arch/tile: core support for Tilera 32-bit chips.

This change is the core kernel support for TILEPro and TILE64 chips.
No driver support (except the console driver) is included yet.

This includes the relevant Linux headers in asm/; the low-level
low-level "Tile architecture" headers in arch/, which are
shared with the hypervisor, etc., and are build-system agnostic;
and the relevant hypervisor headers in hv/.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Reviewed-by: Paul Mundt <lethal@linux-sh.org>

2 files changed, 68 insertions, 0 deletions

diff --git a/drivers/char/Makefile b/drivers/char/Makefile
index 88d6eac6975..273cee1cc77 100644
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -47,6 +47,7 @@ obj-$(CONFIG_RIO)		+= rio/ generic_serial.o
 obj-$(CONFIG_HVC_CONSOLE)       += hvc_vio.o hvsi.o
 obj-$(CONFIG_HVC_ISERIES)       += hvc_iseries.o
 obj-$(CONFIG_HVC_RTAS)          += hvc_rtas.o
+obj-$(CONFIG_HVC_TILE)          += hvc_tile.o
 obj-$(CONFIG_HVC_BEAT)          += hvc_beat.o
 obj-$(CONFIG_HVC_DRIVER)        += hvc_console.o
 obj-$(CONFIG_HVC_IRQ)           += hvc_irq.o
diff --git a/drivers/char/hvc_tile.c b/drivers/char/hvc_tile.c
new file mode 100644
index 00000000000..75715b32f22
--- /dev/null
+++ b/drivers/char/hvc_tile.c
@@ -0,0 +1,67 @@
+/*
+ * %LINUX_LICENSE%
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ * Tilera TILE Processor hypervisor console
+ */
+
+#include <linux/console.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+
+#include <hv/hypervisor.h>
+
+#include "hvc_console.h"
+
+static int hvc_tile_put_chars(uint32_t vt, const char *buf, int count)
+{
+        return hv_console_write((HV_VirtAddr)buf, count);
+}
+
+static int hvc_tile_get_chars(uint32_t vt, char *buf, int count)
+{
+        int i, c;
+
+        for (i = 0; i < count; ++i) {
+                c = hv_console_read_if_ready();
+                if (c < 0)
+                        break;
+                buf[i] = c;
+        }
+
+        return i;
+}
+
+static const struct hv_ops hvc_tile_get_put_ops = {
+        .get_chars = hvc_tile_get_chars,
+        .put_chars = hvc_tile_put_chars,
+};
+
+static int __init hvc_tile_console_init(void)
+{
+        extern void disable_early_printk(void);
+        hvc_instantiate(0, 0, &hvc_tile_get_put_ops);
+        add_preferred_console("hvc", 0, NULL);
+        disable_early_printk();
+        return 0;
+}
+console_initcall(hvc_tile_console_init);
+
+static int __init hvc_tile_init(void)
+{
+        hvc_alloc(0, 0, &hvc_tile_get_put_ops, 128);
+        return 0;
+}
+device_initcall(hvc_tile_init);