platform: Replace CLINT library usage with ACLINT library

The ACLINT devices are backward compatible with SiFive CLINT
so we replace all CLINT library usage in various platforms
with ACLINT library. As a result of this replacement, the
CLINT library is not used by any part of OpenSBI hence we
remove it.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Xiang W <wxjstz@126.com>

2 files changed, 0 insertions, 257 deletions

diff --git a/lib/utils/sys/clint.c b/lib/utils/sys/clint.c
deleted file mode 100644
index e8c2bd9..0000000
--- a/lib/utils/sys/clint.c
+++ /dev/null
@@ -1,256 +0,0 @@
-/*
- * SPDX-License-Identifier: BSD-2-Clause
- *
- * Copyright (c) 2019 Western Digital Corporation or its affiliates.
- *
- * Authors:
- *   Anup Patel <anup.patel@wdc.com>
- */
-
-#include <sbi/riscv_asm.h>
-#include <sbi/riscv_atomic.h>
-#include <sbi/riscv_io.h>
-#include <sbi/sbi_domain.h>
-#include <sbi/sbi_error.h>
-#include <sbi/sbi_hartmask.h>
-#include <sbi/sbi_ipi.h>
-#include <sbi/sbi_timer.h>
-#include <sbi_utils/sys/clint.h>
-
-#define CLINT_IPI_OFF		0
-#define CLINT_IPI_SIZE		0x4000
-
-#define CLINT_TIME_CMP_OFF	0x4000
-#define CLINT_TIME_CMP_SIZE	0x4000
-
-#define CLINT_TIME_VAL_OFF	0xbff8
-#define CLINT_TIME_VAL_SIZE	0x4000
-
-static struct clint_data *clint_ipi_hartid2data[SBI_HARTMASK_MAX_BITS];
-
-static void clint_ipi_send(u32 target_hart)
-{
-	struct clint_data *clint;
-
-	if (SBI_HARTMASK_MAX_BITS <= target_hart)
-		return;
-	clint = clint_ipi_hartid2data[target_hart];
-	if (!clint)
-		return;
-
-	/* Set CLINT IPI */
-	writel(1, &clint->ipi[target_hart - clint->first_hartid]);
-}
-
-static void clint_ipi_clear(u32 target_hart)
-{
-	struct clint_data *clint;
-
-	if (SBI_HARTMASK_MAX_BITS <= target_hart)
-		return;
-	clint = clint_ipi_hartid2data[target_hart];
-	if (!clint)
-		return;
-
-	/* Clear CLINT IPI */
-	writel(0, &clint->ipi[target_hart - clint->first_hartid]);
-}
-
-static struct sbi_ipi_device clint_ipi = {
-	.name = "clint",
-	.ipi_send = clint_ipi_send,
-	.ipi_clear = clint_ipi_clear
-};
-
-int clint_warm_ipi_init(void)
-{
-	/* Clear CLINT IPI for current HART */
-	clint_ipi_clear(current_hartid());
-
-	return 0;
-}
-
-int clint_cold_ipi_init(struct clint_data *clint)
-{
-	u32 i;
-	int rc;
-	struct sbi_domain_memregion reg;
-
-	if (!clint)
-		return SBI_EINVAL;
-
-	/* Initialize private data */
-	clint->ipi = (void *)clint->addr;
-
-	/* Update IPI hartid table */
-	for (i = 0; i < clint->hart_count; i++)
-		clint_ipi_hartid2data[clint->first_hartid + i] = clint;
-
-	/* Add CLINT ipi region to the root domain */
-	sbi_domain_memregion_init(clint->addr + CLINT_IPI_OFF,
-				  CLINT_IPI_SIZE,
-				  SBI_DOMAIN_MEMREGION_MMIO, &reg);
-	rc = sbi_domain_root_add_memregion(&reg);
-	if (rc)
-		return rc;
-
-	sbi_ipi_set_device(&clint_ipi);
-
-	return 0;
-}
-
-static struct clint_data *clint_timer_hartid2data[SBI_HARTMASK_MAX_BITS];
-
-#if __riscv_xlen != 32
-static u64 clint_time_rd64(volatile u64 *addr)
-{
-	return readq_relaxed(addr);
-}
-
-static void clint_time_wr64(u64 value, volatile u64 *addr)
-{
-	writeq_relaxed(value, addr);
-}
-#endif
-
-static u64 clint_time_rd32(volatile u64 *addr)
-{
-	u32 lo, hi;
-
-	do {
-		hi = readl_relaxed((u32 *)addr + 1);
-		lo = readl_relaxed((u32 *)addr);
-	} while (hi != readl_relaxed((u32 *)addr + 1));
-
-	return ((u64)hi << 32) | (u64)lo;
-}
-
-static void clint_time_wr32(u64 value, volatile u64 *addr)
-{
-	u32 mask = -1U;
-
-	writel_relaxed(value & mask, (void *)(addr));
-	writel_relaxed(value >> 32, (void *)(addr) + 0x04);
-}
-
-static u64 clint_timer_value(void)
-{
-	struct clint_data *clint = clint_timer_hartid2data[current_hartid()];
