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d9600c99c5
This avoids the irq entry assembly corrupting r5, thereby allowing it to be preserved through to the svc exit code. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
47 lines
825 B
ArmAsm
47 lines
825 B
ArmAsm
#include <asm/assembler.h>
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/*
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* Interrupt handling. Preserves r7, r8, r9
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*/
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.macro arch_irq_handler_default
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get_irqnr_preamble r6, lr
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1: get_irqnr_and_base r0, r2, r6, lr
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movne r1, sp
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@
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@ routine called with r0 = irq number, r1 = struct pt_regs *
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@
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adrne lr, BSYM(1b)
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bne asm_do_IRQ
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#ifdef CONFIG_SMP
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/*
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* XXX
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*
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* this macro assumes that irqstat (r2) and base (r6) are
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* preserved from get_irqnr_and_base above
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*/
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ALT_SMP(test_for_ipi r0, r2, r6, lr)
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ALT_UP_B(9997f)
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movne r1, sp
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adrne lr, BSYM(1b)
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bne do_IPI
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#ifdef CONFIG_LOCAL_TIMERS
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test_for_ltirq r0, r2, r6, lr
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movne r0, sp
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adrne lr, BSYM(1b)
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bne do_local_timer
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#endif
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#endif
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9997:
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.endm
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.macro arch_irq_handler, symbol_name
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.align 5
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.global \symbol_name
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\symbol_name:
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mov r8, lr
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arch_irq_handler_default
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mov pc, r8
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.endm
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