util/physmem.c

Go to the documentation of this file.

#include <physmem.h>
#include <util.h>

phys_addr_t physmem_alloc(struct physmem_pool *pool, phys_size_t size,
                unsigned int align_order)
{
        phys_addr_t     addr;

        addr = round_down(pool->end.addr - size, align_order);
        if (addr >= pool->start.addr)
                pool->end.addr = addr;
        else
                addr = PHYSMEM_ALLOC_ERR;

        return addr;
}

phys_addr_t physmem_alloc_low(struct physmem_pool *pool, phys_size_t size,
                unsigned int align_order)
{
        phys_addr_t     addr;

        addr = round_up(pool->start.addr, align_order);
        if (addr + size <= pool->end.addr)
                pool->start.addr = addr + size;
        else
                addr = PHYSMEM_ALLOC_ERR;

        return addr;
}

---