1 /*
2 * Copyright (C) 2010, 2013-2014, 2016-2017 ARM Limited. All rights reserved.
3 *
4 * This program is free software and is provided to you under the terms of the GNU General Public License version 2
5 * as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence.
6 *
7 * A copy of the licence is included with the program, and can also be obtained from Free Software
8 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
9 */
10
11 #include <linux/module.h> /* kernel module definitions */
12 #include <linux/ioport.h> /* request_mem_region */
13
14 #include "arch/config.h" /* Configuration for current platform. The symlink for arch is set by Makefile */
15
16 #include "ump_osk.h"
17 #include "ump_kernel_common.h"
18 #include "ump_kernel_memory_backend_os.h"
19 #include "ump_kernel_memory_backend_dedicated.h"
20
21 /* Configure which dynamic memory allocator to use */
22 int ump_backend = ARCH_UMP_BACKEND_DEFAULT;
23 module_param(ump_backend, int, S_IRUGO); /* r--r--r-- */
24 MODULE_PARM_DESC(ump_backend, "0 = dedicated memory backend (default), 1 = OS memory backend");
25
26 /* The base address of the memory block for the dedicated memory backend */
27 unsigned int ump_memory_address = ARCH_UMP_MEMORY_ADDRESS_DEFAULT;
28 module_param(ump_memory_address, uint, S_IRUGO); /* r--r--r-- */
29 MODULE_PARM_DESC(ump_memory_address, "The physical address to map for the dedicated memory backend");
30
31 /* The size of the memory block for the dedicated memory backend */
32 unsigned int ump_memory_size = ARCH_UMP_MEMORY_SIZE_DEFAULT;
33 module_param(ump_memory_size, uint, S_IRUGO); /* r--r--r-- */
34 MODULE_PARM_DESC(ump_memory_size, "The size of fixed memory to map in the dedicated memory backend");
35
ump_memory_backend_create(void)36 ump_memory_backend *ump_memory_backend_create(void)
37 {
38 ump_memory_backend *backend = NULL;
39
40 /* Create the dynamic memory allocator backend */
41 if (0 == ump_backend) {
42 DBG_MSG(2, ("Using dedicated memory backend\n"));
43
44 DBG_MSG(2, ("Requesting dedicated memory: 0x%08x, size: %u\n", ump_memory_address, ump_memory_size));
45 /* Ask the OS if we can use the specified physical memory */
46 if (NULL == request_mem_region(ump_memory_address, ump_memory_size, "UMP Memory")) {
47 MSG_ERR(("Failed to request memory region (0x%08X - 0x%08X). Is Mali DD already loaded?\n", ump_memory_address, ump_memory_address + ump_memory_size - 1));
48 return NULL;
49 }
50 backend = ump_block_allocator_create(ump_memory_address, ump_memory_size);
51 } else if (1 == ump_backend) {
52 DBG_MSG(2, ("Using OS memory backend, allocation limit: %d\n", ump_memory_size));
53 backend = ump_os_memory_backend_create(ump_memory_size);
54 }
55
56 return backend;
57 }
58
ump_memory_backend_destroy(void)59 void ump_memory_backend_destroy(void)
60 {
61 if (0 == ump_backend) {
62 DBG_MSG(2, ("Releasing dedicated memory: 0x%08x\n", ump_memory_address));
63 release_mem_region(ump_memory_address, ump_memory_size);
64 }
65 }
66