riscv: Rename SiFive CLINT to RISC-V ALINT
As the RISC-V ACLINT specification is defined to be backward compatible
with the SiFive CLINT specification, we rename SiFive CLINT to RISC-V
ALINT in the source tree to be future-proof.
Signed-off-by: Bin Meng <bmeng@tinylab.org>
Reviewed-by: Rick Chen <rick@andestech.com>
diff --git a/arch/riscv/lib/aclint_ipi.c b/arch/riscv/lib/aclint_ipi.c
new file mode 100644
index 0000000..90b8e12
--- /dev/null
+++ b/arch/riscv/lib/aclint_ipi.c
@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2020, Sean Anderson <seanga2@gmail.com>
+ * 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/global_data.h>
+#include <asm/io.h>
+#include <asm/smp.h>
+#include <asm/syscon.h>
+#include <linux/err.h>
+
+/* MSIP registers */
+#define MSIP_REG(base, hart) ((ulong)(base) + (hart) * 4)
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int riscv_init_ipi(void)
+{
+ int ret;
+ struct udevice *dev;
+
+ ret = uclass_get_device_by_driver(UCLASS_TIMER,
+ DM_DRIVER_GET(riscv_aclint_timer), &dev);
+ if (ret)
+ return ret;
+
+ if (dev_get_driver_data(dev) != 0)
+ gd->arch.aclint = dev_read_addr_ptr(dev);
+ else
+ gd->arch.aclint = syscon_get_first_range(RISCV_SYSCON_ACLINT);
+
+ if (!gd->arch.aclint)
+ return -EINVAL;
+
+ return 0;
+}
+
+int riscv_send_ipi(int hart)
+{
+ writel(1, (void __iomem *)MSIP_REG(gd->arch.aclint, hart));
+
+ return 0;
+}
+
+int riscv_clear_ipi(int hart)
+{
+ writel(0, (void __iomem *)MSIP_REG(gd->arch.aclint, hart));
+
+ return 0;
+}
+
+int riscv_get_ipi(int hart, int *pending)
+{
+ *pending = readl((void __iomem *)MSIP_REG(gd->arch.aclint, hart));
+
+ return 0;
+}
+
+static const struct udevice_id riscv_aclint_swi_ids[] = {
+ { .compatible = "riscv,aclint-mswi", .data = RISCV_SYSCON_ACLINT },
+ { }
+};
+
+U_BOOT_DRIVER(riscv_aclint_swi) = {
+ .name = "riscv_aclint_swi",
+ .id = UCLASS_SYSCON,
+ .of_match = riscv_aclint_swi_ids,
+ .flags = DM_FLAG_PRE_RELOC,
+};