Unlock cache on mpc824x
PATCH 1/1 Unlock cache on mpc824x
Hello,
MPC824x locks way0 of the cache while booting for use as initial RAM, but
it never unlocks it. The cache remains locked even after booting Linux.
Attached patch unlocks cache after relocation to RAM and invalidates locked entries.
--
Gleb.
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cpu/mpc824x/start.S +16 -1
@@ -526,11 +526,26 @@ stwu r0,-4(r7) bdnz 3b +4: +#if !defined(CONFIG_BMW) +/* Unlock the data cache and invalidate locked area */ + xor r0, r0, r0 + mtspr 1011, r0 + lis r4, CFG_INIT_RAM_ADDR at h + ori r4, r4, CFG_INIT_RAM_ADDR at l + li r0, 128 + mtctr r0 +41: + dcbi r0, r4 + addi r4, r4, 32 + bdnz 41b +#endif + /* * Now flush the cache: note that we must start from a cache aligned * address. Otherwise we might miss one cache line. */ -4: cmpwi r6,0 + cmpwi r6,0 add r5,r3,r5 beq 7f /* Always flush prefetch queue in any case */ subi r0,r6,1
PATCH 1/1 Unlock cache on mpc824x
Dear Gleb,
Quoted 6 lines · in message <[email protected]> you wrote:
MPC824x locks way0 of the cache while booting for use as initial RAM, but
it never unlocks it. The cache remains locked even after booting Linux.Attached patch unlocks cache after relocation to RAM and invalidates locked entries.
Added, thanks.
Ummm... can you please start attaching CHANGELOG entries with your patches?
Best regards,
Wolfgang Denk
Signature · 6 lines
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de
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