[coreboot] [v2] r4915 - trunk/util/x86emu
svn at coreboot.org
svn at coreboot.org
Thu Nov 5 18:24:03 CET 2009
Author: stepan
Date: 2009-11-05 17:24:03 +0000 (Thu, 05 Nov 2009)
New Revision: 4915
Removed:
trunk/util/x86emu/pcbios/
Modified:
trunk/util/x86emu/Config.lb
trunk/util/x86emu/Makefile
trunk/util/x86emu/Makefile.inc
trunk/util/x86emu/biosemu.c
Log:
biosemu (non-yabel) cleanup
* Drop pcbios folder that only exists for a single function
* include int1a handler in biosemu.c
* Wipe a lot of dead code, and set up F segment correctly
* include return value check from yabel.
On the long run we should teach yabel to be able to run with a reduced feature
set, ie. no emulation of (almost) all system hardware. Then we could drop the
non-yabel x86emu.
But for now this patch cleans up the non-yabel biosemu.c to a state where it's
not all that ugly anymore..
Signed-off-by: Stefan Reinauer <stepan at coresystems.de>
Acked-by: Myles Watson <mylesgw at gmail.com>
Modified: trunk/util/x86emu/Config.lb
===================================================================
--- trunk/util/x86emu/Config.lb 2009-11-05 12:44:50 UTC (rev 4914)
+++ trunk/util/x86emu/Config.lb 2009-11-05 17:24:03 UTC (rev 4915)
@@ -11,7 +11,6 @@
object x86_asm.S
else
object biosemu.o
- dir pcbios
dir x86emu
end
end
Modified: trunk/util/x86emu/Makefile
===================================================================
--- trunk/util/x86emu/Makefile 2009-11-05 12:44:50 UTC (rev 4914)
+++ trunk/util/x86emu/Makefile 2009-11-05 17:24:03 UTC (rev 4915)
@@ -22,7 +22,7 @@
X86EMU_SRC = debug.c decode.c fpu.c ops.c ops2.c prim_ops.c sys.c
ifeq ($(CONFIG_PCI_OPTION_ROM_RUN_X86EMU),y)
-BIOSEMU_SRC = biosemu.c pcbios/pcibios.c
+BIOSEMU_SRC = biosemu.c
endif
ifeq ($(CONFIG_PCI_OPTION_ROM_RUN_YABEL),y)
Modified: trunk/util/x86emu/Makefile.inc
===================================================================
--- trunk/util/x86emu/Makefile.inc 2009-11-05 12:44:50 UTC (rev 4914)
+++ trunk/util/x86emu/Makefile.inc 2009-11-05 17:24:03 UTC (rev 4915)
@@ -20,7 +20,6 @@
subdirs-$(CONFIG_PCI_OPTION_ROM_RUN_X86EMU) += x86emu
obj-$(CONFIG_PCI_OPTION_ROM_RUN_X86EMU) += biosemu.o
-subdirs-$(CONFIG_PCI_OPTION_ROM_RUN_X86EMU) += pcbios
obj-$(CONFIG_PCI_OPTION_ROM_RUN_REALMODE) += x86.o
obj-$(CONFIG_PCI_OPTION_ROM_RUN_REALMODE) += x86_asm.o
Modified: trunk/util/x86emu/biosemu.c
===================================================================
--- trunk/util/x86emu/biosemu.c 2009-11-05 12:44:50 UTC (rev 4914)
+++ trunk/util/x86emu/biosemu.c 2009-11-05 17:24:03 UTC (rev 4915)
@@ -36,6 +36,7 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#include <string.h>
#ifdef CONFIG_COREBOOT_V2
#include <arch/io.h>
#include <console/console.h>
@@ -47,11 +48,40 @@
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
-
#include <x86emu/x86emu.h>
+#include "x86emu/prim_ops.h"
-#include "pcbios/pcibios.h"
+#define DATA_SEGMENT 0x2000
+#define STACK_SEGMENT 0x1000 //1000:xxxx
+#define STACK_START_OFFSET 0xfffe
+#define INITIAL_EBDA_SEGMENT 0xF600 // segment of the Extended BIOS Data Area
+#define INITIAL_EBDA_SIZE 0x400 // size of the EBDA (at least 1KB!! since size is stored in KB!)
