arch/x86_64/sys/serial.c


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#include "jove.h"
#include "lib/printf.h"
#include "syscall.h"
#include "arch/x86_64/hal/serial_com.h"

static int
s_syscall_serial_write(
        jove_owned_obj_t *serial_com,
        size_t payload_bytes,
        void *payload_data)
{
    if(payload_bytes < sizeof(struct syscall_serial_write)) {
        kprintf("syscall_serial_write: message is too small for this syscall!\n");
        return EOOB;
    }
    struct syscall_serial_write *payload = payload_data;
    if(payload_bytes < sizeof(struct syscall_serial_write) + payload->len) {
        kprintf("syscall_serial_write: message is to small for payload!\n");
        return EOOB;
    }
    return serial_com_write(serial_com, payload->data, payload->len);
}

int
_syscall_handle_serial(
        jove_owned_obj_t *pcb_obj,
        jove_owned_obj_t *objdir,
        jove_owned_obj_t *message_obj,
        jove_owned_obj_t *target_obj,
        struct syscall_header *header,
        size_t bytes_left,
        void *payload_data)
{
    switch(header->callid) {
        case 0:
            return s_syscall_serial_write(target_obj, bytes_left, payload_data);
        default:
            kprintf("syscall_serial: serial com object does not support syscall %i\n", header->callid);
            return EOOB;
    }
}