fb7bdf0df4
This commit add require code for supporting RX architecture to Zephyr, it include: - Add require config and CMakelists for RX arch - Intialization startup code for RX - Interrupt and exception handling - Thread creation adn thread context switch - irq offload using SW interrupt Signed-off-by: Duy Nguyen <duy.nguyen.xa@renesas.com>
40 lines
1.3 KiB
ArmAsm
40 lines
1.3 KiB
ArmAsm
/*
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* Copyright (c) 2024 Renesas Electronics Corporation
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr/toolchain.h>
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.list
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.section .text
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GTEXT(_z_rx_irq_exit)
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_z_rx_irq_exit:
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mov #__kernel, r1 ; Load the base address of _kernel into r1
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mov r1, r3 ; Load the base address of _kernel into r1
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add #___cpu_t_current_OFFSET, r1 ; Add the offset for the 'current' field to r1
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mov [r1], r2 ; Load the value of _kernel.cpus[0].current into r2
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push r2 ; Save old_thread to the stack
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; Get the next thread to schedule
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mov #0,r1 ; Use r1 to pass NULL since we haven't saved the context yet
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bsr _z_get_next_switch_handle ; Call the function
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; The return value of z_get_next_switch_handle will now be in r1
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; Restore old_thread from the stack
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pop r2 ; Restore old_thread from the stack
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; Check if a switch is necessary
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cmp #0, r1
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bz no_switch ; If new_thread (in r1) is NULL, jump to no_switch
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add #___thread_t_switch_handle_OFFSET, r2
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; Call arch_switch to perform the context switch
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bsr _z_rx_arch_switch ; r1: new_thread->switch_handle, r2: old_thread->switch_handle
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no_switch:
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rts
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