u-boot/arch/riscv/lib/sifive_clint.c
Simon Glass 401d1c4f5d common: Drop asm/global_data.h from common header
Move this out of the common header and include it only where needed.  In
a number of cases this requires adding "struct udevice;" to avoid adding
another large header or in other cases replacing / adding missing header
files that had been pulled in, very indirectly.   Finally, we have a few
cases where we did not need to include <asm/global_data.h> at all, so
remove that include.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
2021-02-02 15:33:42 -05:00

59 lines
1.2 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2020, Sean Anderson <seanga2@gmail.com>
* Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
*
* U-Boot syscon driver for SiFive's Core Local Interruptor (CLINT).
* The CLINT block holds memory-mapped control and status registers
* associated with software and timer interrupts.
*/
#include <common.h>
#include <dm.h>
#include <asm/global_data.h>
#include <asm/io.h>
#include <asm/smp.h>
#include <linux/err.h>
/* MSIP registers */
#define MSIP_REG(base, hart) ((ulong)(base) + (hart) * 4)
DECLARE_GLOBAL_DATA_PTR;
int riscv_init_ipi(void)
{
int ret;
struct udevice *dev;
ret = uclass_get_device_by_driver(UCLASS_TIMER,
DM_DRIVER_GET(sifive_clint), &dev);
if (ret)
return ret;
gd->arch.clint = dev_read_addr_ptr(dev);
if (!gd->arch.clint)
return -EINVAL;
return 0;
}
int riscv_send_ipi(int hart)
{
writel(1, (void __iomem *)MSIP_REG(gd->arch.clint, hart));
return 0;
}
int riscv_clear_ipi(int hart)
{
writel(0, (void __iomem *)MSIP_REG(gd->arch.clint, hart));
return 0;
}
int riscv_get_ipi(int hart, int *pending)
{
*pending = readl((void __iomem *)MSIP_REG(gd->arch.clint, hart));
return 0;
}