Merge branch 'core/xen' into x86/urgent

1 files changed, 586 insertions, 0 deletions

diff --git a/arch/mips/cavium-octeon/executive/cvmx-bootmem.c b/arch/mips/cavium-octeon/executive/cvmx-bootmem.c
new file mode 100644
index 000000000000..4f5a08b37ccd
--- /dev/null
+++ b/arch/mips/cavium-octeon/executive/cvmx-bootmem.c
@@ -0,0 +1,586 @@
+/***********************license start***************
+ * Author: Cavium Networks
+ *
+ * Contact: support@caviumnetworks.com
+ * This file is part of the OCTEON SDK
+ *
+ * Copyright (c) 2003-2008 Cavium Networks
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, Version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This file is distributed in the hope that it will be useful, but
+ * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
+ * NONINFRINGEMENT.  See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this file; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ * or visit http://www.gnu.org/licenses/.
+ *
+ * This file may also be available under a different license from Cavium.
+ * Contact Cavium Networks for more information
+ ***********************license end**************************************/
+
+/*
+ * Simple allocate only memory allocator.  Used to allocate memory at
+ * application start time.
+ */
+
+#include <linux/kernel.h>
+
+#include <asm/octeon/cvmx.h>
+#include <asm/octeon/cvmx-spinlock.h>
+#include <asm/octeon/cvmx-bootmem.h>
+
+/*#define DEBUG */
+
+
+static struct cvmx_bootmem_desc *cvmx_bootmem_desc;
+
+/* See header file for descriptions of functions */
+
+/*
+ * Wrapper functions are provided for reading/writing the size and
+ * next block values as these may not be directly addressible (in 32
+ * bit applications, for instance.)  Offsets of data elements in
+ * bootmem list, must match cvmx_bootmem_block_header_t.
+ */
+#define NEXT_OFFSET 0
+#define SIZE_OFFSET 8
+
+static void cvmx_bootmem_phy_set_size(uint64_t addr, uint64_t size)
+{
+	cvmx_write64_uint64((addr + SIZE_OFFSET) | (1ull << 63), size);
+}
+
+static void cvmx_bootmem_phy_set_next(uint64_t addr, uint64_t next)
+{
+	cvmx_write64_uint64((addr + NEXT_OFFSET) | (1ull << 63), next);
+}
+
+static uint64_t cvmx_bootmem_phy_get_size(uint64_t addr)
+{
+	return cvmx_read64_uint64((addr + SIZE_OFFSET) | (1ull << 63));
+}
+
+static uint64_t cvmx_bootmem_phy_get_next(uint64_t addr)
+{
+	return cvmx_read64_uint64((addr + NEXT_OFFSET) | (1ull << 63));
+}
+
+void *cvmx_bootmem_alloc_range(uint64_t size, uint64_t alignment,
+			       uint64_t min_addr, uint64_t max_addr)
+{
+	int64_t address;
+	address =
+	    cvmx_bootmem_phy_alloc(size, min_addr, max_addr, alignment, 0);
+
+	if (address > 0)
+		return cvmx_phys_to_ptr(address);
+	else
+		return NULL;
+}
+
+void *cvmx_bootmem_alloc_address(uint64_t size, uint64_t address,
+				 uint64_t alignment)
+{
+	return cvmx_bootmem_alloc_range(size, alignment, address,
+					address + size);
+}
+
+void *cvmx_bootmem_alloc(uint64_t size, uint64_t alignment)
+{
+	return cvmx_bootmem_alloc_range(size, alignment, 0, 0);
+}
+
+int cvmx_bootmem_free_named(char *name)
+{
+	return cvmx_bootmem_phy_named_block_free(name, 0);
+}
+
+struct cvmx_bootmem_named_block_desc *cvmx_bootmem_find_named_block(char *name)
+{
+	return cvmx_bootmem_phy_named_block_find(name, 0);
+}
+
+void cvmx_bootmem_lock(void)
+{
+	cvmx_spinlock_lock((cvmx_spinlock_t *) &(cvmx_bootmem_desc->lock));
+}
+
+void cvmx_bootmem_unlock(void)
+{
+	cvmx_spinlock_unlock((cvmx_spinlock_t *) &(cvmx_bootmem_desc->lock));
+}
+
+int cvmx_bootmem_init(void *mem_desc_ptr)
+{
+	/* Here we set the global pointer to the bootmem descriptor
+	 * block.  This pointer will be used directly, so we will set
+	 * it up to be directly usable by the application.  It is set
+	 * up as follows for the various runtime/ABI combinations:
+	 *
+	 * Linux 64 bit: Set XKPHYS bit
+	 * Linux 32 bit: use mmap to create mapping, use virtual address
+	 * CVMX 64 bit:  use physical address directly
+	 * CVMX 32 bit:  use physical address directly
+	 *
+	 * Note that the CVMX environment assumes the use of 1-1 TLB
+	 * mappings so that the physical addresses can be used
+	 * directly
+	 */
+	if (!cvmx_bootmem_desc) {
+#if   defined(CVMX_ABI_64)
+		/* Set XKPHYS bit */
+		cvmx_bootmem_desc = cvmx_phys_to_ptr(CAST64(mem_desc_ptr));
+#else
+		cvmx_bootmem_desc = (struct cvmx_bootmem_desc *) mem_desc_ptr;
+#endif
+	}
+
+	return 0;
+}
+
+/*
+ * The cvmx_bootmem_phy* functions below return 64 bit physical
+ * addresses, and expose more features that the cvmx_bootmem_functions
+ * above.  These are required for full memory space access in 32 bit
+ * applications, as well as for using some advance features.  Most
+ * applications should not need to use these.
