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feat: arm64: generic implementation of vector irq (#9336) 

feat: overall implementation of vector irq

This patch generalize the irq handling on up/mp system by adding the
`rt_hw_irq_exit()` & `rt_hw_vector_irq_sched()` API.

Changes:
- Added `rt_hw_irq_exit()` and `rt_hw_vector_irq_sched()` APIs for unified IRQ management.
- Refactored assembly code for both UP and MP systems to use the new IRQ handling flow.
- Removed redundant code and optimized exception handling paths.

Signed-off-by: Shell <smokewood@qq.com>
This commit is contained in:
Shell 2024-08-27 12:45:12 +08:00 committed by GitHub
parent 32635bb53a
commit fd496e4cc4
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
7 changed files with 97 additions and 109 deletions
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8
libcpu/aarch64/common/include/asm-generic.h
View File

@ -23,6 +23,14 @@
.cfi_endproc; \
.size name, .-name;
#define TRACE_SYMBOL(name)
.macro NEVER_RETURN
#ifdef RT_USING_DEBUG
b .
#endif /* RT_USING_DEBUG */
.endm
.macro GET_THREAD_SELF, dst:req
#ifdef ARCH_USING_HW_THREAD_SELF
mrs x0, tpidr_el1

70
libcpu/aarch64/common/include/vector_gcc.h
View File

@ -6,6 +6,7 @@
* Change Logs:
* Date Author Notes
* 2024-03-28 Shell Move vector handling codes from context_gcc.S
* 2024-04-08 Shell Optimizing exception switch between u-space/kernel,
*/
#ifndef __ARM64_INC_VECTOR_H__
@ -45,8 +46,6 @@
mrs x2, elr_el1
stp x2, x3, [sp, #-0x10]!
mov x0, sp /* Move SP into X0 for saving. */
.endm
#ifdef RT_USING_SMP
@ -55,60 +54,29 @@
#include "../up/context_gcc.h"
#endif
.macro RESTORE_IRQ_CONTEXT_WITHOUT_MMU_SWITCH
/* the SP is already ok */
ldp x2, x3, [sp], #0x10 /* SPSR and ELR. */
tst x3, #0x1f
msr spsr_el1, x3
msr elr_el1, x2
ldp x29, x30, [sp], #0x10
msr sp_el0, x29
ldp x28, x29, [sp], #0x10
msr fpcr, x28
msr fpsr, x29
ldp x28, x29, [sp], #0x10
ldp x26, x27, [sp], #0x10
ldp x24, x25, [sp], #0x10
ldp x22, x23, [sp], #0x10
ldp x20, x21, [sp], #0x10
ldp x18, x19, [sp], #0x10
ldp x16, x17, [sp], #0x10
ldp x14, x15, [sp], #0x10
ldp x12, x13, [sp], #0x10
ldp x10, x11, [sp], #0x10
ldp x8, x9, [sp], #0x10
ldp x6, x7, [sp], #0x10
ldp x4, x5, [sp], #0x10
ldp x2, x3, [sp], #0x10
ldp x0, x1, [sp], #0x10
RESTORE_FPU sp
.macro SAVE_USER_CTX, eframex, tmpx
#ifdef RT_USING_SMART
beq arch_ret_to_user
#endif
eret
.endm
.macro SAVE_USER_CTX
mrs x1, spsr_el1
and x1, x1, 0xf
cmp x1, xzr
bne 1f
mrs \tmpx, spsr_el1
and \tmpx, \tmpx, 0xf
cbz \tmpx, 1f
b 2f
1:
mov x0, \eframex
bl lwp_uthread_ctx_save
ldp x0, x1, [sp]
1:
2:
#endif /* RT_USING_SMART */
.endm
.macro RESTORE_USER_CTX, ctx
ldr x1, [\ctx, #CONTEXT_OFFSET_SPSR_EL1]
and x1, x1, 0x1f
cmp x1, xzr
bne 1f
bl lwp_uthread_ctx_restore
.macro RESTORE_USER_CTX, eframex, tmpx
#ifdef RT_USING_SMART
ldr \tmpx, [\eframex, #CONTEXT_OFFSET_SPSR_EL1]
and \tmpx, \tmpx, 0x1f
cbz \tmpx, 1f
b 2f
1:
bl lwp_uthread_ctx_restore
2:
#endif /* RT_USING_SMART */
.endm
#endif /* __ARM64_INC_VECTOR_H__ */

2
libcpu/aarch64/common/mp/context_gcc.S
View File

@ -129,5 +129,7 @@ rt_hw_context_switch_interrupt:
b _context_switch_exit
_context_switch_exit:
.local _context_switch_exit
clrex
RESTORE_CONTEXT_SWITCH

