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+/*
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+ * SPDX-License-Identifier: BSD-2-Clause
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+ *
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+# Copyright (c) 2020 Shanghai StarFive Technology Co., Ltd.
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+#
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+# Authors:
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+# StarFive <support@starfivetech.com>
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+ */
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+
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+#include <libfdt.h>
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+#include <sbi/riscv_asm.h>
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+#include <sbi/riscv_io.h>
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+#include <sbi/riscv_encoding.h>
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+#include <sbi/sbi_console.h>
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+#include <sbi/sbi_const.h>
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+#include <sbi/sbi_platform.h>
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+#include <sbi_utils/fdt/fdt_fixup.h>
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+#include <sbi_utils/irqchip/plic.h>
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+#include <sbi_utils/serial/uart8250.h>
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+#include <sbi_utils/sys/clint.h>
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+
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+/* clang-format off */
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+
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+#define VIC7100_HART_COUNT 2
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+
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+#define VIC7100_SYS_CLK 1000000000
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+
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+#define VIC7100_CLINT_ADDR 0x2000000
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+
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+#define VIC7100_PLIC_ADDR 0xc000000
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+#define VIC7100_PLIC_NUM_SOURCES 0x35
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+#define VIC7100_PLIC_NUM_PRIORITIES 7
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+
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+#define VIC7100_UART0_ADDR 0x12440000
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+#define VIC7100_UART_BAUDRATE 115200
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+#define VIC7100_UART_REG_SHIFT 2
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+#define VIC7100_UART_REG_WIDTH 4
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+
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+/* PRCI clock related macros */
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+//TODO: Do we need a separate driver for this ?
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+#define VIC7100_PRCI_BASE_ADDR 0x10000000
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+#define VIC7100_PRCI_CLKMUXSTATUSREG 0x002C
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+#define VIC7100_PRCI_CLKMUX_STATUS_TLCLKSEL (0x1 << 1)
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+
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+/* Full tlb flush always */
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+#define VIC7100_TLB_RANGE_FLUSH_LIMIT 0
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+
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+/* clang-format on */
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+
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+static struct plic_data plic = {
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+ .addr = VIC7100_PLIC_ADDR,
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+ .num_src = VIC7100_PLIC_NUM_SOURCES,
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+};
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+
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+static struct clint_data clint = {
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+ .addr = VIC7100_CLINT_ADDR,
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+ .first_hartid = 0,
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+ .hart_count = VIC7100_HART_COUNT,
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+ .has_64bit_mmio = TRUE,
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+};
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+
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+static void vic7100_modify_dt(void *fdt)
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+{
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+ fdt_cpu_fixup(fdt);
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+
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+ fdt_fixups(fdt);
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+
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+ /*
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+ * SiFive Freedom U540 has an erratum that prevents S-mode software
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+ * to access a PMP protected region using 1GB page table mapping, so
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+ * always add the no-map attribute on this platform.
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+ */
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+ fdt_reserved_memory_nomap_fixup(fdt);
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+}
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+
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+static int vic7100_final_init(bool cold_boot)
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+{
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+ void *fdt;
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+
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+ if (!cold_boot)
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+ return 0;
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+
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+ fdt = sbi_scratch_thishart_arg1_ptr();
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+ vic7100_modify_dt(fdt);
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+
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+ return 0;
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+}
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+
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+static int vic7100_console_init(void)
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+{
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+ unsigned long peri_in_freq;
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+
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+ if (readl((volatile void *)VIC7100_PRCI_BASE_ADDR +
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+ VIC7100_PRCI_CLKMUXSTATUSREG) &
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+ VIC7100_PRCI_CLKMUX_STATUS_TLCLKSEL) {
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+ peri_in_freq = VIC7100_SYS_CLK;
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+ } else {
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+ peri_in_freq = VIC7100_SYS_CLK / 10;
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+ }
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+
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+ return uart8250_init(VIC7100_UART0_ADDR, peri_in_freq,
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+ VIC7100_UART_BAUDRATE,
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+ VIC7100_UART_REG_SHIFT, VIC7100_UART_REG_WIDTH);
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+}
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+
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+static int vic7100_irqchip_init(bool cold_boot)
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+{
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+ int rc;
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+ u32 hartid = current_hartid();
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+
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+ if (cold_boot) {
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+ rc = plic_cold_irqchip_init(&plic);
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+ if (rc)
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+ return rc;
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+ }
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+
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+ return plic_warm_irqchip_init(&plic, (hartid) ? (2 * hartid - 1) : 0,
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+ (hartid) ? (2 * hartid) : -1);
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+}
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+
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+static int vic7100_ipi_init(bool cold_boot)
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+{
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+ int rc;
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+
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+ if (cold_boot) {
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+ rc = clint_cold_ipi_init(&clint);
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+ if (rc)
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+ return rc;
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+ }
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+
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+ return clint_warm_ipi_init();
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+}
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+
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+static u64 vic7100_get_tlbr_flush_limit(void)
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+{
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+ return VIC7100_TLB_RANGE_FLUSH_LIMIT;
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+}
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+
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+static int vic7100_timer_init(bool cold_boot)
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+{
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+ int rc;
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+
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+ if (cold_boot) {
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+ rc = clint_cold_timer_init(&clint, NULL);
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+ if (rc)
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+ return rc;
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+ }
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+
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+ return clint_warm_timer_init();
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+}
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+
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+const struct sbi_platform_operations platform_ops = {
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+ .final_init = vic7100_final_init,
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+ .console_putc = uart8250_putc,
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+ .console_getc = uart8250_getc,
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+ .console_init = vic7100_console_init,
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+ .irqchip_init = vic7100_irqchip_init,
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+ .ipi_send = clint_ipi_send,
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+ .ipi_clear = clint_ipi_clear,
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+ .ipi_init = vic7100_ipi_init,
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+ .get_tlbr_flush_limit = vic7100_get_tlbr_flush_limit,
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+ .timer_value = clint_timer_value,
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+ .timer_event_stop = clint_timer_event_stop,
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+ .timer_event_start = clint_timer_event_start,
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+ .timer_init = vic7100_timer_init,
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+};
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+
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+const struct sbi_platform platform = {
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+ .opensbi_version = OPENSBI_VERSION,
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+ .platform_version = SBI_PLATFORM_VERSION(0x0, 0x01),
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+ .name = "StarFive VIC7100",
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+ .features = SBI_PLATFORM_DEFAULT_FEATURES,
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+ .hart_count = (VIC7100_HART_COUNT),
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+ .hart_stack_size = SBI_PLATFORM_DEFAULT_HART_STACK_SIZE,
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+ .platform_ops_addr = (unsigned long)&platform_ops
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+};
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