mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-28 15:41:40 +00:00
0b9441ae76
We can remove common.h from most cases of the code here, and only a few places need an additional header instead. Signed-off-by: Tom Rini <trini@konsulko.com> Reviewed-by: Rick Chen <rick@andestech.com>
77 lines
1.6 KiB
C
77 lines
1.6 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 <dm.h>
|
|
#include <regmap.h>
|
|
#include <syscon.h>
|
|
#include <asm/global_data.h>
|
|
#include <asm/io.h>
|
|
#include <asm/smp.h>
|
|
#include <asm/syscon.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(riscv_aclint_timer), &dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (dev_get_driver_data(dev) != 0)
|
|
gd->arch.aclint = dev_read_addr_ptr(dev);
|
|
else
|
|
gd->arch.aclint = syscon_get_first_range(RISCV_SYSCON_ACLINT);
|
|
|
|
if (!gd->arch.aclint)
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int riscv_send_ipi(int hart)
|
|
{
|
|
writel(1, (void __iomem *)MSIP_REG(gd->arch.aclint, hart));
|
|
|
|
return 0;
|
|
}
|
|
|
|
int riscv_clear_ipi(int hart)
|
|
{
|
|
writel(0, (void __iomem *)MSIP_REG(gd->arch.aclint, hart));
|
|
|
|
return 0;
|
|
}
|
|
|
|
int riscv_get_ipi(int hart, int *pending)
|
|
{
|
|
*pending = readl((void __iomem *)MSIP_REG(gd->arch.aclint, hart));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct udevice_id riscv_aclint_swi_ids[] = {
|
|
{ .compatible = "riscv,aclint-mswi", .data = RISCV_SYSCON_ACLINT },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(riscv_aclint_swi) = {
|
|
.name = "riscv_aclint_swi",
|
|
.id = UCLASS_SYSCON,
|
|
.of_match = riscv_aclint_swi_ids,
|
|
.flags = DM_FLAG_PRE_RELOC,
|
|
};
|