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- /* SPDX-License-Identifier: BSD-2-Clause */
- /*
- * Copyright (C) 2019 FORTH-ICS/CARV
- * Panagiotis Peristerakis <perister@ics.forth.gr>
- */
- #include <sbi/riscv_asm.h>
- #include <sbi/riscv_encoding.h>
- #include <sbi/riscv_io.h>
- #include <sbi/sbi_console.h>
- #include <sbi/sbi_const.h>
- #include <sbi/sbi_hart.h>
- #include <sbi/sbi_platform.h>
- #include <sbi_utils/fdt/fdt_fixup.h>
- #include <sbi_utils/irqchip/plic.h>
- #include <sbi_utils/serial/uart8250.h>
- #include <sbi_utils/sys/clint.h>
- #define ARIANE_UART_ADDR 0x10000000
- #define ARIANE_UART_FREQ 50000000
- #define ARIANE_UART_BAUDRATE 115200
- #define ARIANE_UART_REG_SHIFT 2
- #define ARIANE_UART_REG_WIDTH 4
- #define ARIANE_PLIC_ADDR 0xc000000
- #define ARIANE_PLIC_NUM_SOURCES 3
- #define ARIANE_HART_COUNT 1
- #define ARIANE_CLINT_ADDR 0x2000000
- static struct plic_data plic = {
- .addr = ARIANE_PLIC_ADDR,
- .num_src = ARIANE_PLIC_NUM_SOURCES,
- };
- static struct clint_data clint = {
- .addr = ARIANE_CLINT_ADDR,
- .first_hartid = 0,
- .hart_count = ARIANE_HART_COUNT,
- .has_64bit_mmio = TRUE,
- };
- /*
- * Ariane platform early initialization.
- */
- static int ariane_early_init(bool cold_boot)
- {
- /* For now nothing to do. */
- return 0;
- }
- /*
- * Ariane platform final initialization.
- */
- static int ariane_final_init(bool cold_boot)
- {
- void *fdt;
- if (!cold_boot)
- return 0;
- fdt = sbi_scratch_thishart_arg1_ptr();
- fdt_fixups(fdt);
- return 0;
- }
- /*
- * Initialize the ariane console.
- */
- static int ariane_console_init(void)
- {
- return uart8250_init(ARIANE_UART_ADDR,
- ARIANE_UART_FREQ,
- ARIANE_UART_BAUDRATE,
- ARIANE_UART_REG_SHIFT,
- ARIANE_UART_REG_WIDTH);
- }
- static int plic_ariane_warm_irqchip_init(int m_cntx_id, int s_cntx_id)
- {
- size_t i, ie_words = ARIANE_PLIC_NUM_SOURCES / 32 + 1;
- /* By default, enable all IRQs for M-mode of target HART */
- if (m_cntx_id > -1) {
- for (i = 0; i < ie_words; i++)
- plic_set_ie(&plic, m_cntx_id, i, 1);
- }
- /* Enable all IRQs for S-mode of target HART */
- if (s_cntx_id > -1) {
- for (i = 0; i < ie_words; i++)
- plic_set_ie(&plic, s_cntx_id, i, 1);
- }
- /* By default, enable M-mode threshold */
- if (m_cntx_id > -1)
- plic_set_thresh(&plic, m_cntx_id, 1);
- /* By default, disable S-mode threshold */
- if (s_cntx_id > -1)
- plic_set_thresh(&plic, s_cntx_id, 0);
- return 0;
- }
- /*
- * Initialize the ariane interrupt controller for current HART.
- */
- static int ariane_irqchip_init(bool cold_boot)
- {
- u32 hartid = current_hartid();
- int ret;
- if (cold_boot) {
- ret = plic_cold_irqchip_init(&plic);
- if (ret)
- return ret;
- }
- return plic_ariane_warm_irqchip_init(2 * hartid, 2 * hartid + 1);
- }
- /*
- * Initialize IPI for current HART.
- */
- static int ariane_ipi_init(bool cold_boot)
- {
- int ret;
- if (cold_boot) {
- ret = clint_cold_ipi_init(&clint);
- if (ret)
- return ret;
- }
- return clint_warm_ipi_init();
- }
- /*
- * Initialize ariane timer for current HART.
- */
- static int ariane_timer_init(bool cold_boot)
- {
- int ret;
- if (cold_boot) {
- ret = clint_cold_timer_init(&clint, NULL);
- if (ret)
- return ret;
- }
- return clint_warm_timer_init();
- }
- /*
- * Platform descriptor.
- */
- const struct sbi_platform_operations platform_ops = {
- .early_init = ariane_early_init,
- .final_init = ariane_final_init,
- .console_init = ariane_console_init,
- .irqchip_init = ariane_irqchip_init,
- .ipi_init = ariane_ipi_init,
- .timer_init = ariane_timer_init,
- };
- const struct sbi_platform platform = {
- .opensbi_version = OPENSBI_VERSION,
- .platform_version = SBI_PLATFORM_VERSION(0x0, 0x01),
- .name = "ARIANE RISC-V",
- .features = SBI_PLATFORM_DEFAULT_FEATURES,
- .hart_count = ARIANE_HART_COUNT,
- .hart_stack_size = SBI_PLATFORM_DEFAULT_HART_STACK_SIZE,
- .platform_ops_addr = (unsigned long)&platform_ops
- };
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