Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / sh / kernel / machvec.c

diff --git a/kernel/arch/sh/kernel/machvec.c b/kernel/arch/sh/kernel/machvec.c
new file mode 100644 (file)
index 0000000..ec05f49
--- /dev/null
+++ b/kernel/arch/sh/kernel/machvec.c
@@ -0,0 +1,124 @@
+/*
+ * arch/sh/kernel/machvec.c
+ *
+ * The SuperH machine vector setup handlers, yanked from setup.c
+ *
+ *  Copyright (C) 1999  Niibe Yutaka
+ *  Copyright (C) 2002 - 2007 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/init.h>
+#include <linux/string.h>
+#include <asm/machvec.h>
+#include <asm/sections.h>
+#include <asm/addrspace.h>
+#include <asm/setup.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+
+#define MV_NAME_SIZE 32
+
+#define for_each_mv(mv) \
+       for ((mv) = (struct sh_machine_vector *)&__machvec_start; \
+            (mv) && (unsigned long)(mv) < (unsigned long)&__machvec_end; \
+            (mv)++)
+
+static struct sh_machine_vector * __init get_mv_byname(const char *name)
+{
+       struct sh_machine_vector *mv;
+
+       for_each_mv(mv)
+               if (strcasecmp(name, mv->mv_name) == 0)
+                       return mv;
+
+       return NULL;
+}
+
+static unsigned int __initdata machvec_selected;
+
+static int __init early_parse_mv(char *from)
+{
+       char mv_name[MV_NAME_SIZE] = "";
+       char *mv_end;
+       char *mv_comma;
+       int mv_len;
+       struct sh_machine_vector *mvp;
+
+       mv_end = strchr(from, ' ');
+       if (mv_end == NULL)
+               mv_end = from + strlen(from);
+
+       mv_comma = strchr(from, ',');
+       mv_len = mv_end - from;
+       if (mv_len > (MV_NAME_SIZE-1))
+               mv_len = MV_NAME_SIZE-1;
+       memcpy(mv_name, from, mv_len);
+       mv_name[mv_len] = '\0';
+       from = mv_end;
+
+       machvec_selected = 1;
+
+       /* Boot with the generic vector */
+       if (strcmp(mv_name, "generic") == 0)
+               return 0;
+
+       mvp = get_mv_byname(mv_name);
+       if (unlikely(!mvp)) {
+               printk("Available vectors:\n\n\t'%s', ", sh_mv.mv_name);
+               for_each_mv(mvp)
+                       printk("'%s', ", mvp->mv_name);
+               printk("\n\n");
+               panic("Failed to select machvec '%s' -- halting.\n",
+                     mv_name);
+       } else
+               sh_mv = *mvp;
+
+       return 0;
+}
+early_param("sh_mv", early_parse_mv);
+
+void __init sh_mv_setup(void)
+{
+       /*
+        * Only overload the machvec if one hasn't been selected on
+        * the command line with sh_mv=
+        */
+       if (!machvec_selected) {
+               unsigned long machvec_size;
+
+               machvec_size = ((unsigned long)&__machvec_end -
+                               (unsigned long)&__machvec_start);
+
+               /*
+                * Sanity check for machvec section alignment. Ensure
+                * __initmv hasn't been misused.
+                */
+               if (machvec_size % sizeof(struct sh_machine_vector))
+                       panic("machvec misaligned, invalid __initmv use?");
+
+               /*
+                * If the machvec hasn't been preselected, use the first
+                * vector (usually the only one) from .machvec.init.
+                */
+               if (machvec_size >= sizeof(struct sh_machine_vector))
+                       sh_mv = *(struct sh_machine_vector *)&__machvec_start;
+       }
+
+       printk(KERN_NOTICE "Booting machvec: %s\n", get_system_type());
+
+       /*
+        * Manually walk the vec, fill in anything that the board hasn't yet
+        * by hand, wrapping to the generic implementation.
+        */
+#define mv_set(elem) do { \
+       if (!sh_mv.mv_##elem) \
+               sh_mv.mv_##elem = generic_##elem; \
+} while (0)
+
+       mv_set(irq_demux);
+       mv_set(mode_pins);
+       mv_set(mem_init);
+}