mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-26 14:40:41 +00:00
61b29b8268
At present devres.h is included in all files that include dm.h but few make use of it. Also this pulls in linux/compat which adds several more headers. Drop the automatic inclusion and require files to include devres themselves. This provides a good indication of which files use devres. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Anatolij Gustschin <agust@denx.de>
94 lines
1.9 KiB
C
94 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* 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 <regmap.h>
|
|
#include <syscon.h>
|
|
#include <asm/io.h>
|
|
#include <asm/syscon.h>
|
|
#include <linux/err.h>
|
|
|
|
/* MSIP registers */
|
|
#define MSIP_REG(base, hart) ((ulong)(base) + (hart) * 4)
|
|
/* mtime compare register */
|
|
#define MTIMECMP_REG(base, hart) ((ulong)(base) + 0x4000 + (hart) * 8)
|
|
/* mtime register */
|
|
#define MTIME_REG(base) ((ulong)(base) + 0xbff8)
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
#define CLINT_BASE_GET(void) \
|
|
do { \
|
|
long *ret; \
|
|
\
|
|
if (!gd->arch.clint) { \
|
|
ret = syscon_get_first_range(RISCV_SYSCON_CLINT); \
|
|
if (IS_ERR(ret)) \
|
|
return PTR_ERR(ret); \
|
|
gd->arch.clint = ret; \
|
|
} \
|
|
} while (0)
|
|
|
|
int riscv_get_time(u64 *time)
|
|
{
|
|
CLINT_BASE_GET();
|
|
|
|
*time = readq((void __iomem *)MTIME_REG(gd->arch.clint));
|
|
|
|
return 0;
|
|
}
|
|
|
|
int riscv_set_timecmp(int hart, u64 cmp)
|
|
{
|
|
CLINT_BASE_GET();
|
|
|
|
writeq(cmp, (void __iomem *)MTIMECMP_REG(gd->arch.clint, hart));
|
|
|
|
return 0;
|
|
}
|
|
|
|
int riscv_send_ipi(int hart)
|
|
{
|
|
CLINT_BASE_GET();
|
|
|
|
writel(1, (void __iomem *)MSIP_REG(gd->arch.clint, hart));
|
|
|
|
return 0;
|
|
}
|
|
|
|
int riscv_clear_ipi(int hart)
|
|
{
|
|
CLINT_BASE_GET();
|
|
|
|
writel(0, (void __iomem *)MSIP_REG(gd->arch.clint, hart));
|
|
|
|
return 0;
|
|
}
|
|
|
|
int riscv_get_ipi(int hart, int *pending)
|
|
{
|
|
CLINT_BASE_GET();
|
|
|
|
*pending = readl((void __iomem *)MSIP_REG(gd->arch.clint, hart));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct udevice_id sifive_clint_ids[] = {
|
|
{ .compatible = "riscv,clint0", .data = RISCV_SYSCON_CLINT },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(sifive_clint) = {
|
|
.name = "sifive_clint",
|
|
.id = UCLASS_SYSCON,
|
|
.of_match = sifive_clint_ids,
|
|
.flags = DM_FLAG_PRE_RELOC,
|
|
};
|