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/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2019 Western Digital Corporation or its affiliates.
*/
#include <sbi/riscv_asm.h>
#include <sbi/riscv_encoding.h>
#include <sbi/sbi_const.h>
#include <sbi/sbi_platform.h>
/*
* Include these files as needed.
* See config.mk PLATFORM_xxx configuration parameters.
*/
#include <sbi_utils/irqchip/plic.h>
#include <sbi_utils/serial/uart8250.h>
#include <sbi_utils/sys/clint.h>
#define PLATFORM_PLIC_ADDR 0xc000000
#define PLATFORM_PLIC_NUM_SOURCES 128
#define PLATFORM_HART_COUNT 4
#define PLATFORM_CLINT_ADDR 0x2000000
#define PLATFORM_UART_ADDR 0x09000000
#define PLATFORM_UART_INPUT_FREQ 10000000
#define PLATFORM_UART_BAUDRATE 115200
static struct plic_data plic = {
.addr = PLATFORM_PLIC_ADDR,
.num_src = PLATFORM_PLIC_NUM_SOURCES,
};
static struct clint_data clint = {
.addr = PLATFORM_CLINT_ADDR,
.first_hartid = 0,
.hart_count = PLATFORM_HART_COUNT,
.has_64bit_mmio = TRUE,
};
/*
* Platform early initialization.
*/
static int platform_early_init(bool cold_boot)
{
return 0;
}
/*
* Platform final initialization.
*/
static int platform_final_init(bool cold_boot)
{
return 0;
}
/*
* Initialize the platform console.
*/
static int platform_console_init(void)
{
/* Example if the generic UART8250 driver is used */
return uart8250_init(PLATFORM_UART_ADDR, PLATFORM_UART_INPUT_FREQ,
PLATFORM_UART_BAUDRATE, 0, 1);
}
/*
* Write a character to the platform console output.
*/
static void platform_console_putc(char ch)
{
/* Example if the generic UART8250 driver is used */
uart8250_putc(ch);
}
/*
* Read a character from the platform console input.
*/
static int platform_console_getc(void)
{
return uart8250_getc();
}
/*
* Initialize the platform interrupt controller for current HART.
*/
static int platform_irqchip_init(bool cold_boot)
{
u32 hartid = current_hartid();
int ret;
/* Example if the generic PLIC driver is used */
if (cold_boot) {
ret = plic_cold_irqchip_init(&plic);
if (ret)
return ret;
}
return plic_warm_irqchip_init(&plic, 2 * hartid, 2 * hartid + 1);
}
/*
* Initialize IPI for current HART.
*/
static int platform_ipi_init(bool cold_boot)
{
int ret;
/* Example if the generic CLINT driver is used */
if (cold_boot) {
ret = clint_cold_ipi_init(&clint, NULL);
if (ret)
return ret;
}
return clint_warm_ipi_init();
}
/*
* Send IPI to a target HART
*/
static void platform_ipi_send(u32 target_hart)
{
/* Example if the generic CLINT driver is used */
clint_ipi_send(target_hart);
}
/*
* Clear IPI for a target HART.
*/
static void platform_ipi_clear(u32 target_hart)
{
/* Example if the generic CLINT driver is used */
clint_ipi_clear(target_hart);
}
/*
* Initialize platform timer for current HART.
*/
static int platform_timer_init(bool cold_boot)
{
int ret;
/* Example if the generic CLINT driver is used */
if (cold_boot) {
ret = clint_cold_timer_init(&clint);
if (ret)
return ret;
}
return clint_warm_timer_init();
}
/*
* Get platform timer value.
*/
static u64 platform_timer_value(void)
{
/* Example if the generic CLINT driver is used */
return clint_timer_value();
}
/*
* Start platform timer event for current HART.
*/
static void platform_timer_event_start(u64 next_event)
{
/* Example if the generic CLINT driver is used */
clint_timer_event_start(next_event);
}
/*
* Stop platform timer event for current HART.
*/
static void platform_timer_event_stop(void)
{
/* Example if the generic CLINT driver is used */
clint_timer_event_stop();
}
/*
* Check reset type and reason supported by the platform.
*/
static int platform_system_reset_check(u32 type, u32 reason)
{
return 0;
}
/*
* Reset the platform.
*/
static void platform_system_reset(u32 type, u32 reason)
{
}
/*
* Platform descriptor.
*/
const struct sbi_platform_operations platform_ops = {
.early_init = platform_early_init,
.final_init = platform_final_init,
.console_putc = platform_console_putc,
.console_getc = platform_console_getc,
.console_init = platform_console_init,
.irqchip_init = platform_irqchip_init,
.ipi_send = platform_ipi_send,
.ipi_clear = platform_ipi_clear,
.ipi_init = platform_ipi_init,
.timer_value = platform_timer_value,
.timer_event_stop = platform_timer_event_stop,
.timer_event_start = platform_timer_event_start,
.timer_init = platform_timer_init,
.system_reset_check = platform_system_reset_check,
.system_reset = platform_system_reset
};
const struct sbi_platform platform = {
.opensbi_version = OPENSBI_VERSION,
.platform_version = SBI_PLATFORM_VERSION(0x0, 0x00),
.name = "platform-name",
.features = SBI_PLATFORM_DEFAULT_FEATURES,
.hart_count = 1,
.hart_stack_size = SBI_PLATFORM_DEFAULT_HART_STACK_SIZE,
.platform_ops_addr = (unsigned long)&platform_ops
};
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