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fix a bug of uart input problem for gap8

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This commit is contained in:
Wang_Weigen
2021-09-02 10:07:46 +08:00
parent 2fcb4ad3ad
commit b22f9a3851
5 changed files with 76 additions and 86 deletions
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Ubiquitous/XiUOS/arch/risc-v/gap8/boot.S
+11 -20
View File
@@ -40,7 +40,7 @@
****************************************************************************/
/* Exception context size: EPC + 31 common regs + 6 loop regs */
#include "boot.h"
#define EXCEPTION_STACK_SIZE 4*38
/****************************************************************************
@@ -112,7 +112,7 @@
csrrw x0, 0x7B0, x28
csrrw x0, 0x7B1, x29
csrrw x0, 0x7B2, x30
li s0, 0x1890 /* machine mode, UPIE & MPIE enabled */
li s0, 0x1880 /* machine mode, UPIE & MPIE enabled */
csrrw x0, mstatus, s0
lw x3, 3*4(sp) /* gp */
lw x4, 4*4(sp) /* tp */
@@ -149,31 +149,22 @@
lw sp, 2*4(sp) /* restore original sp */
.endm
/* wrapper for IRQ vector */
.macro WRAP_IRQ Routine, IRQn
.macro WRAP_IRQ Routine, IRQn
wrap_irq_\Routine :
SAVE_REGS
csrr s0, mepc
sw s0, 0(sp) /* exception PC */
SAVE_X_REGISTERS
mv fp, sp
li a0, \IRQn /* irq = IRQn */
mv a1, sp /* context = sp */
jal x1, gap8_dispatch_irq
call gap8_dispatch_irq
/* If context switch is needed, return
* a new sp
*/
mv sp, fp
mv a0, fp
call KTaskOsAssignAfterIrq
j SwitchKTaskContextExit
mv sp, a0
lw s0, 0(sp) /* restore ePC */
csrw mepc, s0
RESTORE_REGS
mret
.endm
Ubiquitous/XiUOS/arch/risc-v/gap8/interrupt.c
+48 -59
View File
@@ -121,14 +121,14 @@ static inline void up_ack_irq(int irq)
*
****************************************************************************/
static inline uint32_t _current_privilege(void)
{
uint32_t result;
// static inline uint32_t _current_privilege(void)
// {
// uint32_t result;
asm volatile ("csrr %0, 0xC10" : "=r" (result));
// asm volatile ("csrr %0, 0xC10" : "=r" (result));
return result;
}
// return result;
// }
/****************************************************************************
* Name: up_irq_restore
*
@@ -137,21 +137,21 @@ static inline uint32_t _current_privilege(void)
*
****************************************************************************/
static inline void up_irq_restore(unsigned int pri)
{
if (_current_privilege())
{
/* Machine mode - mstatus */
// static inline void up_irq_restore(unsigned int pri)
// {
// if (_current_privilege())
// {
// /* Machine mode - mstatus */
asm volatile("csrw 0x300, %0" : /* no output */ : "r" (pri));
}
else
{
/* User mode - ustatus */
// asm volatile("csrw 0x300, %0" : /* no output */ : "r" (pri));
// }
// else
// {
// /* User mode - ustatus */
asm volatile("csrw 0x000, %0" : /* no output */ : "r" (pri));
}
}
// asm volatile("csrw 0x000, %0" : /* no output */ : "r" (pri));
// }
// }
/****************************************************************************
* Name: up_irq_save
*
@@ -160,30 +160,30 @@ static inline void up_irq_restore(unsigned int pri)
*
****************************************************************************/
x_base up_irq_save(void)
{
x_base oldstat;
x_base newstat;
// x_base up_irq_save(void)
// {
// x_base oldstat;
// x_base newstat;
if (_current_privilege())
{
/* Machine mode: Unset MIE and UIE */
// if (_current_privilege())
// {
// /* Machine mode: Unset MIE and UIE */
asm volatile ("csrr %0, 0x300": "=r" (oldstat));
newstat = oldstat & ~(0x9);
asm volatile("csrw 0x300, %0" : /* no output */ : "r" (newstat));
}
else
{
/* User mode: Unset UIE */
// asm volatile ("csrr %0, 0x300": "=r" (oldstat));
// newstat = oldstat & ~(0x9);
// asm volatile("csrw 0x300, %0" : /* no output */ : "r" (newstat));
// }
// else
// {
// /* User mode: Unset UIE */
asm volatile ("csrr %0, 0x000": "=r" (oldstat));
newstat = oldstat & ~(1L << 0);
asm volatile("csrw 0x000, %0" : /* no output */ : "r" (newstat));
}
// asm volatile ("csrr %0, 0x000": "=r" (oldstat));
// newstat = oldstat & ~(1L << 0);
// asm volatile("csrw 0x000, %0" : /* no output */ : "r" (newstat));
// }
return oldstat;
}
// return oldstat;
// }
/****************************************************************************
* Name: up_irq_save
*
@@ -265,12 +265,12 @@ void EnableLocalInterrupt(x_base oldstat)
*
****************************************************************************/
// static inline void gap8_sleep_wait_sw_evnt(uint32_t event_mask)
// {
// FCEU->MASK_OR = event_mask;
// __builtin_pulp_event_unit_read((void *)&FCEU->EVENT_WAIT_CLEAR, 0);
// FCEU->MASK_AND = event_mask;
// }
void gap8_sleep_wait_sw_evnt(uint32_t event_mask)
{
FCEU->MASK_OR = event_mask;
// __builtin_pulp_event_unit_read((void *)&FCEU->EVENT_WAIT_CLEAR, 0);
FCEU->MASK_AND = event_mask;
}
/****************************************************************************
* Public Function Prototypes
@@ -334,28 +334,17 @@ void *gap8_dispatch_irq(uint32_t vector, void *current_regs)
/* Clear pending bit and trigger a software event.
* GAP8 would sleep on sw event 3 on up_idle().
*/
FCEU->BUFFER_CLEAR = (1 << vector);
EU_SW_EVNT_TRIG->TRIGGER_SET[3] = 0;
/* Call nuttx kernel, which may change curr_regs, to perform
* a context switch
*/
g_current_regs = current_regs;
// irq_dispatch(vector, current_regs);
isrManager.done->incCounter();
isrManager.done->handleIrq(vector);
isrManager.done->decCounter();
KTaskOsAssignAfterIrq(current_regs);
current_regs = (void *)g_current_regs;
g_current_regs = NONE;
return current_regs;
}