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-rw-r--r--arch/i386/.gitignore1
-rw-r--r--arch/x86/Kconfig.cpu (renamed from arch/i386/Kconfig.cpu)0
-rw-r--r--arch/x86/Kconfig.debug (renamed from arch/i386/Kconfig.debug)51
-rw-r--r--arch/x86/Kconfig.i386 (renamed from arch/i386/Kconfig)4
-rw-r--r--arch/x86/Kconfig.x86_64 (renamed from arch/x86_64/Kconfig)2
-rw-r--r--arch/x86/Makefile16
-rw-r--r--arch/x86/Makefile_32 (renamed from arch/i386/Makefile)7
-rw-r--r--arch/x86/Makefile_32.cpu (renamed from arch/i386/Makefile.cpu)0
-rw-r--r--arch/x86/Makefile_64 (renamed from arch/x86_64/Makefile)5
-rw-r--r--arch/x86/boot/boot.h8
-rw-r--r--arch/x86/boot/header.S62
-rw-r--r--arch/x86/boot/video-bios.c2
-rw-r--r--arch/x86/boot/video-vesa.c2
-rw-r--r--arch/x86/boot/video.c2
-rw-r--r--arch/x86/configs/i386_defconfig (renamed from arch/i386/defconfig)0
-rw-r--r--arch/x86/configs/x86_64_defconfig (renamed from arch/x86_64/defconfig)0
-rw-r--r--arch/x86_64/.gitignore1
-rw-r--r--arch/x86_64/Kconfig.debug61
18 files changed, 114 insertions, 110 deletions
diff --git a/arch/i386/.gitignore b/arch/i386/.gitignore
deleted file mode 100644
index 36ef4c374d2..00000000000
--- a/arch/i386/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-boot
diff --git a/arch/i386/Kconfig.cpu b/arch/x86/Kconfig.cpu
index 0e2adadf590..0e2adadf590 100644
--- a/arch/i386/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
diff --git a/arch/i386/Kconfig.debug b/arch/x86/Kconfig.debug
index f03531eacdf..970b2defe7d 100644
--- a/arch/i386/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -1,14 +1,14 @@
menu "Kernel hacking"
config TRACE_IRQFLAGS_SUPPORT
- bool
- default y
+ def_bool y
source "lib/Kconfig.debug"
config EARLY_PRINTK
bool "Early printk" if EMBEDDED && DEBUG_KERNEL
default y
+ depends on X86_32
help
Write kernel log output directly into the VGA buffer or to a serial
port.
@@ -37,10 +37,12 @@ config DEBUG_STACK_USAGE
comment "Page alloc debug is incompatible with Software Suspend on i386"
depends on DEBUG_KERNEL && HIBERNATION
+ depends on X86_32
config DEBUG_PAGEALLOC
bool "Debug page memory allocations"
depends on DEBUG_KERNEL && !HIBERNATION && !HUGETLBFS
+ depends on X86_32
help
Unmap pages from the kernel linear mapping after free_pages().
This results in a large slowdown, but helps to find certain types
@@ -59,6 +61,7 @@ config DEBUG_RODATA
config 4KSTACKS
bool "Use 4Kb for kernel stacks instead of 8Kb"
depends on DEBUG_KERNEL
+ depends on X86_32
help
If you say Y here the kernel will use a 4Kb stacksize for the
kernel stack attached to each process/thread. This facilitates
@@ -67,22 +70,50 @@ config 4KSTACKS
will also use IRQ stacks to compensate for the reduced stackspace.
config X86_FIND_SMP_CONFIG
- bool
+ def_bool y
depends on X86_LOCAL_APIC || X86_VOYAGER
- default y
+ depends on X86_32
config X86_MPPARSE
- bool
+ def_bool y
depends on X86_LOCAL_APIC && !X86_VISWS
- default y
+ depends on X86_32
config DOUBLEFAULT
default y
bool "Enable doublefault exception handler" if EMBEDDED
+ depends on X86_32
+ help
+ This option allows trapping of rare doublefault exceptions that
+ would otherwise cause a system to silently reboot. Disabling this
+ option saves about 4k and might cause you much additional grey
+ hair.
+
+config IOMMU_DEBUG
+ bool "Enable IOMMU debugging"
+ depends on IOMMU && DEBUG_KERNEL
+ depends on X86_64
help
- This option allows trapping of rare doublefault exceptions that
- would otherwise cause a system to silently reboot. Disabling this
- option saves about 4k and might cause you much additional grey
- hair.
+ Force the IOMMU to on even when you have less than 4GB of
+ memory and add debugging code. On overflow always panic. And
+ allow to enable IOMMU leak tracing. Can be disabled at boot
+ time with iommu=noforce. This will also enable scatter gather
+ list merging. Currently not recommended for production
+ code. When you use it make sure you have a big enough
+ IOMMU/AGP aperture. Most of the options enabled by this can
+ be set more finegrained using the iommu= command line
+ options. See Documentation/x86_64/boot-options.txt for more
+ details.
