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powerpc/64s: Remove POWER4 support

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POWER4 has been broken since at least the change 49d09bf2a6
("powerpc/64s: Optimise MSR handling in exception handling"), which
requires mtmsrd L=1 support. This was introduced in ISA v2.01, and
POWER4 supports ISA v2.00.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Nicholas Piggin
2018-02-21 05:08:29 +10:00
committed by Michael Ellerman
parent 3735eb850e
commit 471d7ff8b5
10 changed files with 18 additions and 692 deletions
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10
arch/powerpc/kernel/prom_init.c
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@@ -1810,16 +1810,8 @@ static void __init prom_initialize_tce_table(void)
* size to 4 MB. This is enough to map 2GB of PCI DMA space.
* By doing this, we avoid the pitfalls of trying to DMA to
* MMIO space and the DMA alias hole.
*
* On POWER4, firmware sets the TCE region by assuming
* each TCE table is 8MB. Using this memory for anything
* else will impact performance, so we always allocate 8MB.
* Anton
*/
if (pvr_version_is(PVR_POWER4) || pvr_version_is(PVR_POWER4p))
minsize = 8UL << 20;
else
minsize = 4UL << 20;
minsize = 4UL << 20;
/* Align to the greater of the align or size */
align = max(minalign, minsize);