diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/boot.S | 17 | ||||
| -rw-r--r-- | src/cpu/irq.c | 18 | ||||
| -rw-r--r-- | src/sys/schedule.S | 2 | ||||
| -rw-r--r-- | src/sys/schedule.c | 25 |
4 files changed, 37 insertions, 25 deletions
@@ -136,14 +136,25 @@ svc: // TODO: Make supervisor mode return to a specific location // (rather than to a user location) such as the kernel loop cmp r0, #0 - bne 2f + bne 3f cps #0x13 b 1f -2: +3: cmp r0, #2 - bne 1f + bne 2f ldmfd sp!, {r0-r12,lr} b schedule +2: + cmp r0, #3 + bne 1f + ldr r3, =scheduler + ldr r2, [r3, #0] + ldr r1, [r2, #8] // sp_base + cmp r1, #-1 + beq 1f + ldr r3, =stacks_table + mov r0, #0 + strb r0, [r3, r1] 1: ldmfd sp!, {r0-r12,pc}^ io_halt_prefetch: diff --git a/src/cpu/irq.c b/src/cpu/irq.c index 0ddba2b..729a58d 100644 --- a/src/cpu/irq.c +++ b/src/cpu/irq.c @@ -219,11 +219,16 @@ unsigned long c_fiq_handler(void) } } else if (source & (1 << 3)) { c_timer(); - if (counter++ >= 0x10) { + counter++; + if (counter % 0x60 == 0) { + add_thread(localtest, 0, 0); + } else if (counter % 0x6000 == 0) { counter = 0; + } + if (counter % 0x10 == 0) { //uart_scheduler(); return 1; - } + } return 0; } return 0; @@ -231,13 +236,4 @@ unsigned long c_fiq_handler(void) void localtest(void) { - //struct Thread* t = scheduler.rthread_ll->data; - uart_string("Running IRQ Task...\n"); - //uart_scheduler(); - //uart_10(t->data.pid); - //uart_char('\n'); - uart_string("Finished!\n"); - //uart_10(t->data.pid); - //uart_char('\n'); - //sched_info(); } diff --git a/src/sys/schedule.S b/src/sys/schedule.S index a4c07c4..8f8ae52 100644 --- a/src/sys/schedule.S +++ b/src/sys/schedule.S @@ -58,6 +58,8 @@ cleanup: ldr r1, [r0, #0] add r1, #1 str r1, [r0, #0] + // cleanup stack + svc #3 // usrloop -> rthread ldr r2, =usrloopthread str r2, [r3, #0] diff --git a/src/sys/schedule.c b/src/sys/schedule.c index 5b311a9..ea5b465 100644 --- a/src/sys/schedule.c +++ b/src/sys/schedule.c @@ -4,7 +4,6 @@ #include <util/mutex.h> extern void kernel_usr_task_loop(void); -extern void cleanup(void); void init_scheduler(void) { @@ -12,7 +11,7 @@ void init_scheduler(void) usrloopthread.pc = (void*)kernel_usr_task_loop; usrloopthread.sp = (void*)0x5FC8; *(unsigned long**)usrloopthread.sp = (unsigned long*)kernel_usr_task_loop; - usrloopthread.sp_base = (void*)0x6000; + usrloopthread.sp_base = -1; usrloopthread.mptr = 0; usrloopthread.pid = -1; usrloopthread.priority = -1; @@ -35,25 +34,29 @@ void init_scheduler(void) nextpid = SCHED_PID + 1; } -void* get_stack(void) +struct RStack get_stack(void) { + struct RStack r = {.sp = 0, .idx = -1}; for (int i = 0; i < MAX_THREADS; i++) { if (stacks_table[i] == 0) { stacks_table[i] = 1; - return (void*)0x20000000 - STACK_SIZE*i; + r.idx = i; + r.sp = (void*)0x20000000 - STACK_SIZE*i; + return r; } } - return 0; + return r; } void add_thread(void* pc, void* arg, unsigned char priority) { - void* sp = get_stack(); + //void* sp = get_stack(); + struct RStack r = get_stack(); struct Thread* thread = (struct Thread*)malloca(sizeof(struct Thread), 4); thread->pc = pc; - if (sp) { - thread->sp_base = sp; - unsigned long* argp = sp; + if (r.sp) { + thread->sp_base = r.idx; + unsigned long* argp = r.sp; argp -= 1; *argp = (unsigned long)arg; // Set r0 to the argument argp -= 13; @@ -61,8 +64,8 @@ void add_thread(void* pc, void* arg, unsigned char priority) thread->sp = (void*)argp; thread->status = THREAD_READY; } else { - thread->sp_base = 0; - thread->sp = 0; + thread->sp_base = r.idx; + thread->sp = r.sp; thread->status = THREAD_SERROR; } thread->mptr = (void*)0; |