tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Interrupt handling. Preserves r7, r8, r9
3 */
4 .macro arch_irq_handler_default
5 get_irqnr_preamble r5, lr
61: get_irqnr_and_base r0, r6, r5, lr
7 movne r1, sp
8 @
9 @ routine called with r0 = irq number, r1 = struct pt_regs *
10 @
11 adrne lr, BSYM(1b)
12 bne asm_do_IRQ
13
14#ifdef CONFIG_SMP
15 /*
16 * XXX
17 *
18 * this macro assumes that irqstat (r6) and base (r5) are
19 * preserved from get_irqnr_and_base above
20 */
21 ALT_SMP(test_for_ipi r0, r6, r5, lr)
22 ALT_UP_B(9997f)
23 movne r1, sp
24 adrne lr, BSYM(1b)
25 bne do_IPI
26
27#ifdef CONFIG_LOCAL_TIMERS
28 test_for_ltirq r0, r6, r5, lr
29 movne r0, sp
30 adrne lr, BSYM(1b)
31 bne do_local_timer
32#endif
33#endif
349997:
35 .endm
36
37 .macro arch_irq_handler, symbol_name
38 .align 5
39 .global \symbol_name
40\symbol_name:
41 mov r4, lr
42 arch_irq_handler_default
43 mov pc, r4
44 .endm