[patch] s2ram: kill old debugging junk

Pavel Machek
2007-08-16T12:52:31Z

This removes old debugging stuff, that should be no longer
neccessary. It accessed VGA hardware (which may not be ready at this
point), and used LEDs at port 80 for debugging.

Signed-off-by: Pavel Machek <pavel@suse.cz>

diff --git a/arch/i386/kernel/acpi/wakeup.S b/arch/i386/kernel/acpi/wakeup.S
index ed0a0f2..9cebef7 100644
--- a/arch/i386/kernel/acpi/wakeup.S
+++ b/arch/i386/kernel/acpi/wakeup.S
@@ -11,7 +11,7 @@ # Do we need to deal with A20? It is oka
#
# If physical address of wakeup_code is 0x12345, BIOS should call us with
# cs = 0x1234, eip = 0x05
-#
+#

#define BEEP \
inb $97, %al; \
@@ -52,7 +52,6 @@ wakeup_code:
BEEP
1:
mov $(wakeup_stack - wakeup_code), %sp # Private stack is needed for ASUS board
- movw $0x0e00 + 'S', %fs:(0x12)

pushl $0 # Kill any dangerous flags
popfl
@@ -90,9 +89,6 @@ wakeup_code:
# make sure %cr4 is set correctly (features, etc)
movl real_save_cr4 - wakeup_code, %eax
movl %eax, %cr4
- movw $0xb800, %ax
- movw %ax,%fs
- movw $0x0e00 + 'i', %fs:(0x12)

# need a gdt -- use lgdtl to force 32-bit operands, in case
# the GDT is located past 16 megabytes.
@@ -102,8 +98,6 @@ wakeup_code:
movl %eax, %cr0
jmp 1f
1:
- movw $0x0e00 + 'n', %fs:(0x14)
-
movl real_magic - wakeup_code, %eax
cmpl $0x12345678, %eax
jne bogus_real_magic
@@ -122,13 +116,11 @@ real_save_cr4: .long 0
real_magic: .long 0
video_mode: .long 0
realmode_flags: .long 0
-beep_flags: .long 0
real_efer_save_restore: .long 0
real_save_efer_edx: .long 0
real_save_efer_eax: .long 0

bogus_real_magic:
- movw $0x0e00 + 'B', %fs:(0x12)
jmp bogus_real_magic

/* This code uses an extended set of video mode numbers. These include:
@@ -153,29 +145,9 @@ #define VIDEO_FIRST_V7 0x0900
# Setting of user mode (AX=mode ID) => CF=success
mode_set:
movw %ax, %bx
-#if 0
- cmpb $0xff, %ah
- jz setalias
-
- testb $VIDEO_RECALC>>8, %ah
- jnz _setrec
-
- cmpb $VIDEO_FIRST_RESOLUTION>>8, %ah
- jnc setres
-
- cmpb $VIDEO_FIRST_SPECIAL>>8, %ah
- jz setspc
-
- cmpb $VIDEO_FIRST_V7>>8, %ah
- jz setv7
-#endif

cmpb $VIDEO_FIRST_VESA>>8, %ah
jnc check_vesa
-#if 0
- orb %ah, %ah
- jz setmenu
-#endif

decb %ah
# jz setbios Add bios modes later
@@ -215,7 +187,6 @@ wakeup_pmode_return:
movw %ax, %es
movw %ax, %fs
movw %ax, %gs
- movw $0x0e00 + 'u', 0xb8016

# reload the gdt, as we need the full 32 bit address
lgdt saved_gdt
@@ -239,7 +210,6 @@ wakeup_pmode_return:
jmp *%eax

bogus_magic:
- movw $0x0e00 + 'B', 0xb8018
jmp bogus_magic

diff --git a/arch/x86_64/kernel/acpi/wakeup.S b/arch/x86_64/kernel/acpi/wakeup.S
index 13f1480..fd09434 100644
--- a/arch/x86_64/kernel/acpi/wakeup.S
+++ b/arch/x86_64/kernel/acpi/wakeup.S
@@ -41,7 +41,6 @@ wakeup_code:

