void up_addregion(void)
{
#ifndef CONFIG_STM32_CCMEXCLUDE
#if defined(CONFIG_NUTTX_KERNEL) && defined(CONFIG_MM_KERNEL_HEAP)
/* Allow user-mode access to the STM32F20xxx/STM32F40xxx CCM SRAM heap */
stm32_mpu_uheap((uintptr_t)SRAM2_START, SRAM2_END-SRAM2_START);
#endif
/* Add the STM32F20xxx/STM32F40xxx CCM SRAM user heap region. */
kumm_addregion((FAR void*)SRAM2_START, SRAM2_END-SRAM2_START);
#endif
#ifdef CONFIG_STM32_FSMC_SRAM
#if defined(CONFIG_NUTTX_KERNEL) && defined(CONFIG_MM_KERNEL_HEAP)
/* Allow user-mode access to the FSMC SRAM user heap memory */
stm32_mpu_uheap((uintptr_t)CONFIG_HEAP2_BASE, CONFIG_HEAP2_SIZE);
#endif
/* Add the external FSMC SRAM user heap region. */
kumm_addregion((FAR void*)CONFIG_HEAP2_BASE, CONFIG_HEAP2_SIZE);
#endif
}
void up_allocate_heap(FAR void **heap_start, size_t *heap_size)
{
#if defined(CONFIG_BUILD_PROTECTED) && defined(CONFIG_MM_KERNEL_HEAP)
/* Get the unaligned size and position of the user-space heap.
* This heap begins after the user-space .bss section at an offset
* of CONFIG_MM_KERNEL_HEAPSIZE (subject to alignment).
*/
uintptr_t ubase = (uintptr_t)USERSPACE->us_bssend + CONFIG_MM_KERNEL_HEAPSIZE;
size_t usize = SRAM1_END - ubase;
int log2;
DEBUGASSERT(ubase < (uintptr_t)SRAM1_END);
/* Adjust that size to account for MPU alignment requirements.
* NOTE that there is an implicit assumption that the SRAM1_END
* is aligned to the MPU requirement.
*/
log2 = (int)mpu_log2regionfloor(usize);
DEBUGASSERT((SRAM1_END & ((1 << log2) - 1)) == 0);
usize = (1 << log2);
ubase = SRAM1_END - usize;
/* Return the user-space heap settings */
board_led_on(LED_HEAPALLOCATE);
*heap_start = (FAR void*)ubase;
*heap_size = usize;
/* Colorize the heap for debug */
up_heap_color((FAR void*)ubase, usize);
/* Allow user-mode access to the user heap memory */
stm32_mpu_uheap((uintptr_t)ubase, usize);
#else
/* Return the heap settings */
board_led_on(LED_HEAPALLOCATE);
*heap_start = (FAR void*)g_idle_topstack;
*heap_size = SRAM1_END - g_idle_topstack;
/* Colorize the heap for debug */
up_heap_color(*heap_start, *heap_size);
#endif
}
