[PATCH 09/12] lib: utils/ipi: Add Andes fdt ipi driver support

[Yu Chien Peter Lin <peterlin@andestech.com>]

Move Andes PLICSW ipi device to fdt ipi framework, this patch is based
on Leo's modified IPI scheme on PLICSW.

Current IPI scheme uses bit 0 of pending reigster on PLICSW to send IPI
from hart 0 to hart 7, but bit 0 needs to be hardwired to 0 according
to spec. After some investigation, self-IPI seems to be seldom or never
used, so we re-order the IPI scheme to support 8 core bitmaps.

dts example (ax45mp 4 core):

  plic1: interrupt-controller at e6400000 {
          compatible = "riscv,plic1";
          reg = <0x00000000 0xe6400000 0x00000000 0x00400000>;
          interrupts-extended = < &CPU0_intc 3
                                  &CPU1_intc 3
                                  &CPU2_intc 3
                                  &CPU3_intc 3>;
          interrupt-controller;
          #address-cells = <2>;
          #interrupt-cells = <2>;
          riscv,ndev = <4>;
  };

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
---
 include/sbi_utils/fdt/fdt_helper.h   |   3 +
 include/sbi_utils/ipi/andes_plicsw.h |  47 +++++++++
 lib/utils/fdt/fdt_helper.c           |  59 ++++++++++++
 lib/utils/ipi/Kconfig                |   9 ++
 lib/utils/ipi/andes_plicsw.c         |  84 ++++++++++++++++
 lib/utils/ipi/fdt_ipi_plicsw.c       |  79 +++++++++++++++
 lib/utils/ipi/objects.mk             |   4 +
 platform/andes/ae350/Kconfig         |   2 +
 platform/andes/ae350/objects.mk      |   2 +-
 platform/andes/ae350/platform.c      |  27 +-----
 platform/andes/ae350/platform.h      |   2 -
 platform/andes/ae350/plicsw.c        | 139 ---------------------------
 platform/andes/ae350/plicsw.h        |  44 ---------
 13 files changed, 290 insertions(+), 211 deletions(-)
 create mode 100644 include/sbi_utils/ipi/andes_plicsw.h
 create mode 100644 lib/utils/ipi/andes_plicsw.c
 create mode 100644 lib/utils/ipi/fdt_ipi_plicsw.c
 delete mode 100644 platform/andes/ae350/plicsw.c
 delete mode 100644 platform/andes/ae350/plicsw.h

diff --git a/include/sbi_utils/fdt/fdt_helper.h b/include/sbi_utils/fdt/fdt_helper.h
index 7ef63c9..7e0083a 100644
--- a/include/sbi_utils/fdt/fdt_helper.h
+++ b/include/sbi_utils/fdt/fdt_helper.h
@@ -98,6 +98,9 @@ int fdt_parse_aclint_node(void *fdt, int nodeoffset, bool for_timer,
 int fdt_parse_plmt_node(void *fdt, int nodeoffset, unsigned long *plmt_base,
 			  unsigned long *plmt_size, u32 *hart_count);
 
+int fdt_parse_plicsw_node(void *fdt, int nodeoffset, unsigned long *plicsw_base,
+			  unsigned long *size, unsigned long *num_src, u32 *hart_count);
+
 int fdt_parse_compat_addr(void *fdt, uint64_t *addr,
 			  const char *compatible);
 
