forked from AbleOS/ableos
47 lines
792 B
Rust
47 lines
792 B
Rust
pub mod drivers;
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pub mod init;
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#[naked]
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#[no_mangle]
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unsafe extern "C" fn _boot() -> ! {
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#[rustfmt::skip]
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asm!("
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csrw sie, zero
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csrci sstatus, 2
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.option push
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.option norelax
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lla gp, __global_pointer$
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.option pop
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lla sp, __tmp_stack_top
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lla t0, __bss_start
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lla t1, __bss_end
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1:
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beq t0, t1, 2f
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sd zero, (t0)
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addi t0, t0, 8
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j 1b
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2:
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j {}
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",
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sym _start, options(noreturn));
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}
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extern "C" fn _start() -> ! {
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let uart_data = 0x10000000 as *mut u8;
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for c in b"Hello, world!\n" {
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unsafe { uart_data.write_volatile(*c) };
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}
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sloop()
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}
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pub fn sloop() -> ! {
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loop {
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unsafe { asm!("nop") };
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}
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}
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