+
+config IOMMU_LEAK
+ bool "IOMMU leak tracing"
+ depends on DEBUG_KERNEL
+ depends on IOMMU_DEBUG
+ help
+ Add a simple leak tracer to the IOMMU code. This is useful when you
+ are debugging a buggy device driver that leaks IOMMU mappings.
+
+#config X86_REMOTE_DEBUG
+# bool "kgdb debugging stub"
endmenu
diff --git a/arch/i386/Kconfig b/arch/x86/Kconfig.i386
index b4437ce0f97..7331efe891a 100644
--- a/arch/i386/Kconfig
+++ b/arch/x86/Kconfig.i386
@@ -287,7 +287,7 @@ config ES7000_CLUSTERED_APIC
default y
depends on SMP && X86_ES7000 && MPENTIUMIII
-source "arch/i386/Kconfig.cpu"
+source "arch/x86/Kconfig.cpu"
config HPET_TIMER
bool "HPET Timer Support"
@@ -1272,7 +1272,7 @@ source "fs/Kconfig"
source "kernel/Kconfig.instrumentation"
-source "arch/i386/Kconfig.debug"
+source "arch/x86/Kconfig.debug"
source "security/Kconfig"
diff --git a/arch/x86_64/Kconfig b/arch/x86/Kconfig.x86_64
index 308970aa538..e2542e5b536 100644
--- a/arch/x86_64/Kconfig
+++ b/arch/x86/Kconfig.x86_64
@@ -835,7 +835,7 @@ source fs/Kconfig
source "kernel/Kconfig.instrumentation"
-source "arch/x86_64/Kconfig.debug"
+source "arch/x86/Kconfig.debug"
source "security/Kconfig"
diff --git a/arch/x86/Makefile b/arch/x86/Makefile
new file mode 100644
index 00000000000..309597386a7
--- /dev/null
+++ b/arch/x86/Makefile
@@ -0,0 +1,16 @@
+# Unified Makefile for i386 and x86_64
+
+# select defconfig based on actual architecture
+KBUILD_DEFCONFIG := $(ARCH)_defconfig
+
+# # No need to remake these files
+$(srctree)/arch/x86/Makefile%: ;
+
+ifeq ($(ARCH),i386)
+ include $(srctree)/arch/x86/Makefile_32
+else
+ include $(srctree)/arch/x86/Makefile_64
+endif
+
+
+
diff --git a/arch/i386/Makefile b/arch/x86/Makefile_32
index f5b9a37def8..346ac076687 100644
--- a/arch/i386/Makefile
+++ b/arch/x86/Makefile_32
@@ -1,5 +1,5 @@
#
-# i386/Makefile
+# i386 Makefile
#
# This file is included by the global makefile so that you can add your own
# architecture-specific flags and dependencies. Remember to do have actions
@@ -17,9 +17,6 @@
# 20050320 Kianusch Sayah Karadji <kianusch@sk-tech.net>
# Added support for GEODE CPU
-# Fill in SRCARCH
-SRCARCH := x86
-
# BITS is used as extension for files which are available in a 32 bit
# and a 64 bit version to simplify shared Makefiles.
# e.g.: obj-y += foo_$(BITS).o
@@ -46,7 +43,7 @@ KBUILD_CFLAGS += -pipe -msoft-float -mregparm=3 -freg-struct-return
KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)