+enum {
+ PCI_BIOS_PRESENT = 0xB101,
+ FIND_PCI_DEVICE = 0xB102,
+ FIND_PCI_CLASS_CODE = 0xB103,
+ GENERATE_SPECIAL_CYCLE = 0xB106,
+ READ_CONFIG_BYTE = 0xB108,
+ READ_CONFIG_WORD = 0xB109,
+ READ_CONFIG_DWORD = 0xB10A,
+ WRITE_CONFIG_BYTE = 0xB10B,
+ WRITE_CONFIG_WORD = 0xB10C,
+ WRITE_CONFIG_DWORD = 0xB10D,
+ GET_IRQ_ROUTING_OPTIONS = 0xB10E,
+ SET_PCI_IRQ = 0xB10F
+};
+
+enum {
+ SUCCESSFUL = 0x00,
+ FUNC_NOT_SUPPORTED = 0x81,
+ BAD_VENDOR_ID = 0x83,
+ DEVICE_NOT_FOUND = 0x86,
+ BAD_REGISTER_NUMBER = 0x87,
+ SET_FAILED = 0x88,
+ BUFFER_TOO_SMALL = 0x89
+};
+
#define MEM_WB(where, what) wrb(where, what)
#define MEM_WW(where, what) wrw(where, what)
#define MEM_WL(where, what) wrl(where, what)
@@ -60,45 +90,8 @@
#define MEM_RW(where) rdw(where)
#define MEM_RL(where) rdl(where)
-u8 x_inb(u16 port);
-u16 x_inw(u16 port);
-void x_outb(u16 port, u8 val);
-void x_outw(u16 port, u16 val);
-u32 x_inl(u16 port);
-void x_outl(u16 port, u32 val);
-
-//
-void X86EMU_setMemBase(void *base, size_t size);
-
-/* general software interrupt handler */
-u32 getIntVect(int num)
+static u8 biosemu_inb(u16 port)
{
- return MEM_RW(num << 2) + (MEM_RW((num << 2) + 2) << 4);
-}
-
-/* FIXME: There is already a push_word() in the emulator */
-void pushw(u16 val)
-{
- X86_ESP -= 2;
- MEM_WW(((u32) X86_SS << 4) + X86_SP, val);
-}
-
-int run_bios_int(int num)
-{
- u32 eflags;
-
- eflags = X86_EFLAGS;
- pushw(eflags);
- pushw(X86_CS);
- pushw(X86_IP);
- X86_CS = MEM_RW((num << 2) + 2);
- X86_IP = MEM_RW(num << 2);
-
- return 1;
-}
-
-u8 x_inb(u16 port)
-{
u8 val;
val = inb(port);
@@ -110,7 +103,7 @@
return val;
}
-u16 x_inw(u16 port)
+static u16 biosemu_inw(u16 port)
{
u16 val;
@@ -122,7 +115,7 @@
return val;
}
-u32 x_inl(u16 port)
+static u32 biosemu_inl(u16 port)
{
u32 val;
@@ -134,7 +127,7 @@
return val;
}
-void x_outb(u16 port, u8 val)
+static void biosemu_outb(u16 port, u8 val)
{
#ifdef CONFIG_DEBUG
if (port != 0x43)
@@ -143,7 +136,7 @@
outb(val, port);
}
-void x_outw(u16 port, u16 val)
+static void biosemu_outw(u16 port, u16 val)
{
#ifdef CONFIG_DEBUG
printk("outw(0x%04x, 0x%04x)\n", val, port);
@@ -151,7 +144,7 @@
outw(val, port);
}
-void x_outl(u16 port, u32 val)
+static void biosemu_outl(u16 port, u32 val)
{
#ifdef CONFIG_DEBUG
printk("outl(0x%08x, 0x%04x)\n", val, port);
@@ -159,23 +152,245 @@
outl(val, port);
}
-X86EMU_pioFuncs myfuncs = {
- x_inb, x_inw, x_inl,
- x_outb, x_outw, x_outl
+static X86EMU_pioFuncs biosemu_piofuncs = {
+ biosemu_inb, biosemu_inw, biosemu_inl,
+ biosemu_outb, biosemu_outw, biosemu_outl
};
+/* Interrupt Handlers */
+static int int15_handler(void)
+{
+ /* This int15 handler is VIA Tech. and Intel specific. Other chipsets need other
+ * handlers. The right way to do this is to move this handler code into
+ * the mainboard or northbridge code.
