Merge to Fedora kernel-2.6.7-1.492

[linux-2.6.git] / arch / ppc / kernel / setup.c

diff --git a/arch/ppc/kernel/setup.c b/arch/ppc/kernel/setup.c
index 18a2f14..e2f7503 100644 (file)
--- a/arch/ppc/kernel/setup.c
+++ b/arch/ppc/kernel/setup.c
@@ -16,6 +16,7 @@
 #include <linux/seq_file.h>
 #include <linux/root_dev.h>
 #include <linux/cpu.h>
+#include <linux/console.h>
 
 #include <asm/residual.h>
 #include <asm/io.h>
@@ -54,7 +55,6 @@ extern void ppc6xx_idle(void);
 extern void power4_idle(void);
 
 extern boot_infos_t *boot_infos;
-char saved_command_line[COMMAND_LINE_SIZE];
 unsigned char aux_device_present;
 struct ide_machdep_calls ppc_ide_md;
 char *sysmap;
@@ -474,6 +474,60 @@ platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
                break;
        }
 }
+
+#ifdef CONFIG_SERIAL_CORE_CONSOLE
+extern char *of_stdout_device;
+
+static int __init set_preferred_console(void)
+{
+       struct device_node *prom_stdout;
+       char *name;
+       int offset;
+
+       /* The user has requested a console so this is already set up. */
+       if (strstr(saved_command_line, "console="))
+               return -EBUSY;
+
+       prom_stdout = find_path_device(of_stdout_device);
+       if (!prom_stdout)
+               return -ENODEV;
+
+       name = (char *)get_property(prom_stdout, "name", NULL);
+       if (!name)
+               return -ENODEV;
+
+       if (strcmp(name, "serial") == 0) {
+               int i;
+               u32 *reg = (u32 *)get_property(prom_stdout, "reg", &i);
+               if (i > 8) {
+                       switch (reg[1]) {
+                               case 0x3f8:
+                                       offset = 0;
+                                       break;
+                               case 0x2f8:
+                                       offset = 1;
+                                       break;
+                               case 0x898:
+                                       offset = 2;
+                                       break;
+                               case 0x890:
+                                       offset = 3;
+                                       break;
+                               default:
+                                       /* We dont recognise the serial port */
+                                       return -ENODEV;
+                       }
+               }
+       } else if (strcmp(name, "ch-a") == 0)
+               offset = 0;
+       else if (strcmp(name, "ch-b") == 0)
+               offset = 1;
+       else
+               return -ENODEV;
+       return add_preferred_console("ttyS", offset, NULL);
+}
+console_initcall(set_preferred_console);
+#endif /* CONFIG_SERIAL_CORE_CONSOLE */
 #endif /* CONFIG_PPC_MULTIPLATFORM */
 
 struct bi_record *find_bootinfo(void)
@@ -677,7 +731,7 @@ void __init setup_arch(char **cmdline_p)
        init_mm.brk = (unsigned long) klimit;
 
        /* Save unparsed command line copy for /proc/cmdline */
-       strlcpy(saved_command_line, cmd_line, sizeof(saved_command_line));
+       strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE);
        *cmdline_p = cmd_line;
 
        /* set up the bootmem stuff with available memory */