwz r7, GOT(_start) lwz r8, GOT(_end_of_vectors) @@ -965,8 +970,6 @@ trap_init: cmplw 0, r7, r8 bgelr /* return if r7>=r8 - just in case */ - - mflr r4 /* save link register */ 1: lwz r0, 0(r7) stw r0, 0(r9) |