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
/*
|
|
* Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/io.h>
|
|
#include <asm/ioapic.h>
|
|
|
|
u32 io_apic_read(u32 reg)
|
|
{
|
|
writel(reg, IO_APIC_INDEX);
|
|
return readl(IO_APIC_DATA);
|
|
}
|
|
|
|
void io_apic_write(u32 reg, u32 val)
|
|
{
|
|
writel(reg, IO_APIC_INDEX);
|
|
writel(val, IO_APIC_DATA);
|
|
}
|