# Running in *copy* of this code, somewhere in low 1MB.

- movb $0xa1, %al ; outb %al, $0x80
cli
cld
# setup data segment
@@ -65,11 +64,6 @@ # Running in *copy* of this code, somewh
cmpl $0x12345678, %eax
jne bogus_real_magic

- call verify_cpu # Verify the cpu supports long
- # mode
- testl %eax, %eax
- jnz no_longmode
-
testl $1, realmode_flags - wakeup_code
jz 1f
lcall $0xc000,$3
@@ -84,12 +78,6 @@ # Running in *copy* of this code, somewh
call mode_seta
1:

- movw $0xb800, %ax
- movw %ax,%fs
- movw $0x0e00 + 'L', %fs:(0x10)
-
- movb $0xa2, %al ; outb %al, $0x80
-
mov %ds, %ax # Find 32bit wakeup_code addr
movzx %ax, %esi # (Convert %ds:gdt to a liner ptr)
shll $4, %esi
@@ -117,14 +105,10 @@ wakeup_32_vector:
.code32
wakeup_32:
# Running in this code, but at low address; paging is not yet turned on.
- movb $0xa5, %al ; outb %al, $0x80

movl $__KERNEL_DS, %eax
movl %eax, %ds

- movw $0x0e00 + 'i', %ds:(0xb8012)
- movb $0xa8, %al ; outb %al, $0x80;
-
/*
* Prepare for entering 64bits mode
*/
@@ -200,16 +184,11 @@ wakeup_long64:
*/
lgdt cpu_gdt_descr

- movw $0x0e00 + 'n', %ds:(0xb8014)
- movb $0xa9, %al ; outb %al, $0x80
-
movq saved_magic, %rax
movq $0x123456789abcdef0, %rdx
cmpq %rdx, %rax
jne bogus_64_magic

- movw $0x0e00 + 'u', %ds:(0xb8016)
-
nop
nop
movw $__KERNEL_DS, %ax
@@ -220,13 +199,11 @@ wakeup_long64:
movw %ax, %gs
movq saved_rsp, %rsp

- movw $0x0e00 + 'x', %ds:(0xb8018)
movq saved_rbx, %rbx
movq saved_rdi, %rdi
movq saved_rsi, %rsi
movq saved_rbp, %rbp

- movw $0x0e00 + '!', %ds:(0xb801a)
movq saved_rip, %rax
jmp *%rax

@@ -256,20 +233,12 @@ realmode_flags: .quad 0

.code16
bogus_real_magic:
- movb $0xba,%al ; outb %al,$0x80
jmp bogus_real_magic

.code64
bogus_64_magic:
- movb $0xb3,%al ; outb %al,$0x80
jmp bogus_64_magic

-.code16
-no_longmode:
- movb $0xbc,%al ; outb %al,$0x80
- jmp no_longmode
-
-#include "../verify_cpu.S"

/* This code uses an extended set of video mode numbers. These include:
* Aliases for standard modes
@@ -294,29 +263,9 @@ # Setting of user mode (AX=mode ID) => C
.code16
mode_seta:
movw %ax, %bx
-#if 0
- cmpb $0xff, %ah
- jz setalias
-
- testb $VIDEO_RECALC>>8, %ah
- jnz _setrec
-
- cmpb $VIDEO_FIRST_RESOLUTION>>8, %ah
- jnc setres
-
- cmpb $VIDEO_FIRST_SPECIAL>>8, %ah
- jz setspc
-
- cmpb $VIDEO_FIRST_V7>>8, %ah
- jz setv7
-#endif

cmpb $VIDEO_FIRST_VESA>>8, %ah
jnc check_vesaa
-#if 0
- orb %ah, %ah
- jz setmenu
-#endif

decb %ah
# jz setbios Add bios modes later

--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html