+ */
+
+int64_t cvmx_bootmem_phy_alloc(uint64_t req_size, uint64_t address_min,
+			       uint64_t address_max, uint64_t alignment,
+			       uint32_t flags)
+{
+
+	uint64_t head_addr;
+	uint64_t ent_addr;
+	/* points to previous list entry, NULL current entry is head of list */
+	uint64_t prev_addr = 0;
+	uint64_t new_ent_addr = 0;
+	uint64_t desired_min_addr;
+
+#ifdef DEBUG
+	cvmx_dprintf("cvmx_bootmem_phy_alloc: req_size: 0x%llx, "
+		     "min_addr: 0x%llx, max_addr: 0x%llx, align: 0x%llx\n",
+		     (unsigned long long)req_size,
+		     (unsigned long long)address_min,
+		     (unsigned long long)address_max,
+		     (unsigned long long)alignment);
+#endif
+
+	if (cvmx_bootmem_desc->major_version > 3) {
+		cvmx_dprintf("ERROR: Incompatible bootmem descriptor "
+			     "version: %d.%d at addr: %p\n",
+			     (int)cvmx_bootmem_desc->major_version,
+			     (int)cvmx_bootmem_desc->minor_version,
+			     cvmx_bootmem_desc);
+		goto error_out;
+	}
+
+	/*
+	 * Do a variety of checks to validate the arguments.  The
+	 * allocator code will later assume that these checks have
+	 * been made.  We validate that the requested constraints are
+	 * not self-contradictory before we look through the list of
+	 * available memory.
+	 */
+
+	/* 0 is not a valid req_size for this allocator */
+	if (!req_size)
+		goto error_out;
+
+	/* Round req_size up to mult of minimum alignment bytes */
+	req_size = (req_size + (CVMX_BOOTMEM_ALIGNMENT_SIZE - 1)) &
+		~(CVMX_BOOTMEM_ALIGNMENT_SIZE - 1);
+
+	/*
+	 * Convert !0 address_min and 0 address_max to special case of
+	 * range that specifies an exact memory block to allocate.  Do
+	 * this before other checks and adjustments so that this
+	 * tranformation will be validated.
+	 */
+	if (address_min && !address_max)
+		address_max = address_min + req_size;
+	else if (!address_min && !address_max)
+		address_max = ~0ull;  /* If no limits given, use max limits */
+
+
+	/*
+	 * Enforce minimum alignment (this also keeps the minimum free block
+	 * req_size the same as the alignment req_size.
+	 */
+	if (alignment < CVMX_BOOTMEM_ALIGNMENT_SIZE)
+		alignment = CVMX_BOOTMEM_ALIGNMENT_SIZE;
+
+	/*
+	 * Adjust address minimum based on requested alignment (round
+	 * up to meet alignment).  Do this here so we can reject
+	 * impossible requests up front. (NOP for address_min == 0)
+	 */
+	if (alignment)
+		address_min = __ALIGN_MASK(address_min, (alignment - 1));
+
+	/*
+	 * Reject inconsistent args.  We have adjusted these, so this
+	 * may fail due to our internal changes even if this check
+	 * would pass for the values the user supplied.
