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Diffstat (limited to 'driver/product/kernel/drivers/base/ump/example_kernel_api.c')
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diff --git a/driver/product/kernel/drivers/base/ump/example_kernel_api.c b/driver/product/kernel/drivers/base/ump/example_kernel_api.c
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+++ b/driver/product/kernel/drivers/base/ump/example_kernel_api.c
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+/*
+ *
+ * (C) COPYRIGHT 2010-2013 ARM Limited. All rights reserved.
+ *
+ * This program is free software and is provided to you under the terms of the
+ * GNU General Public License version 2 as published by the Free Software
+ * Foundation, and any use by you of this program is subject to the terms
+ * of such GNU licence.
+ *
+ * A copy of the licence is included with the program, and can also be obtained
+ * from Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+
+
+
+
+#include <linux/ump.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+
+/*
+ * Example routine to display information about an UMP allocation
+ * The routine takes an secure_id which can come from a different kernel module
+ * or from a client application (i.e. an ioctl).
+ * It creates a ump handle from the secure id (which validates the secure id)
+ * and if successful dumps the physical memory information.
+ * It follows the API and pins the memory while "using" the physical memory.
+ * Finally it calls the release function to indicate it's finished with the handle.
+ *
+ * If the function can't look up the handle it fails with return value -1.
+ * If the testy succeeds then it return 0.
+ * */
+
+static int display_ump_memory_information(ump_secure_id secure_id)
+{
+ const ump_dd_physical_block_64 * ump_blocks = NULL;
+ ump_dd_handle ump_mem;
+ uint64_t nr_blocks;
+ int i;
+ ump_alloc_flags flags;
+
+ /* get a handle from the secure id */
+ ump_mem = ump_dd_from_secure_id(secure_id);
+
+ if (UMP_DD_INVALID_MEMORY_HANDLE == ump_mem)
+ {
+ /* invalid ID received */
+ return -1;
+ }
+
+ /* at this point we know we've added a reference to the ump allocation, so we must release it with ump_dd_release */
+
+ ump_dd_phys_blocks_get_64(ump_mem, &nr_blocks, &ump_blocks);
+ flags = ump_dd_allocation_flags_get(ump_mem);
+
+ printf("UMP allocation with secure ID %u consists of %zd physical block(s):\n", secure_id, nr_blocks);
+
+ for(i=0; i<nr_blocks; ++i)
+ {
+ printf("\tBlock %d: 0x%08zX size 0x%08zX\n", i, ump_blocks[i].addr, ump_blocks[i].size);
+ }
+
+ printf("and was allocated using the following bitflag combo: 0x%lX\n", flags);
+
+ ump_dd_release(ump_mem);
+
+ return 0;
+}
+