diff --git a/include/sbi_utils/ipi/andes_plicsw.h b/include/sbi_utils/ipi/andes_plicsw.h
new file mode 100644
index 0000000..81dabfd
--- /dev/null
+++ b/include/sbi_utils/ipi/andes_plicsw.h
@@ -0,0 +1,47 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2022 Andes Technology Corporation
+ *
+ * Authors:
+ *   Zong Li <zong@andestech.com>
+ *   Nylon Chen <nylon7@andestech.com>
+ *   Yu Chien Peter Lin <peterlin@andestech.com>
+ */
+
+#include <sbi/riscv_asm.h>
+#include <sbi/riscv_io.h>
+#include <sbi/sbi_types.h>
+
+#ifndef _IPI_ANDES_PLICSW_H_
+#define _IPI_ANDES_PLICSW_H_
+
+#define PLICSW_PRIORITY_BASE 0x4
+
+#define PLICSW_PENDING_BASE 0x1000
+#define PLICSW_PENDING_STRIDE 0x8
+
+#define PLICSW_ENABLE_BASE 0x2000
+#define PLICSW_ENABLE_STRIDE 0x80
+
+#define PLICSW_CONTEXT_BASE 0x200000
+#define PLICSW_CONTEXT_STRIDE 0x1000
+#define PLICSW_CONTEXT_CLAIM 0x4
+
+#define PLICSW_HART_MASK 0x01010101
+
+#define PLICSW_HART_MAX_NR 8
+
+struct plicsw_data {
+	unsigned long addr;
+	unsigned long size;
+	unsigned long num_src;
+	uint32_t hart_count;
+	/* hart id to source id table */
+	uint32_t source_id[PLICSW_HART_MAX_NR];
+};
+
+void plicsw_ipi_send(u32 target_hart);
+void plicsw_ipi_clear(u32 target_hart);
+
+#endif /* _IPI_ANDES_PLICSW_H_ */
diff --git a/lib/utils/fdt/fdt_helper.c b/lib/utils/fdt/fdt_helper.c
index ce52fca..bed8b0a 100644
--- a/lib/utils/fdt/fdt_helper.c
+++ b/lib/utils/fdt/fdt_helper.c
@@ -889,6 +889,65 @@ int fdt_parse_plmt_node(void *fdt, int nodeoffset, unsigned long *plmt_base,
 	return 0;
 }
 
+int fdt_parse_plicsw_node(void *fdt, int nodeoffset, unsigned long *plicsw_base,
+			  unsigned long *size, unsigned long *num_src, u32 *hart_count)
+{
+	const fdt32_t *val;
+	int rc, i, count, len;
+	uint64_t reg_addr, reg_size, cpu_offset, cpu_intc_offset;
+	u32 phandle, hwirq, hartid, hcount;
+
+	if (nodeoffset < 0 || !fdt || !plicsw_base ||
+	    !hart_count || !size)
+		return SBI_EINVAL;
+
+	rc = fdt_get_node_addr_size(fdt, nodeoffset, 0,
+				    &reg_addr, &reg_size);
+	if (rc < 0 || !plicsw_base || !size)
+		return SBI_ENODEV;
+	*plicsw_base = reg_addr;
+	*size = reg_size;
+
+	val = fdt_getprop(fdt, nodeoffset, "riscv,ndev", &len);
+	if (len > 0)
+		*num_src = fdt32_to_cpu(*val);
+
+	val = fdt_getprop(fdt, nodeoffset, "interrupts-extended", &count);
+	if (!val || count < sizeof(fdt32_t))
+		return 0;
+	count = count / sizeof(fdt32_t);
+
+	hcount = 0;
+	for (i = 0; i < (count / 2); i++) {
+		phandle = fdt32_to_cpu(val[2 * i]);
+		hwirq = fdt32_to_cpu(val[2 * i + 1]);
+
+		cpu_intc_offset = fdt_node_offset_by_phandle(fdt, phandle);
+		if (cpu_intc_offset < 0)
+			continue;
+
+		cpu_offset = fdt_parent_offset(fdt, cpu_intc_offset);
+		if (cpu_intc_offset < 0)
+			continue;
+
+		rc = fdt_parse_hart_id(fdt, cpu_offset, &hartid);
+
+		if (rc)
+			continue;
+
+		if (SBI_HARTMASK_MAX_BITS <= hartid)
+			continue;
+
+		if (hwirq == IRQ_M_SOFT)
+			hcount++;
+	}
+
+	*hart_count = hcount;
+
+	return 0;
+}
+
+
 int fdt_parse_compat_addr(void *fdt, uint64_t *addr,
 			  const char *compatible)
 {
diff --git a/lib/utils/ipi/Kconfig b/lib/utils/ipi/Kconfig
index efc8960..3718852 100644
--- a/lib/utils/ipi/Kconfig
+++ b/lib/utils/ipi/Kconfig
@@ -14,10 +14,19 @@ config FDT_IPI_MSWI
 	select IPI_MSWI
 	default n
 