# CPU-specific tuning. Anything which can be shared with UML should go here.
-include $(srctree)/arch/i386/Makefile.cpu
+include $(srctree)/arch/x86/Makefile_32.cpu
# temporary until string.h is fixed
cflags-y += -ffreestanding
diff --git a/arch/i386/Makefile.cpu b/arch/x86/Makefile_32.cpu
index e372b584e91..e372b584e91 100644
--- a/arch/i386/Makefile.cpu
+++ b/arch/x86/Makefile_32.cpu
diff --git a/arch/x86_64/Makefile b/arch/x86/Makefile_64
index 20eb69bd5a6..57e714a47af 100644
--- a/arch/x86_64/Makefile
+++ b/arch/x86/Makefile_64
@@ -1,5 +1,5 @@
#
-# x86_64/Makefile
+# x86_64 Makefile
#
# This file is included by the global makefile so that you can add your own
# architecture-specific flags and dependencies. Remember to do have actions
@@ -21,9 +21,6 @@
#
# $Id: Makefile,v 1.31 2002/03/22 15:56:07 ak Exp $
-# Fill in SRCARCH
-SRCARCH := x86
-
# BITS is used as extension for files which are available in a 32 bit
# and a 64 bit version to simplify shared Makefiles.
# e.g.: obj-y += foo_$(BITS).o
diff --git a/arch/x86/boot/boot.h b/arch/x86/boot/boot.h
index 5f9a2e72a73..d2b5adf4651 100644
--- a/arch/x86/boot/boot.h
+++ b/arch/x86/boot/boot.h
@@ -17,6 +17,8 @@
#ifndef BOOT_BOOT_H
#define BOOT_BOOT_H
+#define STACK_SIZE 512 /* Minimum number of bytes for stack */
+
#ifndef __ASSEMBLY__
#include <stdarg.h>
@@ -198,8 +200,6 @@ static inline int isdigit(int ch)
}
/* Heap -- available for dynamic lists. */
-#define STACK_SIZE 512 /* Minimum number of bytes for stack */
-
extern char _end[];
extern char *HEAP;
extern char *heap_end;
@@ -216,9 +216,9 @@ static inline char *__get_heap(size_t s, size_t a, size_t n)
#define GET_HEAP(type, n) \
((type *)__get_heap(sizeof(type),__alignof__(type),(n)))
-static inline int heap_free(void)
+static inline bool heap_free(size_t n)
{
- return heap_end-HEAP;
+ return (int)(heap_end-HEAP) >= (int)n;
}
/* copy.S */
diff --git a/arch/x86/boot/header.S b/arch/x86/boot/header.S
index 8353c81c41c..6ef5a060fa1 100644
--- a/arch/x86/boot/header.S
+++ b/arch/x86/boot/header.S
@@ -173,7 +173,8 @@ ramdisk_size: .long 0 # its size in bytes
bootsect_kludge:
.long 0 # obsolete
-heap_end_ptr: .word _end+1024 # (Header version 0x0201 or later)
+heap_end_ptr: .word _end+STACK_SIZE-512
+ # (Header version 0x0201 or later)
# space from here (exclusive) down to
# end of setup code can be used by setup
# for local heap purposes.
@@ -230,28 +231,53 @@ start_of_setup:
int $0x13
#endif
-# We will have entered with %cs = %ds+0x20, normalize %cs so
-# it is on par with the other segments.
- pushw %ds
- pushw $setup2
- lretw
-
-setup2:
# Force %es = %ds
movw %ds, %ax
movw %ax, %es
cld
-# Stack paranoia: align the stack and make sure it is good
-# for both 16- and 32-bit references. In particular, if we
-# were meant to have been using the full 16-bit segment, the
-# caller might have set %sp to zero, which breaks %esp-based
-# references.
- andw $~3, %sp # dword align (might as well...)
- jnz 1f
- movw $0xfffc, %sp # Make sure we're not zero
-1: movzwl %sp, %esp # Clear upper half of %esp
- sti
+# Apparently some ancient versions of LILO invoked the kernel
+# with %ss != %ds, which happened to work by accident for the
+# old code. If the CAN_USE_HEAP flag is set in loadflags, or
+# %ss != %ds, then adjust the stack pointer.
+
+ # Smallest possible stack we can tolerate
+ movw $(_end+STACK_SIZE), %cx
+
+ movw heap_end_ptr, %dx
+ addw $512, %dx
+ jnc 1f
+ xorw %dx, %dx # Wraparound - whole segment available
+1: testb $CAN_USE_HEAP, loadflags
+ jnz 2f
+
+ # No CAN_USE_HEAP
+ movw %ss, %dx
+ cmpw %ax, %dx # %ds == %ss?
+ movw %sp, %dx
+ # If so, assume %sp is reasonably set, otherwise use
+ # the smallest possible stack.
+ jne 4f # -> Smallest possible stack...
+
+ # Make sure the stack is at least minimum size. Take a value
+ # of zero to mean "full segment."
+2:
+ andw $~3, %dx # dword align (might as well...)
+ jnz 3f
+ movw $0xfffc, %dx # Make sure we're not zero
+3: cmpw %cx, %dx
+ jnb 5f
+4: movw %cx, %dx # Minimum value we can possibly use
+5: movw %ax, %ss
+ movzwl %dx, %esp # Clear upper half of %esp
+ sti # Now we should have a working stack
+
+# We will have entered with %cs = %ds+0x20, normalize %cs so
+# it is on par with the other segments.
