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
}
void *
fat_dma_alloc(size_t size)
{
void *rv = NULL;
perf_count(g_dma_perf);
rv = gran_alloc(dma_allocator, size);
if (rv != NULL) {
dma_heap_inuse += size;
if (dma_heap_inuse > dma_heap_peak_use) {
dma_heap_peak_use = dma_heap_inuse;
}
}
return rv;
}
void *
fat_dma_alloc(size_t size)
{
perf_count(g_dma_perf);
return gran_alloc(dma_allocator, size);
}
FAR void *shmat(int shmid, FAR const void *shmaddr, int shmflg)
{
FAR struct shm_region_s *region;
FAR struct task_group_s *group;
FAR struct tcb_s *tcb;
uintptr_t vaddr;
unsigned int npages;
int ret;
/* Get the region associated with the shmid */
DEBUGASSERT(shmid >= 0 && shmid < CONFIG_ARCH_SHM_MAXREGIONS);
region = &g_shminfo.si_region[shmid];
DEBUGASSERT((region->sr_flags & SRFLAG_INUSE) != 0);
/* Get the TCB and group containing our virtual memory allocator */
tcb = sched_self();
DEBUGASSERT(tcb && tcb->group);
group = tcb->group;
DEBUGASSERT(group->tg_shm.gs_handle != NULL &&
group->tg_shm.gs_vaddr[shmid] == 0);
/* Get exclusive access to the region data structure */
ret = sem_wait(®ion->sr_sem);
if (ret < 0)
{
shmdbg("sem_wait failed: %d\n", ret);
goto errout;
}
/* Set aside a virtual address space to span this physical region */
vaddr = (uintptr_t)gran_alloc(group->tg_shm.gs_handle,
region->sr_ds.shm_segsz);
if (vaddr == 0)
{
shmdbg("gran_alloc() failed\n");
ret = -ENOMEM;
goto errout_with_semaphore;
}
/* Convert the region size to pages */
npages = MM_PGALIGNUP(region->sr_ds.shm_segsz);
/* Attach, i.e, map, on shared memory region to the user virtual address. */
ret = up_shmat(region->sr_pages, npages, vaddr);
if (ret < 0)
{
shmdbg("up_shmat() failed\n");
goto errout_with_vaddr;
}
/* Save the virtual address of the region. We will need that in shmat()
* to do the reverse lookup: Give the virtual address of the region to
* detach, we need to get the region table index.
*/
group->tg_shm.gs_vaddr[shmid] = vaddr;
/* Increment the count of processes attached to this region */
region->sr_ds.shm_nattch++;
/* Save the process ID of the the last operation */
region->sr_ds.shm_lpid = tcb->pid;
/* Save the time of the last shmat() */
region->sr_ds.shm_atime = time(NULL);
/* Release our lock on the entry */
sem_post(®ion->sr_sem);
return (FAR void *)vaddr;
errout_with_vaddr:
gran_free(group->tg_shm.gs_handle, (FAR void *)vaddr,
region->sr_ds.shm_segsz);
errout_with_semaphore:
sem_post(®ion->sr_sem);
set_errno(-ret);
errout:
return (FAR void *)ERROR;
}
int up_addrenv_create(size_t envsize, FAR task_addrenv_t *addrenv)
{
FAR struct z180_cbr_s *cbr;
irqstate_t flags;
uintptr_t alloc;
unsigned int npages;
int ret;
/* Convert the size from bytes to numbers of pages */
npages = PHYS_ALIGNUP(envsize);
if (npages < 1)
{
/* No address environment... but I suppose that is not an error */
sdbg("ERROR: npages is zero\n");
return OK;
}
/* Allocate a structure in the common .bss to hold information about the
* task's address environment. NOTE that this is not a part of the TCB,
* but rather a break-away structure that can be shared by the task as
* well as other threads. That is necessary because the life of the
* address of environment might be longer than the life of the task.
*/
flags = irqsave();
cbr = z180_mmu_alloccbr();
if (!cbr)
{
sdbg("ERROR: No free CBR structures\n");
ret = -ENOMEM;
goto errout_with_irq;
}
/* Now allocate the physical memory to back up the address environment */
#ifdef CONFIG_GRAN_SINGLE
alloc = (uintptr_t)gran_alloc(npages);
#else
alloc = (uintptr_t)gran_alloc(g_physhandle, npages);
#endif
if (!alloc)
{
sdbg("ERROR: Failed to allocate %d pages\n", npages);
ret = -ENOMEM;
goto errout_with_cbr;
}
/* Save the information in the CBR structure. Note that alloc is in
* 4KB pages, already in the right form for the CBR.
*/
DEBUGASSERT(alloc <= 0xff);
cbr->cbr = (uint8_t)alloc;
cbr->pages = (uint8_t)npages;
*addrenv = (task_addrenv_t)cbr;
irqrestore(flags);
return OK;
errout_with_cbr:
z180_mmu_freecbr(cbr);
errout_with_irq:
irqrestore(flags);
return ret;
}
void *fat_dma_alloc(size_t size)
{
return gran_alloc(dma_allocator, size);
}
