lib/physmem.c

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#include <physmem.h>
#include <types.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 - size, align_order);
        if (addr >= pool->start)
                pool->end = 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, align_order);
        if (addr + size <= pool->end)
                pool->start = addr + size;
        else
                addr = PHYSMEM_ALLOC_ERR;

        return addr;
}

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