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/*
* Copyright (C) 2010, 2013-2014 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/module.h> /* kernel module definitions */
#include <linux/ioport.h> /* request_mem_region */
#include "arch/config.h" /* Configuration for current platform. The symlink for arch is set by Makefile */
#include "ump_osk.h"
#include "ump_kernel_common.h"
#include "ump_kernel_memory_backend_os.h"
#include "ump_kernel_memory_backend_dedicated.h"
/* Configure which dynamic memory allocator to use */
int ump_backend = ARCH_UMP_BACKEND_DEFAULT;
module_param(ump_backend, int, S_IRUGO); /* r--r--r-- */
MODULE_PARM_DESC(ump_backend, "0 = dedicated memory backend (default), 1 = OS memory backend");
/* The base address of the memory block for the dedicated memory backend */
unsigned int ump_memory_address = ARCH_UMP_MEMORY_ADDRESS_DEFAULT;
module_param(ump_memory_address, uint, S_IRUGO); /* r--r--r-- */
MODULE_PARM_DESC(ump_memory_address, "The physical address to map for the dedicated memory backend");
/* The size of the memory block for the dedicated memory backend */
unsigned int ump_memory_size = ARCH_UMP_MEMORY_SIZE_DEFAULT;
module_param(ump_memory_size, uint, S_IRUGO); /* r--r--r-- */
MODULE_PARM_DESC(ump_memory_size, "The size of fixed memory to map in the dedicated memory backend");
ump_memory_backend *ump_memory_backend_create(void)
{
ump_memory_backend *backend = NULL;
/* Create the dynamic memory allocator backend */
if (0 == ump_backend) {
DBG_MSG(2, ("Using dedicated memory backend\n"));
DBG_MSG(2, ("Requesting dedicated memory: 0x%08x, size: %u\n", ump_memory_address, ump_memory_size));
/* Ask the OS if we can use the specified physical memory */
if (NULL == request_mem_region(ump_memory_address, ump_memory_size, "UMP Memory")) {
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));
return NULL;
}
backend = ump_block_allocator_create(ump_memory_address, ump_memory_size);
} else if (1 == ump_backend) {
DBG_MSG(2, ("Using OS memory backend, allocation limit: %d\n", ump_memory_size));
backend = ump_os_memory_backend_create(ump_memory_size);
}
return backend;
}
void ump_memory_backend_destroy(void)
{
if (0 == ump_backend) {
DBG_MSG(2, ("Releasing dedicated memory: 0x%08x\n", ump_memory_address));
release_mem_region(ump_memory_address, ump_memory_size);
}
}
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