[U-Boot-Users] [PATCH] Fixup relocation patch.
joakim.tjernlund at transmode.se
Tue Feb 13 17:25:27 CET 2007
I tested this on my mpc832x based board and it worked for me as well.
I had to add -mrelocatable too though.
powerpc-softfloat-linux-gnu-gcc (GCC) 3.4.6 (Gentoo 3.4.6-r2,
GNU ld version 2.16.1
Question, why do remove 83xx here:
-#if defined(CONFIG_IP860) || defined(CONFIG_PCU_E) || \
- defined (CONFIG_FLAGADM) || defined(CONFIG_MPC83XX)
+#if defined(CONFIG_IP860) || defined(CONFIG_PCU_E) || defined (CONFIG_FLAGADM)
icache_enable (); /* it's time to enable the instruction cache */
On Tue, 2007-02-13 at 10:25 +0100, Txema Lopez wrote:
> Hi all,
> This is a patch to make relocation simpler and more reliable. It's for a
> 1.1.6 U-Boot version.
> The FIXUP section in U-Boot is empty so when U-Boot is relocated from
> flash to sdram these lines in the file start.S have no effect:
> * Now adjust the fixups and the pointers to the fixups
> * in case we need to move ourselves again.
> 2: li r0,__fixup_entries at sectoff@l
> lwz r3,GOT(_FIXUP_TABLE_)
> cmpwi r0,0
> mtctr r0
> addi r3,r3,-4
> beq 4f
> 3: lwzu r4,4(r3)
> lwzux r0,r4,r11
> add r0,r0,r11
> stw r10,0(r3)
> stw r0,0(r4)
> bdnz 3b
> Because of it, in some places of U-Boot the relocation must be done
> manually: i.e malloc_bin_reloc().
> I submit the patch only for the Lite5200 boards and the rest of boards
> will be not affected. If someone want to use or test the fixup
> relocation for his board only has to do two changes:
> - cleanup the fixup section from the text section in the u-boot.lds
> - define CFG_FIXUP_RELOCATION in the board configuration file.
> I'm not sure if this patch could work for not PowerPC based
> architectures. By example, taking a look in the U-Boot starting files
> for mips and bf533 cpu's, it seems that only the GOT section is
> relocated in ram, so the patch probably won't work.
> Signed-off-by: Jose Maria Lopez <tlopez at aotek.es>
> * Make relocation simpler and more reliable for Lite5200 boards:
> Patch by Jose Maria Lopez, 13 February 2007
> Best regards,
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