[tkreuzer] 52284: [FREELDR] - Use the new realmode code for PxeCallApi, SoftReboot and ChainLoadBiosBootSectorCode - Remove o386cpi.S from build, the functions are not used - Use constants for func...
16 Jun
2011
16 Jun
'11
10:11 p.m.
Author: tkreuzer
Date: Thu Jun 16 22:11:53 2011
New Revision: 52284
URL: http://svn.reactos.org/svn/reactos?rev=52284&view=rev
Log:
[FREELDR]
- Use the new realmode code for PxeCallApi, SoftReboot and ChainLoadBiosBootSectorCode
- Remove o386cpi.S from build, the functions are not used
- Use constants for function ids
- Fix a warning
Modified:
trunk/reactos/boot/freeldr/freeldr/CMakeLists.txt
trunk/reactos/boot/freeldr/freeldr/arch/i386/entry.S
trunk/reactos/boot/freeldr/freeldr/arch/i386/i386idt.c
trunk/reactos/boot/freeldr/freeldr/arch/i386/realmode.S
trunk/reactos/boot/freeldr/freeldr/arch/realmode/helpers.inc
trunk/reactos/boot/freeldr/freeldr/arch/realmode/i386.S
trunk/reactos/boot/freeldr/freeldr/include/arch/pc/x86common.h
Modified: trunk/reactos/boot/freeldr/freeldr/CMakeLists.txt
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/boot/freeldr/freeldr/CMake…
==============================================================================
--- trunk/reactos/boot/freeldr/freeldr/CMakeLists.txt [iso-8859-1] (original)
+++ trunk/reactos/boot/freeldr/freeldr/CMakeLists.txt [iso-8859-1] Thu Jun 16 22:11:53
2011
@@ -16,11 +16,8 @@
arch/i386/i386bug.c)
if(NOT MSVC)
list(APPEND FREELDR_BASE64K_SOURCE
- arch/i386/boot.S
arch/i386/drvmap.S
- arch/i386/i386cpu.S
arch/i386/i386pnp.S
- arch/i386/i386pxe.S
arch/i386/linux.S
arch/i386/multiboot.S
arch/i386/mb.S)
@@ -32,8 +29,6 @@
if(NOT MSVC)
list(APPEND FREELDR_BASE64K_SOURCE
arch/i386/drvmap.S
- arch/i386/i386cpu.S
- arch/i386/i386idt.S
arch/i386/i386trap.S
arch/amd64/mb.S)
else()
Modified: trunk/reactos/boot/freeldr/freeldr/arch/i386/entry.S
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/boot/freeldr/freeldr/arch/…
==============================================================================
--- trunk/reactos/boot/freeldr/freeldr/arch/i386/entry.S [iso-8859-1] (original)
+++ trunk/reactos/boot/freeldr/freeldr/arch/i386/entry.S [iso-8859-1] Thu Jun 16 22:11:53
2011
@@ -259,8 +259,8 @@
mov ecx, 9
rep movsd
- /* Set the callback index */
- mov bx, 0
+ /* Set the function ID */
+ mov bx, FNID_Int386
/* Set continue address and switch to real mode */
mov dword ptr [ContinueAddress], offset Int386_return
@@ -282,6 +282,86 @@
ret
+/*
+ * U16 PxeCallApi(U16 Segment, U16 Offset, U16 Service, VOID *Parameter);
+ *
+ * RETURNS:
+ */
+PUBLIC _PxeCallApi
+_PxeCallApi:
+ push ebp
+ mov ebp, esp
+
+ pusha
+ push es
+
+ /* copy entry point */
+ mov eax, [ebp + 8]
+ shl eax, 16
+ mov ax, [ebp + 12]
+ mov dword ptr ds:[BSS_PxeEntryPoint], eax
+
+ /* copy function */
+ mov ax, [ebp + 16]
+ mov word ptr ds:[BSS_PxeFunction], ax
+
+ /* convert pointer to data buffer to segment/offset */
+ mov eax, [ebp + 20]
+ shr eax, 4
+ and eax, HEX(0f000)
+ mov word ptr ds:[BSS_PxeBufferSegment], ax
+ mov eax, [ebp + 20]
+ and eax, HEX(0ffff)
+ mov word ptr ds:[BSS_PxeBufferOffset], ax
+
+ /* Set the function ID and call realmode */
+ mov bx, FNID_PxeCallApi
+ call i386CallRealMode
+
+ pop es
+ popa
+
+ mov esp, ebp
+ pop ebp
+
+ mov ax, word ptr [BSS_PxeResult]
+
+ ret
+
+
+PUBLIC _SoftReboot
+_SoftReboot:
+ /* Set the function ID */
+ mov bx, FNID_SoftReboot
+
+ /*Switch to real mode (We don't return) */
+ jmp SwitchToReal
+
+
+PUBLIC _ChainLoadBiosBootSectorCode
+_ChainLoadBiosBootSectorCode:
+ /* Set the boot drive */
+ mov dl, byte ptr [_FrldrBootDrive]
+
+ /* Set the function ID */
+ mov bx, FNID_ChainLoadBiosBootSectorCode
+
+ /*Switch to real mode (We don't return) */
+ jmp SwitchToReal
+
+
+PUBLIC i386CallRealMode
+i386CallRealMode:
+ /* Set continue address and switch to real mode */
+ mov dword ptr [ContinueAddress], offset i386CallRealMode_return
+ jmp SwitchToReal
+i386CallRealMode_return:
+ ret
+
+
+/* Entrypoint for realmode function calls
+ * ContinueAddress must be set to the return point from realmode
+ * bx must be set to the ID of the realmode function to call. */
SwitchToReal:
/* Set sane segments */
mov ax, PMODE_DS
Modified: trunk/reactos/boot/freeldr/freeldr/arch/i386/i386idt.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/boot/freeldr/freeldr/arch/…