+ */
+ switch (X86_AX) {
+ case 0x5f19:
+ X86_EFLAGS |= FB_CF; /* set carry flag */
+ break;
+ case 0x5f18:
+ X86_EAX = 0x5f;
+ // MCLK = 133, 32M frame buffer, 256 M main memory
+ X86_EBX = 0x545;
+ X86_ECX = 0x060;
+ X86_EFLAGS &= ~FB_CF;
+ break;
+ case 0x5f00:
+ X86_EAX = 0x8600;
+ X86_EFLAGS |= FB_CF; /* set carry flag */
+ break;
+ case 0x5f01:
+ X86_EAX = 0x5f;
+ X86_ECX = (X86_ECX & 0xffffff00 ) | 2; // panel type = 2 = 1024 * 768
+ X86_EFLAGS &= ~FB_CF;
+ break;
+ case 0x5f02:
+ X86_EAX = 0x5f;
+ X86_EBX = (X86_EBX & 0xffff0000) | 2;
+ X86_ECX = (X86_ECX & 0xffff0000) | 0x401; // PAL + crt only
+ X86_EDX = (X86_EDX & 0xffff0000) | 0; // TV Layout - default
+ X86_EFLAGS &= ~FB_CF;
+ break;
+ case 0x5f0f:
+ X86_EAX = 0x860f;
+ X86_EFLAGS |= FB_CF; /* set carry flag */
+ break;
+ /* And now Intel IGD code */
+#define BOOT_DISPLAY_DEFAULT 0
+#define BOOT_DISPLAY_CRT (1 << 0)
+#define BOOT_DISPLAY_TV (1 << 1)
+#define BOOT_DISPLAY_EFP (1 << 2)
+#define BOOT_DISPLAY_LCD (1 << 3)
+#define BOOT_DISPLAY_CRT2 (1 << 4)
+#define BOOT_DISPLAY_TV2 (1 << 5)
+#define BOOT_DISPLAY_EFP2 (1 << 6)
+#define BOOT_DISPLAY_LCD2 (1 << 7)
+ case 0x5f35:
+ X86_EAX = 0x5f;
+ X86_ECX = BOOT_DISPLAY_DEFAULT;
+ X86_EFLAGS &= ~FB_CF;
+ break;
+ case 0x5f40:
+ X86_EAX = 0x5f;
+ X86_ECX = 3; // This is mainboard specific
+ printk("DISPLAY=%x\n", X86_ECX);
+ X86_EFLAGS &= ~FB_CF;
+ break;
+ default:
+ printk("Unknown INT15 function %04x!\n", X86_AX);
+ X86_EFLAGS |= FB_CF; /* set carry flag */
+ }
+
+ return 1;
+}
+
+static int int1a_handler(void)
+{
+ int ret = 0;
+ struct device *dev = 0;
+
+ switch (X86_AX) {
+ case PCI_BIOS_PRESENT:
+ X86_AH = 0x00; /* no config space/special cycle support */
+ X86_AL = 0x01; /* config mechanism 1 */
+ X86_EDX = 'P' | 'C' << 8 | 'I' << 16 | ' ' << 24;
+ X86_EBX = 0x0210; /* Version 2.10 */
+ X86_ECX = 0xFF00; /* FIXME: Max bus number */
+ X86_EFLAGS &= ~FB_CF; /* clear carry flag */
+ ret = 1;
+ break;
+ case FIND_PCI_DEVICE:
+ /* FIXME: support SI != 0 */
+#ifdef CONFIG_COREBOOT_V2
+ dev = dev_find_device(X86_DX, X86_CX, dev);
+#else
+ dev = dev_find_pci_device(X86_DX, X86_CX, dev);
+#endif
+ if (dev != 0) {
+ X86_BH = dev->bus->secondary;
+ X86_BL = dev->path.pci.devfn;
+ X86_AH = SUCCESSFUL;
+ X86_EFLAGS &= ~FB_CF; /* clear carry flag */
+ ret = 1;
+ } else {
+ X86_AH = DEVICE_NOT_FOUND;
+ X86_EFLAGS |= FB_CF; /* set carry flag */
+ ret = 0;
+ }
+ break;
+ case FIND_PCI_CLASS_CODE:
+ /* FixME: support SI != 0 */
+ dev = dev_find_class(X86_ECX, dev);
+ if (dev != 0) {
+ X86_BH = dev->bus->secondary;
