Merge branch 'master' into x86/memblock

Conflicts & resolutions:

* arch/x86/xen/setup.c

	dc91c728fd "xen: allow extra memory to be in multiple regions"
	24aa07882b "memblock, x86: Replace memblock_x86_reserve/free..."

	conflicted on xen_add_extra_mem() updates.  The resolution is
	trivial as the latter just want to replace
	memblock_x86_reserve_range() with memblock_reserve().

* drivers/pci/intel-iommu.c

	166e9278a3f "x86/ia64: intel-iommu: move to drivers/iommu/"
	5dfe8660a3d "bootmem: Replace work_with_active_regions() with..."

	conflicted as the former moved the file under drivers/iommu/.
	Resolved by applying the chnages from the latter on the moved
	file.

* mm/Kconfig

	6661672053a "memblock: add NO_BOOTMEM config symbol"
	c378ddd53f9 "memblock, x86: Make ARCH_DISCARD_MEMBLOCK a config option"

	conflicted trivially.  Both added config options.  Just
	letting both add their own options resolves the conflict.

* mm/memblock.c

	d1f0ece6cdc "mm/memblock.c: small function definition fixes"
	ed7b56a799c "memblock: Remove memblock_memory_can_coalesce()"

	confliected.  The former updates function removed by the
	latter.  Resolution is trivial.

Signed-off-by: Tejun Heo <tj@kernel.org>

1 files changed, 257 insertions, 24 deletions

diff --git a/arch/arm/mm/cache-l2x0.c b/arch/arm/mm/cache-l2x0.c
index 44c086710d2..8ac9e9f8479 100644
--- a/arch/arm/mm/cache-l2x0.c
+++ b/arch/arm/mm/cache-l2x0.c
@@ -16,9 +16,12 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
+#include <linux/err.h>
 #include <linux/init.h>
 #include <linux/spinlock.h>
 #include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
 
 #include <asm/cacheflush.h>
 #include <asm/hardware/cache-l2x0.h>
@@ -26,15 +29,23 @@
 #define CACHE_LINE_SIZE		32
 
 static void __iomem *l2x0_base;
-static DEFINE_SPINLOCK(l2x0_lock);
+static DEFINE_RAW_SPINLOCK(l2x0_lock);
 static uint32_t l2x0_way_mask;	/* Bitmask of active ways */
 static uint32_t l2x0_size;
 
+struct l2x0_regs l2x0_saved_regs;
+
+struct l2x0_of_data {
+	void (*setup)(const struct device_node *, __u32 *, __u32 *);
+	void (*save)(void);
+	void (*resume)(void);
+};
+
 static inline void cache_wait_way(void __iomem *reg, unsigned long mask)
 {
 	/* wait for cache operation by line or way to complete */
 	while (readl_relaxed(reg) & mask)
-		;
+		cpu_relax();
 }
 
 #ifdef CONFIG_CACHE_PL310
@@ -115,9 +126,9 @@ static void l2x0_cache_sync(void)
 {
 	unsigned long flags;
 
-	spin_lock_irqsave(&l2x0_lock, flags);
+	raw_spin_lock_irqsave(&l2x0_lock, flags);
 	cache_sync();
-	spin_unlock_irqrestore(&l2x0_lock, flags);
+	raw_spin_unlock_irqrestore(&l2x0_lock, flags);
 }
 
 static void __l2x0_flush_all(void)
@@ -134,9 +145,9 @@ static void l2x0_flush_all(void)
 	unsigned long flags;
 
 	/* clean all ways */
-	spin_lock_irqsave(&l2x0_lock, flags);
+	raw_spin_lock_irqsave(&l2x0_lock, flags);
 	__l2x0_flush_all();
-	spin_unlock_irqrestore(&l2x0_lock, flags);
+	raw_spin_unlock_irqrestore(&l2x0_lock, flags);
 }
 
 static void l2x0_clean_all(void)
@@ -144,11 +155,11 @@ static void l2x0_clean_all(void)
 	unsigned long flags;
 
