The AXI protocol specifies that the write response can only be sent back to an AXI master when the last write data has been accepted. This optimization enables the PL310 to send the write response of certain write transactions as soon as the store buffer accepts the write address. This behavior is not compatible with the AXI protocol and is disabled by default. You enable this optimization by setting the Early BRESP Enable bit in the Auxiliary Control Register (bit [30]). Signed-off-by: Santosh Shilimkar <santosh.shilimkar@xxxxxx> Signed-off-by: Mans Rullgard <mans@xxxxxxxxx> Tested-by: Nishanth Menon <nm@xxxxxx> --- arch/arm/mach-omap2/omap4-common.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/arch/arm/mach-omap2/omap4-common.c b/arch/arm/mach-omap2/omap4-common.c index 2006da1..e7a9b7f 100644 --- a/arch/arm/mach-omap2/omap4-common.c +++ b/arch/arm/mach-omap2/omap4-common.c @@ -82,7 +82,8 @@ static int __init omap_l2_cache_init(void) aux_ctrl |= ((0x3 << L2X0_AUX_CTRL_WAY_SIZE_SHIFT) | (1 << L2X0_AUX_CTRL_SHARE_OVERRIDE_SHIFT) | (1 << L2X0_AUX_CTRL_DATA_PREFETCH_SHIFT) | - (1 << L2X0_AUX_CTRL_INSTR_PREFETCH_SHIFT)); + (1 << L2X0_AUX_CTRL_INSTR_PREFETCH_SHIFT) | + (1 << L2X0_AUX_CTRL_EARLY_BRESP_SHIFT)); } if (omap_rev() != OMAP4430_REV_ES1_0) omap_smc1(0x109, aux_ctrl); -- 1.6.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