+	 */
+	if (req_size > address_max - address_min)
+		goto error_out;
+
+	/* Walk through the list entries - first fit found is returned */
+
+	if (!(flags & CVMX_BOOTMEM_FLAG_NO_LOCKING))
+		cvmx_bootmem_lock();
+	head_addr = cvmx_bootmem_desc->head_addr;
+	ent_addr = head_addr;
+	for (; ent_addr;
+	     prev_addr = ent_addr,
+	     ent_addr = cvmx_bootmem_phy_get_next(ent_addr)) {
+		uint64_t usable_base, usable_max;
+		uint64_t ent_size = cvmx_bootmem_phy_get_size(ent_addr);
+
+		if (cvmx_bootmem_phy_get_next(ent_addr)
+		    && ent_addr > cvmx_bootmem_phy_get_next(ent_addr)) {
+			cvmx_dprintf("Internal bootmem_alloc() error: ent: "
+				"0x%llx, next: 0x%llx\n",
+				(unsigned long long)ent_addr,
+				(unsigned long long)
+				cvmx_bootmem_phy_get_next(ent_addr));
+			goto error_out;
+		}
+
+		/*
+		 * Determine if this is an entry that can satisify the
+		 * request Check to make sure entry is large enough to
+		 * satisfy request.
+		 */
+		usable_base =
+		    __ALIGN_MASK(max(address_min, ent_addr), alignment - 1);
+		usable_max = min(address_max, ent_addr + ent_size);
+		/*
+		 * We should be able to allocate block at address
+		 * usable_base.
+		 */
+
+		desired_min_addr = usable_base;
+		/*
+		 * Determine if request can be satisfied from the
+		 * current entry.
+		 */
+		if (!((ent_addr + ent_size) > usable_base
+				&& ent_addr < address_max
+				&& req_size <= usable_max - usable_base))
+			continue;
+		/*
+		 * We have found an entry that has room to satisfy the
+		 * request, so allocate it from this entry.  If end
+		 * CVMX_BOOTMEM_FLAG_END_ALLOC set, then allocate from
+		 * the end of this block rather than the beginning.
+		 */
+		if (flags & CVMX_BOOTMEM_FLAG_END_ALLOC) {
+			desired_min_addr = usable_max - req_size;
+			/*
+			 * Align desired address down to required
+			 * alignment.
+			 */
+			desired_min_addr &= ~(alignment - 1);
+		}
+
+		/* Match at start of entry */
+		if (desired_min_addr == ent_addr) {
+			if (req_size < ent_size) {
+				/*
+				 * big enough to create a new block
+				 * from top portion of block.
+				 */
+				new_ent_addr = ent_addr + req_size;
+				cvmx_bootmem_phy_set_next(new_ent_addr,
+					cvmx_bootmem_phy_get_next(ent_addr));
+				cvmx_bootmem_phy_set_size(new_ent_addr,
+							ent_size -
+							req_size);
+
+				/*
+				 * Adjust next pointer as following
+				 * code uses this.
+				 */
+				cvmx_bootmem_phy_set_next(ent_addr,
+							new_ent_addr);
+			}
+
+			/*
+			 * adjust prev ptr or head to remove this
+			 * entry from list.
+			 */
+			if (prev_addr)
+				cvmx_bootmem_phy_set_next(prev_addr,
+					cvmx_bootmem_phy_get_next(ent_addr));
+			else
+				/*
+				 * head of list being returned, so
+				 * update head ptr.
+				 */
+				cvmx_bootmem_desc->head_addr =
+					cvmx_bootmem_phy_get_next(ent_addr);
+
+			if (!(flags & CVMX_BOOTMEM_FLAG_NO_LOCKING))
+				cvmx_bootmem_unlock();
+			return desired_min_addr;
+		}
+		/*
+		 * block returned doesn't start at beginning of entry,
+		 * so we know that we will be splitting a block off
+		 * the front of this one.  Create a new block from the
+		 * beginning, add to list, and go to top of loop
+		 * again.
+		 *
+		 * create new block from high portion of
+		 * block, so that top block starts at desired
+		 * addr.
