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| author | Becky Bruce <becky.bruce@freescale.com> | 2008-11-05 14:55:34 -0600 |
|---|---|---|
| committer | Jon Loeliger <jdl@freescale.com> | 2008-11-10 10:10:03 -0600 |
| commit | c1e1cf69547b138173f87a7f81c42a5d8dbfde3d (patch) | |
| tree | a2d57f65e352a08aa94181785b3541926f4b3aff /cpu/mpc86xx | |
| parent | 6bf98b1362f0cb237620355ed3e6762fff82388d (diff) | |
| download | bootable_bootloader_goldelico_gta04-c1e1cf69547b138173f87a7f81c42a5d8dbfde3d.zip bootable_bootloader_goldelico_gta04-c1e1cf69547b138173f87a7f81c42a5d8dbfde3d.tar.gz bootable_bootloader_goldelico_gta04-c1e1cf69547b138173f87a7f81c42a5d8dbfde3d.tar.bz2 | |
mpc86xx: Use SRR0/1/rfi to enable address translation, not blr
Using a mtmsr/blr means that you have to be executing at the
same virtual address once you enable translation. This is
unnecessarily restrictive, and is not really how this is
usually done. Change it to use the more common mtspr SRR0/SRR1
and rfi method.
Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Diffstat (limited to 'cpu/mpc86xx')
| -rw-r--r-- | cpu/mpc86xx/start.S | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/cpu/mpc86xx/start.S b/cpu/mpc86xx/start.S index 0d30e91..7e36801 100644 --- a/cpu/mpc86xx/start.S +++ b/cpu/mpc86xx/start.S @@ -244,9 +244,15 @@ in_flash: */ /* enable address translation */ - bl enable_addr_trans - sync + mfmsr r5 + ori r5, r5, (MSR_IR | MSR_DR) + lis r3,addr_trans_enabled@h + ori r3, r3, addr_trans_enabled@l + mtspr SPRN_SRR0,r3 + mtspr SPRN_SRR1,r5 + rfi +addr_trans_enabled: /* enable and invalidate the data cache */ /* bl l1dcache_enable */ bl dcache_enable @@ -423,15 +429,6 @@ tlblp: blt tlblp blr - .globl enable_addr_trans -enable_addr_trans: - /* enable address translation */ - mfmsr r5 - ori r5, r5, (MSR_IR | MSR_DR) - mtmsr r5 - isync - blr - .globl disable_addr_trans disable_addr_trans: /* disable address translation */ |