 	/* clean all ways */
-	spin_lock_irqsave(&l2x0_lock, flags);
+	raw_spin_lock_irqsave(&l2x0_lock, flags);
 	writel_relaxed(l2x0_way_mask, l2x0_base + L2X0_CLEAN_WAY);
 	cache_wait_way(l2x0_base + L2X0_CLEAN_WAY, l2x0_way_mask);
 	cache_sync();
-	spin_unlock_irqrestore(&l2x0_lock, flags);
+	raw_spin_unlock_irqrestore(&l2x0_lock, flags);
 }
 
 static void l2x0_inv_all(void)
@@ -156,13 +167,13 @@ static void l2x0_inv_all(void)
 	unsigned long flags;
 
 	/* invalidate all ways */
-	spin_lock_irqsave(&l2x0_lock, flags);
+	raw_spin_lock_irqsave(&l2x0_lock, flags);
 	/* Invalidating when L2 is enabled is a nono */
 	BUG_ON(readl(l2x0_base + L2X0_CTRL) & 1);
 	writel_relaxed(l2x0_way_mask, l2x0_base + L2X0_INV_WAY);
 	cache_wait_way(l2x0_base + L2X0_INV_WAY, l2x0_way_mask);
 	cache_sync();
-	spin_unlock_irqrestore(&l2x0_lock, flags);
+	raw_spin_unlock_irqrestore(&l2x0_lock, flags);
 }
 
 static void l2x0_inv_range(unsigned long start, unsigned long end)
@@ -170,7 +181,7 @@ static void l2x0_inv_range(unsigned long start, unsigned long end)
 	void __iomem *base = l2x0_base;
 	unsigned long flags;
 
-	spin_lock_irqsave(&l2x0_lock, flags);
+	raw_spin_lock_irqsave(&l2x0_lock, flags);
 	if (start & (CACHE_LINE_SIZE - 1)) {
 		start &= ~(CACHE_LINE_SIZE - 1);
 		debug_writel(0x03);
@@ -195,13 +206,13 @@ static void l2x0_inv_range(unsigned long start, unsigned long end)
 		}
 
 		if (blk_end < end) {
-			spin_unlock_irqrestore(&l2x0_lock, flags);
-			spin_lock_irqsave(&l2x0_lock, flags);
+			raw_spin_unlock_irqrestore(&l2x0_lock, flags);
+			raw_spin_lock_irqsave(&l2x0_lock, flags);
 		}
 	}
 	cache_wait(base + L2X0_INV_LINE_PA, 1);
 	cache_sync();
-	spin_unlock_irqrestore(&l2x0_lock, flags);
+	raw_spin_unlock_irqrestore(&l2x0_lock, flags);
 }
 
 static void l2x0_clean_range(unsigned long start, unsigned long end)
@@ -214,7 +225,7 @@ static void l2x0_clean_range(unsigned long start, unsigned long end)
 		return;
 	}
 
-	spin_lock_irqsave(&l2x0_lock, flags);
+	raw_spin_lock_irqsave(&l2x0_lock, flags);
 	start &= ~(CACHE_LINE_SIZE - 1);
 	while (start < end) {
 		unsigned long blk_end = start + min(end - start, 4096UL);
@@ -225,13 +236,13 @@ static void l2x0_clean_range(unsigned long start, unsigned long end)
 		}
 
 		if (blk_end < end) {
-			spin_unlock_irqrestore(&l2x0_lock, flags);
-			spin_lock_irqsave(&l2x0_lock, flags);
+			raw_spin_unlock_irqrestore(&l2x0_lock, flags);
+			raw_spin_lock_irqsave(&l2x0_lock, flags);
 		}
 	}
 	cache_wait(base + L2X0_CLEAN_LINE_PA, 1);
 	cache_sync();
-	spin_unlock_irqrestore(&l2x0_lock, flags);
+	raw_spin_unlock_irqrestore(&l2x0_lock, flags);
 }
 
 static void l2x0_flush_range(unsigned long start, unsigned long end)
@@ -244,7 +255,7 @@ static void l2x0_flush_range(unsigned long start, unsigned long end)
 		return;
 	}
 
