Initial commit.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
2025-08-25 07:41:42 +01:00 · 2018-12-11 19:24:06 +05:30
commit 9e8ff05cb6
67 changed files with 6084 additions and 0 deletions
--- a/lib/sbi_init.c
+++ b/lib/sbi_init.c
@@ -0,0 +1,162 @@
+/*
+ * Copyright (c) 2018 Western Digital Corporation or its affiliates.
+ *
+ * Authors:
+ *   Anup Patel <anup.patel@wdc.com>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <sbi/riscv_asm.h>
+#include <sbi/riscv_atomic.h>
+#include <sbi/sbi_console.h>
+#include <sbi/sbi_ecall.h>
+#include <sbi/sbi_hart.h>
+#include <sbi/sbi_ipi.h>
+#include <sbi/sbi_platform.h>
+#include <sbi/sbi_system.h>
+#include <sbi/sbi_timer.h>
+
+static void __attribute__((noreturn)) init_coldboot(struct sbi_scratch *scratch,
+						    u32 hartid)
+{
+	int rc;
+	char str[64];
+	struct sbi_platform *plat = sbi_platform_ptr(scratch);
+
+	rc = sbi_system_cold_early_init(scratch);
+	if (rc)
+		sbi_hart_hang();
+
+	rc = sbi_system_warm_early_init(scratch, hartid);
+	if (rc)
+		sbi_hart_hang();
+
+	rc = sbi_hart_init(scratch, hartid);
+	if (rc)
+		sbi_hart_hang();
+
+	rc = sbi_console_init(scratch);
+	if (rc)
+		sbi_hart_hang();
+
+	rc = sbi_platform_cold_irqchip_init(plat);
+	if (rc)
+		sbi_hart_hang();
+
+	rc = sbi_platform_warm_irqchip_init(plat, hartid);
+	if (rc)
+		sbi_hart_hang();
+
+	rc = sbi_ipi_cold_init(scratch);
+	if (rc)
+		sbi_hart_hang();
+
+	rc = sbi_ipi_warm_init(scratch, hartid);
+	if (rc)
+		sbi_hart_hang();
+
+	rc = sbi_timer_cold_init(scratch);
+	if (rc)
+		sbi_hart_hang();
+
+	rc = sbi_timer_warm_init(scratch, hartid);
+	if (rc)
+		sbi_hart_hang();
+
+	rc = sbi_system_cold_final_init(scratch);
+	if (rc)
+		sbi_hart_hang();
+
+	rc = sbi_system_warm_final_init(scratch, hartid);
+	if (rc)
+		sbi_hart_hang();
+
+	misa_string(str, sizeof(str));
+	sbi_printf("OpenSBI v%d.%d (%s %s)\n",
+		   OPENSBI_MAJOR, OPENSBI_MINOR,
+		   __DATE__, __TIME__);
+	sbi_printf("\n");
+	/* Platform details */
+	sbi_printf("Platform Name          : %s\n", sbi_platform_name(plat));
+	sbi_printf("Platform HART Features : RV%d%s\n", misa_xlen(), str);
+	sbi_printf("Platform Max HARTs     : %d\n",
+		   sbi_platform_hart_count(plat));
+	/* Firmware details */
+	sbi_printf("Firmware Base          : 0x%lx\n", scratch->fw_start);
+	sbi_printf("Firmware Size          : %d KB\n",
+		   (u32)(scratch->fw_size / 1024));
+	/* Generic details */
+	sbi_printf("Runtime SBI Version    : %d.%d\n",
+		   sbi_ecall_version_major(), sbi_ecall_version_minor());
+	sbi_printf("\n");
+
+	sbi_hart_pmp_dump();
+
+	sbi_hart_mark_available(hartid);
+
+	if (!sbi_platform_has_hart_hotplug(plat))
+		sbi_hart_wake_coldboot_harts(scratch);
+
+	sbi_hart_boot_next(hartid, scratch->next_arg1,
+			   scratch->next_addr, scratch->next_mode);
+}
+
+static void __attribute__((noreturn)) init_warmboot(struct sbi_scratch *scratch,
+						    u32 hartid)
+{
+	int rc;
+	struct sbi_platform *plat = sbi_platform_ptr(scratch);
+
+	if (!sbi_platform_has_hart_hotplug(plat))
+		sbi_hart_wait_for_coldboot(scratch, hartid);
+
+	rc = sbi_system_warm_early_init(scratch, hartid);
+	if (rc)
+		sbi_hart_hang();
+
+	rc = sbi_hart_init(scratch, hartid);
+	if (rc)
+		sbi_hart_hang();
+
+	rc = sbi_platform_warm_irqchip_init(plat, hartid);
+	if (rc)
+		sbi_hart_hang();
+
+	rc = sbi_ipi_warm_init(scratch, hartid);
+	if (rc)
+		sbi_hart_hang();
+
+	rc = sbi_timer_warm_init(scratch, hartid);
+	if (rc)
+		sbi_hart_hang();
+
+	rc = sbi_system_warm_final_init(scratch, hartid);
+	if (rc)
+		sbi_hart_hang();
+
+	sbi_hart_mark_available(hartid);
+
+	if (sbi_platform_has_hart_hotplug(plat))
+		/* TODO: To be implemented in-future. */
+		sbi_hart_hang();
+	else
+		sbi_hart_boot_next(hartid, scratch->next_arg1,
+				   scratch->next_addr, scratch->next_mode);
+}
+
+static atomic_t coldboot_lottery = ATOMIC_INITIALIZER(0);
+
+void __attribute__((noreturn)) sbi_init(struct sbi_scratch *scratch)
+{
+	bool coldboot = FALSE;
+	u32 hartid = csr_read(mhartid);
+
+	if (atomic_add_return(&coldboot_lottery, 1) == 1)
+		coldboot = TRUE;
+
+	if (coldboot)
+		init_coldboot(scratch, hartid);
+	else
+		init_warmboot(scratch, hartid);
+}