+ X86_BL = dev->path.pci.devfn;
+ X86_AH = SUCCESSFUL;
+ X86_EFLAGS &= ~FB_CF; /* clear carry flag */
+ ret = 1;
+ } else {
+ X86_AH = DEVICE_NOT_FOUND;
+ X86_EFLAGS |= FB_CF; /* set carry flag */
+ ret = 0;
+ }
+ break;
+ case READ_CONFIG_BYTE:
+ dev = dev_find_slot(X86_BH, X86_BL);
+ if (dev != 0) {
+ X86_CL = pci_read_config8(dev, X86_DI);
+ X86_AH = SUCCESSFUL;
+ X86_EFLAGS &= ~FB_CF; /* clear carry flag */
+ ret = 1;
+ } else {
+ X86_AH = DEVICE_NOT_FOUND;
+ X86_EFLAGS |= FB_CF; /* set carry flag */
+ ret = 0;
+ }
+ break;
+ case READ_CONFIG_WORD:
+ dev = dev_find_slot(X86_BH, X86_BL);
+ if (dev != 0) {
+ X86_CX = pci_read_config16(dev, X86_DI);
+ X86_AH = SUCCESSFUL;
+ X86_EFLAGS &= ~FB_CF; /* clear carry flag */
+ ret = 1;
+ } else {
+ X86_AH = DEVICE_NOT_FOUND;
+ X86_EFLAGS |= FB_CF; /* set carry flag */
+ ret = 0;
+ }
+ break;
+ case READ_CONFIG_DWORD:
+ dev = dev_find_slot(X86_BH, X86_BL);
+ if (dev != 0) {
+ X86_ECX = pci_read_config32(dev, X86_DI);
+ X86_AH = SUCCESSFUL;
+ X86_EFLAGS &= ~FB_CF; /* clear carry flag */
+ ret = 1;
+ } else {
+ X86_AH = DEVICE_NOT_FOUND;
+ X86_EFLAGS |= FB_CF; /* set carry flag */
+ ret = 0;
+ }
+ break;
+ case WRITE_CONFIG_BYTE:
+ dev = dev_find_slot(X86_BH, X86_BL);
+ if (dev != 0) {
+ pci_write_config8(dev, X86_DI, X86_CL);
+ X86_AH = SUCCESSFUL;
+ X86_EFLAGS &= ~FB_CF; /* clear carry flag */
+ ret = 1;
+ } else {
+ X86_AH = DEVICE_NOT_FOUND;
+ X86_EFLAGS |= FB_CF; /* set carry flag */
+ ret = 0;
+ }
+ break;
+ case WRITE_CONFIG_WORD:
+ dev = dev_find_slot(X86_BH, X86_BL);
+ if (dev != 0) {
+ pci_write_config16(dev, X86_DI, X86_CX);
+ X86_AH = SUCCESSFUL;
+ X86_EFLAGS &= ~FB_CF; /* clear carry flag */
+ ret = 1;
+ } else {
+ X86_AH = DEVICE_NOT_FOUND;
+ X86_EFLAGS |= FB_CF; /* set carry flag */
+ ret = 0;
+ }
+ break;
+ case WRITE_CONFIG_DWORD:
+ dev = dev_find_slot(X86_BH, X86_BL);
+ if (dev != 0) {
+ pci_write_config16(dev, X86_DI, X86_ECX);
+ X86_AH = SUCCESSFUL;
+ X86_EFLAGS &= ~FB_CF; /* clear carry flag */
+ ret = 1;
+ } else {
+ X86_AH = DEVICE_NOT_FOUND;
+ X86_EFLAGS |= FB_CF; /* set carry flag */
+ ret = 0;
+ }
+ break;
+ default:
+ X86_AH = FUNC_NOT_SUPPORTED;
+ X86_EFLAGS |= FB_CF;
+ break;
+ }
+
+ return ret;
+}
+
/* Interrupt multiplexer */
-void do_int(int num)
+/* Find base address of interrupt handler */
+static u32 getIntVect(int num)
{
+ return MEM_RW(num << 2) + (MEM_RW((num << 2) + 2) << 4);
+}
+
+static int run_bios_int(int num)
+{
+ u32 eflags;
+
+ eflags = X86_EFLAGS;
+ push_word(eflags);
+ push_word(X86_CS);
+ push_word(X86_IP);