==============================================================================
--- trunk/reactos/boot/freeldr/freeldr/arch/i386/i386idt.c [iso-8859-1] (original)
+++ trunk/reactos/boot/freeldr/freeldr/arch/i386/i386idt.c [iso-8859-1] Thu Jun 16
22:11:53 2011
@@ -3,7 +3,7 @@
KIDTENTRY DECLSPEC_ALIGN(4) i386Idt[32];
-KDESCRIPTOR i386IdtDescriptor = {0, 255, i386Idt};
+KDESCRIPTOR i386IdtDescriptor = {0, 255, (ULONG)i386Idt};
static
void
Modified: trunk/reactos/boot/freeldr/freeldr/arch/i386/realmode.S
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/boot/freeldr/freeldr/arch/…
==============================================================================
--- trunk/reactos/boot/freeldr/freeldr/arch/i386/realmode.S [iso-8859-1] (original)
+++ trunk/reactos/boot/freeldr/freeldr/arch/i386/realmode.S [iso-8859-1] Thu Jun 16
22:11:53 2011
@@ -20,17 +20,11 @@
PUBLIC _lowmem_pagetable
_lowmem_pagetable:
-PUBLIC _ChainLoadBiosBootSectorCode
-_ChainLoadBiosBootSectorCode:
-
PUBLIC _BootOldLinuxKernel
_BootOldLinuxKernel:
PUBLIC _BootNewLinuxKernel
_BootNewLinuxKernel:
-
-PUBLIC _SoftReboot
-_SoftReboot:
PUBLIC _DriveMapOldInt13HandlerAddress
_DriveMapOldInt13HandlerAddress:
@@ -53,7 +47,4 @@
PUBLIC _PnpBiosSupported
_PnpBiosSupported:
-PUBLIC _PxeCallApi
-_PxeCallApi:
-
END
Modified: trunk/reactos/boot/freeldr/freeldr/arch/realmode/helpers.inc
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/boot/freeldr/freeldr/arch/…
==============================================================================
--- trunk/reactos/boot/freeldr/freeldr/arch/realmode/helpers.inc [iso-8859-1] (original)
+++ trunk/reactos/boot/freeldr/freeldr/arch/realmode/helpers.inc [iso-8859-1] Thu Jun 16
22:11:53 2011
@@ -102,3 +102,19 @@
/* and jump to location FFFF:0 in ROM */
ljmp16 HEX(0FFFF), HEX(0000)
+
+
+ChainLoadBiosBootSectorCode:
+
+ /* Load segment registers */
+ cli
+ xor ax, ax
+ mov ds, ax
+ mov es, ax
+ mov fs, ax
+ mov gs, ax
+ mov ss, ax
+ mov esp, HEX(7C00)
+
+ /* Jump to the bootsector code */
+ ljmp16 HEX(0000), HEX(7C00)
Modified: trunk/reactos/boot/freeldr/freeldr/arch/realmode/i386.S
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/boot/freeldr/freeldr/arch/…
==============================================================================
--- trunk/reactos/boot/freeldr/freeldr/arch/realmode/i386.S [iso-8859-1] (original)
+++ trunk/reactos/boot/freeldr/freeldr/arch/realmode/i386.S [iso-8859-1] Thu Jun 16
22:11:53 2011
@@ -121,10 +121,13 @@
.word 0 // receives address of PE entry point
.word PMODE_CS
nop
-
+// FIXME: use ljmp16 PMODE_CS:inpmode + hexed 32bit jump
callback_table:
.word Int386
+ .word SoftReboot
+ .word ChainLoadBiosBootSectorCode
+ .word PxeCallApi
/* 16-bit stack pointer */
Modified: trunk/reactos/boot/freeldr/freeldr/include/arch/pc/x86common.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/boot/freeldr/freeldr/inclu…
==============================================================================
--- trunk/reactos/boot/freeldr/freeldr/include/arch/pc/x86common.h [iso-8859-1]
(original)
+++ trunk/reactos/boot/freeldr/freeldr/include/arch/pc/x86common.h [iso-8859-1] Thu Jun 16
22:11:53 2011
@@ -22,13 +22,23 @@
#define DISKREADBUFFER_SIZE 512
/* These addresses specify the realmode "BSS section" layout */
-#define BSS_RealModeEntry (BSS_START + 0)
-#define BSS_CallbackAddress (BSS_START + 4)
-#define BSS_CallbackReturn (BSS_START + 8)
+#define BSS_RealModeEntry (BSS_START + 0)
+#define BSS_CallbackAddress (BSS_START + 4)
+#define BSS_CallbackReturn (BSS_START + 8)
+#define BSS_RegisterSet (BSS_START + 16) /* size = 36 */
+#define BSS_IntVector (BSS_START + 52)
+#define BSS_PxeEntryPoint (BSS_START + 56)
+#define BSS_PxeBufferSegment (BSS_START + 60)
+#define BSS_PxeBufferOffset (BSS_START + 64)
+#define BSS_PxeFunction (BSS_START + 68)
+#define BSS_PxeResult (BSS_START + 72)
-#define BSS_RegisterSet (BSS_START + 16) /* size = 36 */
-#define BSS_IntVector (BSS_START + 52)
-// next 52
+
+/* Realmode function IDs */
+#define FNID_Int386 0
+#define FNID_SoftReboot 1
+#define FNID_ChainLoadBiosBootSectorCode 2
+#define FNID_PxeCallApi 3
/* Layout of the REGS structure */
#define REGS_EAX 0
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