These changes are necessary to make the retention cpuidle state work. This adds support for saving more L2 registers.
Signed-off-by: Amit Daniel Kachhap amit.kachhap@linaro.org --- arch/arm/common/gic.c | 1 - arch/arm/kernel/sr_helpers.h | 2 +- arch/arm/mm/cache-l2x0.c | 10 +++++++++- 3 files changed, 10 insertions(+), 3 deletions(-)
diff --git a/arch/arm/common/gic.c b/arch/arm/common/gic.c index d845b75..124e122 100644 --- a/arch/arm/common/gic.c +++ b/arch/arm/common/gic.c @@ -385,7 +385,6 @@ static void gic_dist_save(unsigned int gic_nr) gic_data[gic_nr].saved_spi_enable[i] = readl_relaxed(dist_base + GIC_DIST_ENABLE_SET + i * 4);
- writel_relaxed(0, dist_base + GIC_DIST_CTRL); }
/* diff --git a/arch/arm/kernel/sr_helpers.h b/arch/arm/kernel/sr_helpers.h index 1ae3a9a..5a30461 100644 --- a/arch/arm/kernel/sr_helpers.h +++ b/arch/arm/kernel/sr_helpers.h @@ -44,7 +44,7 @@ static inline void exit_coherency(void) "mcr p15, 0, %0, c1, c0, 1\n" : "=&r" (v) : "Ir" (0x40) - : ); + : "cc"); } #else static inline void exit_coherency(void) { } diff --git a/arch/arm/mm/cache-l2x0.c b/arch/arm/mm/cache-l2x0.c index 4c99d41..f23696b 100644 --- a/arch/arm/mm/cache-l2x0.c +++ b/arch/arm/mm/cache-l2x0.c @@ -285,7 +285,11 @@ static void l2x0_save_context(void *data, bool dormant, unsigned long end) *l2x0_regs = readl_relaxed(l2x0_base + L2X0_TAG_LATENCY_CTRL); l2x0_regs++; *l2x0_regs = readl_relaxed(l2x0_base + L2X0_DATA_LATENCY_CTRL); - + l2x0_regs++; + *l2x0_regs = readl_relaxed(l2x0_base + L2X0_PREFETCH_CTRL); + l2x0_regs++; + *l2x0_regs = readl_relaxed(l2x0_base + L2X0_POWER_CTRL); + dormant = 0; if (!dormant) { /* clean entire L2 before disabling it*/ writel_relaxed(l2x0_way_mask, l2x0_base + L2X0_CLEAN_WAY); @@ -325,6 +329,10 @@ static void l2x0_restore_context(void *data, bool dormant) writel_relaxed(*l2x0_regs, l2x0_base + L2X0_TAG_LATENCY_CTRL); l2x0_regs++; writel_relaxed(*l2x0_regs, l2x0_base + L2X0_DATA_LATENCY_CTRL); + l2x0_regs++; + writel_relaxed(*l2x0_regs, l2x0_base + L2X0_PREFETCH_CTRL); + l2x0_regs++; + writel_relaxed(*l2x0_regs, l2x0_base + L2X0_POWER_CTRL); /* * If L2 is retained do not invalidate */