37,7 → 37,7 |
#include <arch/cpuid.h> |
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#define START_STACK (BOOT_OFFSET - BOOT_STACK_SIZE) |
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.section K_TEXT_START, "ax" |
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.code32 |
46,7 → 46,7 |
multiboot_header: |
.long MULTIBOOT_HEADER_MAGIC |
.long MULTIBOOT_HEADER_FLAGS |
.long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS) # checksum |
.long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS) # checksum |
.long multiboot_header |
.long unmapped_ktext_start |
.long 0 |
55,15 → 55,19 |
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multiboot_image_start: |
cld |
movl $START_STACK, %esp # initialize stack pointer |
lgdtl bootstrap_gdtr # initialize Global Descriptor Table register |
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movl $START_STACK, %esp # initialize stack pointer |
lgdtl bootstrap_gdtr # initialize Global Descriptor Table register |
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movw $gdtselector(KDATA_DES), %cx |
movw %cx, %es |
movw %cx, %ds # kernel data + stack |
movw %cx, %ds # kernel data + stack |
movw %cx, %ss |
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# |
# Simics seems to remove hidden part of GS on entering user mode |
# when _visible_ part of GS does not point to user-mode segment |
# when _visible_ part of GS does not point to user-mode segment. |
# |
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movw $gdtselector(UDATA_DES), %cx |
movw %cx, %fs |
movw %cx, %gs |
71,17 → 75,19 |
jmpl $gdtselector(KTEXT32_DES), $multiboot_meeting_point |
multiboot_meeting_point: |
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movl %eax, grub_eax # save parameters from GRUB |
movl %eax, grub_eax # save parameters from GRUB |
movl %ebx, grub_ebx |
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# |
# Protected 32-bit. We want to reuse the code-seg descriptor, |
# the Default operand size must not be 1 when entering long mode |
# the Default operand size must not be 1 when entering long mode. |
# |
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movl $(INTEL_CPUID_EXTENDED), %eax |
cpuid |
cmp $(INTEL_CPUID_EXTENDED), %eax |
movl $(INTEL_CPUID_EXTENDED), %eax |
cpuid |
cmp $(INTEL_CPUID_EXTENDED), %eax |
ja extended_cpuid_supported |
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movl $extended_cpuid_msg, %esi |
jmp error_halt |
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90,11 → 96,11 |
movl $(AMD_CPUID_EXTENDED), %eax |
cpuid |
bt $(AMD_EXT_LONG_MODE), %edx |
jc long_mode_supported |
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jc long_mode_supported |
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movl $long_mode_msg, %esi |
jmp error_halt |
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long_mode_supported: |
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bt $(AMD_EXT_NOEXECUTE), %edx |
108,7 → 114,7 |
movl $(INTEL_CPUID_STANDARD), %eax |
cpuid |
bt $(INTEL_FXSAVE), %edx |
jc fx_supported |
jc fx_supported |
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movl $fx_msg, %esi |
jmp error_halt |
116,59 → 122,43 |
fx_supported: |
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bt $(INTEL_SSE2), %edx |
jc sse2_supported |
jc sse2_supported |
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movl $sse2_msg, %esi |
jmp error_halt |
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sse2_supported: |
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#ifdef CONFIG_FB |
mov $vesa_init, %esi |
mov $VESA_INIT_SEGMENT << 4, %edi |
mov $e_vesa_init - vesa_init, %ecx |
rep movsb |
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mov $VESA_INIT_SEGMENT << 4, %edi |
jmpl *%edi |
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vesa_meeting_point: |
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mov %esi, KA2PA(vesa_ph_addr) |
mov %di, KA2PA(vesa_height) |
shr $16, %edi |
mov %di, KA2PA(vesa_width) |
mov %bx, KA2PA(vesa_scanline) |
shr $16, %ebx |
mov %bx, KA2PA(vesa_bpp) |
#endif |
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#include "vesa_prot.inc" |
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# |
# Enable 64-bit page translation entries - CR4.PAE = 1. |
# Paging is not enabled until after long mode is enabled |
# Paging is not enabled until after long mode is enabled. |
# |
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movl %cr4, %eax |
btsl $5, %eax |
movl %eax, %cr4 |
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# Set up paging tables |
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# set up paging tables |
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leal ptl_0, %eax |
movl %eax, %cr3 |
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# Enable long mode |
# enable long mode |
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movl $EFER_MSR_NUM, %ecx # EFER MSR number |
rdmsr # Read EFER |
btsl $AMD_LME_FLAG, %eax # Set LME = 1 |
wrmsr # Write EFER |
movl $EFER_MSR_NUM, %ecx # EFER MSR number |
rdmsr # read EFER |
btsl $AMD_LME_FLAG, %eax # set LME = 1 |
wrmsr # write EFER |
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# Enable paging to activate long mode (set CR0.PG = 1) |
# enable paging to activate long mode (set CR0.PG = 1) |
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movl %cr0, %eax |
btsl $31, %eax |
movl %eax, %cr0 |
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# At this point we are in compatibility mode |
