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ARM: highbank: enable DMA zone for LPAE 

Some devices are restricted to 32-bit DMA. Thus the platform dma_zone_size
needs to be set. Otherwise dma-mapping code is complaining, e.g.

calxedaxgmac fff50000.ethernet: coherent DMA mask 0xffffffff is smaller
than system GFP_DMA mask 0xffffffffffffffff

Signed-off-by: Andreas Herrmann <andreas.herrmann@calxeda.com>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
hifive-unleashed-5.1
Rob Herring 2013-08-01 15:50:55 -05:00
parent 364230b995
commit a6a398341d
2 changed files with 4 additions and 0 deletions
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1
arch/arm/mach-highbank/Kconfig
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@ -18,3 +18,4 @@ config ARCH_HIGHBANK
select PL320_MBOX
select SPARSE_IRQ
select USE_OF
select ZONE_DMA if ARM_LPAE

3
arch/arm/mach-highbank/highbank.c
View File

@ -176,6 +176,9 @@ static const char *highbank_match[] __initconst = {
};
DT_MACHINE_START(HIGHBANK, "Highbank")
#if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE)
.dma_zone_size = (4ULL * SZ_1G),
#endif
.smp = smp_ops(highbank_smp_ops),
.init_irq = highbank_init_irq,
.init_time = highbank_timer_init,