diff options
Diffstat (limited to 'drivers/console/console.S')
| -rw-r--r-- | drivers/console/console.S | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/console/console.S b/drivers/console/console.S index d966f0d3..40a6db9f 100644 --- a/drivers/console/console.S +++ b/drivers/console/console.S @@ -30,6 +30,7 @@ #include <asm_macros.S> .globl console_init + .globl console_uninit .globl console_putc .globl console_getc @@ -66,6 +67,20 @@ init_fail: ret endfunc console_init + /* ----------------------------------------------- + * void console_uninit(void) + * Function to finish the use of console driver. + * It sets the console_base as NULL so that any + * further invocation of `console_putc` or + * `console_getc` APIs would return error. + * ----------------------------------------------- + */ +func console_uninit + mov x0, #0 + adrp x3, console_base + str x0, [x3, :lo12:console_base] +endfunc console_uninit + /* --------------------------------------------- * int console_putc(int c) * Function to output a character over the |