# at this point we are in compatibility mode |
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jmpl $gdtselector(KTEXT_DES), $start64 |
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175,262 → 165,29 |
.code64 |
start64: |
movq $(PA2KA(START_STACK)), %rsp |
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# arch_pre_main(grub_eax, grub_ebx) |
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# call arch_pre_main(grub_eax, grub_ebx) |
xorq %rdi, %rdi |
movl grub_eax, %edi |
xorq %rsi, %rsi |
movl grub_ebx, %esi |
call arch_pre_main |
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call main_bsp |
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# Not reached. |
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cli |
hlt |
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#ifdef CONFIG_FB |
.code32 |
vesa_init: |
jmp $gdtselector(VESA_INIT_DES), $vesa_init_real - vesa_init |
call main_bsp |
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.code16 |
vesa_init_real: |
# not reached |
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mov %cr0, %eax |
and $~1, %eax |
mov %eax, %cr0 |
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jmp $VESA_INIT_SEGMENT, $vesa_init_real2 - vesa_init |
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vesa_init_real2: |
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mov $VESA_INIT_SEGMENT, %bx |
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mov %bx, %es |
mov %bx, %fs |
mov %bx, %gs |
mov %bx, %ds |
mov %bx, %ss |
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movl $0x0000fffc, %esp |
movl $0x0000fffc, %ebp |
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#define VESA_INFO_SIZE 1024 |
cli |
hlt0: |
hlt |
jmp hlt0 |
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#define VESA_MODE_ATTRIBUTES_OFFSET 0 |
#define VESA_MODE_LIST_PTR_OFFSET 14 |
#define VESA_MODE_SCANLINE_OFFSET 16 |
#define VESA_MODE_WIDTH_OFFSET 18 |
#define VESA_MODE_HEIGHT_OFFSET 20 |
#define VESA_MODE_BPP_OFFSET 25 |
#define VESA_MODE_PHADDR_OFFSET 40 |
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#define VESA_END_OF_MODES 0xffff |
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#define VESA_OK 0x4f |
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#define VESA_GET_INFO 0x4f00 |
#define VESA_GET_MODE_INFO 0x4f01 |
#define VESA_SET_MODE 0x4f02 |
#define VESA_SET_PALETTE 0x4f09 |
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#define CONFIG_VESA_BPP_a 255 |
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#if CONFIG_VESA_BPP == 24 |
#define CONFIG_VESA_BPP_VARIANT 32 |
#endif |
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mov $VESA_GET_INFO, %ax |
mov $e_vesa_init - vesa_init, %di |
push %di |
int $0x10 |
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pop %di |
cmp $VESA_OK, %al |
jnz 0f |
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mov 2 + VESA_MODE_LIST_PTR_OFFSET(%di), %si |
mov %si, %gs |
mov VESA_MODE_LIST_PTR_OFFSET(%di), %si |
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add $VESA_INFO_SIZE, %di |
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1:# Try next mode |
mov %gs:(%si), %cx |
cmp $VESA_END_OF_MODES, %cx |
jz 0f |
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inc %si |
inc %si |
push %cx |
push %di |
push %si |
mov $VESA_GET_MODE_INFO, %ax |
int $0x10 |
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pop %si |
pop %di |
pop %cx |
cmp $VESA_OK, %al |
jnz 0f |
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mov $CONFIG_VESA_WIDTH, %ax |
cmp VESA_MODE_WIDTH_OFFSET(%di), %ax |
jnz 1b |
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mov $CONFIG_VESA_HEIGHT, %ax |
cmp VESA_MODE_HEIGHT_OFFSET(%di), %ax |
jnz 1b |
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mov $CONFIG_VESA_BPP, %al |
cmp VESA_MODE_BPP_OFFSET(%di), %al |
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#ifdef CONFIG_VESA_BPP_VARIANT |
jz 2f |
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mov $CONFIG_VESA_BPP_VARIANT, %al |
cmp VESA_MODE_BPP_OFFSET(%di), %al |
#endif |
jnz 1b |
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2: |
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mov %cx, %bx |
or $0xc000, %bx |
push %di |
mov $VESA_SET_MODE, %ax |
int $0x10 |
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pop %di |
cmp $VESA_OK, %al |
jnz 0f |
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#if CONFIG_VESA_BPP == 8 |
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# Set 3:2:3 VGA palette |
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mov VESA_MODE_ATTRIBUTES_OFFSET(%di), %ax |
push %di |
mov $vga323 - vesa_init, %di |
mov $0x100, %ecx |
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bt $5, %ax # Test if VGA compatible registers are present |
jnc vga_compat |
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# Try VESA routine to set palette |
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mov $VESA_SET_PALETTE, %ax |
xor %bl, %bl |
xor %dx, %dx |
int $0x10 |
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cmp $0x00, %ah |
je vga_not_compat |
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vga_compat: |
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# Try VGA registers to set palette |
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movw $0x3c6, %dx # Set palette mask |
movb $0xff, %al |
outb %al, %dx |
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movw $0x3c8, %dx # First index to set |
xor %al, %al |
outb %al, %dx |
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movw $0x3c9, %dx # Data port |
vga_loop: |
movb %es:2(%di), %al |
outb %al, %dx |
