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https://github.com/AsahiLinux/u-boot
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1cb1611fc6
Add a function to set the ID in the IOAPIC. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
37 lines
784 B
C
37 lines
784 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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#include <asm/lapic.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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void io_apic_set_id(int ioapic_id)
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{
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int bsp_lapicid = lapicid();
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debug("IOAPIC: Initialising IOAPIC at %08x\n", IO_APIC_ADDR);
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debug("IOAPIC: Bootstrap Processor Local APIC = %#02x\n", bsp_lapicid);
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if (ioapic_id) {
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debug("IOAPIC: ID = 0x%02x\n", ioapic_id);
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/* Set IOAPIC ID if it has been specified */
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io_apic_write(0x00, (io_apic_read(0x00) & 0xf0ffffff) |
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(ioapic_id << 24));
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}
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}
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