platform: Move platform common to lib/utils.

Currently, platform/common contains platform/non-platform specific
common minimal drivers and libraries. This is helpful is all platforms
are built within opensbi framework.

Move them to lib/utils so that any external platform code also can
reuse the minimalistic drivers or other common libraries.

This patch doesn't introduce any functional changes.

Signed-off-by: Atish Patra <[email protected]>
Acked-by: Anup Patel <[email protected]>

2 files changed, 0 insertions, 172 deletions

diff --git a/platform/common/sys/clint.c b/platform/common/sys/clint.c
deleted file mode 100644
index eba056f1..00000000
--- a/platform/common/sys/clint.c
+++ /dev/null
@@ -1,162 +0,0 @@
-/*
- * SPDX-License-Identifier: BSD-2-Clause
- *
- * Copyright (c) 2019 Western Digital Corporation or its affiliates.
- *
- * Authors:
- *   Anup Patel <[email protected]>
- */
-
-#include <sbi/riscv_io.h>
-#include <sbi/riscv_atomic.h>
-#include <sbi/sbi_hart.h>
-#include <plat/sys/clint.h>
-
-static u32 clint_ipi_hart_count;
-static volatile void *clint_ipi_base;
-static volatile u32 *clint_ipi;
-
-void clint_ipi_send(u32 target_hart)
-{
-	if (clint_ipi_hart_count <= target_hart)
-		return;
-
-	/* Set CLINT IPI */
-	writel(1, &clint_ipi[target_hart]);
-}
-
-void clint_ipi_sync(u32 target_hart)
-{
-	u32 target_ipi, incoming_ipi;
-	u32 source_hart = sbi_current_hartid();
-
-	if (clint_ipi_hart_count <= target_hart)
-		return;
-
-	/* Wait until target HART has handled IPI */
-	incoming_ipi = 0;
-	while (1) {
-		target_ipi = readl(&clint_ipi[target_hart]);
-		if (!target_ipi)
-			break;
-
-		incoming_ipi |=
-			atomic_raw_xchg_uint(&clint_ipi[source_hart], 0);
-	}
-
-	if (incoming_ipi)
-		writel(incoming_ipi, &clint_ipi[source_hart]);
-}
-
-void clint_ipi_clear(u32 target_hart)
-{
-	if (clint_ipi_hart_count <= target_hart)
-		return;
-
-	/* Clear CLINT IPI */
-	writel(0, &clint_ipi[target_hart]);
-}
-
-int clint_warm_ipi_init(void)
-{
-	u32 hartid = sbi_current_hartid();
-
-	if (!clint_ipi_base)
-		return -1;
-
-	/* Clear CLINT IPI */
-	clint_ipi_clear(hartid);
-
-	return 0;
-}
-
-int clint_cold_ipi_init(unsigned long base, u32 hart_count)
-{
-	/* Figure-out CLINT IPI register address */
-	clint_ipi_hart_count = hart_count;
-	clint_ipi_base	     = (void *)base;
-	clint_ipi	     = (u32 *)clint_ipi_base;
-
-	return 0;
-}
-
-static u32 clint_time_hart_count;
-static volatile void *clint_time_base;
-static volatile u64 *clint_time_val;
-static volatile u64 *clint_time_cmp;
-
-u64 clint_timer_value(void)
-{
-#if __riscv_xlen == 64
-	return readq_relaxed(clint_time_val);
-#else
-	u64 tmp;
-	tmp = readl_relaxed((void *)clint_time_val + 0x04);
-	tmp <<= 32;
-	tmp |= readl_relaxed(clint_time_val);
-	return tmp;
-#endif
-}
-
-void clint_timer_event_stop(void)
-{
-	u32 target_hart = sbi_current_hartid();
-
-	if (clint_time_hart_count <= target_hart)
-		return;
-
-		/* Clear CLINT Time Compare */
-#if __riscv_xlen == 64
-	writeq_relaxed(-1ULL, &clint_time_cmp[target_hart]);
-#else
-	writel_relaxed(-1UL, &clint_time_cmp[target_hart]);
-	writel_relaxed(-1UL, (void *)(&clint_time_cmp[target_hart]) + 0x04);
-#endif
-}
-
-void clint_timer_event_start(u64 next_event)
-{
-	u32 target_hart = sbi_current_hartid();
-
-	if (clint_time_hart_count <= target_hart)
-		return;
-
-		/* Program CLINT Time Compare */
-#if __riscv_xlen == 64
-	writeq_relaxed(next_event, &clint_time_cmp[target_hart]);
-#else
-	u32 mask = -1UL;
-	writel_relaxed(next_event & mask, &clint_time_cmp[target_hart]);
-	writel_relaxed(next_event >> 32,
-		       (void *)(&clint_time_cmp[target_hart]) + 0x04);
-#endif
-}
-
-int clint_warm_timer_init(void)
-{
-	u32 target_hart = sbi_current_hartid();
-
-	if (clint_time_hart_count <= target_hart || !clint_time_base)
-		return -1;
-
-		/* Clear CLINT Time Compare */
-#if __riscv_xlen == 64
-	writeq_relaxed(-1ULL, &clint_time_cmp[target_hart]);
-#else
-	writel_relaxed(-1UL, &clint_time_cmp[target_hart]);
-	writel_relaxed(-1UL, (void *)(&clint_time_cmp[target_hart]) + 0x04);
-#endif
-
-	return 0;
-}
-
-int clint_cold_timer_init(unsigned long base, u32 hart_count)
-{
-	/* Figure-out CLINT Time register address */
-	clint_time_hart_count = hart_count;
-	clint_time_base	      = (void *)base;
-	clint_time_val	      = (u64 *)(clint_time_base + 0xbff8);
-	clint_time_cmp	      = (u64 *)(clint_time_base + 0x4000);
-
-	return 0;
-}
diff --git a/platform/common/sys/objects.mk b/platform/common/sys/objects.mk
deleted file mode 100644
index 5cb98869..00000000
--- a/platform/common/sys/objects.mk
+++ /dev/null
@@ -1,10 +0,0 @@
-#
-# SPDX-License-Identifier: BSD-2-Clause
-#
-# Copyright (c) 2019 Western Digital Corporation or its affiliates.
-#
-# Authors:
-#   Anup Patel <[email protected]>
-#
-
-platform-common-objs-$(PLATFORM_SYS_CLINT) += sys/clint.o