+		 */
+		new_ent_addr = desired_min_addr;
+		cvmx_bootmem_phy_set_next(new_ent_addr,
+					cvmx_bootmem_phy_get_next
+					(ent_addr));
+		cvmx_bootmem_phy_set_size(new_ent_addr,
+					cvmx_bootmem_phy_get_size
+					(ent_addr) -
+					(desired_min_addr -
+						ent_addr));
+		cvmx_bootmem_phy_set_size(ent_addr,
+					desired_min_addr - ent_addr);
+		cvmx_bootmem_phy_set_next(ent_addr, new_ent_addr);
+		/* Loop again to handle actual alloc from new block */
+	}
+error_out:
+	/* We didn't find anything, so return error */
+	if (!(flags & CVMX_BOOTMEM_FLAG_NO_LOCKING))
+		cvmx_bootmem_unlock();
+	return -1;
+}
+
+int __cvmx_bootmem_phy_free(uint64_t phy_addr, uint64_t size, uint32_t flags)
+{
+	uint64_t cur_addr;
+	uint64_t prev_addr = 0;	/* zero is invalid */
+	int retval = 0;
+
+#ifdef DEBUG
+	cvmx_dprintf("__cvmx_bootmem_phy_free addr: 0x%llx, size: 0x%llx\n",
+		     (unsigned long long)phy_addr, (unsigned long long)size);
+#endif
+	if (cvmx_bootmem_desc->major_version > 3) {
+		cvmx_dprintf("ERROR: Incompatible bootmem descriptor "
+			     "version: %d.%d at addr: %p\n",
+			     (int)cvmx_bootmem_desc->major_version,
+			     (int)cvmx_bootmem_desc->minor_version,
+			     cvmx_bootmem_desc);
+		return 0;
+	}
+
+	/* 0 is not a valid size for this allocator */
+	if (!size)
+		return 0;
+
+	if (!(flags & CVMX_BOOTMEM_FLAG_NO_LOCKING))
+		cvmx_bootmem_lock();
+	cur_addr = cvmx_bootmem_desc->head_addr;
+	if (cur_addr == 0 || phy_addr < cur_addr) {
+		/* add at front of list - special case with changing head ptr */
+		if (cur_addr && phy_addr + size > cur_addr)
+			goto bootmem_free_done;	/* error, overlapping section */
+		else if (phy_addr + size == cur_addr) {
+			/* Add to front of existing first block */
+			cvmx_bootmem_phy_set_next(phy_addr,
+						  cvmx_bootmem_phy_get_next
+						  (cur_addr));
+			cvmx_bootmem_phy_set_size(phy_addr,
+						  cvmx_bootmem_phy_get_size
+						  (cur_addr) + size);
+			cvmx_bootmem_desc->head_addr = phy_addr;
+
+		} else {
+			/* New block before first block.  OK if cur_addr is 0 */
+			cvmx_bootmem_phy_set_next(phy_addr, cur_addr);
+			cvmx_bootmem_phy_set_size(phy_addr, size);
+			cvmx_bootmem_desc->head_addr = phy_addr;
+		}
+		retval = 1;
+		goto bootmem_free_done;
+	}
+
+	/* Find place in list to add block */
+	while (cur_addr && phy_addr > cur_addr) {
+		prev_addr = cur_addr;
+		cur_addr = cvmx_bootmem_phy_get_next(cur_addr);
+	}
+
+	if (!cur_addr) {
+		/*
+		 * We have reached the end of the list, add on to end,
+		 * checking to see if we need to combine with last
+		 * block
+		 */
+		if (prev_addr + cvmx_bootmem_phy_get_size(prev_addr) ==
+		    phy_addr) {
+			cvmx_bootmem_phy_set_size(prev_addr,
+						  cvmx_bootmem_phy_get_size
+						  (prev_addr) + size);
+		} else {
+			cvmx_bootmem_phy_set_next(prev_addr, phy_addr);
+			cvmx_bootmem_phy_set_size(phy_addr, size);
+			cvmx_bootmem_phy_set_next(phy_addr, 0);
+		}
+		retval = 1;
+		goto bootmem_free_done;
+	} else {
+		/*
+		 * insert between prev and cur nodes, checking for
+		 * merge with either/both.
+		 */
+		if (prev_addr + cvmx_bootmem_phy_get_size(prev_addr) ==
+		    phy_addr) {
+			/* Merge with previous */
+			cvmx_bootmem_phy_set_size(prev_addr,
+						  cvmx_bootmem_phy_get_size
+						  (prev_addr) + size);
+			if (phy_addr + size == cur_addr) {
+				/* Also merge with current */
+				cvmx_bootmem_phy_set_size(prev_addr,
+					cvmx_bootmem_phy_get_size(cur_addr) +
+					cvmx_bootmem_phy_get_size(prev_addr));
+				cvmx_bootmem_phy_set_next(prev_addr,
+					cvmx_bootmem_phy_get_next(cur_addr));
+			}
+			retval = 1;
+			goto bootmem_free_done;
+		} else if (phy_addr + size == cur_addr) {
+			/* Merge with current */
+			cvmx_bootmem_phy_set_size(phy_addr,
+						  cvmx_bootmem_phy_get_size
+						  (cur_addr) + size);
+			cvmx_bootmem_phy_set_next(phy_addr,
+						  cvmx_bootmem_phy_get_next
+						  (cur_addr));
+			cvmx_bootmem_phy_set_next(prev_addr, phy_addr);
+			retval = 1;
+			goto bootmem_free_done;
+		}
+
+		/* It is a standalone block, add in between prev and cur */
+		cvmx_bootmem_phy_set_size(phy_addr, size);
+		cvmx_bootmem_phy_set_next(phy_addr, cur_addr);
+		cvmx_bootmem_phy_set_next(prev_addr, phy_addr);
+
+	}
+	retval = 1;
+
+bootmem_free_done:
+	if (!(flags & CVMX_BOOTMEM_FLAG_NO_LOCKING))
+		cvmx_bootmem_unlock();
+	return retval;
+
+}
+
+struct cvmx_bootmem_named_block_desc *
+	cvmx_bootmem_phy_named_block_find(char *name, uint32_t flags)
+{
+	unsigned int i;
+	struct cvmx_bootmem_named_block_desc *named_block_array_ptr;
+
+#ifdef DEBUG
+	cvmx_dprintf("cvmx_bootmem_phy_named_block_find: %s\n", name);
+#endif
+	/*
+	 * Lock the structure to make sure that it is not being
+	 * changed while we are examining it.
