diff options
Diffstat (limited to 'plat/common/aarch64/platform_up_stack.S')
| -rw-r--r-- | plat/common/aarch64/platform_up_stack.S | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/plat/common/aarch64/platform_up_stack.S b/plat/common/aarch64/platform_up_stack.S new file mode 100644 index 0000000..2c87219 --- /dev/null +++ b/plat/common/aarch64/platform_up_stack.S @@ -0,0 +1,50 @@ +/* + * Copyright (c) 2014-2019, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <arch.h> +#include <asm_macros.S> +#include <platform_def.h> + + + .local platform_normal_stacks + .weak plat_set_my_stack + .weak plat_get_my_stack + + /* ----------------------------------------------------- + * uintptr_t plat_get_my_stack () + * + * For cold-boot BL images, only the primary CPU needs a + * stack. This function returns the stack pointer for a + * stack allocated in device memory. + * ----------------------------------------------------- + */ +func plat_get_my_stack + get_up_stack platform_normal_stacks, PLATFORM_STACK_SIZE + ret +endfunc plat_get_my_stack + + /* ----------------------------------------------------- + * void plat_set_my_stack () + * + * For cold-boot BL images, only the primary CPU needs a + * stack. This function sets the stack pointer to a stack + * allocated in normal memory. + * ----------------------------------------------------- + */ +func plat_set_my_stack + get_up_stack platform_normal_stacks, PLATFORM_STACK_SIZE + mov sp, x0 + ret +endfunc plat_set_my_stack + + /* ----------------------------------------------------- + * Single cpu stack in normal memory. + * Used for C code during boot, PLATFORM_STACK_SIZE bytes + * are allocated + * ----------------------------------------------------- + */ +declare_stack platform_normal_stacks, .tzfw_normal_stacks, \ + PLATFORM_STACK_SIZE, 1, CACHE_WRITEBACK_GRANULE |