diff options
Diffstat (limited to 'arch/arm/mach-stm32mp/include/mach/tzc.h')
| -rw-r--r-- | arch/arm/mach-stm32mp/include/mach/tzc.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/arm/mach-stm32mp/include/mach/tzc.h b/arch/arm/mach-stm32mp/include/mach/tzc.h new file mode 100644 index 0000000..16db55c --- /dev/null +++ b/arch/arm/mach-stm32mp/include/mach/tzc.h @@ -0,0 +1,33 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Simple API for configuring TrustZone memory regions + * + * The premise is that the desired TZC layout is known beforehand, and it can + * be configured in one step. tzc_configure() provides this functionality. + */ +#ifndef MACH_TZC_H +#define MACH_TZC_H + +#include <linux/types.h> + +enum tzc_sec_mode { + TZC_ATTR_SEC_NONE = 0, + TZC_ATTR_SEC_R = 1, + TZC_ATTR_SEC_W = 2, + TZC_ATTR_SEC_RW = 3 +}; + +struct tzc_region { + uintptr_t base; + uintptr_t top; + enum tzc_sec_mode sec_mode; + uint16_t nsec_id; + uint16_t filters_mask; +}; + +int tzc_configure(uintptr_t tzc, const struct tzc_region *cfg); +int tzc_disable_filters(uintptr_t tzc, uint16_t filters_mask); +int tzc_enable_filters(uintptr_t tzc, uint16_t filters_mask); +void tzc_dump_config(uintptr_t tzc); + +#endif /* MACH_TZC_H */ |