+ X86_CS = MEM_RW((num << 2) + 2);
+ X86_IP = MEM_RW(num << 2);
+
+ return 1;
+}
+
+static void do_int(int num)
+{
int ret = 0;
- printk("int%x vector at %x\n", num, getIntVect(num));
+ printk("int%x (AX=%04x) vector at %x\n", num, X86_AX, getIntVect(num));
switch (num) {
-#ifndef _PC
case 0x10:
case 0x42:
case 0x6D:
@@ -188,9 +403,8 @@
ret = 1;
}
break;
-#endif
case 0x15:
- //ret = int15_handler();
+ ret = int15_handler();
ret = 1;
break;
case 0x16:
@@ -198,7 +412,7 @@
ret = 0;
break;
case 0x1A:
- ret = pcibios_handler();
+ ret = int1a_handler();
ret = 1;
break;
case 0xe6:
@@ -214,159 +428,124 @@
}
-#if 0
-#define SYS_BIOS 0xf0000
/*
* here we are really paranoid about faking a "real"
* BIOS. Most of this information was pulled from
* dosemu.
*/
-#if 0
-void setup_int_vect(void)
+static void setup_system_bios(void)
{
int i;
- /* let the int vects point to the SYS_BIOS seg */
- for (i = 0; i < 0x80; i++) {
- MEM_WW(i << 2, 0);
- MEM_WW((i << 2) + 2, SYS_BIOS >> 4);
- }
+ /* Set up Interrupt Vectors. The IVT starts at 0x0000:0x0000
+ * Additionally, we put some stub code into the F segment for
+ * those pesky little buggers that jmp to the hard coded addresses
+ * instead of calling int XX. This stub code looks like this
+ *
+ * CD XX int 0xXX
+ * C3 ret
+ * F4 hlt
+ */
- reset_int_vect();
-
- /* font tables default location (int 1F) */
- MEM_WW(0x1f << 2, 0xfa6e);
+ /* int 05 default location (Bound Exceeded) */
+ MEM_WL(0x05 << 2, 0xf000ff54);
+ MEM_WL(0xfff54, 0xf4c305cd);
+ /* int 08 default location (Double Fault) */
+ MEM_WL(0x08 << 2, 0xf000fea5);
+ MEM_WL(0xffea5, 0xf4c308cd);
+ /* int 0E default location (Page Fault) */
+ MEM_WL(0x0e << 2, 0xf000ef57);
+ MEM_WL(0xfef57, 0xf4c30ecd);
+ /* int 10 default location */
+ MEM_WL(0x10 << 2, 0xf000f065);
+ MEM_WL(0xff065, 0xf4c310cd);
/* int 11 default location (Get Equipment Configuration) */
- MEM_WW(0x11 << 2, 0xf84d);
+ MEM_WL(0x11 << 2, 0xf000f84d);
+ MEM_WL(0xff84d, 0xf4c311cd);
/* int 12 default location (Get Conventional Memory Size) */
- MEM_WW(0x12 << 2, 0xf841);
+ MEM_WL(0x12 << 2, 0xf000f841);
+ MEM_WL(0xff841, 0xf4c312cd);
+ /* int 13 default location (Disk) */
+ MEM_WL(0x13 << 2, 0xf000ec59);
+ MEM_WL(0xfec59, 0xf4c313cd);
+ /* int 14 default location (Disk) */
+ MEM_WL(0x14 << 2, 0xf000e739);
+ MEM_WL(0xfe739, 0xf4c314cd);
/* int 15 default location (I/O System Extensions) */
- MEM_WW(0x15 << 2, 0xf859);
+ MEM_WL(0x15 << 2, 0xf000f859);
+ MEM_WL(0xf859, 0xf4c315cd);
+ /* int 16 default location */
+ MEM_WL(0x16 << 2, 0xf000e82e);
