GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/bootloader/u-boot-2020.01/lib/linux_compat.c

@@ -0,0 +1,61 @@
+
+#include <common.h>
+#include <memalign.h>
+#include <linux/compat.h>
+
+struct p_current cur = {
+	.pid = 1,
+};
+__maybe_unused struct p_current *current = &cur;
+
+unsigned long copy_from_user(void *dest, const void *src,
+		     unsigned long count)
+{
+	memcpy((void *)dest, (void *)src, count);
+	return 0;
+}
+
+void *kmalloc(size_t size, int flags)
+{
+	void *p;
+
+	p = malloc_cache_aligned(size);
+	if (p && flags & __GFP_ZERO)
+		memset(p, 0, size);
+
+	return p;
+}
+
+struct kmem_cache *get_mem(int element_sz)
+{
+	struct kmem_cache *ret;
+
+	ret = memalign(ARCH_DMA_MINALIGN, sizeof(struct kmem_cache));
+	ret->sz = element_sz;
+
+	return ret;
+}
+
+void *kmem_cache_alloc(struct kmem_cache *obj, int flag)
+{
+	return malloc_cache_aligned(obj->sz);
+}
+
+/**
+ * kmemdup - duplicate region of memory
+ *
+ * @src: memory region to duplicate
+ * @len: memory region length
+ * @gfp: GFP mask to use
+ *
+ * Return: newly allocated copy of @src or %NULL in case of error
+ */
+void *kmemdup(const void *src, size_t len, gfp_t gfp)
+{
+	void *p;
+
+	p = kmalloc(len, gfp);
+	if (p)
+		memcpy(p, src, len);
+	return p;
+}