irq: Allow boards to define the return type of irq_save()
The AVR wants a uint8_t return type for irq_save(), but other architectures will generally prefer int. Allow the board to configure the size of the flag by introducing an irqstatus_t typedef. Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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@ -143,7 +143,7 @@ gpio_out_setup(uint8_t pin, uint8_t val)
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if (! regs)
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goto fail;
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uint8_t bit = GPIO2BIT(pin);
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uint8_t flag = irq_save();
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irqstatus_t flag = irq_save();
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regs->out = val ? (regs->out | bit) : (regs->out & ~bit);
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regs->mode |= bit;
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irq_restore(flag);
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@ -160,7 +160,7 @@ void gpio_out_toggle(struct gpio_out g)
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void
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gpio_out_write(struct gpio_out g, uint8_t val)
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{
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uint8_t flag = irq_save();
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irqstatus_t flag = irq_save();
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g.regs->out = val ? (g.regs->out | g.bit) : (g.regs->out & ~g.bit);
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irq_restore(flag);
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}
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@ -174,7 +174,7 @@ gpio_in_setup(uint8_t pin, int8_t pull_up)
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if (! regs)
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goto fail;
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uint8_t bit = GPIO2BIT(pin);
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uint8_t flag = irq_save();
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irqstatus_t flag = irq_save();
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regs->out = pull_up > 0 ? (regs->out | bit) : (regs->out & ~bit);
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regs->mode &= ~bit;
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irq_restore(flag);
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@ -196,7 +196,7 @@ gpio_pwm_write(struct gpio_pwm g, uint8_t val)
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if (g.size8) {
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*(volatile uint8_t*)g.reg = val;
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} else {
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uint8_t flag = irq_save();
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irqstatus_t flag = irq_save();
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*(volatile uint16_t*)g.reg = val;
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irq_restore(flag);
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}
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@ -210,7 +210,7 @@ gpio_pwm_setup(uint8_t pin, uint32_t cycle_time, uint8_t val)
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if (READP(pwm_pins[chan]) != pin)
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continue;
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const struct gpio_pwm_info *p = &pwm_regs[chan];
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uint8_t flags = READP(p->flags), cs;
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irqstatus_t flags = READP(p->flags), cs;
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if (flags & GP_AFMT) {
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switch (cycle_time) {
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case 0 ... 8*510L - 1: cs = 1; break;
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@ -240,7 +240,7 @@ gpio_pwm_setup(uint8_t pin, uint32_t cycle_time, uint8_t val)
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shutdown("Can not user timer1 for PWM; timer1 is used for timers");
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// Setup PWM timer
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uint8_t flag = irq_save();
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irqstatus_t flag = irq_save();
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uint8_t old_cs = *regb & 0x07;
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if (old_cs && old_cs != cs)
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shutdown("PWM already programmed at different speed");
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@ -15,13 +15,15 @@ static inline void irq_enable(void) {
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sei();
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}
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static inline uint8_t irq_save(void) {
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typedef uint8_t irqstatus_t;
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static inline irqstatus_t irq_save(void) {
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uint8_t flag = SREG;
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irq_disable();
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return flag;
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}
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static inline void irq_restore(uint8_t flag) {
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static inline void irq_restore(irqstatus_t flag) {
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barrier();
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SREG = flag;
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}
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@ -89,7 +89,7 @@ console_pop_input(uint8_t len)
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, needcopy - copied);
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copied = needcopy;
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}
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uint8_t flag = irq_save();
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irqstatus_t flag = irq_save();
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if (rpos != readb(&receive_pos)) {
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// Raced with irq handler - retry
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irq_restore(flag);
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@ -52,7 +52,7 @@ timer_init(void)
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{
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if (CONFIG_AVR_CLKPR != -1 && (uint8_t)CONFIG_AVR_CLKPR != CLKPR) {
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// Program the clock prescaler
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uint8_t flag = irq_save();
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irqstatus_t flag = irq_save();
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CLKPR = 0x80;
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CLKPR = CONFIG_AVR_CLKPR;
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irq_restore(flag);
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@ -100,7 +100,7 @@ timer_periodic(void)
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uint32_t
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timer_read_time(void)
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{
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uint8_t flag = irq_save();
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irqstatus_t flag = irq_save();
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uint16_t cur = timer_get();
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uint32_t last = timer_last;
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irq_restore(flag);
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@ -30,7 +30,7 @@ move_free(struct move *m)
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struct move *
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move_alloc(void)
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{
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uint8_t flag = irq_save();
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irqstatus_t flag = irq_save();
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struct move *m = move_free_list;
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if (!m)
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shutdown("Move queue empty");
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@ -231,7 +231,7 @@ void
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command_debug_read16(uint32_t *args)
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{
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uint16_t *ptr = (void*)(size_t)args[0];
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uint8_t flag = irq_save();
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irqstatus_t flag = irq_save();
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uint16_t v = *ptr;
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irq_restore(flag);
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sendf("debug_result val=%hu", v);
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@ -251,7 +251,7 @@ void
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command_debug_write16(uint32_t *args)
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{
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uint16_t *ptr = (void*)(size_t)args[0];
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uint8_t flag = irq_save();
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irqstatus_t flag = irq_save();
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*ptr = args[1];
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irq_restore(flag);
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}
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@ -3,9 +3,11 @@
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#include <stdint.h>
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typedef unsigned long irqstatus_t;
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void irq_disable(void);
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void irq_enable(void);
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uint8_t irq_save(void);
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void irq_restore(uint8_t flag);
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irqstatus_t irq_save(void);
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void irq_restore(irqstatus_t flag);
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#endif // irq.h
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@ -43,7 +43,7 @@ uint8_t
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sched_check_periodic(uint16_t time, uint16_t *pnext)
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{
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uint16_t next = *pnext, cur;
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uint8_t flag = irq_save();
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irqstatus_t flag = irq_save();
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cur = millis;
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irq_restore(flag);
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if ((int16_t)(cur - next) < 0)
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@ -82,7 +82,7 @@ void
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sched_timer(struct timer *add)
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{
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uint32_t waketime = add->waketime;
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uint8_t flag = irq_save();
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irqstatus_t flag = irq_save();
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if (sched_is_before(waketime, timer_list->waketime)) {
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// This timer is the next - insert at front of list and reschedule
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add->next = timer_list;
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@ -105,7 +105,7 @@ sched_timer(struct timer *add)
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void
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sched_del_timer(struct timer *del)
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{
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uint8_t flag = irq_save();
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irqstatus_t flag = irq_save();
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if (timer_list == del) {
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// Deleting the next active timer - delete and reschedule
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timer_list = del->next;
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@ -16,28 +16,32 @@
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* Interrupts
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****************************************************************/
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uint8_t Interrupt_off;
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irqstatus_t Interrupt_off;
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void irq_disable(void)
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void
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irq_disable(void)
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{
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Interrupt_off = 1;
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barrier();
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}
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void irq_enable(void)
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void
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irq_enable(void)
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{
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barrier();
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Interrupt_off = 0;
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}
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uint8_t irq_save(void)
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irqstatus_t
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irq_save(void)
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{
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uint8_t flag = Interrupt_off;
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irqstatus_t flag = Interrupt_off;
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irq_disable();
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return flag;
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}
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void irq_restore(uint8_t flag)
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void
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irq_restore(irqstatus_t flag)
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{
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barrier();
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Interrupt_off = flag;
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