+ MEM_WL(0xfe82e, 0xf4c316cd);
+ /* int 17 default location (Parallel Port) */
+ MEM_WL(0x17 << 2, 0xf000efd2);
+ MEM_WL(0xfefd2, 0xf4c317cd);
/* int 1A default location (RTC, PCI and others) */
- MEM_WW(0x1a << 2, 0xff6e);
- /* int 05 default location (Bound Exceeded) */
- MEM_WW(0x05 << 2, 0xff54);
- /* int 08 default location (Double Fault) */
- MEM_WW(0x08 << 2, 0xfea5);
- /* int 13 default location (Disk) */
- MEM_WW(0x13 << 2, 0xec59);
- /* int 0E default location (Page Fault) */
- MEM_WW(0x0e << 2, 0xef57);
- /* int 17 default location (Parallel Port) */
- MEM_WW(0x17 << 2, 0xefd2);
- /* fdd table default location (int 1e) */
- MEM_WW(0x1e << 2, 0xefc7);
+ MEM_WL(0x1a << 2, 0xf000fe6e);
+ MEM_WL(0xffe6e, 0xf4c31acd);
+ /* int 1E default location (FDD table) */
+ MEM_WL(0x1e << 2, 0xf000efc7);
+ MEM_WL(0xfefc7, 0xf4c31ecd);
+ /* font tables default location (int 1F) */
+ MEM_WL(0x1f << 2, 0xf000fa6e);
+ MEM_WL(0xffa6e, 0xf4c31fcd);
+ /* int 42 default location */
+ MEM_WL(0x42 << 2, 0xf000f065);
+ /* int 6D default location */
+ MEM_WL(0x6D << 2, 0xf000f065);
- /* Set Equipment flag to VGA */
- i = MEM_RB(0x0410) & 0xCF;
- MEM_WB(0x0410, i);
- /* XXX Perhaps setup more of the BDA here. See also int42(0x00). */
-}
+ /* Clear EBDA */
+ for (i=(INITIAL_EBDA_SEGMENT << 4);
+ i<(INITIAL_EBDA_SEGMENT << 4) + INITIAL_EBDA_SIZE; i++)
+ MEM_WB(i, 0);
+ /* at offset 0h in EBDA is the size of the EBDA in KB */
+ MEM_WW((INITIAL_EBDA_SEGMENT << 4) + 0x0, INITIAL_EBDA_SIZE / 1024);
-int setup_system_bios(void *base_addr)
-{
- char *base = (char *) base_addr;
+ /* Clear BDA */
+ for (i=0x400; i<0x500; i+=4)
+ MEM_WL(i, 0);
- /*
- * we trap the "industry standard entry points" to the BIOS
- * and all other locations by filling them with "hlt"
- * TODO: implement hlt-handler for these
- */
- memset(base, 0xf4, 0x10000);
+ /* Set up EBDA */
+ MEM_WW(0x40e, INITIAL_EBDA_SEGMENT);
- /* set bios date */
- //strcpy(base + 0x0FFF5, "06/11/99");
- /* set up eisa ident string */
- //strcpy(base + 0x0FFD9, "PCI_ISA");
- /* write system model id for IBM-AT */
- //*((unsigned char *) (base + 0x0FFFE)) = 0xfc;
+ /* Set RAM size to 16MB (fake) */
+ MEM_WW(0x413, 16384);
- return 1;
-}
-#endif
+ // TODO Set up more of BDA here
-void reset_int_vect(void)
-{
- /*
- * This table is normally located at 0xF000:0xF0A4. However, int 0x42,
- * function 0 (Mode Set) expects it (or a copy) somewhere in the bottom
- * 64kB. Note that because this data doesn't survive POST, int 0x42 should
- * only be used during EGA/VGA BIOS initialisation.
