kernel/arch/riscv64/boot/
entry.rs

1use core::arch::naked_asm;
2
3use crate::{device::fdt::FdtManager, environment::STACK_SIZE, start_kernel};
4
5/// Entry point for the primary core
6#[unsafe(link_section = ".init")]
7#[unsafe(export_name = "_entry")]
8#[unsafe(naked)]
9pub extern "C" fn _entry() {
10    unsafe {
11        naked_asm!("
12        .option norvc
13        .option norelax
14        .align 8
15                // a0 = hartid     
16                li      t0, {}
17                mv      t1, a0
18                addi    t1, t1, 1
19                mul     t1, t1, a0          
20                la      sp, KERNEL_STACK
21                add     sp, sp, t0
22
23                j       arch_start_kernel
24        ", const STACK_SIZE
25        );
26    }
27}
28
29/// Entry point for the secondary cores
30#[unsafe(link_section = ".init")]
31#[unsafe(export_name = "_entry_ap")]
32#[unsafe(naked)]
33pub extern "C" fn _entry_ap() {
34    unsafe {
35        naked_asm!("
36        .option norvc
37        .option norelax
38        .align 8
39                // a0 = hartid     
40                li      t0, {}
41                mv      t1, a0
42                addi    t1, t1, 1
43                mul     t1, t1, a0          
44                la      sp, KERNEL_STACK
45                add     sp, sp, t0
46
47                j       start_ap
48        ", const STACK_SIZE
49        );
50    }
51}
52
53
54#[unsafe(no_mangle)]
55pub extern "C" fn arch_start_kernel(hartid: usize, fdt_ptr: usize) {
56    unsafe { 
57        FdtManager::set_fdt_addr(fdt_ptr);
58    }
59    start_kernel(hartid);
60}
kernel/arch/riscv64/boot/entry.rs

kernel/arch/riscv64/boot/
entry.rs
