From: John Hodge <tpg@mutabah.net>
Date: Sat, 15 May 2010 05:10:38 +0000 (+0800)
Subject: Slight memory organisation changes
X-Git-Tag: rel0.06~187
X-Git-Url: https://git.ucc.asn.au/?a=commitdiff_plain;h=55b476b828e551a75975468ffe15d08a32b10fb1;p=tpg%2Facess2.git

Slight memory organisation changes
---

diff --git a/Kernel/arch/x86_64/include/mm_virt.h b/Kernel/arch/x86_64/include/mm_virt.h
index a5abc71a..86081f38 100644
--- a/Kernel/arch/x86_64/include/mm_virt.h
+++ b/Kernel/arch/x86_64/include/mm_virt.h
@@ -21,10 +21,11 @@
  *       8000 00000000 -       8000 7FFFFFFF	31	2   GiB	Identity Map
  *       8000 80000000 -       9000 00000000	~44	16  TiB	Kernel Heap
  *       9000 00000000 -       9800 00000000	43	8   TiB	Module Space
- *       9800 00000000 -       9900 00000000	40	1   TiB	Per-Process Data
- *       9900 00000000 -       9A00 00000000	40	1   TiB	Kernel VFS
+ *       9800 00000000 -       9A00 00000000	41	2   TiB	Kernel VFS
  *       A000 00000000 -       B000 00000000	44	16  TiB	Kernel Stacks
  *       D000 00000000 -       E000 00000000	44	16  TiB	Hardware Mappings
+ *       E000 00000000 -       E080 00000000	39	512	GiB	Per-Process Data
+ *       E080 00000000 -       E100 00000000	39	512	GiB	Kernel Supplied User Code
  *       FE00 00000000 -       FE80 00000000	39	512 GiB	Fractal Mapping (PML4 510)
  *       FE80 00000000 -       FF00 00000000	39	512 GiB	Temp Fractal Mapping
  */
@@ -39,15 +40,16 @@
 #define MM_KHEAP_MAX	(KERNEL_BASE|(0x8001##00000000))
 #define MM_MODULE_MIN	(KERNEL_BASE|(0x9000##00000000))
 #define MM_MODULE_MAX	(KERNEL_BASE|(0x9800##00000000))
-#define MM_PPD_BASE 	(KERNEL_BASE|(0x9800##00000000))
-#define MM_PPD_CFG  	MM_PPD_BASE
-#define MM_PPD_VFS  	(KERNEL_BASE|(0x9880##00000000))
-#define MM_KERNEL_VFS	(KERNEL_BASE|(0x9900##00000000))
+#define MM_KERNEL_VFS	(KERNEL_BASE|(0x9800##00000000))
 #define MM_KSTACK_BASE	(KERNEL_BASE|(0xA000##00000000))
 #define MM_KSTACK_TOP	(KERNEL_BASE|(0xC000##00000000))
 
 #define MM_HWMAP_BASE	(KERNEL_BASE|(0xD000##00000000))
 #define MM_HWMAP_TOP	(KERNEL_BASE|(0xE000##00000000))
+#define MM_PPD_BASE 	(KERNEL_BASE|(0xE000##00000000))
+#define MM_PPD_CFG  	MM_PPD_BASE
+#define MM_PPD_VFS  	(KERNEL_BASE|(0xE008##00000000))
+#define MM_USER_CODE	(KERNEL_BASE|(0xE080##00000000))
 
 #define MM_LOCALAPIC	(KERNEL_BASE|(0xFD00##00000000))
 #define MM_FRACTAL_BASE	(KERNEL_BASE|(0xFE00##00000000))
diff --git a/Kernel/arch/x86_64/mm_virt.c b/Kernel/arch/x86_64/mm_virt.c
index 4cce4854..b7814219 100644
--- a/Kernel/arch/x86_64/mm_virt.c
+++ b/Kernel/arch/x86_64/mm_virt.c
@@ -266,3 +266,19 @@ void MM_FreeTemp(tVAddr VAddr)
 	Log_KernelPanic("MM", "TODO: Implement MM_FreeTemp");
 	return ;
 }
+
+
+// --- Address Space Clone --
+tPAddr MM_Clone(void)
+{
+	tPAddr	ret;
+	
+	// #1 Create a copy of the PML4
+	ret = MM_AllocPhys();
+	if(!ret)	return 0;
+	
+	// #2 Alter the fractal pointer
+	// #3 Set Copy-On-Write to all user pages
+	// #4 Return
+	
+}