[Xen-changelog] Oops, yet another file for Greg's checkin

[BitKeeper Bot <riel@xxxxxxxxxxx>]

ChangeSet 1.1668.1.11, 2005/06/09 16:06:18-06:00, djm@xxxxxxxxxxxxxxx

        Oops, yet another file for Greg's checkin



 sn_console.c |   84 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 84 insertions(+)


diff -Nru a/xen/arch/ia64/sn_console.c b/xen/arch/ia64/sn_console.c
--- /dev/null   Wed Dec 31 16:00:00 196900
+++ b/xen/arch/ia64/sn_console.c        2005-06-10 14:04:48 -04:00
@@ -0,0 +1,84 @@
+/*
+ * C-Brick Serial Port (and console) driver for SGI Altix machines.
+ *
+ * Copyright (c) 2005 Silicon Graphics, Inc.  All Rights Reserved.
+ */
+
+#include <asm/acpi.h>
+#include <asm/sn/sn_sal.h>
+#include <xen/serial.h>
+
+void sn_putc(struct serial_port *, char);
+
+static struct uart_driver sn_sal_console = {
+       .putc = sn_putc,
+};
+
+/**
+ * early_sn_setup - early setup routine for SN platforms
+ *
+ * pulled from arch/ia64/sn/kernel/setup.c
+ */
+static void __init early_sn_setup(void)
+{
+       efi_system_table_t *efi_systab;
+       efi_config_table_t *config_tables;
+       struct ia64_sal_systab *sal_systab;
+       struct ia64_sal_desc_entry_point *ep;
+       char *p;
+       int i, j;
+
+       /*
+        * Parse enough of the SAL tables to locate the SAL entry point. Since, 
console
+        * IO on SN2 is done via SAL calls, early_printk won't work without 
this.
+        *
+        * This code duplicates some of the ACPI table parsing that is in efi.c 
& sal.c.
+        * Any changes to those file may have to be made hereas well.
+        */
+       efi_systab = (efi_system_table_t *) __va(ia64_boot_param->efi_systab);
+       config_tables = __va(efi_systab->tables);
+       for (i = 0; i < efi_systab->nr_tables; i++) {
+               if (efi_guidcmp(config_tables[i].guid, SAL_SYSTEM_TABLE_GUID) ==
+                   0) {
+                       sal_systab = __va(config_tables[i].table);
+                       p = (char *)(sal_systab + 1);
+                       for (j = 0; j < sal_systab->entry_count; j++) {
+                               if (*p == SAL_DESC_ENTRY_POINT) {
+                                       ep = (struct ia64_sal_desc_entry_point
+                                             *)p;
+                                       ia64_sal_handler_init(__va
+                                                             (ep->sal_proc),
+                                                             __va(ep->gp));
+                                       return;
+                               }
+                               p += SAL_DESC_SIZE(*p);
+                       }
+               }
+       }
+       /* Uh-oh, SAL not available?? */
+       printk(KERN_ERR "failed to find SAL entry point\n");
+}
+
+/**
+ * sn_serial_console_early_setup - Sets up early console output support
+ *
+ * pulled from drivers/serial/sn_console.c
+ */
+int __init sn_serial_console_early_setup(void)
+{
+       if (strcmp("sn2",acpi_get_sysname()))
+               return -1;
+
+       early_sn_setup();       /* Find SAL entry points */
+       serial_register_uart(0, &sn_sal_console, NULL);
+
+       return 0;
+}
+
+/*
+ * sn_putc - Send a character to the console, polled or interrupt mode
+ */
+void sn_putc(struct serial_port *port, char c)
+{
+       return ia64_sn_console_putc(c);
+}

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