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lib: utils/timer: Add FDT based ACLINT MTIMER driver

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We add a new FDT based ACLINT MTIMER driver which works for
both CLINT device and standalone ACLINT MTIMER device.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Xiang W <wxjstz@126.com>
This commit is contained in:
Anup Patel
2021-05-20 15:32:46 +05:30
committed by Anup Patel
parent 56fc5f7618
commit 03d6bb51ba
4 changed files with 77 additions and 60 deletions
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4
lib/utils/timer/fdt_timer.c
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@@ -12,10 +12,10 @@
#include <sbi_utils/fdt/fdt_helper.h>
#include <sbi_utils/timer/fdt_timer.h>
extern struct fdt_timer fdt_timer_clint;
extern struct fdt_timer fdt_timer_mtimer;
static struct fdt_timer *timer_drivers[] = {
&fdt_timer_clint
&fdt_timer_mtimer
};
static struct fdt_timer dummy = {

57
lib/utils/timer/fdt_timer_clint.c
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@@ -1,57 +0,0 @@
/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2020 Western Digital Corporation or its affiliates.
*
* Authors:
* Anup Patel <anup.patel@wdc.com>
*/
#include <libfdt.h>
#include <sbi/sbi_error.h>
#include <sbi_utils/fdt/fdt_helper.h>
#include <sbi_utils/timer/fdt_timer.h>
#include <sbi_utils/sys/clint.h>
#define CLINT_TIMER_MAX_NR 16
static unsigned long clint_timer_count = 0;
static struct clint_data clint_timer[CLINT_TIMER_MAX_NR];
static int timer_clint_cold_init(void *fdt, int nodeoff,
const struct fdt_match *match)
{
int rc;
unsigned long ctsize;
struct clint_data *ct, *ctmaster = NULL;
if (CLINT_TIMER_MAX_NR <= clint_timer_count)
return SBI_ENOSPC;
ct = &clint_timer[clint_timer_count++];
if (1 < clint_timer_count)
ctmaster = &clint_timer[0];
rc = fdt_parse_aclint_node(fdt, nodeoff, true, &ct->addr, &ctsize,
&ct->first_hartid, &ct->hart_count);
if (rc)
return rc;
ct->has_64bit_mmio = true;
if (fdt_getprop(fdt, nodeoff, "clint,has-no-64bit-mmio", &rc))
ct->has_64bit_mmio = false;
return clint_cold_timer_init(ct, ctmaster);
}
static const struct fdt_match timer_clint_match[] = {
{ .compatible = "riscv,clint0" },
{ .compatible = "sifive,clint0" },
{ },
};
struct fdt_timer fdt_timer_clint = {
.match_table = timer_clint_match,
.cold_init = timer_clint_cold_init,
.warm_init = clint_warm_timer_init,
.exit = NULL,
};

74
lib/utils/timer/fdt_timer_mtimer.c Normal file
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@@ -0,0 +1,74 @@
/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2021 Western Digital Corporation or its affiliates.
*
* Authors:
* Anup Patel <anup.patel@wdc.com>
*/
#include <libfdt.h>
#include <sbi/sbi_error.h>
#include <sbi_utils/fdt/fdt_helper.h>
#include <sbi_utils/timer/fdt_timer.h>
#include <sbi_utils/timer/aclint_mtimer.h>
#define MTIMER_MAX_NR 16
static unsigned long mtimer_count = 0;
static struct aclint_mtimer_data mtimer[MTIMER_MAX_NR];
static int timer_mtimer_cold_init(void *fdt, int nodeoff,
const struct fdt_match *match)
{
int rc;
unsigned long offset;
struct aclint_mtimer_data *mt, *mtmaster = NULL;
if (MTIMER_MAX_NR <= mtimer_count)
return SBI_ENOSPC;
mt = &mtimer[mtimer_count];
if (0 < mtimer_count)
mtmaster = &mtimer[0];
rc = fdt_parse_aclint_node(fdt, nodeoff, true, &mt->addr, &mt->size,
&mt->first_hartid, &mt->hart_count);
if (rc)
return rc;
mt->has_64bit_mmio = true;
if (match->data) {
/* Adjust MTIMER address and size for CLINT device */
offset = *((unsigned long *)match->data);
mt->addr += offset;
if ((mt->size - offset) < ACLINT_MTIMER_SIZE)
return SBI_EINVAL;
mt->size -= offset;
/* Parse additional CLINT properties */
if (fdt_getprop(fdt, nodeoff, "clint,has-no-64bit-mmio", &rc))
mt->has_64bit_mmio = false;
}
rc = aclint_mtimer_cold_init(mt, mtmaster);
if (rc)
return rc;
mtimer_count++;
return 0;
}
static unsigned long clint_offset = CLINT_MTIMER_OFFSET;
static const struct fdt_match timer_mtimer_match[] = {
{ .compatible = "riscv,clint0", .data = &clint_offset },
{ .compatible = "sifive,clint0", .data = &clint_offset },
{ .compatible = "riscv,aclint-mtimer" },
{ },
};
struct fdt_timer fdt_timer_mtimer = {
.match_table = timer_mtimer_match,
.cold_init = timer_mtimer_cold_init,
.warm_init = aclint_mtimer_warm_init,
.exit = NULL,
};

2
lib/utils/timer/objects.mk
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@@ -9,4 +9,4 @@
libsbiutils-objs-y += timer/aclint_mtimer.o
libsbiutils-objs-y += timer/fdt_timer.o
libsbiutils-objs-y += timer/fdt_timer_clint.o
libsbiutils-objs-y += timer/fdt_timer_mtimer.o