-	spin_lock_irqsave(&l2x0_lock, flags);
+	raw_spin_lock_irqsave(&l2x0_lock, flags);
 	start &= ~(CACHE_LINE_SIZE - 1);
 	while (start < end) {
 		unsigned long blk_end = start + min(end - start, 4096UL);
@@ -257,24 +268,43 @@ static void l2x0_flush_range(unsigned long start, unsigned long end)
 		debug_writel(0x00);
 
 		if (blk_end < end) {
-			spin_unlock_irqrestore(&l2x0_lock, flags);
-			spin_lock_irqsave(&l2x0_lock, flags);
+			raw_spin_unlock_irqrestore(&l2x0_lock, flags);
+			raw_spin_lock_irqsave(&l2x0_lock, flags);
 		}
 	}
 	cache_wait(base + L2X0_CLEAN_INV_LINE_PA, 1);
 	cache_sync();
-	spin_unlock_irqrestore(&l2x0_lock, flags);
+	raw_spin_unlock_irqrestore(&l2x0_lock, flags);
 }
 
 static void l2x0_disable(void)
 {
 	unsigned long flags;
 
-	spin_lock_irqsave(&l2x0_lock, flags);
+	raw_spin_lock_irqsave(&l2x0_lock, flags);
 	__l2x0_flush_all();
 	writel_relaxed(0, l2x0_base + L2X0_CTRL);
 	dsb();
-	spin_unlock_irqrestore(&l2x0_lock, flags);
+	raw_spin_unlock_irqrestore(&l2x0_lock, flags);
+}
+
+static void l2x0_unlock(__u32 cache_id)
+{
+	int lockregs;
+	int i;
+
+	if (cache_id == L2X0_CACHE_ID_PART_L310)
+		lockregs = 8;
+	else
+		/* L210 and unknown types */
+		lockregs = 1;
+
+	for (i = 0; i < lockregs; i++) {
+		writel_relaxed(0x0, l2x0_base + L2X0_LOCKDOWN_WAY_D_BASE +
+			       i * L2X0_LOCKDOWN_STRIDE);
+		writel_relaxed(0x0, l2x0_base + L2X0_LOCKDOWN_WAY_I_BASE +
+			       i * L2X0_LOCKDOWN_STRIDE);
+	}
 }
 
 void __init l2x0_init(void __iomem *base, __u32 aux_val, __u32 aux_mask)
@@ -328,10 +358,14 @@ void __init l2x0_init(void __iomem *base, __u32 aux_val, __u32 aux_mask)
 	 * accessing the below registers will fault.
 	 */
 	if (!(readl_relaxed(l2x0_base + L2X0_CTRL) & 1)) {
+		/* Make sure that I&D is not locked down when starting */
+		l2x0_unlock(cache_id);
 
 		/* l2x0 controller is disabled */
 		writel_relaxed(aux, l2x0_base + L2X0_AUX_CTRL);
 
+		l2x0_saved_regs.aux_ctrl = aux;
+
 		l2x0_inv_all();
 