+config FDT_IPI_PLICSW
+	bool "Andes PLICSW FDT driver"
+	select IPI_PLICSW
+	default n
+
 endif
 
 config IPI_MSWI
 	bool "ACLINT MSWI support"
 	default n
 
+config IPI_PLICSW
+	bool "Andes PLICSW support"
+	default n
+
 endmenu
diff --git a/lib/utils/ipi/andes_plicsw.c b/lib/utils/ipi/andes_plicsw.c
new file mode 100644
index 0000000..9001aa0
--- /dev/null
+++ b/lib/utils/ipi/andes_plicsw.c
@@ -0,0 +1,84 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2022 Andes Technology Corporation
+ *
+ * Authors:
+ *   Zong Li <zong@andestech.com>
+ *   Nylon Chen <nylon7@andestech.com>
+ *   Yu Chien Peter Lin <peterlin@andestech.com>
+ */
+
+#include <sbi/sbi_types.h>
+#include <sbi_utils/ipi/andes_plicsw.h>
+
+extern struct plicsw_data plicsw;
+
+static inline void plicsw_claim(void)
+{
+	u32 hartid = current_hartid();
+
+	if (plicsw.hart_count <= hartid)
+		ebreak();
+
+	plicsw.source_id[hartid] =
+		readl((void *)plicsw.addr + PLICSW_CONTEXT_BASE +
+		      PLICSW_CONTEXT_CLAIM + PLICSW_CONTEXT_STRIDE * hartid);
+}
+
+static inline void plicsw_complete(void)
+{
+	u32 hartid = current_hartid();
+	u32 source = plicsw.source_id[hartid];
+
+	writel(source, (void *)plicsw.addr + PLICSW_CONTEXT_BASE +
+			       PLICSW_CONTEXT_CLAIM +
+			       PLICSW_CONTEXT_STRIDE * hartid);
+}
+
+static inline void plic_sw_pending(u32 target_hart)
+{
+	/*
+	 * The pending array registers are w1s type.
+	 * IPI pending array mapping as following:
+	 *
+	 * Pending array start address: base + 0x1000
+	 * ---------------------------------
+	 * | hart3 | hart2 | hart1 | hart0 |
+	 * ---------------------------------
+	 * Each hartX can send IPI to another hart by setting the
+	 * bitY to its own region (see the below).
+	 *
+	 * In each hartX region:
+	 * <---------- PICSW_PENDING_STRIDE -------->
+	 * | bit7 | ... | bit3 | bit2 | bit1 | bit0 |
+	 * ------------------------------------------
+	 * The bitY of hartX region indicates that hartX sends an
+	 * IPI to hartY.
+	 */
+	u32 hartid	    = current_hartid();
+	u32 word_index	    = hartid / 4;
+	u32 per_hart_offset = PLICSW_PENDING_STRIDE * hartid;
+	u32 val		    = 1 << target_hart << per_hart_offset;
+
+	writel(val, (void *)plicsw.addr + PLICSW_PENDING_BASE + word_index * 4);
+}
+
+void plicsw_ipi_send(u32 target_hart)
+{
+	if (plicsw.hart_count <= target_hart)
+		ebreak();
+
+	/* Set PLICSW IPI */
+	plic_sw_pending(target_hart);
+}
+
+void plicsw_ipi_clear(u32 target_hart)
+{
+	if (plicsw.hart_count <= target_hart)
+		ebreak();
+
+	/* Clear PLICSW IPI */
+	plicsw_claim();
+	plicsw_complete();
+}
diff --git a/lib/utils/ipi/fdt_ipi_plicsw.c b/lib/utils/ipi/fdt_ipi_plicsw.c
new file mode 100644
index 0000000..9d5c301
--- /dev/null
+++ b/lib/utils/ipi/fdt_ipi_plicsw.c
@@ -0,0 +1,79 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2022 Andes Technology Corporation
+ *
+ * Authors:
+ *   Zong Li <zong@andestech.com>
+ *   Nylon Chen <nylon7@andestech.com>
+ *   Leo Yu-Chi Liang <ycliang@andestech.com>
+ *   Yu Chien Peter Lin <peterlin@andestech.com>
+ */
+
+#include <sbi/sbi_error.h>
+#include <sbi/sbi_ipi.h>
+#include <sbi_utils/fdt/fdt_helper.h>
+#include <sbi_utils/ipi/fdt_ipi.h>
+#include <sbi_utils/ipi/andes_plicsw.h>
+
+struct plicsw_data plicsw;
+
+static struct sbi_ipi_device plicsw_ipi = {
+	.name = "andes_plicsw",
+	.ipi_send = plicsw_ipi_send,
+	.ipi_clear = plicsw_ipi_clear
+};
+
+static int plicsw_warm_ipi_init(void)
+{
+	u32 hartid = current_hartid();
+
+	/* Clear PLICSW IPI */
+	plicsw_ipi_clear(hartid);
+
+	return 0;
+}
+
+static int plicsw_cold_ipi_init(void *fdt, int nodeoff,
+				const struct fdt_match *match)
+{
+	int rc;
+
+	rc = fdt_parse_plicsw_node(fdt, nodeoff, &plicsw.addr, &plicsw.size,
+				   &plicsw.num_src, &plicsw.hart_count);
+	if (rc)
+		return rc;
+
+	/* Setup source priority */
+	uint32_t *priority = (void *)plicsw.addr + PLICSW_PRIORITY_BASE;
+
+	for (int i = 0; i < plicsw.hart_count; i++)
+		writel(1, &priority[i]);
+
+	/* Setup target enable */
+	uint32_t enable_mask = PLICSW_HART_MASK;
+
+	for (int i = 0; i < plicsw.hart_count; i++) {
+		uint32_t *enable = (void *)plicsw.addr + PLICSW_ENABLE_BASE +
+				   PLICSW_ENABLE_STRIDE * i;
+		writel(enable_mask, enable);
+		writel(enable_mask, enable + 1);
+		enable_mask <<= 1;
+	}
+
+	sbi_ipi_set_device(&plicsw_ipi);
+
+	return 0;
+}
+
+static const struct fdt_match ipi_plicsw_match[] = {
+	{ .compatible = "riscv,plic1" },
+	{},
+};
+
+struct fdt_ipi fdt_ipi_plicsw = {
+	.match_table = ipi_plicsw_match,
+	.cold_init   = plicsw_cold_ipi_init,
+	.warm_init   = plicsw_warm_ipi_init,
+	.exit	     = NULL,
+};
diff --git a/lib/utils/ipi/objects.mk b/lib/utils/ipi/objects.mk
index 0600cac..999e7bd 100644
--- a/lib/utils/ipi/objects.mk
+++ b/lib/utils/ipi/objects.mk
@@ -8,9 +8,13 @@
 #
 
