separate source into kernel/ user/ mkfs/

1 files changed, 0 insertions, 75 deletions

diff --git a/uart.c b/uart.c
deleted file mode 100644
index 35fac1b..0000000
--- a/uart.c
+++ /dev/null
@@ -1,75 +0,0 @@
-#include "types.h"
-#include "param.h"
-#include "memlayout.h"
-#include "riscv.h"
-#include "proc.h"
-#include "spinlock.h"
-#include "defs.h"
-
-//
-// qemu -machine virt has a 16550a UART
-// qemu/hw/riscv/virt.c
-// http://byterunner.com/16550.html
-//
-// caller should lock.
-//
-
-// address of one of the registers
-#define R(reg) ((volatile unsigned char *)(UART0 + reg))
-
-void
-uartinit(void)
-{
-  // disable interrupts -- IER
-  *R(1) = 0x00;
-
-  // special mode to set baud rate
-  *R(3) = 0x80;
-
-  // LSB for baud rate of 38.4K
-  *R(0) = 0x03;
-
-  // MSB for baud rate of 38.4K
-  *R(1) = 0x00;
-
-  // leave set-baud mode,
-  // and set word length to 8 bits, no parity.
-  *R(3) = 0x03;
-
-  // reset and enable FIFOs -- FCR.
-  *R(2) = 0x07;
-
-  // enable receive interrupts -- IER.
-  *R(1) = 0x01;
-}
-
-void
-uartputc(int c)
-{
-  // wait for Transmit Holding Empty to be set in LSR.
-  while((*R(5) & (1 << 5)) == 0)
-    ;
-  *R(0) = c;
-}
-
-int
-uartgetc(void)
-{
-  if(*R(5) & 0x01){
-    // input data is ready.
-    return *R(0);
-  } else {
-    return -1;
-  }
-}
-
-void
-uartintr(void)
-{
-  while(1){
-    int c = uartgetc();
-    if(c == -1)
-      break;
-    consoleintr(c);
-  }
-}