123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221 |
- /****************************************************************************
- * mm/mm_gran/mm_pgalloc.c
- *
- * Copyright (C) 2014 Gregory Nutt. All rights reserved.
- * Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * 3. Neither the name NuttX nor the names of its contributors may be
- * used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- ****************************************************************************/
- /****************************************************************************
- * Included Files
- ****************************************************************************/
- #include <nuttx/config.h>
- #include <assert.h>
- #include <nuttx/mm/gran.h>
- #include <nuttx/pgalloc.h>
- #include "mm_gran/mm_gran.h"
- #ifdef CONFIG_MM_PGALLOC
- /****************************************************************************
- * Pre-processor Definitions
- ****************************************************************************/
- /* Configuration ************************************************************/
- /* CONFIG_MM_PGALLOC - Enable page allocator support
- * CONFIG_MM_PGSIZE - The page size. Must be one of {1024, 2048,
- * 4096, 8192, or 16384}. This is easily extensible, but only those
- * values are currently support.
- * CONFIG_DEBUG_PGALLOC - Just like CONFIG_DEBUG_MM, but only generates
- * output from the page allocation logic.
- *
- * Dependencies: CONFIG_ARCH_USE_MMU and CONFIG_GRAN
- */
- /* Debug */
- #ifdef CONFIG_CPP_HAVE_VARARGS
- # ifdef CONFIG_DEBUG_PGALLOC
- # define pgaerr(format, ...) _err(format, ##__VA_ARGS__)
- # define pgawarn(format, ...) _warn(format, ##__VA_ARGS__)
- # define pgainfo(format, ...) _info(format, ##__VA_ARGS__)
- # else
- # define pgaerr(format, ...) merr(format, ##__VA_ARGS__)
- # define pgawarn(format, ...) mwarn(format, ##__VA_ARGS__)
- # define pgainfo(format, ...) minfo(format, ##__VA_ARGS__)
- # endif
- #else
- # ifdef CONFIG_DEBUG_PGALLOC
- # define pgaerr _err
- # define pgawarn _warn
- # define pgainfo _info
- # else
- # define pgaerr merr
- # define pgawarn mwarn
- # define pgainfo minfo
- # endif
- #endif
- /****************************************************************************
- * Private Data
- ****************************************************************************/
- #ifndef CONFIG_GRAN_SINGLE
- /* The state of the page allocator */
- static GRAN_HANDLE g_pgalloc;
- #endif
- /****************************************************************************
- * Private Functions
- ****************************************************************************/
- /****************************************************************************
- * Public Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: mm_pginitialize
- *
- * Description:
- * Initialize the page allocator.
- *
- * Input Parameters:
- * heap_start - The physical address of the start of memory region that
- * will be used for the page allocator heap
- * heap_size - The size (in bytes) of the memory region that will be used
- * for the page allocator heap.
- *
- * Returned Value:
- * None
- *
- ****************************************************************************/
- void mm_pginitialize(FAR void *heap_start, size_t heap_size)
- {
- #ifdef CONFIG_GRAN_SINGLE
- int ret;
- ret = gran_initialize(heap_start, heap_size, MM_PGSHIFT, MM_PGSHIFT);
- DEBUGASSERT(ret == OK);
- UNUSED(ret);
- #else
- g_pgalloc = gran_initialize(heap_start, heap_size, MM_PGSHIFT, MM_PGSHIFT);
- DEBUGASSERT(pg_alloc != NULL);
- #endif
- }
- /****************************************************************************
- * Name: mm_pgreserve
- *
- * Description:
- * Reserve memory in the page memory pool. This will reserve the pages
- * that contain the start and end addresses plus all of the pages
- * in between. This should be done early in the initialization sequence
- * before any other allocations are made.
- *
- * Reserved memory can never be allocated (it can be freed however which
- * essentially unreserves the memory).
- *
- * Input Parameters:
- * start - The address of the beginning of the region to be reserved.
- * size - The size of the region to be reserved
- *
- * Returned Value:
- * None
- *
- ****************************************************************************/
- void mm_pgreserve(uintptr_t start, size_t size)
- {
- #ifdef CONFIG_GRAN_SINGLE
- gran_reserve(start, size);
- #else
- gran_reserve(g_pgalloc, start, size);
- #endif
- }
- /****************************************************************************
- * Name: mm_pgalloc
- *
- * Description:
- * Allocate page memory from the page memory pool.
- *
- * Input Parameters:
- * npages - The number of pages to allocate, each of size CONFIG_MM_PGSIZE.
- *
- * Returned Value:
- * On success, a non-zero, physical address of the allocated page memory
- * is returned. Zero is returned on failure. NOTE: This is an unmapped
- * physical address and cannot be used until it is appropriately mapped.
- *
- ****************************************************************************/
- uintptr_t mm_pgalloc(unsigned int npages)
- {
- #ifdef CONFIG_GRAN_SINGLE
- return (uintptr_t)gran_alloc((size_t)1 << MM_PGSHIFT);
- #else
- return (uintptr_t)gran_alloc(g_pgalloc, (size_t)1 << MM_PGSHIFT);
- #endif
- }
- /****************************************************************************
- * Name: mm_pgfree
- *
- * Description:
- * Return page memory to the page memory pool.
- *
- * Input Parameters:
- * paddr - A physical address to a page in the page memory pool previously
- * allocated by mm_pgalloc.
- * npages - The number of contiguous pages to be return to the page memory
- * pool, beginning with the page at paddr;
- *
- * Returned Value:
- * None
- *
- ****************************************************************************/
- void mm_pgfree(uintptr_t paddr, unsigned int npages)
- {
- #ifdef CONFIG_GRAN_SINGLE
- gran_free((FAR void *)paddr, (size_t)npages << MM_PGSHIFT);
- #else
- gran_free(g_pgalloc, (FAR void *)paddr, (size_t)npages << MM_PGSHIFT);
- #endif
- }
- #endif /* CONFIG_MM_PGALLOC */
|