diff options
| author | Alexey Brodkin <Alexey.Brodkin@synopsys.com> | 2017-08-01 12:58:47 +0300 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2017-08-04 13:56:34 +0530 |
| commit | 7d79cee2c6540ea64dd917a14e2fd63d4ac3d3c0 (patch) | |
| tree | 359b387e93411565dfd21dc446340bca12e0ab2c /arch/arc/mm | |
| parent | 2e332fec2f2c996f8d5447b0946ca43bb0ae4b42 (diff) | |
ARCv2: PAE40: Explicitly set MSB counterpart of SLC region ops addresses
It is necessary to explicitly set both SLC_AUX_RGN_START1 and SLC_AUX_RGN_END1
which hold MSB bits of the physical address correspondingly of region start
and end otherwise SLC region operation is executed in unpredictable manner
Without this patch, SLC flushes on HSDK (IOC disabled) were taking
seconds.
Cc: stable@vger.kernel.org #4.4+
Reported-by: Vladimir Kondratiev <vladimir.kondratiev@intel.com>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
[vgupta: PAR40 regs only written if PAE40 exist]
Diffstat (limited to 'arch/arc/mm')
| -rw-r--r-- | arch/arc/mm/cache.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/arch/arc/mm/cache.c b/arch/arc/mm/cache.c index bebc24cb7912..874913b3e826 100644 --- a/arch/arc/mm/cache.c +++ b/arch/arc/mm/cache.c @@ -665,6 +665,7 @@ noinline void slc_op(phys_addr_t paddr, unsigned long sz, const int op) static DEFINE_SPINLOCK(lock); unsigned long flags; unsigned int ctrl; + phys_addr_t end; spin_lock_irqsave(&lock, flags); @@ -694,8 +695,16 @@ noinline void slc_op(phys_addr_t paddr, unsigned long sz, const int op) * END needs to be setup before START (latter triggers the operation) * END can't be same as START, so add (l2_line_sz - 1) to sz */ - write_aux_reg(ARC_REG_SLC_RGN_END, (paddr + sz + l2_line_sz - 1)); - write_aux_reg(ARC_REG_SLC_RGN_START, paddr); + end = paddr + sz + l2_line_sz - 1; + if (is_pae40_enabled()) + write_aux_reg(ARC_REG_SLC_RGN_END1, upper_32_bits(end)); + + write_aux_reg(ARC_REG_SLC_RGN_END, lower_32_bits(end)); + + if (is_pae40_enabled()) + write_aux_reg(ARC_REG_SLC_RGN_START1, upper_32_bits(paddr)); + + write_aux_reg(ARC_REG_SLC_RGN_START, lower_32_bits(paddr)); /* Make sure "busy" bit reports correct stataus, see STAR 9001165532 */ read_aux_reg(ARC_REG_SLC_CTRL); |