 		/* enable L2X0 */
@@ -351,3 +385,202 @@ void __init l2x0_init(void __iomem *base, __u32 aux_val, __u32 aux_mask)
 	printk(KERN_INFO "l2x0: %d ways, CACHE_ID 0x%08x, AUX_CTRL 0x%08x, Cache size: %d B\n",
 			ways, cache_id, aux, l2x0_size);
 }
+
+#ifdef CONFIG_OF
+static void __init l2x0_of_setup(const struct device_node *np,
+				 __u32 *aux_val, __u32 *aux_mask)
+{
+	u32 data[2] = { 0, 0 };
+	u32 tag = 0;
+	u32 dirty = 0;
+	u32 val = 0, mask = 0;
+
+	of_property_read_u32(np, "arm,tag-latency", &tag);
+	if (tag) {
+		mask |= L2X0_AUX_CTRL_TAG_LATENCY_MASK;
+		val |= (tag - 1) << L2X0_AUX_CTRL_TAG_LATENCY_SHIFT;
+	}
+
+	of_property_read_u32_array(np, "arm,data-latency",
+				   data, ARRAY_SIZE(data));
+	if (data[0] && data[1]) {
+		mask |= L2X0_AUX_CTRL_DATA_RD_LATENCY_MASK |
+			L2X0_AUX_CTRL_DATA_WR_LATENCY_MASK;
+		val |= ((data[0] - 1) << L2X0_AUX_CTRL_DATA_RD_LATENCY_SHIFT) |
+		       ((data[1] - 1) << L2X0_AUX_CTRL_DATA_WR_LATENCY_SHIFT);
+	}
+
+	of_property_read_u32(np, "arm,dirty-latency", &dirty);
+	if (dirty) {
+		mask |= L2X0_AUX_CTRL_DIRTY_LATENCY_MASK;
+		val |= (dirty - 1) << L2X0_AUX_CTRL_DIRTY_LATENCY_SHIFT;
+	}
+
+	*aux_val &= ~mask;
+	*aux_val |= val;
+	*aux_mask &= ~mask;
+}
+
+static void __init pl310_of_setup(const struct device_node *np,
+				  __u32 *aux_val, __u32 *aux_mask)
+{
+	u32 data[3] = { 0, 0, 0 };
+	u32 tag[3] = { 0, 0, 0 };
+	u32 filter[2] = { 0, 0 };
+
+	of_property_read_u32_array(np, "arm,tag-latency", tag, ARRAY_SIZE(tag));
+	if (tag[0] && tag[1] && tag[2])
+		writel_relaxed(
+			((tag[0] - 1) << L2X0_LATENCY_CTRL_RD_SHIFT) |
+			((tag[1] - 1) << L2X0_LATENCY_CTRL_WR_SHIFT) |
+			((tag[2] - 1) << L2X0_LATENCY_CTRL_SETUP_SHIFT),
+			l2x0_base + L2X0_TAG_LATENCY_CTRL);
+
+	of_property_read_u32_array(np, "arm,data-latency",
+				   data, ARRAY_SIZE(data));
+	if (data[0] && data[1] && data[2])
+		writel_relaxed(
+			((data[0] - 1) << L2X0_LATENCY_CTRL_RD_SHIFT) |
+			((data[1] - 1) << L2X0_LATENCY_CTRL_WR_SHIFT) |
+			((data[2] - 1) << L2X0_LATENCY_CTRL_SETUP_SHIFT),
+			l2x0_base + L2X0_DATA_LATENCY_CTRL);
+
+	of_property_read_u32_array(np, "arm,filter-ranges",
+				   filter, ARRAY_SIZE(filter));
+	if (filter[1]) {
+		writel_relaxed(ALIGN(filter[0] + filter[1], SZ_1M),
+			       l2x0_base + L2X0_ADDR_FILTER_END);
+		writel_relaxed((filter[0] & ~(SZ_1M - 1)) | L2X0_ADDR_FILTER_EN,
+			       l2x0_base + L2X0_ADDR_FILTER_START);
+	}
+}
+
+static void __init pl310_save(void)
+{
+	u32 l2x0_revision = readl_relaxed(l2x0_base + L2X0_CACHE_ID) &
+		L2X0_CACHE_ID_RTL_MASK;
+
+	l2x0_saved_regs.tag_latency = readl_relaxed(l2x0_base +
+		L2X0_TAG_LATENCY_CTRL);
+	l2x0_saved_regs.data_latency = readl_relaxed(l2x0_base +
+		L2X0_DATA_LATENCY_CTRL);
+	l2x0_saved_regs.filter_end = readl_relaxed(l2x0_base +
+		L2X0_ADDR_FILTER_END);
+	l2x0_saved_regs.filter_start = readl_relaxed(l2x0_base +
+		L2X0_ADDR_FILTER_START);
+
