diff options
author | Danny Holman <dholman@gymli.org> | 2024-02-16 12:35:04 -0600 |
---|---|---|
committer | Danny Holman <dholman@gymli.org> | 2024-02-16 12:35:04 -0600 |
commit | fa748f3e1c0b0571e2c53514a55794ca16d90b18 (patch) | |
tree | e722b4feae40dd020a63710c55b80fab0ea7bb82 /arch | |
parent | a267b8c076793cf59c2f6c80a31d7d094a215aab (diff) |
arch: i386: kernel: the serial driver should be more POSIX-y
Make the serial driver behave more like a standard POSIX call. It should
have write and read functions that call architecture specific functions.
Signed-off-by: Danny Holman <dholman@gymli.org>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/i386/kernel/serial.c | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/arch/i386/kernel/serial.c b/arch/i386/kernel/serial.c index 5bd4105..25a01fe 100644 --- a/arch/i386/kernel/serial.c +++ b/arch/i386/kernel/serial.c @@ -5,6 +5,14 @@ #define PORT 0x3f8 +static inline int _serial_received(void) { + return inb(PORT + 5) & 1; +} + +static inline int _is_transmit_empty(void) { + return inb(PORT + 5) & 0x20; +} + int serial_init(void) { outb(PORT + 1, 0x00); outb(PORT + 3, 0x80); @@ -23,20 +31,12 @@ int serial_init(void) { return 0; } -int serial_recieved(void) { - return inb(PORT + 5) & 1; +void serial_putchar(char c) { + while (_is_transmit_empty() == 0); + outb(PORT, c); } -char read_serial(void) { - while (serial_recieved() == 0); +char serial_getchar(void) { + while (_serial_received() == 0); return inb(PORT); } - -int is_transmit_empty(void) { - return inb(PORT + 5) & 0x20; -} - -void write_serial(char a) { - while (is_transmit_empty() == 0); - outb(PORT, a); -} |