int up_addrenv_ustackalloc(FAR struct tcb_s *tcb, size_t stacksize)
{
int ret;
bvdbg("tcb=%p stacksize=%lu\n", tcb, (unsigned long)stacksize);
DEBUGASSERT(tcb);
/* Initialize the address environment list to all zeroes */
memset(tcb->xcp.ustack, 0, ARCH_STACK_NSECTS * sizeof(uintptr_t *));
/* Back the allocation up with physical pages and set up the level 2 mapping
* (which of course does nothing until the L2 page table is hooked into
* the L1 page table).
*/
/* Allocate .text space pages */
ret = arm_addrenv_create_region(tcb->xcp.ustack, ARCH_STACK_NSECTS,
CONFIG_ARCH_STACK_VBASE, stacksize,
MMU_L2_UDATAFLAGS);
if (ret < 0)
{
bdbg("ERROR: Failed to create stack region: %d\n", ret);
up_addrenv_ustackfree(tcb);
return ret;
}
return OK;
}
int up_addrenv_create(size_t textsize, size_t datasize, size_t heapsize,
FAR group_addrenv_t *addrenv)
{
int ret;
binfo("addrenv=%p textsize=%lu datasize=%lu\n",
addrenv, (unsigned long)textsize, (unsigned long)datasize);
DEBUGASSERT(addrenv);
/* Initialize the address environment structure to all zeroes */
memset(addrenv, 0, sizeof(group_addrenv_t));
/* Back the allocation up with physical pages and set up the level 2 mapping
* (which of course does nothing until the L2 page table is hooked into
* the L1 page table).
*/
/* Allocate .text space pages */
ret = arm_addrenv_create_region(addrenv->text, ARCH_TEXT_NSECTS,
CONFIG_ARCH_TEXT_VBASE, textsize,
MMU_L2_UTEXTFLAGS);
if (ret < 0)
{
berr("ERROR: Failed to create .text region: %d\n", ret);
goto errout;
}
/* Allocate .bss/.data space pages. NOTE that a configurable offset is
* added to the allocted size. This is matched by the offset that is
* used when reporting the virtual data address in up_addrenv_vdata().
*/
ret = arm_addrenv_create_region(addrenv->data, ARCH_DATA_NSECTS,
CONFIG_ARCH_DATA_VBASE,
datasize + ARCH_DATA_RESERVE_SIZE,
MMU_L2_UDATAFLAGS);
if (ret < 0)
{
berr("ERROR: Failed to create .bss/.data region: %d\n", ret);
goto errout;
}
#ifdef CONFIG_BUILD_KERNEL
/* Initialize the shared data are at the beginning of the .bss/.data
* region.
*/
ret = up_addrenv_initdata((uintptr_t)addrenv->data[0] & PMD_PTE_PADDR_MASK);
if (ret < 0)
{
berr("ERROR: Failed to initialize .bss/.data region: %d\n", ret);
goto errout;
}
#endif
#ifdef CONFIG_BUILD_KERNEL
/* Allocate heap space pages */
ret = arm_addrenv_create_region(addrenv->heap, ARCH_HEAP_NSECTS,
CONFIG_ARCH_HEAP_VBASE, heapsize,
MMU_L2_UDATAFLAGS);
if (ret < 0)
{
berr("ERROR: Failed to create heap region: %d\n", ret);
goto errout;
}
/* Save the initial heap size allocated. This will be needed when
* the heap data structures are initialized.
*/
addrenv->heapsize = (size_t)ret << MM_PGSHIFT;
#endif
return OK;
errout:
up_addrenv_destroy(addrenv);
return ret;
}