+ pushw %ds
+ pushw $6f
+ lretw
+6:
# Check signature at end of setup
cmpl $0x5a5aaa55, setup_sig
diff --git a/arch/x86/boot/video-bios.c b/arch/x86/boot/video-bios.c
index 68e65d95cdf..ed0672a8187 100644
--- a/arch/x86/boot/video-bios.c
+++ b/arch/x86/boot/video-bios.c
@@ -79,7 +79,7 @@ static int bios_probe(void)
video_bios.modes = GET_HEAP(struct mode_info, 0);
for (mode = 0x14; mode <= 0x7f; mode++) {
- if (heap_free() < sizeof(struct mode_info))
+ if (!heap_free(sizeof(struct mode_info)))
break;
if (mode_defined(VIDEO_FIRST_BIOS+mode))
diff --git a/arch/x86/boot/video-vesa.c b/arch/x86/boot/video-vesa.c
index 19219071071..4716b9a9635 100644
--- a/arch/x86/boot/video-vesa.c
+++ b/arch/x86/boot/video-vesa.c
@@ -57,7 +57,7 @@ static int vesa_probe(void)
while ((mode = rdfs16(mode_ptr)) != 0xffff) {
mode_ptr += 2;
- if (heap_free() < sizeof(struct mode_info))
+ if (!heap_free(sizeof(struct mode_info)))
break; /* Heap full, can't save mode info */
if (mode & ~0x1ff)
diff --git a/arch/x86/boot/video.c b/arch/x86/boot/video.c
index e4ba897bf9a..ad9712f0173 100644
--- a/arch/x86/boot/video.c
+++ b/arch/x86/boot/video.c
@@ -371,7 +371,7 @@ static void save_screen(void)
saved.curx = boot_params.screen_info.orig_x;
saved.cury = boot_params.screen_info.orig_y;
- if (heap_free() < saved.x*saved.y*sizeof(u16)+512)
+ if (!heap_free(saved.x*saved.y*sizeof(u16)+512))
return; /* Not enough heap to save the screen */
saved.data = GET_HEAP(u16, saved.x*saved.y);
diff --git a/arch/i386/defconfig b/arch/x86/configs/i386_defconfig
index 54ee1764fda..54ee1764fda 100644
--- a/arch/i386/defconfig
+++ b/arch/x86/configs/i386_defconfig
diff --git a/arch/x86_64/defconfig b/arch/x86/configs/x86_64_defconfig
index b091c5e3555..b091c5e3555 100644
--- a/arch/x86_64/defconfig
+++ b/arch/x86/configs/x86_64_defconfig
diff --git a/arch/x86_64/.gitignore b/arch/x86_64/.gitignore
deleted file mode 100644
index 36ef4c374d2..00000000000
--- a/arch/x86_64/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-boot
diff --git a/arch/x86_64/Kconfig.debug b/arch/x86_64/Kconfig.debug
deleted file mode 100644
index 775d211a5cf..00000000000
--- a/arch/x86_64/Kconfig.debug
+++ /dev/null
@@ -1,61 +0,0 @@
-menu "Kernel hacking"
-
-config TRACE_IRQFLAGS_SUPPORT
- bool
- default y
-
-source "lib/Kconfig.debug"
-
-config DEBUG_RODATA
- bool "Write protect kernel read-only data structures"
- depends on DEBUG_KERNEL
- help
- Mark the kernel read-only data as write-protected in the pagetables,
- in order to catch accidental (and incorrect) writes to such const data.
- This option may have a slight performance impact because a portion
- of the kernel code won't be covered by a 2MB TLB anymore.
- If in doubt, say "N".
-
-config IOMMU_DEBUG
- depends on IOMMU && DEBUG_KERNEL
- bool "Enable IOMMU debugging"
- help
- Force the IOMMU to on even when you have less than 4GB of
- memory and add debugging code. On overflow always panic. And
- allow to enable IOMMU leak tracing. Can be disabled at boot
- time with iommu=noforce. This will also enable scatter gather
- list merging. Currently not recommended for production
- code. When you use it make sure you have a big enough
- IOMMU/AGP aperture. Most of the options enabled by this can
- be set more finegrained using the iommu= command line
- options. See Documentation/x86_64/boot-options.txt for more
- details.
-
-config IOMMU_LEAK
- bool "IOMMU leak tracing"
- depends on DEBUG_KERNEL
- depends on IOMMU_DEBUG
- help
- Add a simple leak tracer to the IOMMU code. This is useful when you
- are debugging a buggy device driver that leaks IOMMU mappings.
-
-config DEBUG_STACKOVERFLOW
- bool "Check for stack overflows"
- depends on DEBUG_KERNEL
- help
- This option will cause messages to be printed if free stack space
- drops below a certain limit.
-
-config DEBUG_STACK_USAGE
- bool "Stack utilization instrumentation"
- depends on DEBUG_KERNEL
- help
- Enables the display of the minimum amount of free stack which each
- task has ever had available in the sysrq-T and sysrq-P debug output.
-
- This option will slow down process creation somewhat.
-
-#config X86_REMOTE_DEBUG
-# bool "kgdb debugging stub"
-
-endmenu
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-26 13:21:24 +0000