- */
- static const u8 VideoParms[] = {
- /* Timing for modes 0x00 & 0x01 */
- 0x38, 0x28, 0x2d, 0x0a, 0x1f, 0x06, 0x19, 0x1c,
- 0x02, 0x07, 0x06, 0x07, 0x00, 0x00, 0x00, 0x00,
- /* Timing for modes 0x02 & 0x03 */
- 0x71, 0x50, 0x5a, 0x0a, 0x1f, 0x06, 0x19, 0x1c,
- 0x02, 0x07, 0x06, 0x07, 0x00, 0x00, 0x00, 0x00,
- /* Timing for modes 0x04, 0x05 & 0x06 */
- 0x38, 0x28, 0x2d, 0x0a, 0x7f, 0x06, 0x64, 0x70,
- 0x02, 0x01, 0x06, 0x07, 0x00, 0x00, 0x00, 0x00,
- /* Timing for mode 0x07 */
- 0x61, 0x50, 0x52, 0x0f, 0x19, 0x06, 0x19, 0x19,
- 0x02, 0x0d, 0x0b, 0x0c, 0x00, 0x00, 0x00, 0x00,
- /* Display page lengths in little endian order */
- 0x00, 0x08, /* Modes 0x00 and 0x01 */
- 0x00, 0x10, /* Modes 0x02 and 0x03 */
- 0x00, 0x40, /* Modes 0x04 and 0x05 */
- 0x00, 0x40, /* Modes 0x06 and 0x07 */
- /* Number of columns for each mode */
- 40, 40, 80, 80, 40, 40, 80, 80,
- /* CGA Mode register value for each mode */
- 0x2c, 0x28, 0x2d, 0x29, 0x2a, 0x2e, 0x1e, 0x29,
- /* Padding */
- 0x00, 0x00, 0x00, 0x00
- };
- int i;
+ /* setup original ROM BIOS Area (F000:xxxx) */
+ const char *date = "06/23/99";
+ for (i = 0; date[i]; i++)
+ MEM_WB(0xffff5 + i, date[i]);
+ /* set up eisa ident string */
+ const char *ident = "PCI_ISA";
+ for (i = 0; ident[i]; i++)
+ MEM_WB(0xfffd9 + i, ident[i]);
- for (i = 0; i < sizeof(VideoParms); i++)
- MEM_WB(i + (0x1000 - sizeof(VideoParms)), VideoParms[i]);
- MEM_WW(0x1d << 2, 0x1000 - sizeof(VideoParms));
- MEM_WW((0x1d << 2) + 2, 0);
-
- printk(BIOS_DEBUG,"SETUP INT\n");
- MEM_WW(0x10 << 2, 0xf065);
- MEM_WW((0x10 << 2) + 2, SYS_BIOS >> 4);
- MEM_WW(0x42 << 2, 0xf065);
- MEM_WW((0x42 << 2) + 2, SYS_BIOS >> 4);
- MEM_WW(0x6D << 2, 0xf065);
- MEM_WW((0x6D << 2) + 2, SYS_BIOS >> 4);
+ // write system model id for IBM-AT
+ // according to "Ralf Browns Interrupt List" Int15 AH=C0 Table 515,
+ // model FC is the original AT and also used in all DOSEMU Versions.
