From 31b4edc67b75658ce5e2d41f2fc87331f4b26d49 Mon Sep 17 00:00:00 2001
From: bhgv <bhgv.empire@gmail.com>
Date: Sun, 10 May 2020 02:59:23 +0300
Subject: a try to add support of FreeRTOS riscV-64 (k210 cpu). first step

---
 emu/FreeRTOS/devfs.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 emu/FreeRTOS/devfs.c

(limited to 'emu/FreeRTOS/devfs.c')

diff --git a/emu/FreeRTOS/devfs.c b/emu/FreeRTOS/devfs.c
new file mode 100644
index 0000000..d697d7b
--- /dev/null
+++ b/emu/FreeRTOS/devfs.c
@@ -0,0 +1,26 @@
+#include "devfs-posix.c"
+
+#include	<linux/hdreg.h>
+#include	<linux/fs.h>
+#include	<sys/ioctl.h>
+
+static vlong
+osdisksize(int fd)
+{
+	uvlong u64;
+	long l;
+	struct hd_geometry geo;
+	
+	memset(&geo, 0, sizeof geo);
+	l = 0;
+	u64 = 0;
+#ifdef BLKGETSIZE64
+	if(ioctl(fd, BLKGETSIZE64, &u64) >= 0)
+		return u64;
+#endif
+	if(ioctl(fd, BLKGETSIZE, &l) >= 0)
+		return l*512;
+	if(ioctl(fd, HDIO_GETGEO, &geo) >= 0)
+		return (vlong)geo.heads*geo.sectors*geo.cylinders*512;
+	return 0;
+}
-- 
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