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author | ian <ian@FreeBSD.org> | 2014-05-18 00:26:42 +0000 |
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committer | ian <ian@FreeBSD.org> | 2014-05-18 00:26:42 +0000 |
commit | 3991eff3e4c15e6e4e9f5b9d444ba72dbbdf5b41 (patch) | |
tree | 3cda09d68f8d1f94705b76fe952a15e98383238d /sys/arm/freescale | |
parent | 1facc10d63c43e5823ab879fbb0f3d0d9a0e49ae (diff) | |
download | FreeBSD-src-3991eff3e4c15e6e4e9f5b9d444ba72dbbdf5b41.zip FreeBSD-src-3991eff3e4c15e6e4e9f5b9d444ba72dbbdf5b41.tar.gz |
MFC 265440, 265441, 265444, 265445, 265446, 265447:
Move the pl310.enabled tunable to hw.pl310.enabled. Clean up a few minor
style(9) nits. Use DEVMETHOD_END.
Break out the code that figures out the L2 cache geometry to its own
routine, so that it can be called from multiple places in upcoming changes.
Call platform_pl310_init() before enabling the controller, and handle the
case where the controller is already enabled.
Add defines for the bits in the PL310 debug control register.
Add a public routine to set the L2 cache ram latencies. This can be
called by platform init routines to fine-tune cache performance.
Enable PL310 power-saving modes and tune the cache ram latencies for imx6.
Diffstat (limited to 'sys/arm/freescale')
-rw-r--r-- | sys/arm/freescale/imx/imx6_pl310.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/sys/arm/freescale/imx/imx6_pl310.c b/sys/arm/freescale/imx/imx6_pl310.c index a4e383e..9e0427f 100644 --- a/sys/arm/freescale/imx/imx6_pl310.c +++ b/sys/arm/freescale/imx/imx6_pl310.c @@ -44,6 +44,19 @@ __FBSDID("$FreeBSD$"); void platform_pl310_init(struct pl310_softc *sc) { + uint32_t reg; + + /* + * Enable power saving modes: + * - Dynamic Gating stops the clock when the controller is idle. + * - Standby stops the clock when the cores are in WFI mode. + */ + reg = pl310_read4(sc, PL310_POWER_CTRL); + reg |= POWER_CTRL_ENABLE_GATING | POWER_CTRL_ENABLE_STANDBY; + pl310_write4(sc, PL310_POWER_CTRL, reg); + + pl310_set_ram_latency(sc, PL310_TAG_RAM_CTRL, 4, 2, 3); + pl310_set_ram_latency(sc, PL310_DATA_RAM_CTRL, 4, 2, 3); } void |