[PATCH] ARM: l2c: add options to overwrite prefetching behavior
From: Russell King - ARM Linux <hidden>
Date: 2015-05-14 09:58:56
Also in:
linux-devicetree
On Thu, May 14, 2015 at 01:42:00AM +0200, Hauke Mehrtens wrote:
quoted hunk
diff --git a/arch/arm/mm/cache-l2x0.c b/arch/arm/mm/cache-l2x0.c index e309c8f..f919548 100644 --- a/arch/arm/mm/cache-l2x0.c +++ b/arch/arm/mm/cache-l2x0.c@@ -1149,6 +1149,16 @@ static void __init l2c310_of_parse(const struct device_node *np, } } + if (of_property_read_bool(np, "arm,prefetch-data")) { + *aux_val |= L310_AUX_CTRL_DATA_PREFETCH; + *aux_mask &= ~L310_AUX_CTRL_DATA_PREFETCH; + } + + if (of_property_read_bool(np, "arm,prefetch-instr")) { + *aux_val |= L310_AUX_CTRL_INSTR_PREFETCH; + *aux_mask &= ~L310_AUX_CTRL_INSTR_PREFETCH; + } + prefetch = l2x0_saved_regs.prefetch_ctrl; ret = of_property_read_u32(np, "arm,double-linefill", &val);
Please move these down along-side the "arm,prefetch-offset" property parsing, and please update the prefetch value using L310_PREFETCH_CTRL_DATA_PREFETCH and L310_PREFETCH_CTRL_INSTR_PREFETCH instead. These are in fact the same bit, but let's try to keep the prefetch configuration all in one place and via the same method. -- FTTC broadband for 0.8mile line: currently at 10.5Mbps down 400kbps up according to speedtest.net.