 libsbiutils-objs-$(CONFIG_IPI_MSWI) += ipi/aclint_mswi.o
+libsbiutils-objs-$(CONFIG_IPI_PLICSW) += ipi/andes_plicsw.o
 
 libsbiutils-objs-$(CONFIG_FDT_IPI) += ipi/fdt_ipi.o
 libsbiutils-objs-$(CONFIG_FDT_IPI) += ipi/fdt_ipi_drivers.o
 
 carray-fdt_ipi_drivers-$(CONFIG_FDT_IPI_MSWI) += fdt_ipi_mswi
 libsbiutils-objs-$(CONFIG_FDT_IPI_MSWI) += ipi/fdt_ipi_mswi.o
+
+carray-fdt_ipi_drivers-$(CONFIG_FDT_IPI_PLICSW) += fdt_ipi_plicsw
+libsbiutils-objs-$(CONFIG_FDT_IPI_PLICSW) += ipi/fdt_ipi_plicsw.o
diff --git a/platform/andes/ae350/Kconfig b/platform/andes/ae350/Kconfig
index 084b27f..38e4001 100644
--- a/platform/andes/ae350/Kconfig
+++ b/platform/andes/ae350/Kconfig
@@ -11,6 +11,8 @@ config PLATFORM_ANDES_AE350
 	select FDT_RESET_ATCWDT200
 	select FDT_IRQCHIP
 	select FDT_IRQCHIP_PLIC
+	select FDT_IPI
+	select FDT_IPI_PLICSW
 	default y
 
 if PLATFORM_ANDES_AE350
diff --git a/platform/andes/ae350/objects.mk b/platform/andes/ae350/objects.mk
index 1ccb894..a4a2332 100644
--- a/platform/andes/ae350/objects.mk
+++ b/platform/andes/ae350/objects.mk
@@ -15,7 +15,7 @@ platform-asflags-y =
 platform-ldflags-y =
 
 # Objects to build
-platform-objs-y += cache.o platform.o plicsw.o
+platform-objs-y += cache.o platform.o
 
 # Blobs to build
 FW_TEXT_START=0x00000000
diff --git a/platform/andes/ae350/platform.c b/platform/andes/ae350/platform.c
index cf5417c..30e4606 100644
--- a/platform/andes/ae350/platform.c
+++ b/platform/andes/ae350/platform.c
@@ -25,8 +25,8 @@
 #include <sbi_utils/reset/fdt_reset.h>
 #include <sbi_utils/serial/fdt_serial.h>
 #include <sbi_utils/timer/fdt_timer.h>
+#include <sbi_utils/ipi/fdt_ipi.h>
 #include "platform.h"
-#include "plicsw.h"
 #include "cache.h"
 
 struct sbi_platform platform;
@@ -88,29 +88,6 @@ static int ae350_final_init(bool cold_boot)
 	return 0;
 }
 
