diff options
Diffstat (limited to 'nuttx/arch/arm/src/lpc17xx/lpc17_allocateheap.c')
| -rw-r--r-- | nuttx/arch/arm/src/lpc17xx/lpc17_allocateheap.c | 26 |
1 files changed, 17 insertions, 9 deletions
diff --git a/nuttx/arch/arm/src/lpc17xx/lpc17_allocateheap.c b/nuttx/arch/arm/src/lpc17xx/lpc17_allocateheap.c index f316570f5..047edf5e3 100644 --- a/nuttx/arch/arm/src/lpc17xx/lpc17_allocateheap.c +++ b/nuttx/arch/arm/src/lpc17xx/lpc17_allocateheap.c @@ -198,9 +198,12 @@ void up_allocate_heap(FAR void **heap_start, size_t *heap_size) { #if defined(CONFIG_NUTTX_KERNEL) && defined(CONFIG_MM_KERNEL_HEAP) - /* Get the unaligned size of the user-space 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)g_heapbase + CONFIG_MM_KERNEL_HEAPSIZE; + uintptr_t ubase = (uintptr_t)USERSPACE->us_bssend + CONFIG_MM_KERNEL_HEAPSIZE; size_t usize = CONFIG_DRAM_END - ubase; int log2; @@ -231,8 +234,8 @@ void up_allocate_heap(FAR void **heap_start, size_t *heap_size) /* Return the heap settings */ up_ledon(LED_HEAPALLOCATE); - *heap_start = (FAR void*)g_heapbase; - *heap_size = CONFIG_DRAM_END - g_heapbase; + *heap_start = (FAR void*)g_idle_topstack; + *heap_size = CONFIG_DRAM_END - g_idle_topstack; #endif } @@ -249,9 +252,12 @@ void up_allocate_heap(FAR void **heap_start, size_t *heap_size) #if defined(CONFIG_NUTTX_KERNEL) && defined(CONFIG_MM_KERNEL_HEAP) void up_allocate_kheap(FAR void **heap_start, size_t *heap_size) { - /* Get the unaligned size of the user-space 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)g_heapbase + CONFIG_MM_KERNEL_HEAPSIZE; + uintptr_t ubase = (uintptr_t)USERSPACE->us_bssend + CONFIG_MM_KERNEL_HEAPSIZE; size_t usize = CONFIG_DRAM_END - ubase; int log2; @@ -268,10 +274,12 @@ void up_allocate_kheap(FAR void **heap_start, size_t *heap_size) usize = (1 << log2); ubase = CONFIG_DRAM_END - usize; - /* Return the kernel heap settings */ + /* Return the kernel heap settings (i.e., the part of the heap region + * that was not dedicated to the user heap). + */ - *heap_start = (FAR void*)g_heapbase; - *heap_size = ubase - (uintptr_t)g_heapbase; + *heap_start = (FAR void*)USERSPACE->us_bssend; + *heap_size = ubase - (uintptr_t)USERSPACE->us_bssend; } #endif |