[OpenBIOS] [PATCH 3/3] ppc: enable basic PReP serial console

[Mark Cave-Ayland]

This patch follows on from the previous patchsets and provides a basic PReP
serial console when launched under QEMU with -nographic. This is done by
including the PC serial driver as part of the PPC binary build and setting
up a prep_console_ops structure for use when PReP architecture is detected.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland at ilande.co.uk>
CC: Andreas Färber <afaerber at suse.de>
CC: Hervé Poussineau <hpoussin at reactos.org>
---
 openbios-devel/arch/ppc/qemu/console.c        |   32 +++++++++++++++++++++++++
 openbios-devel/arch/ppc/qemu/init.c           |   28 ++++++++++++++++------
 openbios-devel/arch/ppc/qemu/main.c           |    5 +++-
 openbios-devel/config/examples/ppc_config.xml |    1 +
 4 files changed, 58 insertions(+), 8 deletions(-)

diff --git a/openbios-devel/arch/ppc/qemu/console.c b/openbios-devel/arch/ppc/qemu/console.c
index 25b21c0..53a3215 100644
--- a/openbios-devel/arch/ppc/qemu/console.c
+++ b/openbios-devel/arch/ppc/qemu/console.c
@@ -53,4 +53,36 @@ struct _console_ops mac_console_ops = {
 	.getchar = mac_getchar
 };
 
+static int prep_putchar(int c)
+{
+#ifdef CONFIG_DEBUG_CONSOLE_SERIAL
+	uart_putchar(c & 0xff);
+#endif
+        return c;
+}
+
+static int prep_availchar(void)
+{
+#ifdef CONFIG_DEBUG_CONSOLE_SERIAL
+	if (uart_charav(CONFIG_SERIAL_PORT))
+		return 1;
+#endif
+        return 0;
+}
+
+static int prep_getchar(void)
+{
+#ifdef CONFIG_DEBUG_CONSOLE_SERIAL
+	if (uart_charav(CONFIG_SERIAL_PORT))
+		return (uart_getchar(CONFIG_SERIAL_PORT));
+#endif
+        return 0;
+}
+
+struct _console_ops prep_console_ops = {
+	.putchar = prep_putchar,
+	.availchar = prep_availchar,
+	.getchar = prep_getchar
+};
+
 #endif	// CONFIG_DEBUG_CONSOLE
diff --git a/openbios-devel/arch/ppc/qemu/init.c b/openbios-devel/arch/ppc/qemu/init.c
index 48d39b6..4eb0f0e 100644
--- a/openbios-devel/arch/ppc/qemu/init.c
+++ b/openbios-devel/arch/ppc/qemu/init.c
@@ -163,7 +163,7 @@ static const pci_arch_t known_arch[] = {
 };
 unsigned long isa_io_base;
 
-extern struct _console_ops mac_console_ops;
+extern struct _console_ops mac_console_ops, prep_console_ops;
 
 void
 entry(void)
@@ -188,7 +188,11 @@ entry(void)
     isa_io_base = arch->io_base;
 
 #ifdef CONFIG_DEBUG_CONSOLE
-    init_console(mac_console_ops);
+    if (is_apple()) {
+        init_console(mac_console_ops);
+    } else {
+        init_console(prep_console_ops);
+    }
 #endif
 
     if (temp != 1) {
@@ -658,6 +662,11 @@ arch_of_init(void)
 
     ofmem_t *ofmem = ofmem_arch_get_private();
 
+    if (!is_apple()) {
+        /* Initialise PReP serial port */
+        ob_pc_serial_init("", "serial", arch->io_base, 0x3f8ULL, 0);
+    }
+
     openbios_init();
     modules_init();
     setup_timers();
@@ -823,12 +832,17 @@ arch_of_init(void)
 #endif
 
     if (fw_cfg_read_i16(FW_CFG_NOGRAPHIC)) {
-        if (CONFIG_SERIAL_PORT) {
-           stdin_path = "scca";
-           stdout_path = "scca";
+        if (is_apple()) {
+            if (CONFIG_SERIAL_PORT) {
+                stdin_path = "scca";
+                stdout_path = "scca";
+            } else {
+                stdin_path = "sccb";
+                stdout_path = "sccb";
+            }
         } else {
-           stdin_path = "sccb";
-           stdout_path = "sccb";
+            stdin_path = "/serial";
+            stdout_path = "/serial";
         }
 
         /* Some bootloaders force the output to the screen device, so
diff --git a/openbios-devel/arch/ppc/qemu/main.c b/openbios-devel/arch/ppc/qemu/main.c
index 30a4375..44b1666 100644
--- a/openbios-devel/arch/ppc/qemu/main.c
+++ b/openbios-devel/arch/ppc/qemu/main.c
@@ -22,6 +22,7 @@
 #include "libc/diskio.h"
 #include "libc/vsprintf.h"
 #include "kernel.h"
+#include "drivers/drivers.h"
 #include "libopenbios/ofmem.h"
 #define NO_QEMU_PROTOS
 #include "arch/common/fw_cfg.h"
@@ -78,5 +79,7 @@ boot( void )
 	        check_preloaded_kernel();
 	}
 
-	update_nvram();
+	if (is_apple()) {
+		update_nvram();
+	}
 }
diff --git a/openbios-devel/config/examples/ppc_config.xml b/openbios-devel/config/examples/ppc_config.xml
index 5bb789f..200775d 100644
--- a/openbios-devel/config/examples/ppc_config.xml
+++ b/openbios-devel/config/examples/ppc_config.xml
@@ -8,6 +8,7 @@
   <option name="CONFIG_DEBUG_INTERPRETER" type="boolean" value="false"/>
   <option name="CONFIG_DEBUG_CONSOLE" type="boolean" value="true"/>
   <option name="CONFIG_DEBUG_CONSOLE_SERIAL" type="boolean" value="true"/>
+  <option name="CONFIG_DRIVER_PC_SERIAL" type="boolean" value="true"/>
   <option name="CONFIG_SERIAL_PORT" type="integer" value="0"/>
   <option name="CONFIG_SERIAL_SPEED" type="integer" value="115200"/>
   <option name="CONFIG_DEBUG_CONSOLE_VGA" type="boolean" value="true"/>
-- 
1.7.10.4