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ARM: 8391/1: l2c: add options to overwrite prefetching behavior

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These options make it possible to overwrites the data and instruction
prefetching behavior of the arm pl310 cache controller.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Hauke Mehrtens
2015-06-10 20:23:24 +01:00
committed by Russell King
parent 55af8a9164
commit ec3bd0e68a
2 changed files with 25 additions and 0 deletions
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20
arch/arm/mm/cache-l2x0.c
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@@ -1221,6 +1221,26 @@ static void __init l2c310_of_parse(const struct device_node *np,
pr_err("L2C-310 OF arm,prefetch-offset property value is missing\n");
}
ret = of_property_read_u32(np, "prefetch-data", &val);
if (ret == 0) {
if (val)
prefetch |= L310_PREFETCH_CTRL_DATA_PREFETCH;
else
prefetch &= ~L310_PREFETCH_CTRL_DATA_PREFETCH;
} else if (ret != -EINVAL) {
pr_err("L2C-310 OF prefetch-data property value is missing\n");
}
ret = of_property_read_u32(np, "prefetch-instr", &val);
if (ret == 0) {
if (val)
prefetch |= L310_PREFETCH_CTRL_INSTR_PREFETCH;
else
prefetch &= ~L310_PREFETCH_CTRL_INSTR_PREFETCH;
} else if (ret != -EINVAL) {
pr_err("L2C-310 OF prefetch-instr property value is missing\n");
}
l2x0_saved_regs.prefetch_ctrl = prefetch;
}