better way to do irqs
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parent
f421cde7f8
commit
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2
Makefile
2
Makefile
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@ -88,7 +88,7 @@ src/isr.o: src/isr.c
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%.dis: %.obj
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$(OBJDUMP) -SD $< > $@
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%.obj: $(LDSCRIPT) %.o #src/interrupt-utils.o
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%.obj: $(LDSCRIPT) %.o src/isr.o
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$(LD) $(LDFLAGS) $(AOBJS) \
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--start-group $(PLATFORM_LIBS) --end-group \
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-Map $*.map $^ -o $@
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8
boot.lds
8
boot.lds
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@ -28,13 +28,13 @@ ENTRY(_start)
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SECTIONS
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{
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. = 0x00400000;
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. = ALIGN(4);
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.text :
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{
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src/start.o (.text)
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src/isr.o (.text)
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*(.text)
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src/start.o (.text)
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*(.irq)
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*(.text)
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}
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. = ALIGN(4);
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@ -4,8 +4,9 @@
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#define reg32(x) (*(volatile uint32_t *)(x))
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//__attribute__ ((interrupt("IRQ")))
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void isr(void)
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__attribute__ ((section (".irq")))
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__attribute__ ((interrupt("IRQ")))
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void irq(void)
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{
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// ISR_ENTRY();
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/* check for TMR0 interrupt */
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19
src/start.S
19
src/start.S
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@ -212,19 +212,12 @@ not_used:
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.align 5
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irq:
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push {lr}
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movs lr,pc
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b isr
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pop {lr}
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subs pc,r14,#4 // suggested irq return cmd
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// STMFD sp!, {r0-r12,lr}
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// MOVNE lr,pc
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// ldr r0, =isr
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// BX r0
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// LDMFD r13!, {r0-r12,r14}
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// MOVS PC, R14
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// subs pc, r14, #4
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//irq:
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// push {lr}
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// movs lr,pc
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// b isr
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// pop {lr}
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// subs pc,r14,#4 // suggested irq return cmd
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fiq:
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.align 5
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