| /* |
| * Copyright (C) 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/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); |
| } |
| } |