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authorMaciej W. Rozycki <macro@linux-mips.org>2018-11-13 22:42:37 +0000
committerPaul Burton <paul.burton@mips.com>2018-11-15 10:57:52 -0800
commit756d6d836dbfb04a5a486bc2ec89397aa4533737 (patch)
tree83aad12a01de16c52f4ff100f4e7e2d5cf702001 /arch/mips/Kconfig
parentMIPS: SiByte: Set 32-bit bus mask for BCM1250 PCI (diff)
downloadlinux-dev-756d6d836dbfb04a5a486bc2ec89397aa4533737.tar.xz
linux-dev-756d6d836dbfb04a5a486bc2ec89397aa4533737.zip
MIPS: SiByte: Enable ZONE_DMA32 for LittleSur
The LittleSur board is marked for high memory support and therefore clearly must provide a way to have enough memory installed for some to be present outside the low 4GiB physical address range. With the memory map of the BCM1250 SOC it has been built around it means over 1GiB of actual DRAM, as only the first 1GiB is mapped in the low 4GiB physical address range[1]. Complement commit cce335ae47e2 ("[MIPS] 64-bit Sibyte kernels need DMA32.") then and also enable ZONE_DMA32 for LittleSur. References: [1] "BCM1250/BCM1125/BCM1125H User Manual", Revision 1250_1125-UM100-R, Broadcom Corporation, 21 Oct 2002, Section 3: "System Overview", "Memory Map", pp. 34-38 Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Paul Burton <paul.burton@mips.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Patchwork: https://patchwork.linux-mips.org/patch/21107/ Fixes: cce335ae47e2 ("[MIPS] 64-bit Sibyte kernels need DMA32.") Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org
Diffstat (limited to '')
-rw-r--r--arch/mips/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 6eb17b4a617f..9579548a7de4 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -805,6 +805,7 @@ config SIBYTE_LITTLESUR
select SYS_SUPPORTS_BIG_ENDIAN
select SYS_SUPPORTS_HIGHMEM
select SYS_SUPPORTS_LITTLE_ENDIAN
+ select ZONE_DMA32 if 64BIT
config SIBYTE_SENTOSA
bool "Sibyte BCM91250E-Sentosa"