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- /*
- * SPDX-License-Identifier: BSD-2-Clause
- *
- * Copyright (c) 2019 Western Digital Corporation or its affiliates.
- *
- * Authors:
- * Damien Le Moal <damien.lemoal@wdc.com>
- */
- #include <sbi/riscv_asm.h>
- #include <sbi/riscv_encoding.h>
- #include <sbi/sbi_console.h>
- #include <sbi/sbi_const.h>
- #include <sbi/sbi_platform.h>
- #include <sbi/sbi_system.h>
- #include <sbi_utils/fdt/fdt_helper.h>
- #include <sbi_utils/fdt/fdt_fixup.h>
- #include <sbi_utils/ipi/aclint_mswi.h>
- #include <sbi_utils/irqchip/plic.h>
- #include <sbi_utils/serial/sifive-uart.h>
- #include <sbi_utils/timer/aclint_mtimer.h>
- #include "platform.h"
- extern const char dt_k210_start[];
- unsigned long fw_platform_init(unsigned long arg0, unsigned long arg1,
- unsigned long arg2, unsigned long arg3,
- unsigned long arg4)
- {
- return (unsigned long)&dt_k210_start[0];
- }
- static struct plic_data plic = {
- .addr = K210_PLIC_BASE_ADDR,
- .num_src = K210_PLIC_NUM_SOURCES,
- };
- static struct aclint_mswi_data mswi = {
- .addr = K210_ACLINT_MSWI_ADDR,
- .size = ACLINT_MSWI_SIZE,
- .first_hartid = 0,
- .hart_count = K210_HART_COUNT,
- };
- static struct aclint_mtimer_data mtimer = {
- .mtime_freq = K210_ACLINT_MTIMER_FREQ,
- .mtime_addr = K210_ACLINT_MTIMER_ADDR +
- ACLINT_DEFAULT_MTIME_OFFSET,
- .mtime_size = ACLINT_DEFAULT_MTIME_SIZE,
- .mtimecmp_addr = K210_ACLINT_MTIMER_ADDR +
- ACLINT_DEFAULT_MTIMECMP_OFFSET,
- .mtimecmp_size = ACLINT_DEFAULT_MTIMECMP_SIZE,
- .first_hartid = 0,
- .hart_count = K210_HART_COUNT,
- .has_64bit_mmio = true,
- };
- static u32 k210_get_clk_freq(void)
- {
- u32 clksel0, pll0;
- u64 pll0_freq, clkr0, clkf0, clkod0, div;
- /*
- * If the clock selector is not set, use the base frequency.
- * Otherwise, use PLL0 frequency with a frequency divisor.
- */
- clksel0 = k210_read_sysreg(K210_CLKSEL0);
- if (!(clksel0 & 0x1))
- return K210_CLK0_FREQ;
- /*
- * Get PLL0 frequency:
- * freq = base frequency * clkf0 / (clkr0 * clkod0)
- */
- pll0 = k210_read_sysreg(K210_PLL0);
- clkr0 = 1 + (pll0 & 0x0000000f);
- clkf0 = 1 + ((pll0 & 0x000003f0) >> 4);
- clkod0 = 1 + ((pll0 & 0x00003c00) >> 10);
- pll0_freq = clkf0 * K210_CLK0_FREQ / (clkr0 * clkod0);
- /* Get the frequency divisor from the clock selector */
- div = 2ULL << ((clksel0 & 0x00000006) >> 1);
- return pll0_freq / div;
- }
- static int k210_system_reset_check(u32 type, u32 reason)
- {
- return 1;
- }
- static void k210_system_reset(u32 type, u32 reason)
- {
- u32 val;
- val = k210_read_sysreg(K210_RESET);
- val |= K210_RESET_MASK;
- k210_write_sysreg(val, K210_RESET);
- while (1);
- }
- static struct sbi_system_reset_device k210_reset = {
- .name = "kendryte_k210_reset",
- .system_reset_check = k210_system_reset_check,
- .system_reset = k210_system_reset
- };
- static int k210_early_init(bool cold_boot)
- {
- if (cold_boot)
- sbi_system_reset_add_device(&k210_reset);
- return 0;
- }
- static int k210_final_init(bool cold_boot)
- {
- void *fdt;
- if (!cold_boot)
- return 0;
- fdt = fdt_get_address();
- fdt_cpu_fixup(fdt);
- fdt_fixups(fdt);
- return 0;
- }
- static int k210_console_init(void)
- {
- return sifive_uart_init(K210_UART_BASE_ADDR, k210_get_clk_freq(),
- K210_UART_BAUDRATE);
- }
- static int k210_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 * 2 + 1);
- }
- static int k210_ipi_init(bool cold_boot)
- {
- int rc;
- if (cold_boot) {
- rc = aclint_mswi_cold_init(&mswi);
- if (rc)
- return rc;
- }
- return aclint_mswi_warm_init();
- }
- static int k210_timer_init(bool cold_boot)
- {
- int rc;
- if (cold_boot) {
- rc = aclint_mtimer_cold_init(&mtimer, NULL);
- if (rc)
- return rc;
- }
- return aclint_mtimer_warm_init();
- }
- const struct sbi_platform_operations platform_ops = {
- .early_init = k210_early_init,
- .final_init = k210_final_init,
- .console_init = k210_console_init,
- .irqchip_init = k210_irqchip_init,
- .ipi_init = k210_ipi_init,
- .timer_init = k210_timer_init,
- };
- const struct sbi_platform platform = {
- .opensbi_version = OPENSBI_VERSION,
- .platform_version = SBI_PLATFORM_VERSION(0x0, 0x01),
- .name = "Kendryte K210",
- .features = 0,
- .hart_count = K210_HART_COUNT,
- .hart_stack_size = SBI_PLATFORM_DEFAULT_HART_STACK_SIZE,
- .platform_ops_addr = (unsigned long)&platform_ops
- };
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