forked from Mirrors/opensbi
72a0628c7e
As of today all platforms use 8KB of per-HART stack hence there is no need for each platform to define its own macro or use the magic number. Create one macro for all platforms. Platform still can use its own version if needed. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Anup Patel <anup.patel@wdc.com>
164 lines
3.4 KiB
C
164 lines
3.4 KiB
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2019 Western Digital Corporation or its affiliates.
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*
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* Authors:
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* Anup Patel <anup.patel@wdc.com>
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* Nick Kossifidis <mick@ics.forth.gr>
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*/
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#include <sbi/riscv_asm.h>
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#include <sbi/riscv_encoding.h>
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#include <sbi/riscv_io.h>
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#include <sbi/sbi_const.h>
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#include <sbi/sbi_hart.h>
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#include <sbi/sbi_platform.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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/* clang-format off */
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#define VIRT_HART_COUNT 8
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#define VIRT_TEST_ADDR 0x100000
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#define VIRT_TEST_FINISHER_FAIL 0x3333
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#define VIRT_TEST_FINISHER_PASS 0x5555
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#define VIRT_CLINT_ADDR 0x2000000
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#define VIRT_PLIC_ADDR 0xc000000
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#define VIRT_PLIC_NUM_SOURCES 127
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#define VIRT_PLIC_NUM_PRIORITIES 7
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#define VIRT_UART16550_ADDR 0x10000000
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#define VIRT_UART_BAUDRATE 115200
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#define VIRT_UART_SHIFTREG_ADDR 1843200
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/* clang-format on */
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static int virt_final_init(bool cold_boot)
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{
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void *fdt;
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if (!cold_boot)
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return 0;
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fdt = sbi_scratch_thishart_arg1_ptr();
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plic_fdt_fixup(fdt, "riscv,plic0");
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return 0;
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}
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static u32 virt_pmp_region_count(u32 hartid)
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{
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return 1;
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}
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static int virt_pmp_region_info(u32 hartid, u32 index, ulong *prot, ulong *addr,
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ulong *log2size)
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{
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int ret = 0;
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switch (index) {
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case 0:
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*prot = PMP_R | PMP_W | PMP_X;
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*addr = 0;
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*log2size = __riscv_xlen;
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break;
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default:
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ret = -1;
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break;
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};
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return ret;
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}
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static int virt_console_init(void)
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{
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return uart8250_init(VIRT_UART16550_ADDR, VIRT_UART_SHIFTREG_ADDR,
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VIRT_UART_BAUDRATE, 0, 1);
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}
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static int virt_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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if (cold_boot) {
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rc = plic_cold_irqchip_init(
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VIRT_PLIC_ADDR, VIRT_PLIC_NUM_SOURCES, VIRT_HART_COUNT);
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if (rc)
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return rc;
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}
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return plic_warm_irqchip_init(hartid, (2 * hartid), (2 * hartid + 1));
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}
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static int virt_ipi_init(bool cold_boot)
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{
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int rc;
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if (cold_boot) {
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rc = clint_cold_ipi_init(VIRT_CLINT_ADDR, VIRT_HART_COUNT);
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if (rc)
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return rc;
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}
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return clint_warm_ipi_init();
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}
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static int virt_timer_init(bool cold_boot)
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{
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int rc;
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if (cold_boot) {
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rc = clint_cold_timer_init(VIRT_CLINT_ADDR,
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VIRT_HART_COUNT, TRUE);
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if (rc)
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return rc;
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}
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return clint_warm_timer_init();
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}
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static int virt_system_down(u32 type)
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{
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/* Tell the "finisher" that the simulation
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* was successful so that QEMU exits
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*/
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writew(VIRT_TEST_FINISHER_PASS, (void *)VIRT_TEST_ADDR);
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return 0;
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}
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const struct sbi_platform_operations platform_ops = {
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.pmp_region_count = virt_pmp_region_count,
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.pmp_region_info = virt_pmp_region_info,
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.final_init = virt_final_init,
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.console_putc = uart8250_putc,
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.console_getc = uart8250_getc,
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.console_init = virt_console_init,
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.irqchip_init = virt_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 = virt_ipi_init,
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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 = virt_timer_init,
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.system_reboot = virt_system_down,
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.system_shutdown = virt_system_down
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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 = "QEMU Virt Machine",
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.features = SBI_PLATFORM_DEFAULT_FEATURES,
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.hart_count = VIRT_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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