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authorIshizaki Kou <kou.ishizaki@toshiba.co.jp>2007-02-02 16:43:21 +0900
committerPaul Mackerras <paulus@samba.org>2007-02-07 14:03:21 +1100
commitd7480a9feaa970d9c37462f21bc27ebab2c56b0b (patch)
tree4dbd599f52d6d6abd96d11371e5aa00611854d55 /arch/powerpc
parentfe4a0cf1c2e79c3c256992c4f731734ecacb45c3 (diff)
[POWERPC] Celleb: support udbg
This patch adds udbg support for Celleb platform. Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/kernel/udbg.c2
-rw-r--r--arch/powerpc/platforms/celleb/udbg_beat.c97
2 files changed, 99 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/udbg.c b/arch/powerpc/kernel/udbg.c
index 5730906b23d..e225a761dc2 100644
--- a/arch/powerpc/kernel/udbg.c
+++ b/arch/powerpc/kernel/udbg.c
@@ -45,6 +45,8 @@ void __init udbg_early_init(void)
#elif defined(CONFIG_PPC_EARLY_DEBUG_ISERIES)
/* For iSeries - hit Ctrl-x Ctrl-x to see the output */
udbg_init_iseries();
+#elif defined(CONFIG_PPC_EARLY_DEBUG_BEAT)
+ udbg_init_debug_beat();
#endif
}
diff --git a/arch/powerpc/platforms/celleb/udbg_beat.c b/arch/powerpc/platforms/celleb/udbg_beat.c
new file mode 100644
index 00000000000..d888c4674c6
--- /dev/null
+++ b/arch/powerpc/platforms/celleb/udbg_beat.c
@@ -0,0 +1,97 @@
+/*
+ * udbg function for Beat
+ *
+ * (C) Copyright 2006 TOSHIBA CORPORATION
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/console.h>
+
+#include <asm/machdep.h>
+#include <asm/prom.h>
+#include <asm/udbg.h>
+
+#include "beat.h"
+
+#define celleb_vtermno 0
+
+static void udbg_putc_beat(char c)
+{
+ unsigned long rc;
+
+ if (c == '\n')
+ udbg_putc_beat('\r');
+
+ rc = beat_put_term_char(celleb_vtermno, 1, (uint64_t)c << 56, 0);
+}
+
+/* Buffered chars getc */
+static long inbuflen;
+static long inbuf[2]; /* must be 2 longs */
+
+static int udbg_getc_poll_beat(void)
+{
+ /* The interface is tricky because it may return up to 16 chars.
+ * We save them statically for future calls to udbg_getc().
+ */
+ char ch, *buf = (char *)inbuf;
+ int i;
+ long rc;
+ if (inbuflen == 0) {
+ /* get some more chars. */
+ inbuflen = 0;
+ rc = beat_get_term_char(celleb_vtermno, &inbuflen, inbuf+0, inbuf+1);
+ if (rc != 0)
+ inbuflen = 0; /* otherwise inbuflen is garbage */
+ }
+ if (inbuflen <= 0 || inbuflen > 16) {
+ /* Catch error case as well as other oddities (corruption) */
+ inbuflen = 0;
+ return -1;
+ }
+ ch = buf[0];
+ for (i = 1; i < inbuflen; i++) /* shuffle them down. */
+ buf[i-1] = buf[i];
+ inbuflen--;
+ return ch;
+}
+
+static int udbg_getc_beat(void)
+{
+ int ch;
+ for (;;) {
+ ch = udbg_getc_poll_beat();
+ if (ch == -1) {
+ /* This shouldn't be needed...but... */
+ volatile unsigned long delay;
+ for (delay=0; delay < 2000000; delay++)
+ ;
+ } else {
+ return ch;
+ }
+ }
+}
+
+/* call this from early_init() for a working debug console on
+ * vterm capable LPAR machines
+ */
+void __init udbg_init_debug_beat(void)
+{
+ udbg_putc = udbg_putc_beat;
+ udbg_getc = udbg_getc_beat;
+ udbg_getc_poll = udbg_getc_poll_beat;
+}