mirror of
https://github.com/zephyrproject-rtos/zephyr
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542a7fa25d
The IRQ handler has had a major changes to manage syscall, reschedule and interrupt from user thread and stack guard. Add userspace support: - Use a global variable to know if the current execution is user or machine. The location of this variable is read only for all user thread and read/write for kernel thread. - Memory shared is supported. - Use dynamic allocation to optimize PMP slot usage. If the area size is a power of 2, only one PMP slot is used, else 2 are used. Add stack guard support: - Use MPRV bit to force PMP rules to machine mode execution. - IRQ stack have a locked stack guard to avoid re-write PMP configuration registers for each interruption and then win some cycle. - The IRQ stack is used as "temporary" stack at the beginning of IRQ handler to save current ESF. That avoid to trigger write fault on thread stack during store ESF which that call IRQ handler to infinity. - A stack guard is also setup for privileged stack of a user thread. Thread: - A PMP setup is specific to each thread. PMP setup are saved in each thread structure to improve reschedule performance. Signed-off-by: Alexandre Mergnat <amergnat@baylibre.com> Reviewed-by: Nicolas Royer <nroyer@baylibre.com>
115 lines
3.4 KiB
C
115 lines
3.4 KiB
C
/*
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* Copyright (c) 2016 Jean-Paul Etienne <fractalclone@gmail.com>
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef ZEPHYR_ARCH_RISCV_INCLUDE_OFFSETS_SHORT_ARCH_H_
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#define ZEPHYR_ARCH_RISCV_INCLUDE_OFFSETS_SHORT_ARCH_H_
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#include <offsets.h>
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/* kernel */
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/* nothing for now */
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/* end - kernel */
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/* threads */
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#define _thread_offset_to_sp \
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(___thread_t_callee_saved_OFFSET + ___callee_saved_t_sp_OFFSET)
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#define _thread_offset_to_s0 \
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(___thread_t_callee_saved_OFFSET + ___callee_saved_t_s0_OFFSET)
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#define _thread_offset_to_s1 \
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(___thread_t_callee_saved_OFFSET + ___callee_saved_t_s1_OFFSET)
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#define _thread_offset_to_s2 \
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(___thread_t_callee_saved_OFFSET + ___callee_saved_t_s2_OFFSET)
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#define _thread_offset_to_s3 \
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(___thread_t_callee_saved_OFFSET + ___callee_saved_t_s3_OFFSET)
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#define _thread_offset_to_s4 \
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(___thread_t_callee_saved_OFFSET + ___callee_saved_t_s4_OFFSET)
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#define _thread_offset_to_s5 \
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(___thread_t_callee_saved_OFFSET + ___callee_saved_t_s5_OFFSET)
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#define _thread_offset_to_s6 \
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(___thread_t_callee_saved_OFFSET + ___callee_saved_t_s6_OFFSET)
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#define _thread_offset_to_s7 \
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(___thread_t_callee_saved_OFFSET + ___callee_saved_t_s7_OFFSET)
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#define _thread_offset_to_s8 \
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(___thread_t_callee_saved_OFFSET + ___callee_saved_t_s8_OFFSET)
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#define _thread_offset_to_s9 \
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(___thread_t_callee_saved_OFFSET + ___callee_saved_t_s9_OFFSET)
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#define _thread_offset_to_s10 \
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(___thread_t_callee_saved_OFFSET + ___callee_saved_t_s10_OFFSET)
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#define _thread_offset_to_s11 \
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(___thread_t_callee_saved_OFFSET + ___callee_saved_t_s11_OFFSET)
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#define _thread_offset_to_swap_return_value \
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(___thread_t_arch_OFFSET + ___thread_arch_t_swap_return_value_OFFSET)
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#if defined(CONFIG_FPU) && defined(CONFIG_FPU_SHARING)
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#define _thread_offset_to_fcsr \
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(___thread_t_callee_saved_OFFSET + ___callee_saved_t_fcsr_OFFSET)
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#define _thread_offset_to_fs0 \
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(___thread_t_callee_saved_OFFSET + ___callee_saved_t_fs0_OFFSET)
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#define _thread_offset_to_fs1 \
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(___thread_t_callee_saved_OFFSET + ___callee_saved_t_fs1_OFFSET)
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#define _thread_offset_to_fs2 \
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(___thread_t_callee_saved_OFFSET + ___callee_saved_t_fs2_OFFSET)
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#define _thread_offset_to_fs3 \
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(___thread_t_callee_saved_OFFSET + ___callee_saved_t_fs3_OFFSET)
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#define _thread_offset_to_fs4 \
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(___thread_t_callee_saved_OFFSET + ___callee_saved_t_fs4_OFFSET)
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#define _thread_offset_to_fs5 \
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(___thread_t_callee_saved_OFFSET + ___callee_saved_t_fs5_OFFSET)
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#define _thread_offset_to_fs6 \
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(___thread_t_callee_saved_OFFSET + ___callee_saved_t_fs6_OFFSET)
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#define _thread_offset_to_fs7 \
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(___thread_t_callee_saved_OFFSET + ___callee_saved_t_fs7_OFFSET)
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#define _thread_offset_to_fs8 \
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(___thread_t_callee_saved_OFFSET + ___callee_saved_t_fs8_OFFSET)
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#define _thread_offset_to_fs9 \
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(___thread_t_callee_saved_OFFSET + ___callee_saved_t_fs9_OFFSET)
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#define _thread_offset_to_fs10 \
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(___thread_t_callee_saved_OFFSET + ___callee_saved_t_fs10_OFFSET)
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#define _thread_offset_to_fs11 \
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(___thread_t_callee_saved_OFFSET + ___callee_saved_t_fs11_OFFSET)
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#endif /* defined(CONFIG_FPU) && defined(CONFIG_FPU_SHARING) */
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#ifdef CONFIG_USERSPACE
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#define _thread_offset_to_priv_stack_start \
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(___thread_t_arch_OFFSET + ___thread_arch_t_priv_stack_start_OFFSET)
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#define _thread_offset_to_user_sp \
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(___thread_t_arch_OFFSET + ___thread_arch_t_user_sp_OFFSET)
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#endif
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/* end - threads */
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#endif /* ZEPHYR_ARCH_RISCV_INCLUDE_OFFSETS_SHORT_ARCH_H_ */
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