diff options
| author | Konstantin Porotchkin <kostap@marvell.com> | 2017-02-22 18:13:00 +0200 |
|---|---|---|
| committer | Kostya Porotchkin <kostap@marvell.com> | 2017-07-12 09:56:31 +0300 |
| commit | e6e201b1417a13a62db40465b4882a0cdb24ccb5 (patch) | |
| tree | 6269795b908e0509bb71b431aa023bf9f9ddd9b9 | |
| parent | aa741212a1414bce695e5173b7bd1a5acf3019c5 (diff) | |
ble: prepare DRAM for running in warm boot mode
The DRAM is marked as non-executable memory segment
in BootROM.
In the Warm Boot mode the control should be passed from
BLE to the ATF that already exists in the DRAM.
This is needed for eliminating the unnecessary boot
image reload from the boot device.
This patch marks the DRAM as an executable memory.
Change-Id: I29a9d4e6a47cd664ce7040c270537690f1f1254e
Signed-off-by: Konstantin Porotchkin <kostap@marvell.com>
Reviewed-on: http://vgitil04.il.marvell.com:8080/40474
Tested-by: iSoC Platform CI <ykjenk@marvell.com>
| -rw-r--r-- | ble/ble.mk | 1 | ||||
| -rw-r--r-- | ble/ble_mem.S | 56 |
2 files changed, 57 insertions, 0 deletions
@@ -35,6 +35,7 @@ BLE_LIBS = $(MV_DDR_LIB) PLAT_MARVELL = plat/marvell BLE_SOURCES += ble/ble_main.c \ + ble/ble_mem.S \ drivers/delay_timer/delay_timer.c \ $(PLAT_MARVELL)/common/plat_delay_timer.c diff --git a/ble/ble_mem.S b/ble/ble_mem.S new file mode 100644 index 00000000..c7d329d0 --- /dev/null +++ b/ble/ble_mem.S @@ -0,0 +1,56 @@ +/* + * *************************************************************************** + * Copyright (C) 2017 Marvell International Ltd. + * *************************************************************************** + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * Neither the name of Marvell nor the names of its contributors may be used + * to endorse or promote products derived from this software without specific + * prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, + * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + * ************************************************************************** + */ +#include <asm_macros.S> +#include <arm_def.h> +#include <platform_def.h> + +#define PTE_NON_EXEC_OFF 54 /* XN - eXecute Never bit offset - see VMSAv8-64 */ + + .globl ble_prepare_exit + +func 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 ble_prepare_exit |