+	 */
+	if (!(flags & CVMX_BOOTMEM_FLAG_NO_LOCKING))
+		cvmx_bootmem_lock();
+
+	/* Use XKPHYS for 64 bit linux */
+	named_block_array_ptr = (struct cvmx_bootmem_named_block_desc *)
+	    cvmx_phys_to_ptr(cvmx_bootmem_desc->named_block_array_addr);
+
+#ifdef DEBUG
+	cvmx_dprintf
+	    ("cvmx_bootmem_phy_named_block_find: named_block_array_ptr: %p\n",
+	     named_block_array_ptr);
+#endif
+	if (cvmx_bootmem_desc->major_version == 3) {
+		for (i = 0;
+		     i < cvmx_bootmem_desc->named_block_num_blocks; i++) {
+			if ((name && named_block_array_ptr[i].size
+			     && !strncmp(name, named_block_array_ptr[i].name,
+					 cvmx_bootmem_desc->named_block_name_len
+					 - 1))
+			    || (!name && !named_block_array_ptr[i].size)) {
+				if (!(flags & CVMX_BOOTMEM_FLAG_NO_LOCKING))
+					cvmx_bootmem_unlock();
+
+				return &(named_block_array_ptr[i]);
+			}
+		}
+	} else {
+		cvmx_dprintf("ERROR: Incompatible bootmem descriptor "
+			     "version: %d.%d at addr: %p\n",
+			     (int)cvmx_bootmem_desc->major_version,
+			     (int)cvmx_bootmem_desc->minor_version,
+			     cvmx_bootmem_desc);
+	}
+	if (!(flags & CVMX_BOOTMEM_FLAG_NO_LOCKING))
+		cvmx_bootmem_unlock();
+
+	return NULL;
+}
+
+int cvmx_bootmem_phy_named_block_free(char *name, uint32_t flags)
+{
+	struct cvmx_bootmem_named_block_desc *named_block_ptr;
+
+	if (cvmx_bootmem_desc->major_version != 3) {
+		cvmx_dprintf("ERROR: Incompatible bootmem descriptor version: "
+			     "%d.%d at addr: %p\n",
+			     (int)cvmx_bootmem_desc->major_version,
+			     (int)cvmx_bootmem_desc->minor_version,
+			     cvmx_bootmem_desc);
+		return 0;
+	}
+#ifdef DEBUG
+	cvmx_dprintf("cvmx_bootmem_phy_named_block_free: %s\n", name);
+#endif
+
+	/*
+	 * Take lock here, as name lookup/block free/name free need to
+	 * be atomic.
+	 */
+	cvmx_bootmem_lock();
+
+	named_block_ptr =
+	    cvmx_bootmem_phy_named_block_find(name,
+					      CVMX_BOOTMEM_FLAG_NO_LOCKING);
+	if (named_block_ptr) {
+#ifdef DEBUG
+		cvmx_dprintf("cvmx_bootmem_phy_named_block_free: "
+			     "%s, base: 0x%llx, size: 0x%llx\n",
+			     name,
+			     (unsigned long long)named_block_ptr->base_addr,
+			     (unsigned long long)named_block_ptr->size);
+#endif
+		__cvmx_bootmem_phy_free(named_block_ptr->base_addr,
+					named_block_ptr->size,
+					CVMX_BOOTMEM_FLAG_NO_LOCKING);
+		named_block_ptr->size = 0;
+		/* Set size to zero to indicate block not used. */
+	}
+
+	cvmx_bootmem_unlock();
+	return named_block_ptr != NULL;	/* 0 on failure, 1 on success */
+}