-static struct sbi_ipi_device plicsw_ipi = {
-	.name = "ae350_plicsw",
-	.ipi_send = plicsw_ipi_send,
-	.ipi_clear = plicsw_ipi_clear
-};
-
-/* Initialize IPI for current HART. */
-static int ae350_ipi_init(bool cold_boot)
-{
-	int ret;
-
-	if (cold_boot) {
-		ret = plicsw_cold_ipi_init(AE350_PLICSW_ADDR,
-					   AE350_HART_COUNT);
-		if (ret)
-			return ret;
-
-		sbi_ipi_set_device(&plicsw_ipi);
-	}
-
-	return plicsw_warm_ipi_init();
-}
-
 /* Vendor-Specific SBI handler */
 static int ae350_vendor_ext_provider(long extid, long funcid,
 	const struct sbi_trap_regs *regs, unsigned long *out_value,
@@ -163,7 +140,7 @@ const struct sbi_platform_operations platform_ops = {
 
 	.irqchip_init = fdt_irqchip_init,
 
-	.ipi_init     = ae350_ipi_init,
+	.ipi_init     = fdt_ipi_init,
 
 	.timer_init	   = fdt_timer_init,
 
diff --git a/platform/andes/ae350/platform.h b/platform/andes/ae350/platform.h
index 3003bb4..903bef0 100644
--- a/platform/andes/ae350/platform.h
+++ b/platform/andes/ae350/platform.h
@@ -11,8 +11,6 @@
 #ifndef _AE350_PLATFORM_H_
 #define _AE350_PLATFORM_H_
 
