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fix: save and restore callee-saved registers in HwInterruptcontextSwitch for armv7-m like cortex-m3

This commit is contained in:
yuansm 2021-08-31 11:05:51 +08:00
parent fab79b5999
commit bc91fb23ee
2 changed files with 23 additions and 10 deletions
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12
Ubiquitous/XiUOS/arch/arm/armv6m/arm32_switch.c
View File

@ -23,7 +23,6 @@
void __attribute__((naked)) HwInterruptcontextSwitch(x_ubase from, x_ubase to, struct TaskDescriptor *to_task, void *context)
{
// KPrintf("%s\n", __func__);
asm volatile ("PUSH {R4}");
asm volatile ("PUSH {R5}");
@ -44,14 +43,15 @@ void __attribute__((naked)) HwInterruptcontextSwitch(x_ubase from, x_ubase to, s
asm volatile ("STR r5, [r4]");
asm volatile ("LDR r4, =InterruptFromKtask");
asm volatile ("STR r0, [r4]");
asm volatile ("POP {R5}");
asm volatile ("POP {R4}");
asm volatile ("B Arm32SwitchReswitch");
}
void __attribute__((naked)) Arm32SwitchReswitch()
{
// KPrintf("%s\n", __func__);
asm volatile ("PUSH {R4}");
asm volatile ("LDR r4, =InterruptToKtask");
asm volatile ("STR r1, [r4]");
@ -66,13 +66,11 @@ void __attribute__((naked)) Arm32SwitchReswitch()
void __attribute__((naked)) SwitchKtaskContext(x_ubase from, x_ubase to, struct TaskDescriptor *to_task)
{
// KPrintf("%s\n", __func__);
asm volatile("B HwInterruptcontextSwitch");
}
void SwitchKtaskContextTo(x_ubase to, struct TaskDescriptor *to_task)
{
// KPrintf("%s\n", __func__);
asm volatile ("LDR r2, =InterruptToKtask");
asm volatile ("STR r0, [r2]");
asm volatile ("LDR r2, =InterruptToKtaskDescriptor");
@ -109,7 +107,6 @@ void SwitchKtaskContextTo(x_ubase to, struct TaskDescriptor *to_task)
void __attribute__((naked)) HardFaultHandler()
{
// KPrintf("%s\n", __func__);
asm volatile ("MRS r0, msp");
// asm volatile ("TST lr, #0x04");
@ -124,7 +121,6 @@ void __attribute__((naked)) HardFaultHandler()
void __attribute__((naked)) Arm32SwitchGetSpDone()
{
// KPrintf("%s\n", __func__);
asm volatile ("MRS r3, primask");
// asm volatile ("STMFD r0!, {r3 - r11}");
@ -163,14 +159,12 @@ void __attribute__((naked)) Arm32SwitchGetSpDone()
void __attribute__((naked)) Arm32SwitchUpdateMsp()
{
// KPrintf("%s\n", __func__);
asm volatile ("MSR msp, r0");
asm volatile ("B Arm32SwitchUpdateDone");
}
void __attribute__((naked)) Arm32SwitchUpdateDone()
{
// KPrintf("%s\n", __func__);
asm volatile ("PUSH {LR}");
asm volatile ("BL HwHardFaultException");
@ -189,7 +183,6 @@ void __attribute__((naked)) Arm32SwitchUpdateDone()
void __attribute__((naked)) MemFaultHandler()
{
// KPrintf("%s\n", __func__);
asm volatile ("MRS r0, msp");
// asm volatile ("TST lr, #0x04");
@ -204,7 +197,6 @@ void __attribute__((naked)) MemFaultHandler()
void __attribute__((naked)) Arm32Switch1()
{
// KPrintf("%s\n", __func__);
asm volatile ("MRS r3, primask");
// asm volatile ("STMFD r0!, {r3 - r11}");

21
Ubiquitous/XiUOS/arch/arm/armv7m/arm32_switch.c
View File

@ -21,19 +21,37 @@
void __attribute__((naked)) HwInterruptcontextSwitch(x_ubase from, x_ubase to, struct TaskDescriptor *to_task, void *context)
{
asm volatile ("PUSH {R4}");
asm volatile ("PUSH {R5}");
asm volatile ("LDR r4, =KtaskSwitchInterruptFlag");
asm volatile ("LDR r5, [r4]");
asm volatile ("CMP r5, #1");
asm volatile ("POP {R5}");
asm volatile ("POP {R4}");
asm volatile ("BEQ Arm32SwitchReswitch");
asm volatile ("PUSH {R4}");
asm volatile ("PUSH {R5}");
asm volatile ("LDR r4, =KtaskSwitchInterruptFlag");
asm volatile ("MOV r5, #1");
asm volatile ("STR r5, [r4]");
asm volatile ("LDR r4, =InterruptFromKtask");
asm volatile ("STR r0, [r4]");
asm volatile ("POP {R5}");
asm volatile ("POP {R4}");
asm volatile ("B Arm32SwitchReswitch");
}
void __attribute__((naked)) Arm32SwitchReswitch()
{
asm volatile ("PUSH {R4}");
asm volatile ("LDR r4, =InterruptToKtask");
asm volatile ("STR r1, [r4]");
asm volatile ("LDR r4, =InterruptToKtaskDescriptor");
@ -41,6 +59,9 @@ void __attribute__((naked)) Arm32SwitchReswitch()
asm volatile ("LDR r0, =" NVIC_INT_CTRL);
asm volatile ("LDR r1, =" NVIC_PENDSVSET);
asm volatile ("STR r1, [r0]");
asm volatile ("POP {R4}");
asm volatile ("BX LR");
}