diff options
Diffstat (limited to 'plat/marvell/a8k/common/ble/ble_mem.S')
| -rw-r--r-- | plat/marvell/a8k/common/ble/ble_mem.S | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/plat/marvell/a8k/common/ble/ble_mem.S b/plat/marvell/a8k/common/ble/ble_mem.S new file mode 100644 index 00000000..a48d5463 --- /dev/null +++ b/plat/marvell/a8k/common/ble/ble_mem.S @@ -0,0 +1,30 @@ +/* + * Copyright (C) 2018 Marvell International Ltd. + * + * SPDX-License-Identifier: BSD-3-Clause + * https://spdx.org/licenses + */ + +#include <asm_macros.S> +#include <marvell_def.h> +#include <platform_def.h> + +#define PTE_NON_EXEC_OFF 54 /* XN - eXecute Never bit offset - see VMSAv8-64 */ + + .globl marvell_ble_prepare_exit + +func marvell_ble_prepare_exit + /* + * Read the page table base and set the first page to be executable. + * This is required for jumping to DRAM for further execution. + */ + mrs x0, ttbr0_el3 + ldr x1, [x0] + mov x2, #1 + bic x1, x1, x2, lsl #PTE_NON_EXEC_OFF + str x1, [x0] + tlbi alle3 + dsb sy + isb + ret +endfunc marvell_ble_prepare_exit |