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| author | Nicholas Piggin <npiggin@gmail.com> | 2018-02-20 20:08:29 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-03-31 15:47:50 +0200 |
| commit | 471d7ff8b51b63521c8ea35c51966ab4caa434ee (patch) | |
| tree | 697babe0784be6808eeb49f12cba44dc937af05e /arch/powerpc/kernel/prom_init.c | |
| parent | powerpc: Remove unused CPU_FTR_ARCH_201 (diff) | |
| download | linux-471d7ff8b51b63521c8ea35c51966ab4caa434ee.tar.xz linux-471d7ff8b51b63521c8ea35c51966ab4caa434ee.zip | |
powerpc/64s: Remove POWER4 support
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>
Diffstat (limited to 'arch/powerpc/kernel/prom_init.c')
| -rw-r--r-- | arch/powerpc/kernel/prom_init.c | 10 |
1 files changed, 1 insertions, 9 deletions
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c index 0323e073341d..e181fdea3da9 100644 --- a/arch/powerpc/kernel/prom_init.c +++ b/arch/powerpc/kernel/prom_init.c @@ -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); |