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From: Alexander Stein <alexander.stein@systec-electronic.com>
Date: Wed, 23 Nov 2011 16:30:13 +0100
Subject: [PATCH] Use serial port addresses provided by BIOS
Using this patch memtest86+ uses the serial port addresses provided by BIOS rather hardcoded defaults.
Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
---
lib.c | 4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/lib.c b/lib.c
index d107039..91ea950 100644
--- a/lib.c
+++ b/lib.c
@@ -24,7 +24,7 @@ short serial_cons = SERIAL_CONSOLE_DEFAULT;
#error Bad SERIAL_TTY. Only ttyS0 and ttyS1 are supported.
#endif
short serial_tty = SERIAL_TTY;
-const short serial_base_ports[] = {0x3f8, 0x2f8, 0x3e8, 0x2e8};
+unsigned short serial_base_ports[] = {0x3f8, 0x2f8, 0x3e8, 0x2e8};
#if ((115200%SERIAL_BAUD_RATE) != 0)
#error Bad default baud rate
@@ -1112,6 +1112,8 @@ void serial_console_setup(char *param)
serial_baud_rate = (int) baud_rate;
save_tty:
serial_tty = (short) tty;
+ /* fetch I/O port address from BIOS data area */
+ serial_base_ports[serial_tty] = ((const unsigned short *) 0x0400)[serial_tty];
serial_cons = 1;
}
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