u-boot/arch/arm/include/asm/arch-sunxi/tzpc.h
Chen-Yu Tsai 92369844ec sunxi: Enable non-secure access to RTC on sun6i (A31s)
On the A31s the RTC is by default secured. Thus when u-boot
loads the kernel in non-secure world, the RTC is unavailable. The
SoC has a TrustZone Protection Controller, which can be used to
enable non-secure access to the RTC.

On the A31 the TZPC doesn't seem to do anything, i.e. changes to
its register contents do not affect access to the RTC.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2015-08-31 08:43:42 +02:00

23 lines
529 B
C

/*
* (C) Copyright 2015 Chen-Yu Tsai <wens@csie.org>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _SUNXI_TZPC_H
#define _SUNXI_TZPC_H
#ifndef __ASSEMBLY__
struct sunxi_tzpc {
u32 r0size; /* 0x00 Size of secure RAM region */
u32 decport0_status; /* 0x04 Status of decode protection port 0 */
u32 decport0_set; /* 0x08 Set decode protection port 0 */
u32 decport0_clear; /* 0x0c Clear decode protection port 0 */
};
#endif
#define SUNXI_TZPC_DECPORT0_RTC (1 << 1)
void tzpc_init(void);
#endif /* _SUNXI_TZPC_H */