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- /*
- * SPDX-License-Identifier: BSD-2-Clause
- *
- * Copyright (c) 2019 Western Digital Corporation or its affiliates.
- *
- * Authors:
- * Atish Patra <atish.patra@wdc.com>
- */
- #include <libfdt.h>
- #include <sbi/riscv_asm.h>
- #include <sbi/riscv_io.h>
- #include <sbi/riscv_encoding.h>
- #include <sbi/sbi_console.h>
- #include <sbi/sbi_const.h>
- #include <sbi/sbi_platform.h>
- #include <sbi_utils/fdt/fdt_fixup.h>
- #include <sbi_utils/irqchip/plic.h>
- #include <sbi_utils/serial/sifive-uart.h>
- #include <sbi_utils/sys/clint.h>
- /* clang-format off */
- #define FU540_HART_COUNT 5
- #define FU540_SYS_CLK 1000000000
- #define FU540_CLINT_ADDR 0x2000000
- #define FU540_PLIC_ADDR 0xc000000
- #define FU540_PLIC_NUM_SOURCES 0x35
- #define FU540_PLIC_NUM_PRIORITIES 7
- #define FU540_UART0_ADDR 0x10010000
- #define FU540_UART1_ADDR 0x10011000
- #define FU540_UART_BAUDRATE 115200
- /* PRCI clock related macros */
- //TODO: Do we need a separate driver for this ?
- #define FU540_PRCI_BASE_ADDR 0x10000000
- #define FU540_PRCI_CLKMUXSTATUSREG 0x002C
- #define FU540_PRCI_CLKMUX_STATUS_TLCLKSEL (0x1 << 1)
- /* Full tlb flush always */
- #define FU540_TLB_RANGE_FLUSH_LIMIT 0
- /* clang-format on */
- static struct plic_data plic = {
- .addr = FU540_PLIC_ADDR,
- .num_src = FU540_PLIC_NUM_SOURCES,
- };
- static struct clint_data clint = {
- .addr = FU540_CLINT_ADDR,
- .first_hartid = 0,
- .hart_count = FU540_HART_COUNT,
- .has_64bit_mmio = TRUE,
- };
- static void fu540_modify_dt(void *fdt)
- {
- fdt_cpu_fixup(fdt);
- fdt_fixups(fdt);
- /*
- * SiFive Freedom U540 has an erratum that prevents S-mode software
- * to access a PMP protected region using 1GB page table mapping, so
- * always add the no-map attribute on this platform.
- */
- fdt_reserved_memory_nomap_fixup(fdt);
- }
- static int fu540_final_init(bool cold_boot)
- {
- void *fdt;
- if (!cold_boot)
- return 0;
- fdt = sbi_scratch_thishart_arg1_ptr();
- fu540_modify_dt(fdt);
- return 0;
- }
- static int fu540_console_init(void)
- {
- unsigned long peri_in_freq;
- if (readl((volatile void *)FU540_PRCI_BASE_ADDR +
- FU540_PRCI_CLKMUXSTATUSREG) &
- FU540_PRCI_CLKMUX_STATUS_TLCLKSEL) {
- peri_in_freq = FU540_SYS_CLK;
- } else {
- peri_in_freq = FU540_SYS_CLK / 2;
- }
- return sifive_uart_init(FU540_UART0_ADDR, peri_in_freq,
- FU540_UART_BAUDRATE);
- }
- static int fu540_irqchip_init(bool cold_boot)
- {
- int rc;
- u32 hartid = current_hartid();
- if (cold_boot) {
- rc = plic_cold_irqchip_init(&plic);
- if (rc)
- return rc;
- }
- return plic_warm_irqchip_init(&plic, (hartid) ? (2 * hartid - 1) : 0,
- (hartid) ? (2 * hartid) : -1);
- }
- static int fu540_ipi_init(bool cold_boot)
- {
- int rc;
- if (cold_boot) {
- rc = clint_cold_ipi_init(&clint);
- if (rc)
- return rc;
- }
- return clint_warm_ipi_init();
- }
- static u64 fu540_get_tlbr_flush_limit(void)
- {
- return FU540_TLB_RANGE_FLUSH_LIMIT;
- }
- static int fu540_timer_init(bool cold_boot)
- {
- int rc;
- if (cold_boot) {
- rc = clint_cold_timer_init(&clint, NULL);
- if (rc)
- return rc;
- }
- return clint_warm_timer_init();
- }
- static u32 fu540_hart_index2id[FU540_HART_COUNT - 1] = {
- [0] = 1,
- [1] = 2,
- [2] = 3,
- [3] = 4,
- };
- const struct sbi_platform_operations platform_ops = {
- .final_init = fu540_final_init,
- .console_init = fu540_console_init,
- .irqchip_init = fu540_irqchip_init,
- .ipi_init = fu540_ipi_init,
- .get_tlbr_flush_limit = fu540_get_tlbr_flush_limit,
- .timer_init = fu540_timer_init,
- };
- const struct sbi_platform platform = {
- .opensbi_version = OPENSBI_VERSION,
- .platform_version = SBI_PLATFORM_VERSION(0x0, 0x01),
- .name = "SiFive Freedom U540",
- .features = SBI_PLATFORM_DEFAULT_FEATURES,
- .hart_count = (FU540_HART_COUNT - 1),
- .hart_index2id = fu540_hart_index2id,
- .hart_stack_size = SBI_PLATFORM_DEFAULT_HART_STACK_SIZE,
- .platform_ops_addr = (unsigned long)&platform_ops
- };
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