1 files changed, 90 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/cell/spufs/file.c b/arch/powerpc/platforms/cell/spufs/file.c
index 20b2a7aed63e..2a2dd6441010 100644
--- a/arch/powerpc/platforms/cell/spufs/file.c
+++ b/arch/powerpc/platforms/cell/spufs/file.c
@@ -1552,6 +1552,93 @@ static int spufs_info_open(struct inode *inode, struct file *file)
 	return 0;
 }
 
+static ssize_t spufs_mbox_info_read(struct file *file, char __user *buf,
+				   size_t len, loff_t *pos)
+{
+	struct spu_context *ctx = file->private_data;
+	u32 mbox_stat;
+	u32 data;
+
+	if (!access_ok(VERIFY_WRITE, buf, len))
+		return -EFAULT;
+
+	spu_acquire_saved(ctx);
+	spin_lock(&ctx->csa.register_lock);
+	mbox_stat = ctx->csa.prob.mb_stat_R;
+	if (mbox_stat & 0x0000ff) {
+		data = ctx->csa.prob.pu_mb_R;
+	}
+	spin_unlock(&ctx->csa.register_lock);
+	spu_release(ctx);
+
+	return simple_read_from_buffer(buf, len, pos, &data, sizeof data);
+}
+
+static struct file_operations spufs_mbox_info_fops = {
+	.open = spufs_info_open,
+	.read = spufs_mbox_info_read,
+	.llseek  = generic_file_llseek,
+};
+
+static ssize_t spufs_ibox_info_read(struct file *file, char __user *buf,
+				   size_t len, loff_t *pos)
+{
+	struct spu_context *ctx = file->private_data;
+	u32 ibox_stat;
+	u32 data;
+
+	if (!access_ok(VERIFY_WRITE, buf, len))
+		return -EFAULT;
+
+	spu_acquire_saved(ctx);
+	spin_lock(&ctx->csa.register_lock);
+	ibox_stat = ctx->csa.prob.mb_stat_R;
+	if (ibox_stat & 0xff0000) {
+		data = ctx->csa.priv2.puint_mb_R;
+	}
+	spin_unlock(&ctx->csa.register_lock);
+	spu_release(ctx);
+
+	return simple_read_from_buffer(buf, len, pos, &data, sizeof data);
+}
+
+static struct file_operations spufs_ibox_info_fops = {
+	.open = spufs_info_open,
+	.read = spufs_ibox_info_read,
+	.llseek  = generic_file_llseek,
+};
+
+static ssize_t spufs_wbox_info_read(struct file *file, char __user *buf,
+				   size_t len, loff_t *pos)
+{
+	struct spu_context *ctx = file->private_data;
+	int i, cnt;
+	u32 data[4];
+	u32 wbox_stat;
+
+	if (!access_ok(VERIFY_WRITE, buf, len))
+		return -EFAULT;
+
+	spu_acquire_saved(ctx);
+	spin_lock(&ctx->csa.register_lock);
+	wbox_stat = ctx->csa.prob.mb_stat_R;
+	cnt = (wbox_stat & 0x00ff00) >> 8;
+	for (i = 0; i < cnt; i++) {
+		data[i] = ctx->csa.spu_mailbox_data[i];
+	}
+	spin_unlock(&ctx->csa.register_lock);
+	spu_release(ctx);
+
+	return simple_read_from_buffer(buf, len, pos, &data,
+				cnt * sizeof(u32));
+}
+
+static struct file_operations spufs_wbox_info_fops = {
+	.open = spufs_info_open,
+	.read = spufs_wbox_info_read,
+	.llseek  = generic_file_llseek,
+};
+
 static ssize_t spufs_dma_info_read(struct file *file, char __user *buf,
 			      size_t len, loff_t *pos)
 {
@@ -1661,6 +1748,9 @@ struct tree_descr spufs_dir_contents[] = {
 	{ "psmap", &spufs_psmap_fops, 0666, },
 	{ "phys-id", &spufs_id_ops, 0666, },
 	{ "object-id", &spufs_object_id_ops, 0666, },
+	{ "mbox_info", &spufs_mbox_info_fops, 0444, },
+	{ "ibox_info", &spufs_ibox_info_fops, 0444, },
+	{ "wbox_info", &spufs_wbox_info_fops, 0444, },
 	{ "dma_info", &spufs_dma_info_fops, 0444, },
 	{ "proxydma_info", &spufs_proxydma_info_fops, 0444, },
 	{},