+	if (l2x0_revision >= L2X0_CACHE_ID_RTL_R2P0) {
+		/*
+		 * From r2p0, there is Prefetch offset/control register
+		 */
+		l2x0_saved_regs.prefetch_ctrl = readl_relaxed(l2x0_base +
+			L2X0_PREFETCH_CTRL);
+		/*
+		 * From r3p0, there is Power control register
+		 */
+		if (l2x0_revision >= L2X0_CACHE_ID_RTL_R3P0)
+			l2x0_saved_regs.pwr_ctrl = readl_relaxed(l2x0_base +
+				L2X0_POWER_CTRL);
+	}
+}
+
+static void l2x0_resume(void)
+{
+	if (!(readl_relaxed(l2x0_base + L2X0_CTRL) & 1)) {
+		/* restore aux ctrl and enable l2 */
+		l2x0_unlock(readl_relaxed(l2x0_base + L2X0_CACHE_ID));
+
+		writel_relaxed(l2x0_saved_regs.aux_ctrl, l2x0_base +
+			L2X0_AUX_CTRL);
+
+		l2x0_inv_all();
+
+		writel_relaxed(1, l2x0_base + L2X0_CTRL);
+	}
+}
+
+static void pl310_resume(void)
+{
+	u32 l2x0_revision;
+
+	if (!(readl_relaxed(l2x0_base + L2X0_CTRL) & 1)) {
+		/* restore pl310 setup */
+		writel_relaxed(l2x0_saved_regs.tag_latency,
+			l2x0_base + L2X0_TAG_LATENCY_CTRL);
+		writel_relaxed(l2x0_saved_regs.data_latency,
+			l2x0_base + L2X0_DATA_LATENCY_CTRL);
+		writel_relaxed(l2x0_saved_regs.filter_end,
+			l2x0_base + L2X0_ADDR_FILTER_END);
+		writel_relaxed(l2x0_saved_regs.filter_start,
+			l2x0_base + L2X0_ADDR_FILTER_START);
+
+		l2x0_revision = readl_relaxed(l2x0_base + L2X0_CACHE_ID) &
+			L2X0_CACHE_ID_RTL_MASK;
+
+		if (l2x0_revision >= L2X0_CACHE_ID_RTL_R2P0) {
+			writel_relaxed(l2x0_saved_regs.prefetch_ctrl,
+				l2x0_base + L2X0_PREFETCH_CTRL);
+			if (l2x0_revision >= L2X0_CACHE_ID_RTL_R3P0)
+				writel_relaxed(l2x0_saved_regs.pwr_ctrl,
+					l2x0_base + L2X0_POWER_CTRL);
+		}
+	}
+
+	l2x0_resume();
+}
+
+static const struct l2x0_of_data pl310_data = {
+	pl310_of_setup,
+	pl310_save,
+	pl310_resume,
+};
+
+static const struct l2x0_of_data l2x0_data = {
+	l2x0_of_setup,
+	NULL,
+	l2x0_resume,
+};
+
+static const struct of_device_id l2x0_ids[] __initconst = {
+	{ .compatible = "arm,pl310-cache", .data = (void *)&pl310_data },
+	{ .compatible = "arm,l220-cache", .data = (void *)&l2x0_data },
+	{ .compatible = "arm,l210-cache", .data = (void *)&l2x0_data },
+	{}
+};
+
+int __init l2x0_of_init(__u32 aux_val, __u32 aux_mask)
+{
+	struct device_node *np;
+	struct l2x0_of_data *data;
+	struct resource res;
+
+	np = of_find_matching_node(NULL, l2x0_ids);
+	if (!np)
+		return -ENODEV;
+
+	if (of_address_to_resource(np, 0, &res))
+		return -ENODEV;
+
+	l2x0_base = ioremap(res.start, resource_size(&res));
+	if (!l2x0_base)
+		return -ENOMEM;
+
+	l2x0_saved_regs.phy_base = res.start;
+
+	data = of_match_node(l2x0_ids, np)->data;
+
+	/* L2 configuration can only be changed if the cache is disabled */
+	if (!(readl_relaxed(l2x0_base + L2X0_CTRL) & 1)) {
+		if (data->setup)
+			data->setup(np, &aux_val, &aux_mask);
+	}
+
+	if (data->save)
+		data->save();
+
+	l2x0_init(l2x0_base, aux_val, aux_mask);
+
+	outer_cache.resume = data->resume;
+	return 0;
+}
+#endif