+ MEM_WB(0xFFFFE, 0xfc);
}
-#endif
+#define BIOSEMU_MEM_BASE 0x00000000
+#define BIOSEMU_MEM_SIZE 0x00100000
void run_bios(struct device * dev, unsigned long addr)
{
-#if 1
int i;
- unsigned short initialcs = (addr & 0xF0000) >> 4;
- unsigned short initialip = (addr + 3) & 0xFFFF;
- unsigned short devfn = dev->bus->secondary << 8 | dev->path.pci.devfn;
-
+ u16 initialcs = (addr & 0xF0000) >> 4;
+ u16 initialip = (addr + 3) & 0xFFFF;
+ u16 devfn = (dev->bus->secondary << 8) | dev->path.pci.devfn;
X86EMU_intrFuncs intFuncs[256];
- X86EMU_setMemBase(0, 0x100000);
- X86EMU_setupPioFuncs(&myfuncs);
+ X86EMU_setMemBase(BIOSEMU_MEM_BASE, BIOSEMU_MEM_SIZE);
+ X86EMU_setupPioFuncs(&biosemu_piofuncs);
for (i = 0; i < 256; i++)
intFuncs[i] = do_int;
X86EMU_setupIntrFuncs(intFuncs);
- {
- char *date = "01/01/99";
- for (i = 0; date[i]; i++)
- wrb(0xffff5 + i, date[i]);
- wrb(0xffff7, '/');
- wrb(0xffffa, '/');
- }
+ setup_system_bios();
- {
- /* FixME: move PIT init to its own file */
- outb(0x36, 0x43);
- outb(0x00, 0x40);
- outb(0x00, 0x40);
- }
- //setup_int_vect();
-
/* cpu setup */
X86_AX = devfn ? devfn : 0xff;
X86_DX = 0x80;
@@ -374,26 +553,37 @@
X86_CS = initialcs;
/* Initialize stack and data segment */
- X86_SS = initialcs;
- X86_SP = 0xfffe;
- X86_DS = 0x0040;
- X86_ES = 0x0000;
+ X86_SS = STACK_SEGMENT;
+ X86_SP = STACK_START_OFFSET;;
+ X86_DS = DATA_SEGMENT;
/* We need a sane way to return from bios
* execution. A hlt instruction and a pointer
* to it, both kept on the stack, will do.
*/
- pushw(0xf4f4); /* hlt; hlt */
- pushw(X86_SS);
- pushw(X86_SP + 2);
+ push_word(0xf4f4); /* hlt; hlt */
+ push_word(X86_SS);
+ push_word(X86_SP + 2);
#ifdef CONFIG_DEBUG
//X86EMU_trace_on();
#endif
- printk("entering emulator\n");
+ printk("Executing Initialization Vector...\n");
X86EMU_exec();
- printk("exited emulator\n");
+ printk("Option ROM Exit Status: %04x\n", X86_AX);
-#endif
+ /* Check whether the stack is "clean" i.e. containing the HLT
+ * instruction we pushed before executing and pointing to the original
+ * stack address... indicating that the initialization probably was
+ * successful
+ */
+ if ((pop_word() == 0xf4f4) && (X86_SS == STACK_SEGMENT)
+ && (X86_SP == STACK_START_OFFSET)) {
+ printk("Stack is clean, initialization successfull!\n");
+ } else {
+ printk("Stack unclean, initialization probably NOT COMPLETE!!\n");
+ printk("SS:SP = %04x:%04x, expected: %04x:%04x\n",
+ X86_SS, X86_SP, STACK_SEGMENT, STACK_START_OFFSET);
+ }
}
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