genode/repos/base-okl4/patches/bda.patch
Norman Feske ca971bbfd8 Move repositories to 'repos/' subdirectory
This patch changes the top-level directory layout as a preparatory
step for improving the tools for managing 3rd-party source codes.
The rationale is described in the issue referenced below.

Issue #1082
2014-05-14 16:08:00 +02:00

60 lines
1.7 KiB
Diff

--- pistachio/platform/pc99/pistachio/kdb/io.cc 2013-06-10 11:34:34.607813369 +0200
+++ pistachio/platform/pc99/pistachio/kdb/io.cc 2013-06-10 11:32:02.607810593 +0200
@@ -336,16 +336,23 @@
#define COMPORT CONFIG_KDB_COMPORT
#define RATE CONFIG_KDB_COMSPEED
+static unsigned short comport = COMPORT;
+
void Platform::serial_init(void)
{
-#define IER (COMPORT+1)
-#define EIR (COMPORT+2)
-#define LCR (COMPORT+3)
-#define MCR (COMPORT+4)
-#define LSR (COMPORT+5)
-#define MSR (COMPORT+6)
-#define DLLO (COMPORT+0)
-#define DLHI (COMPORT+1)
+ /* read BDA region to obtain I/O ports of serial device */
+ unsigned short comport_count = (*((unsigned short *)0x410) >> 9) & 0x7;
+ if (comport_count)
+ comport = *((unsigned short *)0x400);
+
+#define IER (comport+1)
+#define EIR (comport+2)
+#define LCR (comport+3)
+#define MCR (comport+4)
+#define LSR (comport+5)
+#define MSR (comport+6)
+#define DLLO (comport+0)
+#define DLHI (comport+1)
out_u8(LCR, 0x80); /* select bank 1 */
for (volatile int i = 10000000; i--; );
@@ -367,8 +374,8 @@
void Platform::serial_putc(char c)
{
- while ((in_u8(COMPORT+5) & 0x60) == 0);
- out_u8(COMPORT,c);
+ while ((in_u8(comport+5) & 0x60) == 0);
+ out_u8(comport,c);
if (c == '\n')
Platform::serial_putc('\r');
@@ -376,11 +383,11 @@
int Platform::serial_getc(bool can_block)
{
- if ((in_u8(COMPORT+5) & 0x01) == 0)
+ if ((in_u8(comport+5) & 0x01) == 0)
{
return -1;
}
- return (int) in_u8(COMPORT);
+ return (int) in_u8(comport);
}
DECLARE_CMD (cmd_dumpvga, arch, 'V', "screendump", "dump VGA screen contents");