/*
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* Copyright (C) 2010, 2013-2014, 2016-2017 ARM Limited. All rights reserved.
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*
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* This program is free software and is provided to you under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence.
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*
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* A copy of the licence is included with the program, and can also be obtained from Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include <linux/module.h> /* kernel module definitions */
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#include <linux/ioport.h> /* request_mem_region */
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#include "arch/config.h" /* Configuration for current platform. The symlink for arch is set by Makefile */
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#include "ump_osk.h"
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#include "ump_kernel_common.h"
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#include "ump_kernel_memory_backend_os.h"
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#include "ump_kernel_memory_backend_dedicated.h"
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/* Configure which dynamic memory allocator to use */
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int ump_backend = ARCH_UMP_BACKEND_DEFAULT;
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module_param(ump_backend, int, S_IRUGO); /* r--r--r-- */
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MODULE_PARM_DESC(ump_backend, "0 = dedicated memory backend (default), 1 = OS memory backend");
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/* The base address of the memory block for the dedicated memory backend */
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unsigned int ump_memory_address = ARCH_UMP_MEMORY_ADDRESS_DEFAULT;
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module_param(ump_memory_address, uint, S_IRUGO); /* r--r--r-- */
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MODULE_PARM_DESC(ump_memory_address, "The physical address to map for the dedicated memory backend");
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/* The size of the memory block for the dedicated memory backend */
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unsigned int ump_memory_size = ARCH_UMP_MEMORY_SIZE_DEFAULT;
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module_param(ump_memory_size, uint, S_IRUGO); /* r--r--r-- */
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MODULE_PARM_DESC(ump_memory_size, "The size of fixed memory to map in the dedicated memory backend");
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ump_memory_backend *ump_memory_backend_create(void)
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{
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ump_memory_backend *backend = NULL;
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/* Create the dynamic memory allocator backend */
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if (0 == ump_backend) {
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DBG_MSG(2, ("Using dedicated memory backend\n"));
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DBG_MSG(2, ("Requesting dedicated memory: 0x%08x, size: %u\n", ump_memory_address, ump_memory_size));
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/* Ask the OS if we can use the specified physical memory */
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if (NULL == request_mem_region(ump_memory_address, ump_memory_size, "UMP Memory")) {
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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));
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return NULL;
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}
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backend = ump_block_allocator_create(ump_memory_address, ump_memory_size);
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} else if (1 == ump_backend) {
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DBG_MSG(2, ("Using OS memory backend, allocation limit: %d\n", ump_memory_size));
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backend = ump_os_memory_backend_create(ump_memory_size);
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}
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return backend;
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}
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void ump_memory_backend_destroy(void)
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{
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if (0 == ump_backend) {
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DBG_MSG(2, ("Releasing dedicated memory: 0x%08x\n", ump_memory_address));
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release_mem_region(ump_memory_address, ump_memory_size);
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}
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}
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