forked from M-Labs/artiq
40 lines
1.0 KiB
Rust
40 lines
1.0 KiB
Rust
use core::ptr;
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use board::csr;
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use mailbox;
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use rpc_queue;
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use kernel_proto::{KERNELCPU_EXEC_ADDRESS, KERNELCPU_LAST_ADDRESS, KSUPPORT_HEADER_SIZE};
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pub unsafe fn start() {
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if csr::kernel_cpu::reset_read() == 0 {
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panic!("attempted to start kernel CPU when it is already running")
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}
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stop();
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extern {
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static _binary_ksupport_elf_start: u8;
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static _binary_ksupport_elf_end: u8;
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}
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let ksupport_start = &_binary_ksupport_elf_start as *const _;
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let ksupport_end = &_binary_ksupport_elf_end as *const _;
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ptr::copy_nonoverlapping(ksupport_start,
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(KERNELCPU_EXEC_ADDRESS - KSUPPORT_HEADER_SIZE) as *mut u8,
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ksupport_end as usize - ksupport_start as usize);
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csr::kernel_cpu::reset_write(0);
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rpc_queue::init();
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}
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pub unsafe fn stop() {
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csr::kernel_cpu::reset_write(1);
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mailbox::acknowledge();
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rpc_queue::init();
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}
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pub fn validate(ptr: usize) -> bool {
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ptr >= KERNELCPU_EXEC_ADDRESS && ptr <= KERNELCPU_LAST_ADDRESS
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}
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