[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/arch/x86/mm/testmmiotrace.c b/src/kernel/linux/v4.14/arch/x86/mm/testmmiotrace.c
new file mode 100644
index 0000000..f6ae683
--- /dev/null
+++ b/src/kernel/linux/v4.14/arch/x86/mm/testmmiotrace.c
@@ -0,0 +1,140 @@
+/*
+ * Written by Pekka Paalanen, 2008-2009 <pq@iki.fi>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/mmiotrace.h>
+
+static unsigned long mmio_address;
+module_param_hw(mmio_address, ulong, iomem, 0);
+MODULE_PARM_DESC(mmio_address, " Start address of the mapping of 16 kB "
+ "(or 8 MB if read_far is non-zero).");
+
+static unsigned long read_far = 0x400100;
+module_param(read_far, ulong, 0);
+MODULE_PARM_DESC(read_far, " Offset of a 32-bit read within 8 MB "
+ "(default: 0x400100).");
+
+static unsigned v16(unsigned i)
+{
+ return i * 12 + 7;
+}
+
+static unsigned v32(unsigned i)
+{
+ return i * 212371 + 13;
+}
+
+static void do_write_test(void __iomem *p)
+{
+ unsigned int i;
+ pr_info("write test.\n");
+ mmiotrace_printk("Write test.\n");
+
+ for (i = 0; i < 256; i++)
+ iowrite8(i, p + i);
+
+ for (i = 1024; i < (5 * 1024); i += 2)
+ iowrite16(v16(i), p + i);
+
+ for (i = (5 * 1024); i < (16 * 1024); i += 4)
+ iowrite32(v32(i), p + i);
+}
+
+static void do_read_test(void __iomem *p)
+{
+ unsigned int i;
+ unsigned errs[3] = { 0 };
+ pr_info("read test.\n");
+ mmiotrace_printk("Read test.\n");
+
+ for (i = 0; i < 256; i++)
+ if (ioread8(p + i) != i)
+ ++errs[0];
+
+ for (i = 1024; i < (5 * 1024); i += 2)
+ if (ioread16(p + i) != v16(i))
+ ++errs[1];
+
+ for (i = (5 * 1024); i < (16 * 1024); i += 4)
+ if (ioread32(p + i) != v32(i))
+ ++errs[2];
+
+ mmiotrace_printk("Read errors: 8-bit %d, 16-bit %d, 32-bit %d.\n",
+ errs[0], errs[1], errs[2]);
+}
+
+static void do_read_far_test(void __iomem *p)
+{
+ pr_info("read far test.\n");
+ mmiotrace_printk("Read far test.\n");
+
+ ioread32(p + read_far);
+}
+
+static void do_test(unsigned long size)
+{
+ void __iomem *p = ioremap_nocache(mmio_address, size);
+ if (!p) {
+ pr_err("could not ioremap, aborting.\n");
+ return;
+ }
+ mmiotrace_printk("ioremap returned %p.\n", p);
+ do_write_test(p);
+ do_read_test(p);
+ if (read_far && read_far < size - 4)
+ do_read_far_test(p);
+ iounmap(p);
+}
+
+/*
+ * Tests how mmiotrace behaves in face of multiple ioremap / iounmaps in
+ * a short time. We had a bug in deferred freeing procedure which tried
+ * to free this region multiple times (ioremap can reuse the same address
+ * for many mappings).
+ */
+static void do_test_bulk_ioremapping(void)
+{
+ void __iomem *p;
+ int i;
+
+ for (i = 0; i < 10; ++i) {
+ p = ioremap_nocache(mmio_address, PAGE_SIZE);
+ if (p)
+ iounmap(p);
+ }
+
+ /* Force freeing. If it will crash we will know why. */
+ synchronize_rcu();
+}
+
+static int __init init(void)
+{
+ unsigned long size = (read_far) ? (8 << 20) : (16 << 10);
+
+ if (mmio_address == 0) {
+ pr_err("you have to use the module argument mmio_address.\n");
+ pr_err("DO NOT LOAD THIS MODULE UNLESS YOU REALLY KNOW WHAT YOU ARE DOING!\n");
+ return -ENXIO;
+ }
+
+ pr_warning("WARNING: mapping %lu kB @ 0x%08lx in PCI address space, "
+ "and writing 16 kB of rubbish in there.\n",
+ size >> 10, mmio_address);
+ do_test(size);
+ do_test_bulk_ioremapping();
+ pr_info("All done.\n");
+ return 0;
+}
+
+static void __exit cleanup(void)
+{
+ pr_debug("unloaded.\n");
+}
+
+module_init(init);
+module_exit(cleanup);
+MODULE_LICENSE("GPL");