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authorGregory CLEMENT <gregory.clement@free-electrons.com>2012-10-12 17:59:48 +0200
committerGregory CLEMENT <gregory.clement@free-electrons.com>2012-11-21 17:07:49 +0100
commit722202e10b488c14e93c428743a0e476093949e3 (patch)
tree204a0b63402b8d21dcc95699a7ce95de666d3919 /arch/arm/plat-orion
parent87b54e786afda828984645a8364a228ae8ac71f4 (diff)
downloadop-kernel-dev-722202e10b488c14e93c428743a0e476093949e3.zip
op-kernel-dev-722202e10b488c14e93c428743a0e476093949e3.tar.gz
arm: plat-orion: Add coherency attribute when setup mbus target
Recent SoC such as Armada 370/XP came with the possibility to deal with the I/O coherency by hardware. In this case the transaction attribute of the window must be flagged as "Shared transaction". Once this flag is set, then the transactions will be forced to be sent through the coherency block, in other case transaction is driven directly to DRAM. Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Reviewed-by: Yehuda Yitschak <yehuday@marvell.com> Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Diffstat (limited to 'arch/arm/plat-orion')
-rw-r--r--arch/arm/plat-orion/addr-map.c4
-rw-r--r--arch/arm/plat-orion/include/plat/addr-map.h1
2 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm/plat-orion/addr-map.c b/arch/arm/plat-orion/addr-map.c
index a7b8060..febe386 100644
--- a/arch/arm/plat-orion/addr-map.c
+++ b/arch/arm/plat-orion/addr-map.c
@@ -42,6 +42,8 @@ EXPORT_SYMBOL_GPL(mv_mbus_dram_info);
#define WIN_REMAP_LO_OFF 0x0008
#define WIN_REMAP_HI_OFF 0x000c
+#define ATTR_HW_COHERENCY (0x1 << 4)
+
/*
* Default implementation
*/
@@ -163,6 +165,8 @@ void __init orion_setup_cpu_mbus_target(const struct orion_addr_map_cfg *cfg,
w = &orion_mbus_dram_info.cs[cs++];
w->cs_index = i;
w->mbus_attr = 0xf & ~(1 << i);
+ if (cfg->hw_io_coherency)
+ w->mbus_attr |= ATTR_HW_COHERENCY;
w->base = base & 0xffff0000;
w->size = (size | 0x0000ffff) + 1;
}
diff --git a/arch/arm/plat-orion/include/plat/addr-map.h b/arch/arm/plat-orion/include/plat/addr-map.h
index ec63e4a..b76c065 100644
--- a/arch/arm/plat-orion/include/plat/addr-map.h
+++ b/arch/arm/plat-orion/include/plat/addr-map.h
@@ -17,6 +17,7 @@ struct orion_addr_map_cfg {
const int num_wins; /* Total number of windows */
const int remappable_wins;
void __iomem *bridge_virt_base;
+ int hw_io_coherency;
/* If NULL, the default cpu_win_can_remap will be used, using
the value in remappable_wins */
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