Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 121 insertions, 0 deletions

diff --git a/arch/ppc64/kernel/hvconsole.c b/arch/ppc64/kernel/hvconsole.c
new file mode 100644
index 000000000000..c72fb8ffe974
--- /dev/null
+++ b/arch/ppc64/kernel/hvconsole.c
@@ -0,0 +1,121 @@
+/*
+ * hvconsole.c
+ * Copyright (C) 2004 Hollis Blanchard, IBM Corporation
+ * Copyright (C) 2004 IBM Corporation
+ *
+ * Additional Author(s):
+ *  Ryan S. Arnold <rsa@us.ibm.com>
+ *
+ * LPAR console support.
+ * 
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <asm/hvcall.h>
+#include <asm/hvconsole.h>
+#include <asm/prom.h>
+
+/**
+ * hvc_get_chars - retrieve characters from firmware for denoted vterm adatper
+ * @vtermno: The vtermno or unit_address of the adapter from which to fetch the
+ *      data.
+ * @buf: The character buffer into which to put the character data fetched from
+ *      firmware.
+ * @count: not used?
+ */
+int hvc_get_chars(uint32_t vtermno, char *buf, int count)
+{
+        unsigned long got;
+
+        if (plpar_hcall(H_GET_TERM_CHAR, vtermno, 0, 0, 0, &got,
+                (unsigned long *)buf, (unsigned long *)buf+1) == H_Success) {
+                /*
+                 * Work around a HV bug where it gives us a null
+                 * after every \r.  -- paulus
+                 */
+                if (got > 0) {
+                        int i;
+                        for (i = 1; i < got; ++i) {
+                                if (buf[i] == 0 && buf[i-1] == '\r') {
+                                        --got;
+                                        if (i < got)
+                                                memmove(&buf[i], &buf[i+1],
+                                                        got - i);
+                                }
+                        }
+                }
+                return got;
+        }
+        return 0;
+}
+
+EXPORT_SYMBOL(hvc_get_chars);
+
+/**
+ * hvc_put_chars: send characters to firmware for denoted vterm adapter
+ * @vtermno: The vtermno or unit_address of the adapter from which the data
+ *      originated.
+ * @buf: The character buffer that contains the character data to send to
+ *      firmware.
+ * @count: Send this number of characters.
+ */
+int hvc_put_chars(uint32_t vtermno, const char *buf, int count)
+{
+        unsigned long *lbuf = (unsigned long *) buf;
+        long ret;
+
+        ret = plpar_hcall_norets(H_PUT_TERM_CHAR, vtermno, count, lbuf[0],
+                                 lbuf[1]);
+        if (ret == H_Success)
+                return count;
+        if (ret == H_Busy)
+                return 0;
+        return -EIO;
+}
+
+EXPORT_SYMBOL(hvc_put_chars);
+
+/*
+ * We hope/assume that the first vty found corresponds to the first console
+ * device.
+ */
+int hvc_find_vtys(void)
+{
+        struct device_node *vty;
+        int num_found = 0;
+
+        for (vty = of_find_node_by_name(NULL, "vty"); vty != NULL;
+                        vty = of_find_node_by_name(vty, "vty")) {
+                uint32_t *vtermno;
+
+                /* We have statically defined space for only a certain number of
+                 * console adapters. */
+                if (num_found >= MAX_NR_HVC_CONSOLES)
+                        break;
+
+                vtermno = (uint32_t *)get_property(vty, "reg", NULL);
+                if (!vtermno)
+                        continue;
+
+                if (device_is_compatible(vty, "hvterm1")) {
+                        hvc_instantiate(*vtermno, num_found);
+                        ++num_found;
+                }
+        }
+
+        return num_found;
+}