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| author | Hauke Mehrtens <hauke@hauke-m.de> | 2015-06-10 21:23:24 +0200 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2015-06-11 00:53:26 +0200 |
| commit | ec3bd0e68a679a7af2c46af1ddc9af8b534a8b0e (patch) | |
| tree | ffe9d99b2cfd8a25f557dd1908bafbbe2921a746 /arch/arm/mm/cache-l2x0.c | |
| parent | ARM: 8387/1: arm/mm/dma-mapping.c: Add arm_coherent_dma_mmap (diff) | |
| download | linux-ec3bd0e68a679a7af2c46af1ddc9af8b534a8b0e.tar.xz linux-ec3bd0e68a679a7af2c46af1ddc9af8b534a8b0e.zip | |
ARM: 8391/1: l2c: add options to overwrite prefetching behavior
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>
Diffstat (limited to 'arch/arm/mm/cache-l2x0.c')
| -rw-r--r-- | arch/arm/mm/cache-l2x0.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/arm/mm/cache-l2x0.c b/arch/arm/mm/cache-l2x0.c index 90599f60ff02..71b3d3309024 100644 --- a/arch/arm/mm/cache-l2x0.c +++ b/arch/arm/mm/cache-l2x0.c @@ -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; } |