36
libcpu/aarch64/common/mp/vector_gcc.S
View File

@ -12,41 +12,23 @@
#define __ASSEMBLY__
#endif
#include "../include/vector_gcc.h"
#include "vector_gcc.h"
#include "context_gcc.h"
.section .text
.globl vector_fiq
vector_fiq:
.globl vector_fiq
b .
.globl rt_hw_irq_exit
START_POINT(vector_irq)
SAVE_IRQ_CONTEXT
stp x0, x1, [sp, #-0x10]! /* X0 is thread sp */
/**
* void rt_hw_vector_irq_sched(void *eframe)
* @brief do IRQ scheduling
*/
rt_hw_vector_irq_sched:
.globl rt_hw_vector_irq_sched
bl rt_interrupt_enter
ldp x0, x1, [sp]
#ifdef RT_USING_SMART
SAVE_USER_CTX
#endif /* RT_USING_SMART */
bl rt_hw_trap_irq
#ifdef RT_USING_SMART
ldp x0, x1, [sp]
RESTORE_USER_CTX x0
#endif /* RT_USING_SMART */
bl rt_interrupt_leave
ldp x0, x1, [sp], #0x10
bl rt_scheduler_do_irq_switch
rt_hw_irq_exit:
RESTORE_IRQ_CONTEXT
START_POINT_END(vector_irq)
b rt_hw_irq_exit

3
libcpu/aarch64/common/up/context_gcc.S
View File

@ -45,6 +45,7 @@ rt_hw_context_switch_to:
clrex
ldr x0, [x0]
RESTORE_CONTEXT_SWITCH x0
NEVER_RETURN
/*
* void rt_hw_context_switch(rt_ubase_t from, rt_ubase_t to);
@ -62,6 +63,7 @@ rt_hw_context_switch:
ldr x0, [x1] // get new task stack pointer
RESTORE_CONTEXT_SWITCH x0
NEVER_RETURN
.globl rt_thread_switch_interrupt_flag
.globl rt_interrupt_from_thread
@ -115,3 +117,4 @@ rt_hw_context_switch_interrupt_do:
ldr x0, [x4] // get new task's stack pointer
RESTORE_CONTEXT_SWITCH x0
NEVER_RETURN

29
libcpu/aarch64/common/up/vector_gcc.S
View File

@ -22,28 +22,24 @@
.section .text
vector_fiq:
.align 8
.globl vector_fiq
vector_fiq:
SAVE_IRQ_CONTEXT
bl rt_hw_trap_fiq
RESTORE_IRQ_CONTEXT
.globl rt_interrupt_enter
.globl rt_interrupt_leave
.globl rt_thread_switch_interrupt_flag
.globl rt_interrupt_from_thread
.globl rt_interrupt_to_thread
.globl rt_hw_context_switch_interrupt_do
/**
* void rt_hw_vector_irq_sched(void *eframe)
* @brief do IRQ scheduling
*/
rt_hw_vector_irq_sched:
.globl rt_hw_vector_irq_sched
.align 8
.globl vector_irq
vector_irq:
SAVE_IRQ_CONTEXT
bl rt_interrupt_enter
bl rt_hw_trap_irq
bl rt_interrupt_leave
/**
* if rt_thread_switch_interrupt_flag set, jump to
@ -52,12 +48,13 @@ vector_irq:
ldr x1, =rt_thread_switch_interrupt_flag
ldr x2, [x1]
cmp x2, #1
b.ne vector_irq_exit
bne 1f
mov x2, #0 // clear flag
/* clear flag */
mov x2, #0
str x2, [x1]
bl rt_hw_context_switch_interrupt_do
vector_irq_exit:
RESTORE_IRQ_CONTEXT_WITHOUT_MMU_SWITCH
1:
b rt_hw_irq_exit

58
libcpu/aarch64/common/vector_gcc.S
View File

@ -67,32 +67,60 @@ system_vectors:
b vector_serror
#include "include/vector_gcc.h"
#define EFRAMEX x19
START_POINT(vector_exception)
SAVE_IRQ_CONTEXT
stp x0, x1, [sp, #-0x10]!
#ifdef RT_USING_SMART
SAVE_USER_CTX
#endif
mov EFRAMEX, sp
SAVE_USER_CTX EFRAMEX, x0
mov x0, EFRAMEX
bl rt_hw_trap_exception
#ifdef RT_USING_SMART
ldp x0, x1, [sp]
RESTORE_USER_CTX x0
#endif
RESTORE_USER_CTX EFRAMEX, x0
ldp x0, x1, [sp], #0x10
RESTORE_IRQ_CONTEXT_WITHOUT_MMU_SWITCH
RESTORE_IRQ_CONTEXT
START_POINT_END(vector_exception)
START_POINT(vector_serror)
SAVE_IRQ_CONTEXT
mov EFRAMEX, sp
#ifdef RT_USING_SMART
SAVE_USER_CTX
#endif
SAVE_USER_CTX EFRAMEX, x0
stp x0, x1, [sp, #-0x10]!
mov x0, EFRAMEX
bl rt_hw_trap_serror
b .
RESTORE_USER_CTX EFRAMEX, x0
NEVER_RETURN
START_POINT_END(vector_serror)
START_POINT(vector_irq)
SAVE_IRQ_CONTEXT
mov EFRAMEX, sp
/* trace IRQ level */
bl rt_interrupt_enter
SAVE_USER_CTX EFRAMEX, x0
/* handline IRQ */
mov x0, EFRAMEX
bl rt_hw_trap_irq
RESTORE_USER_CTX EFRAMEX, x0
/* restore IRQ level */
bl rt_interrupt_leave
mov x0, EFRAMEX
bl rt_hw_vector_irq_sched
b rt_hw_irq_exit
START_POINT_END(vector_irq)
rt_hw_irq_exit:
.globl rt_hw_irq_exit
RESTORE_IRQ_CONTEXT