bitkeeper revision 1.1668.1.11 (42a8bd5aCFsumaFg9rk2nWmEBa7opA)

Oops, yet another file for Greg's checkin

.rootkeys

@@ -1099,6 +1099,7 @@
 41a26ebcJ30TFl1v2kR8rqpEBvOtVw xen/arch/ia64/regionreg.c
 421098b69pUiIJrqu_w0JMUnZ2uc2A xen/arch/ia64/smp.c
 421098b6_ToSGrf6Pk1Uwg5aMAIBxg xen/arch/ia64/smpboot.c
+42a8bd43dIEIsS-EoQqt5Df1RTr5Hg xen/arch/ia64/sn_console.c
 428b9f38JJDW35iDn5DlfXTu700rkQ xen/arch/ia64/tools/README.RunVT
 421098b6AUdbxR3wyn1ATcmNuTao_Q xen/arch/ia64/tools/README.xenia64
 42376c6dfyY0eq8MS2dK3BW2rFuEGg xen/arch/ia64/tools/README.xenia64linux

xen/arch/ia64/sn_console.c

@@ -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);
+}