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movb %es:1(%di), %al |
outb %al, %dx |
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movb %es:(%di), %al |
outb %al, %dx |
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addw $4, %di |
loop vga_loop |
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vga_not_compat: |
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pop %di |
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#endif |
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mov VESA_MODE_PHADDR_OFFSET(%di), %esi |
mov VESA_MODE_WIDTH_OFFSET(%di), %ax |
shl $16, %eax |
mov VESA_MODE_HEIGHT_OFFSET(%di), %ax |
mov VESA_MODE_BPP_OFFSET(%di), %bl |
xor %bh, %bh |
shl $16, %ebx |
mov VESA_MODE_SCANLINE_OFFSET(%di), %bx |
mov %eax, %edi |
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8: |
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mov %cr0, %eax |
or $1, %eax |
mov %eax, %cr0 |
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jmp 9f |
9: |
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ljmpl $gdtselector(KTEXT32_DES), $(vesa_init_protect - vesa_init + VESA_INIT_SEGMENT << 4) |
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0:# No prefered mode found |
mov $0x111, %cx |
push %di |
push %cx |
mov $VESA_GET_MODE_INFO, %ax |
int $0x10 |
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pop %cx |
pop %di |
cmp $VESA_OK, %al |
jnz 1f |
jz 2b # Force relative jump |
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1: |
mov $0x0003, %ax |
int $0x10 |
mov $0xffffffff, %edi # EGA text mode used, because of problems with VESA |
xor %ax, %ax |
jz 8b # Force relative jump |
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vga323: |
#include "vga323.pal" |
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.code32 |
vesa_init_protect: |
movw $gdtselector(KDATA_DES), %cx |
movw %cx, %es |
movw %cx, %ds # kernel data + stack |
movw %cx, %ss |
# Simics seems to remove hidden part of GS on entering user mode |
# when _visible_ part of GS does not point to user-mode segment |
movw $gdtselector(UDATA_DES), %cx |
movw %cx, %fs |
movw %cx, %gs |
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movl $START_STACK, %esp # initialize stack pointer |
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jmpl $gdtselector(KTEXT32_DES), $vesa_meeting_point |
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.align 4 |
e_vesa_init: |
#endif |
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# Print string from %esi to EGA display (in red) and halt |
error_halt: |
movl $0xb8000, %edi # base of EGA text mode memory |
movl $0xb8000, %edi # base of EGA text mode memory |
xorl %eax, %eax |
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movw $0x3d4, %dx # read bits 8 - 15 of the cursor address |
movw $0x3d4, %dx # read bits 8 - 15 of the cursor address |
movb $0xe, %al |
outb %al, %dx |
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438,7 → 195,7 |
inb %dx, %al |
shl $8, %ax |
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movw $0x3d4, %dx # read bits 0 - 7 of the cursor address |
movw $0x3d4, %dx # read bits 0 - 7 of the cursor address |
movb $0xf, %al |
outb %al, %dx |
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447,7 → 204,9 |
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cmp $1920, %ax |
jbe cursor_ok |
movw $1920, %ax # sanity check for the cursor on the last line |
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movw $1920, %ax # sanity check for the cursor on the last line |
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cursor_ok: |
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movw %ax, %bx |
454,7 → 213,7 |
shl $1, %eax |
addl %eax, %edi |
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movw $0x0c00, %ax # black background, light red foreground |
movw $0x0c00, %ax # black background, light red foreground |
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ploop: |
lodsb |
461,11 → 220,11 |
cmp $0, %al |
je ploop_end |
stosw |
inc %bx |
inc %bx |
jmp ploop |
ploop_end: |
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movw $0x3d4, %dx # write bits 8 - 15 of the cursor address |
movw $0x3d4, %dx # write bits 8 - 15 of the cursor address |
movb $0xe, %al |
outb %al, %dx |
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473,7 → 232,7 |
movb %bh, %al |
outb %al, %dx |
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movw $0x3d4, %dx # write bits 0 - 7 of the cursor address |
movw $0x3d4, %dx # write bits 0 - 7 of the cursor address |
movb $0xf, %al |
outb %al, %dx |
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480,17 → 239,20 |
movw $0x3d5, %dx |
movb %bl, %al |
outb %al, %dx |
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cli |
hlt |
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hlt1: |
hlt |
jmp hlt1 |
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#include "vesa_real.inc" |
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.section K_INI_PTLS, "aw", @progbits |
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# |
# Macro for generating initial page table contents. |
# @param cnt Number of entries to generat. Must be multiple of 8. |
# @param g Number of GB that will be added to the mapping. |
# @param cnt Number of entries to generat. Must be multiple of 8. |
# @param g Number of GB that will be added to the mapping. |
# |
.macro ptl2gen cnt g |
.if \cnt |
542,7 → 304,7 |
# Mapping of [0; 1G) at -2G |
.quad ptl_2_0g + (PTL_WRITABLE | PTL_PRESENT) |
.fill 1, 8, 0 |
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.align 4096 |
.global ptl_0 |
ptl_0: |