-#define AE350_PLICSW_ADDR		0xe6400000
-
 #define AE350_L2C_ADDR			0xe0500000
 
 /*Memory and Miscellaneous Registers*/
diff --git a/platform/andes/ae350/plicsw.c b/platform/andes/ae350/plicsw.c
deleted file mode 100644
index edbbb11..0000000
--- a/platform/andes/ae350/plicsw.c
+++ /dev/null
@@ -1,139 +0,0 @@
-/*
- * SPDX-License-Identifier: BSD-2-Clause
- *
- * Copyright (c) 2019 Andes Technology Corporation
- *
- * Authors:
- *   Zong Li <zong@andestech.com>
- *   Nylon Chen <nylon7@andestech.com>
- */
-
-#include <sbi/riscv_asm.h>
-#include <sbi/riscv_io.h>
-#include <sbi/sbi_types.h>
-#include "plicsw.h"
-#include "platform.h"
-
-static u32 plicsw_ipi_hart_count;
-static struct plicsw plicsw_dev[AE350_HART_COUNT];
-
-static inline void plicsw_claim(void)
-{
-	u32 source_hart = current_hartid();
-
-	plicsw_dev[source_hart].source_id =
-		readl(plicsw_dev[source_hart].plicsw_claim);
-}
-
-static inline void plicsw_complete(void)
-{
-	u32 source_hart = current_hartid();
-	u32 source = plicsw_dev[source_hart].source_id;
-
-	writel(source, plicsw_dev[source_hart].plicsw_claim);
-}
-
-static inline void plic_sw_pending(u32 target_hart)
-{
-	/*
-	 * The pending array registers are w1s type.
-	 * IPI pending array mapping as following:
-	 *
-	 * Pending array start address: base + 0x1000
-	 * -------------------------------------
-	 * | hart 3 | hart 2 | hart 1 | hart 0 |
-	 * -------------------------------------
-	 * Each hart X can send IPI to another hart by setting the
-	 * corresponding bit in hart X own region(see the below).
-	 *
-	 * In each hart region:
-	 * -----------------------------------------------
-	 * | bit 7 | bit 6 | bit 5 | bit 4 | ... | bit 0 |
-	 * -----------------------------------------------
-	 * The bit 7 is used to send IPI to hart 0
-	 * The bit 6 is used to send IPI to hart 1
-	 * The bit 5 is used to send IPI to hart 2
-	 * The bit 4 is used to send IPI to hart 3
-	 */
-	u32 source_hart = current_hartid();
-	u32 target_offset = (PLICSW_PENDING_PER_HART - 1) - target_hart;
-	u32 per_hart_offset = PLICSW_PENDING_PER_HART * source_hart;
-	u32 val = 1 << target_offset << per_hart_offset;
-
-	writel(val, plicsw_dev[source_hart].plicsw_pending);
-}
-
-void plicsw_ipi_send(u32 target_hart)
-{
-	if (plicsw_ipi_hart_count <= target_hart)
-		return;
-
-	/* Set PLICSW IPI */
-	plic_sw_pending(target_hart);
-}
-
-void plicsw_ipi_clear(u32 target_hart)
-{
-	if (plicsw_ipi_hart_count <= target_hart)
-		return;
-
-	/* Clear PLICSW IPI */
-	plicsw_claim();
-	plicsw_complete();
-}
-
-int plicsw_warm_ipi_init(void)
-{
-	u32 hartid = current_hartid();
-
-	if (!plicsw_dev[hartid].plicsw_pending
-	    && !plicsw_dev[hartid].plicsw_enable
-	    && !plicsw_dev[hartid].plicsw_claim)
-		return -1;
-
-	/* Clear PLICSW IPI */
-	plicsw_ipi_clear(hartid);
-
-	return 0;
-}
-
-int plicsw_cold_ipi_init(unsigned long base, u32 hart_count)
-{
-	/* Setup source priority */
-	uint32_t *priority = (void *)base + PLICSW_PRIORITY_BASE;
-
-	for (int i = 0; i < AE350_HART_COUNT * PLICSW_PENDING_PER_HART; i++)
-		writel(1, &priority[i]);
-
-	/* Setup target enable */
-	uint32_t enable_mask = PLICSW_HART_MASK;
-
-	for (int i = 0; i < AE350_HART_COUNT; i++) {
-		uint32_t *enable = (void *)base + PLICSW_ENABLE_BASE
-			+ PLICSW_ENABLE_PER_HART * i;
-		writel(enable_mask, &enable[0]);
-		enable_mask >>= 1;
-	}
-
-	/* Figure-out PLICSW IPI register address */
-	plicsw_ipi_hart_count = hart_count;
-
-	for (u32 hartid = 0; hartid < AE350_HART_COUNT; hartid++) {
-		plicsw_dev[hartid].source_id = 0;
-		plicsw_dev[hartid].plicsw_pending =
-			(void *)base
-			+ PLICSW_PENDING_BASE
-			+ ((hartid / 4) * 4);
-		plicsw_dev[hartid].plicsw_enable  =
-			(void *)base
-			+ PLICSW_ENABLE_BASE
-			+ PLICSW_ENABLE_PER_HART * hartid;
-		plicsw_dev[hartid].plicsw_claim   =
-			(void *)base
-			+ PLICSW_CONTEXT_BASE
-			+ PLICSW_CONTEXT_CLAIM
-			+ PLICSW_CONTEXT_PER_HART * hartid;
-	}
-
-	return 0;
-}
diff --git a/platform/andes/ae350/plicsw.h b/platform/andes/ae350/plicsw.h
deleted file mode 100644
index 58728f6..0000000
--- a/platform/andes/ae350/plicsw.h
+++ /dev/null
@@ -1,44 +0,0 @@
-/*
- * SPDX-License-Identifier: BSD-2-Clause
- *
- * Copyright (c) 2019 Andes Technology Corporation
- *
- * Authors:
- *   Zong Li <zong@andestech.com>
- *   Nylon Chen <nylon7@andestech.com>
- */
-
-#ifndef _AE350_PLICSW_H_
-#define _AE350_PLICSW_H_
-
-#define PLICSW_PRIORITY_BASE		0x4
-
-#define PLICSW_PENDING_BASE		0x1000
-#define PLICSW_PENDING_PER_HART		0x8
-
-#define PLICSW_ENABLE_BASE		0x2000
-#define PLICSW_ENABLE_PER_HART		0x80
-
-#define PLICSW_CONTEXT_BASE		0x200000
-#define PLICSW_CONTEXT_PER_HART		0x1000
-#define PLICSW_CONTEXT_CLAIM		0x4
-
-#define PLICSW_HART_MASK		0x80808080
-
-struct plicsw {
-	u32 source_id;
-
-	volatile uint32_t *plicsw_pending;
-	volatile uint32_t *plicsw_enable;
-	volatile uint32_t *plicsw_claim;
-};
-
-void plicsw_ipi_send(u32 target_hart);
-
-void plicsw_ipi_clear(u32 target_hart);
-
-int plicsw_warm_ipi_init(void);
-
-int plicsw_cold_ipi_init(unsigned long base, u32 hart_count);
-
-#endif /* _AE350_PLICSW_H_ */
-- 
2.34.1