diff options
Diffstat (limited to 'arch/arm/cpu/start.c')
| -rw-r--r-- | arch/arm/cpu/start.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/arch/arm/cpu/start.c b/arch/arm/cpu/start.c index 9fd1e8d5f2..a621161884 100644 --- a/arch/arm/cpu/start.c +++ b/arch/arm/cpu/start.c @@ -26,11 +26,18 @@ #include <asm/cache.h> #include <memory.h> +unsigned long arm_stack_top; + static noinline __noreturn void __start(uint32_t membase, uint32_t memsize, uint32_t boarddata) { + unsigned long endmem = membase + memsize; + setup_c(); + arm_stack_top = endmem; + endmem -= STACK_SIZE; /* Stack */ + start_barebox(); } @@ -47,11 +54,20 @@ void __naked __section(.text_entry) start(void) * full SDRAM. The currently running binary can be inside or outside of this * region. TEXT_BASE can be inside or outside of this region. boarddata will * be preserved and can be accessed later with barebox_arm_boarddata(). + * + * -> membase + memsize + * STACK_SIZE - stack + * 16KiB, aligned to 16KiB - First level page table if early MMU support + * is enabled + * -> maximum end of barebox binary + * + * Usually a TEXT_BASE of 1MiB below your lowest possible end of memory should + * be fine. */ void __naked __noreturn barebox_arm_entry(uint32_t membase, uint32_t memsize, uint32_t boarddata) { - arm_setup_stack(STACK_BASE + STACK_SIZE - 16); + arm_setup_stack(membase + memsize - 16); __start(membase, memsize, boarddata); } |