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authordzwdz2021-10-07 06:25:02 +0000
committerdzwdz2021-10-07 06:25:02 +0000
commitfbf6183ef8c9d49a14bd3ff01f378d67eaebc300 (patch)
tree13380aee9433d727aa66ba7b9580ed91a033414a
parent7e326b5039bff4d422f66bb8e51267f785193985 (diff)
kernel/i386: rename the port io functions with their bit length
-rw-r--r--src/kernel/arch/i386/ata.c14
-rw-r--r--src/kernel/arch/i386/port_io.h4
-rw-r--r--src/kernel/arch/i386/tty/serial.c28
3 files changed, 23 insertions, 23 deletions
diff --git a/src/kernel/arch/i386/ata.c b/src/kernel/arch/i386/ata.c
index 996fa3a..aaf05ff 100644
--- a/src/kernel/arch/i386/ata.c
+++ b/src/kernel/arch/i386/ata.c
@@ -24,7 +24,7 @@ static void ata_driveselect(int drive, int block) {
if (drive&1) // slave?
v |= 0x10; // set drive number bit
// TODO account for block
- port_outb(ata_iobase(drive) + DRV, v);
+ port_out8(ata_iobase(drive) + DRV, v);
}
static bool ata_identify(int drive) {
@@ -33,20 +33,20 @@ static bool ata_identify(int drive) {
ata_driveselect(drive, 0);
for (int i = 2; i < 6; i++)
- port_outb(iobase + i, 0);
- port_outb(iobase + CMD, 0xEC); // IDENTIFY
+ port_out8(iobase + i, 0);
+ port_out8(iobase + CMD, 0xEC); // IDENTIFY
- v = port_inb(iobase + STATUS);
+ v = port_in8(iobase + STATUS);
if (v == 0) return false; // nonexistent drive
- while (port_inb(iobase + STATUS) & 0x80);
+ while (port_in8(iobase + STATUS) & 0x80);
/* check for uncomformant devices, quit early */
- if (port_inb(iobase + LBAmid) || port_inb(iobase + LBAhi)) {
+ if (port_in8(iobase + LBAmid) || port_in8(iobase + LBAhi)) {
// TODO atapi
return true;
}
/* pool until bit 3 (DRQ) or 0 (ERR) is set */
- while (!((v = port_inb(iobase + STATUS) & 0x9)));
+ while (!((v = port_in8(iobase + STATUS) & 0x9)));
if (v & 1) return false; /* ERR was set, bail */
// now I can read 512 bytes of data, TODO
diff --git a/src/kernel/arch/i386/port_io.h b/src/kernel/arch/i386/port_io.h
index a4d640f..bcf2358 100644
--- a/src/kernel/arch/i386/port_io.h
+++ b/src/kernel/arch/i386/port_io.h
@@ -1,10 +1,10 @@
#include <stdint.h>
-static inline void port_outb(uint16_t port, uint8_t val) {
+static inline void port_out8(uint16_t port, uint8_t val) {
asm volatile("outb %0, %1" : : "a" (val), "Nd" (port));
}
-static inline uint8_t port_inb(uint16_t port) {
+static inline uint8_t port_in8(uint16_t port) {
uint8_t val;
asm volatile("inb %1, %0" : "=a" (val) : "Nd" (port));
return val;
diff --git a/src/kernel/arch/i386/tty/serial.c b/src/kernel/arch/i386/tty/serial.c
index 2b89ecf..f9bb252 100644
--- a/src/kernel/arch/i386/tty/serial.c
+++ b/src/kernel/arch/i386/tty/serial.c
@@ -7,37 +7,37 @@ static const int COM1 = 0x3f8;
static void serial_selftest(void) {
char b = 0x69;
- port_outb(COM1 + 4, 0b00011110); // enable loopback mode
- port_outb(COM1, b);
- assert(port_inb(COM1) == b);
+ port_out8(COM1 + 4, 0b00011110); // enable loopback mode
+ port_out8(COM1, b);
+ assert(port_in8(COM1) == b);
}
void serial_init(void) {
// see https://www.sci.muni.cz/docs/pc/serport.txt
- port_outb(COM1 + 1, 0x00); // disable interrupts, we won't be using them
+ port_out8(COM1 + 1, 0x00); // disable interrupts, we won't be using them
// set baud rate divisor
- port_outb(COM1 + 3, 0b10000000); // enable DLAB
- port_outb(COM1 + 0, 0x01); // divisor = 1 (low byte)
- port_outb(COM1 + 1, 0x00); // (high byte)
+ port_out8(COM1 + 3, 0b10000000); // enable DLAB
+ port_out8(COM1 + 0, 0x01); // divisor = 1 (low byte)
+ port_out8(COM1 + 1, 0x00); // (high byte)
- port_outb(COM1 + 3, 0b00000011); // 8 bits, no parity, one stop bit
- port_outb(COM1 + 2, 0b11000111); // enable FIFO with 14-bit trigger level (???)
+ port_out8(COM1 + 3, 0b00000011); // 8 bits, no parity, one stop bit
+ port_out8(COM1 + 2, 0b11000111); // enable FIFO with 14-bit trigger level (???)
serial_selftest();
- port_outb(COM1 + 4, 0b00001111); // enable everything in the MCR
+ port_out8(COM1 + 4, 0b00001111); // enable everything in the MCR
}
static void serial_putchar(char c) {
- while ((port_inb(COM1 + 5) & 0x20) == 0); // wait for THRE
- port_outb(COM1, c);
+ while ((port_in8(COM1 + 5) & 0x20) == 0); // wait for THRE
+ port_out8(COM1, c);
}
char serial_read(void) {
- while ((port_inb(COM1 + 5) & 0x01) == 0); // wait for DR
- return port_inb(COM1);
+ while ((port_in8(COM1 + 5) & 0x01) == 0); // wait for DR
+ return port_in8(COM1);
}
void serial_write(const char *buf, size_t len) {