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mm/gran: add gran_alloc_align API

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for arm-v7a, possible region with 4K and need align with 16K.

Signed-off-by: buxiasen <buxiasen@xiaomi.com>
This commit is contained in:
buxiasen
2025-05-09 19:21:31 +08:00
committed by Xiang Xiao
parent 68008aa9d7
commit 1de87953e6
4 changed files with 113 additions and 0 deletions
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47
mm/mm_gran/mm_granalloc.c
View File

@@ -81,4 +81,51 @@ FAR void *gran_alloc(GRAN_HANDLE handle, size_t size)
return (FAR void *)retp;
}
FAR void *gran_alloc_align(GRAN_HANDLE handle, size_t size, size_t align)
{
FAR gran_t *gran = (FAR gran_t *)handle;
uintptr_t retp;
size_t nalign;
size_t ngran;
size_t naligned_up;
int posi;
int ret;
DEBUGASSERT(gran);
nalign = NGRANULE(gran, align);
ngran = NGRANULE(gran, size);
naligned_up = ngran + (nalign - 1);
if (!naligned_up || naligned_up > gran->ngranules)
{
return NULL;
}
ret = gran_enter_critical(gran);
if (ret < 0)
{
return NULL;
}
posi = gran_search(gran, naligned_up);
if (posi >= 0)
{
posi = (posi + nalign - 1) & ~(nalign - 1);
gran_set(gran, posi, ngran);
}
gran_leave_critical(gran);
if (posi < 0)
{
return NULL;
}
retp = gran->heapstart + (posi << gran->log2gran);
graninfo("heap=%"PRIxPTR" posi=%d retp=%"PRIxPTR" size=%zu n=%zu\n",
gran->heapstart, posi, retp, size, ngran);
DEBUGASSERT(retp >= gran->heapstart);
DEBUGASSERT(retp < gran->heapstart + GRANBYTE(gran));
return (FAR void *)retp;
}
#endif /* CONFIG_GRAN */

24
mm/mm_gran/mm_pgalloc.c
View File

@@ -150,6 +150,30 @@ uintptr_t mm_pgalloc(unsigned int npages)
return (uintptr_t)gran_alloc(g_pgalloc, (size_t)npages << MM_PGSHIFT);
}
/****************************************************************************
* Name: mm_pgalloc_align
*
* Description:
* Allocate page memory from the page memory pool.
*
* Input Parameters:
* npages - The number of pages to allocate, each of size CONFIG_MM_PGSIZE.
* align - The number of pages to align, 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_align(unsigned int npages, unsigned int align)
{
size_t alloc_size = (size_t)npages << MM_PGSHIFT;
size_t align_size = (size_t)align << MM_PGSHIFT;
return (uintptr_t)gran_alloc_align(g_pgalloc, alloc_size, align_size);
}
/****************************************************************************
* Name: mm_pgfree
*