Esempi in C++ (Cpp) per extmem_malloc_page_align

Esempio n. 1

File: exm_dlmalloc.c Progetto: Scorpio92/mediatek

static int mtk_mspace_mmap_physical(struct exm_info *info, struct vm_area_struct *vma)
{
    unsigned long size = vma->vm_end - vma->vm_start;
    void * va = NULL;

    if ((vma->vm_flags & VM_SHARED) == 0) {
        return -EINVAL;
    }

    vma->vm_ops = &exm_vm_ops;
    va = extmem_malloc_page_align(size);

    if (!va) {
        printk("[EXT_MEM] %s[%d] malloc failed...", __FILE__, __LINE__);
        return -ENOMEM;
    }

    memset(va, 0, size);

    vma->vm_flags |= (VM_DONTCOPY | VM_DONTEXPAND);

    void * pa = (void *)get_phys_from_mspace((unsigned long) va);
    int ret = remap_pfn_range(vma,
    		       vma->vm_start,
    		       (((unsigned long) pa) >> PAGE_SHIFT),
    		       size,
    		       vma->vm_page_prot);
    extmem_printk("[EXT_MEM] pa:0x%x, va:0x%x, vma->vm_pgoff:0x%x, vm_start:0x%x, vm_end:0x%x\n", pa, va, vma->vm_pgoff, vma->vm_start, vma->vm_end);

    return ret;
}

Esempio n. 2

File: exm_dlmalloc.c Progetto: CobraJet93/kernel-3.10.54

static int mtk_mspace_mmap_physical(struct exm_info *info, struct vm_area_struct *vma)
{
    unsigned long size = vma->vm_end - vma->vm_start;
    void * va = NULL;
    unsigned long pa;
    int ret = -EINVAL;

    if ((vma->vm_flags & VM_SHARED) == 0) {
        return -EINVAL;
    }

    vma->vm_ops = &exm_vm_ops;
    va = extmem_malloc_page_align(size);

    if (!va) {
        printk(KERN_ERR "[EXT_MEM] %s failed...\n", __FUNCTION__);
        return -ENOMEM;
    }

    memset(va, 0, size);	
    vma->vm_flags |= (VM_DONTCOPY | VM_DONTEXPAND);

#ifdef CONFIG_ARM64
	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
#else
	vma->vm_page_prot = __pgprot_modify(vma->vm_page_prot, L_PTE_MT_MASK, L_PTE_MT_WRITEBACK);
#endif
    pa = get_phys_from_mspace((unsigned long) va);
    ret = remap_pfn_range(vma,
    		       vma->vm_start,
    		       (pa >> PAGE_SHIFT),
    		       size,
    		       vma->vm_page_prot);
	extmem_printk("[EXT_MEM] pa:%p, va:%p, vma->vm_pgoff:0x%lx, vm_start:0x%lx, vm_end:0x%lx\n", (void *)pa, va, vma->vm_pgoff, vma->vm_start, vma->vm_end);
	if (ret) {
		printk(KERN_ERR "[EXT_MEM] %s fail ret:%d\n", __FUNCTION__, ret);
	}

    return ret;
}