michaelh/zephyr
1
0
Fork 0
Code Releases Activity
zephyr/arch/riscv/include/pmp.h

18 lines
466 B
C
Raw Permalink Normal View History

riscv: pmp: new implementation This is the core code to manage PMP entries with only the global entries initialisation for now. It is not yet linked into the build. Signed-off-by: Nicolas Pitre <npitre@baylibre.com>
2022-04-06 23:03:12 +02:00
/*
* Copyright (c) 2022 BayLibre, SAS
*
* SPDX-License-Identifier: Apache-2.0
*/
#ifndef PMP_H_
#define PMP_H_
void z_riscv_pmp_init(void);
riscv: pmp: new stackguard implementation Stackguard uses the PMP to prevents many types of stack overflow by making any access to the bottom stack area raise a CPU exception. Each thread has its set of precomputed PMP entries and those are written to PMP registers at context switch time. This is the code to set it up. It will be connected later. Signed-off-by: Nicolas Pitre <npitre@baylibre.com>
2022-04-07 00:44:43 +02:00
void z_riscv_pmp_stackguard_prepare(struct k_thread *thread);
void z_riscv_pmp_stackguard_enable(struct k_thread *thread);
riscv: pmp: add new usermode support The idea here is to compute the PMP register set on demand i.e. upon scheduling in the affected threads, and only if changes occurred. A simple sequence number is used to stay in sync with the latest update. Signed-off-by: Nicolas Pitre <npitre@baylibre.com>
2022-04-07 03:30:23 +02:00
void z_riscv_pmp_usermode_init(struct k_thread *thread);
void z_riscv_pmp_usermode_prepare(struct k_thread *thread);
void z_riscv_pmp_usermode_enable(struct k_thread *thread);
riscv: pmp: new implementation This is the core code to manage PMP entries with only the global entries initialisation for now. It is not yet linked into the build. Signed-off-by: Nicolas Pitre <npitre@baylibre.com>
2022-04-06 23:03:12 +02:00
#endif /* PMP_H_ */
Copy permalink