removed usage of the 0x8d000 to 0x9ffff memory range, as its needed by PXE UNDI.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19126 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/system/boot/platform/bios_ia32/mmu.cpp

@@ -59,6 +59,23 @@ struct extended_memory {
 	uint32 type;
 };
 
+#ifdef _PXE_ENV
+
+static const uint32 kDefaultPageTableFlags = 0x07;	// present, user, R/W
+static const size_t kMaxKernelSize = 0x100000;		// 1 MB for the kernel
+static const uint32 kPageTableRegionEnd = 0x110000;
+
+// working page directory and page table
+static uint32 *sPageDirectory = 0;
+
+static addr_t sNextPhysicalAddress = 0x110000;
+static addr_t sNextVirtualAddress = KERNEL_BASE + kMaxKernelSize;
+static addr_t sMaxVirtualAddress = KERNEL_BASE + 0x400000;
+
+static addr_t sNextPageTableAddress = 0x100000;
+
+#else
+
 static const uint32 kDefaultPageTableFlags = 0x07;	// present, user, R/W
 static const size_t kMaxKernelSize = 0x100000;		// 1 MB for the kernel
 static const uint32 kPageTableRegionEnd = 0x9e000;
@@ -73,6 +90,8 @@ static addr_t sMaxVirtualAddress = KERNEL_BASE + 0x400000;
 
 static addr_t sNextPageTableAddress = 0x90000;
 
+#endif
+
 
 static addr_t
 get_next_virtual_address(size_t size)
@@ -266,7 +285,7 @@ init_page_directory(void)
 	// These page tables won't be taken over into the kernel.
 
 	// make the first page table at the first free spot
-	uint32 *pageTable = get_next_page_table();;
+	uint32 *pageTable = get_next_page_table();
 
 	for (int32 i = 0; i < 1024; i++) {
 		pageTable[i] = (i * 0x1000) | kDefaultPageFlags;
@@ -275,7 +294,7 @@ init_page_directory(void)
 	sPageDirectory[0] = (uint32)pageTable | kDefaultPageFlags;
 
 	// make the second page table
-	pageTable = get_next_page_table();;
+	pageTable = get_next_page_table();
 
 	for (int32 i = 0; i < 1024; i++) {
 		pageTable[i] = (i * 0x1000 + 0x400000) | kDefaultPageFlags;

src/system/boot/platform/bios_ia32/smp.cpp

@@ -396,8 +396,13 @@ smp_boot_other_cpus(void)
 
 	// allocate a stack and a code area for the smp trampoline
 	// (these have to be < 1M physical, 0xa0000-0xfffff is reserved by the BIOS)
+#ifdef _PXE_ENV
+	trampolineCode = 0x8b000;
+	trampolineStack = 0x8c000;
+#else
 	trampolineCode = 0x9f000;
 	trampolineStack = 0x9e000;
+#endif
 
 	// copy the trampoline code over
 	memcpy((char *)trampolineCode, (const void*)&smp_trampoline,

src/system/boot/platform/pxe_ia32/Jamfile

@@ -9,7 +9,7 @@ UsePrivateHeaders [ FDirName graphics vesa ] ;
 UsePrivateHeaders [ FDirName storage ] ;
 
 {
-	local defines = _BOOT_MODE ;
+	local defines = _BOOT_MODE _PXE_ENV ;
 
 	defines = [ FDefines $(defines) ] ;
 	SubDirCcFlags $(defines) -Wall -Wno-multichar ;
@@ -28,7 +28,6 @@ local bios_ia32_src =
 	mmu.cpp
 	cpu.cpp
 	smp.cpp
-	smp_trampoline.S
 	support.S
 	video.cpp
 	apm.cpp
@@ -36,6 +35,7 @@ local bios_ia32_src =
 
 KernelMergeObject boot_platform_pxe_ia32.o :
 	pxe_stage2.S
+	smp_trampoline.S
 	$(bios_ia32_src)
 	
 	# generic

src/system/boot/platform/pxe_ia32/pxe_stage1.S

@@ -30,7 +30,8 @@
 // 0x00000 - 0x07bff		real mode IDT, stack
 // 0x07C00 - 0x08FFF		pxehaiku (stage 1, this)
 // 0x09000 - 0x0FFFF		scratchbuffer
-// 0x10000 - 0x8CFFF		pxe-haiku-loader (stage 2)
+// 0x10000 - 0x8AFFF		pxe-haiku-loader (stage 2)
+// 0x8B000 - 0x8CFFF		used by stage2 trampoline code
 // 0x8D000 - 0x9F7FF		PXE and UNDI code and data segments
 // 0x9F800 - 0xA0000		extended BIOS data area
 
@@ -40,7 +41,7 @@
 .equ scratchbuffer_size,		0x7000
 
 .equ load_addr,					0x10000
-.equ load_size_max,				(0x8D000 - load_addr)
+.equ load_size_max,				(0x8B000 - load_addr)
 
 .code16
 .text

src/system/boot/platform/pxe_ia32/smp_trampoline.S

@@ -3,14 +3,14 @@
 ** Distributed under the terms of the NewOS License.
 */
 // expects a stack page like this:
-// (stack has to be at (0x9e000)
+// (stack has to be at (0x8c000)
-//	0x9effc            : final esp
+//	0x8cffc            : final esp
-//  0x9eff8            : page dir
+//  0x8cff8            : page dir
 //
-//  0x9e000 - 0x9e006  : gdt descriptor
+//  0x8c000 - 0x8c006  : gdt descriptor
-//	0x9e008 - 0x9e020  : gdt
+//	0x8c008 - 0x8c020  : gdt
 //
-// smp_trampoline must be located at 0x9f000
+// smp_trampoline must be located at 0x8b000
 .globl smp_trampoline
 .globl smp_trampoline_end
 .globl foo
@@ -19,11 +19,11 @@
 smp_trampoline:
 	cli
 	
-	mov    $0x9e00,%ax
+	mov    $0x8c00,%ax
 	mov    %ax,%ds
 
-//	lgdt   0x9e000          # load the gdt
+//	lgdt   0x8c000          # load the gdt
-.byte 0x66, 0x0f, 0x01, 0x15, 0x00, 0xe0, 0x09, 0x00
+.byte 0x66, 0x0f, 0x01, 0x15, 0x00, 0xc0, 0x08, 0x00
 
 	movl   %cr0,%eax
 	orl    $0x01,%eax
@@ -32,7 +32,7 @@ smp_trampoline:
 .code32
 _trampoline_32:
 	.byte 0x66
-	ljmp   $0x08,$(trampoline_32 - smp_trampoline + 0x9f000)
+	ljmp   $0x08,$(trampoline_32 - smp_trampoline + 0x8b000)
 trampoline_32:
 	mov    $0x10, %ax
 	mov    %ax, %ds
@@ -41,7 +41,7 @@ trampoline_32:
 	mov    %ax, %gs
 	mov    %ax, %ss
 
-	movl   $0x9eff8,%esp    # set up the stack pointer
+	movl   $0x8cff8,%esp    # set up the stack pointer
 
 	popl   %eax             # get the page dir
 	movl   %eax,%cr3        # set the page dir