aboutsummaryrefslogtreecommitdiff
path: root/arch/mips/cavium-octeon/executive/cvmx-bootmem.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/mips/cavium-octeon/executive/cvmx-bootmem.c')
-rw-r--r--arch/mips/cavium-octeon/executive/cvmx-bootmem.c586
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 00000000000..4f5a08b37cc
--- /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 */
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-19 21:13:12 +0000