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3d23287828
I/O APIC registers are addressed indirectly. Add io_apic_read() and io_apic_write() routines to help register access. Two macros for I/O APIC ID and version register offset are also added. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Acked-by: Simon Glass <sjg@chromium.org>
22 lines
353 B
C
22 lines
353 B
C
/*
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* Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <asm/ioapic.h>
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u32 io_apic_read(u32 reg)
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{
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writel(reg, IO_APIC_INDEX);
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return readl(IO_APIC_DATA);
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}
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void io_apic_write(u32 reg, u32 val)
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{
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writel(reg, IO_APIC_INDEX);
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writel(val, IO_APIC_DATA);
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}
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