-
-	/* Read CLINT Time Value */
-	return clint->time_rd(clint->time_val) + clint->time_delta;
-}
-
-static void clint_timer_event_stop(void)
-{
-	u32 target_hart = current_hartid();
-	struct clint_data *clint = clint_timer_hartid2data[target_hart];
-
-	/* Clear CLINT Time Compare */
-	clint->time_wr(-1ULL,
-			&clint->time_cmp[target_hart - clint->first_hartid]);
-}
-
-static void clint_timer_event_start(u64 next_event)
-{
-	u32 target_hart = current_hartid();
-	struct clint_data *clint = clint_timer_hartid2data[target_hart];
-
-	/* Program CLINT Time Compare */
-	clint->time_wr(next_event - clint->time_delta,
-		       &clint->time_cmp[target_hart - clint->first_hartid]);
-}
-
-static struct sbi_timer_device clint_timer = {
-	.name = "clint",
-	.timer_value = clint_timer_value,
-	.timer_event_start = clint_timer_event_start,
-	.timer_event_stop = clint_timer_event_stop
-};
-
-int clint_warm_timer_init(void)
-{
-	u64 v1, v2, mv;
-	u32 target_hart = current_hartid();
-	struct clint_data *reference;
-	struct clint_data *clint = clint_timer_hartid2data[target_hart];
-
-	if (!clint)
-		return SBI_ENODEV;
-
-	/*
-	 * Compute delta if reference available
-	 *
-	 * We deliberately compute time_delta in warm init so that time_delta
-	 * is computed on a HART which is going to use given CLINT. We use
-	 * atomic flag timer_delta_computed to ensure that only one HART does
-	 * time_delta computation.
-	 */
-	if (clint->time_delta_reference) {
-		reference = clint->time_delta_reference;
-		if (!atomic_raw_xchg_ulong(&clint->time_delta_computed, 1)) {
-			v1 = clint->time_rd(clint->time_val);
-			mv = reference->time_rd(reference->time_val);
-			v2 = clint->time_rd(clint->time_val);
-			clint->time_delta = mv - ((v1 / 2) + (v2 / 2));
-		}
-	}
-
-	/* Clear CLINT Time Compare */
-	clint->time_wr(-1ULL,
-		       &clint->time_cmp[target_hart - clint->first_hartid]);
-
-	return 0;
-}
-
-int clint_cold_timer_init(struct clint_data *clint,
-			  struct clint_data *reference)
-{
-	u32 i;
-	int rc;
-	struct sbi_domain_memregion reg;
-
-	if (!clint)
-		return SBI_EINVAL;
-
-	/* Initialize private data */
-	clint->time_delta_reference = reference;
-	clint->time_delta_computed = 0;
-	clint->time_delta = 0;
-	clint->time_val = (u64 *)((void *)clint->addr + CLINT_TIME_VAL_OFF);
-	clint->time_cmp = (u64 *)((void *)clint->addr + CLINT_TIME_CMP_OFF);
-	clint->time_rd = clint_time_rd32;
-	clint->time_wr = clint_time_wr32;
-
-	/* Override read/write accessors for 64bit MMIO */
-#if __riscv_xlen != 32
-	if (clint->has_64bit_mmio) {
-		clint->time_rd = clint_time_rd64;
-		clint->time_wr = clint_time_wr64;
-	}
-#endif
-
-	/* Update timer hartid table */
-	for (i = 0; i < clint->hart_count; i++)
-		clint_timer_hartid2data[clint->first_hartid + i] = clint;
-
-	/* Add CLINT mtime region to the root domain */
-	sbi_domain_memregion_init(clint->addr + CLINT_TIME_VAL_OFF,
-				  CLINT_TIME_VAL_SIZE,
-				  SBI_DOMAIN_MEMREGION_MMIO, &reg);
-	rc = sbi_domain_root_add_memregion(&reg);
-	if (rc)
-		return rc;
-
-	/* Add CLINT timecmp region to the root domain */
-	sbi_domain_memregion_init(clint->addr + CLINT_TIME_CMP_OFF,
-				  CLINT_TIME_CMP_SIZE,
-				  SBI_DOMAIN_MEMREGION_MMIO, &reg);
-	rc = sbi_domain_root_add_memregion(&reg);
-	if (rc)
-		return rc;
-
-	sbi_timer_set_device(&clint_timer);
-
-	return 0;
-}
diff --git a/lib/utils/sys/objects.mk b/lib/utils/sys/objects.mk
index 7878ca8..06be322 100644
--- a/lib/utils/sys/objects.mk
+++ b/lib/utils/sys/objects.mk
@@ -7,6 +7,5 @@
 #   Anup Patel <anup.patel@wdc.com>
 #
 
-libsbiutils-objs-y += sys/clint.o
 libsbiutils-objs-y += sys/htif.o
 libsbiutils-objs-y += sys/sifive_test.o