I have images that boot under qemu-system-sh4 at:
http://landley.net/aboriginal/bin/system-image-sh4.tar.bz2
But in order to get them to work with current kernels, I have to apply
the attached sh4.patch to qemu.
What I did with earlier kernels was apply the attached
linux-fixsh4-2.patch but more recent kernels added another access to
the same register somewhere and the proper fix is for qemu to ignore it
(it's a NOP) rather than exiting the emulator.
Rob
diff --git a/hw/char/sh_serial.c b/hw/char/sh_serial.c
index b328643..81d374a 100644
--- a/hw/char/sh_serial.c
+++ b/hw/char/sh_serial.c
@@ -248,11 +248,9 @@ static uint64_t sh_serial_read(void *opaque, hwaddr offs,
s->flags &= ~SH_SERIAL_FLAG_RDF;
}
break;
-#if 0
case 0x18:
ret = s->fcr;
break;
-#endif
case 0x1c:
ret = s->rx_cnt;
break;
This is "the wrong fix". The correct fix is to qemu (take out the "#ifdef 0"
around the 0x18 case in hw/sh_serial.c line 250 or so, or just don't
abort() on unknown register reads), and I pinged the qemu
mailing list about that, but this works with existing qemu releases.
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 1bd9163..fa043f1 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -1879,7 +1879,7 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
sci_init_pins(port, termios->c_cflag);
- reg = sci_getreg(port, SCFCR);
+ reg = sci_getreg(port, 0x30);
if (reg->size) {
unsigned short ctrl = serial_port_in(port, SCFCR);
