Architectural Support: x86_64 (#37)

[lunaix-os.git] / lunaix-os / arch / x86 / mm / vmutils.c

diff --git a/lunaix-os/arch/x86/mm/vmutils.c b/lunaix-os/arch/x86/mm/vmutils.c
new file mode 100644 (file)
index 0000000..df831c2
--- /dev/null
+++ b/lunaix-os/arch/x86/mm/vmutils.c
@@ -0,0 +1,39 @@
+#include <lunaix/mm/page.h>
+#include <sys/mm/mm_defs.h>
+
+struct leaflet*
+dup_leaflet(struct leaflet* leaflet)
+{
+    ptr_t dest_va, src_va;
+    struct leaflet* new_leaflet;
+    
+    new_leaflet = alloc_leaflet(leaflet_order(leaflet));
+
+    src_va = leaflet_mount(leaflet);
+    dest_va = vmap(new_leaflet, KERNEL_DATA);
+
+    size_t cnt_wordsz = leaflet_size(new_leaflet) / sizeof(ptr_t);
+
+#ifdef CONFIG_ARCH_X86_64
+    asm volatile("movq %1, %%rdi\n"
+                 "movq %2, %%rsi\n"
+                 "rep movsq\n" ::"c"(cnt_wordsz),
+                 "r"(dest_va),
+                 "r"(src_va)
+                 : "memory", "%edi", "%esi");
+
+#else
+    asm volatile("movl %1, %%edi\n"
+                 "movl %2, %%esi\n"
+                 "rep movsl\n" ::"c"(cnt_wordsz),
+                 "r"(dest_va),
+                 "r"(src_va)
+                 : "memory", "%edi", "%esi");
+
+#endif
+
+    leaflet_unmount(leaflet);
+    vunmap(dest_va, new_leaflet);
+
+    return new_leaflet;
+}
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