format pe64 dll efi at 0
entry main
section '.text' code executable readable
include '../struct.inc'
include '../macros.inc'
include '../const.inc'
include 'uefi.inc'
MEMORY_MAP_SIZE = 0x4000
GOP_BUFFER_SIZE = 0x800
KERNEL_BASE = 0x10000
RAMDISK_BASE = 0x100000
CODE_32_SELECTOR = 8
DATA_32_SELECTOR = 16
CODE_64_SELECTOR = 24
; linux/arch/x86/include/uapi/asm/e820.h
E820_RAM = 1
E820_RESERVED = 2
E820_ACPI = 3
E820_NVS = 4
E820_UNUSABLE = 5
E820_PMEM = 7
;E820_MAX = 128
main:
sub rsp, 0x38
; initialize UEFI library
InitializeLib
jc .error
; uefi_call_wrapper ConOut, Reset, ConOut, 1
; cmp rax, EFI_SUCCESS
; jnz .error
uefi_call_wrapper ConOut, ClearScreen, ConOut
cmp rax, EFI_SUCCESS
jnz .error
; uefi_call_wrapper ConOut, OutputString, ConOut, msg_hello
; cmp eax, EFI_SUCCESS
; jnz .error
uefi_call_wrapper BootServices, LocateHandle, 2, gopuuid, 0, gop_buffer_size, gop_buffer
cmp eax, EFI_SUCCESS
jnz .error
mov rsi, gop_buffer
lodsq
mov [gop_handle], rax
uefi_call_wrapper BootServices, HandleProtocol, qword [gop_handle], gopuuid, gop_interface
cmp eax, EFI_SUCCESS
jnz .error
mov rbx, [efi_ptr]
mov rdi, [rbx + EFI_SYSTEM_TABLE.ConfigurationTable]
mov rcx, [rbx + EFI_SYSTEM_TABLE.NumberOfTableEntries]
mov rax, 0x11d3e4f18868e871
mov rdx, 0x81883cc7800022bc
.next_table:
dec ecx
js .all_tables_done
cmp [rdi + 0], rax
jnz .not_acpi20
cmp [rdi + 8], rdx
jnz .not_acpi20
mov rax, [rdi + 16]
mov rdx, BOOT_LO.acpi_rsdp
mov [rdx], eax
;jmp $
jmp .all_tables_done
.not_acpi20:
add rdi, 24
jmp .next_table
.all_tables_done:
xor ebx, ebx
.next_mode:
call clearbuf
mov eax, ebx
lea rdi, [msg]
call num2dec
push rbx
uefi_call_wrapper [gop_interface], EFI_GRAPHICS_OUTPUT_PROTOCOL.QueryMode, [gop_interface], rbx, gop_info_size, gop_info
cmp rax, EFI_SUCCESS
jnz .error
mov rcx, [gop_info]
cmp [rcx + EFI_GRAPHICS_OUTPUT_MODE_INFORMATION.PixelFormat], 1 ; PixelBlueGreenRedReserved8BitPerColor
jnz .skip
mov eax, [rcx + EFI_GRAPHICS_OUTPUT_MODE_INFORMATION.HorizontalResolution]
lea rdi, [msg+4*2]
call num2dec
mov eax, [rcx + EFI_GRAPHICS_OUTPUT_MODE_INFORMATION.VerticalResolution]
lea rdi, [msg+9*2]
call num2dec
; mov eax, [rcx + EFI_GRAPHICS_OUTPUT_MODE_INFORMATION.PixelsPerScanLine]
; lea rdi, [msg+14*2]
; call num2dec
.skip:
uefi_call_wrapper ConOut, OutputString, ConOut, msg
cmp rax, EFI_SUCCESS
jnz .error
pop rbx
inc rbx
mov rcx, [gop_interface]
mov rdx, [rcx + EFI_GRAPHICS_OUTPUT_PROTOCOL.Mode]
cmp ebx, [rdx + EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE.MaxMode]
jnz .next_mode
uefi_call_wrapper ConIn, Reset, ConIn, 1
cmp rax, EFI_SUCCESS
jnz .error
xor ecx, ecx
@@:
push rcx
uefi_call_wrapper ConIn, ReadKeyStroke, ConIn, msg
pop rcx
mov rdx, EFI_DEVICE_ERROR
cmp rax, rdx
jz .error
mov rdx, EFI_NOT_READY
cmp rax, rdx
jz @b
; cmp rax, EFI_SUCCESS
movzx eax, word[msg+2]
;jmp .key_done
cmp al, 0x0D
jz .key_done
imul ecx, 10
sub eax, '0'
add ecx, eax
jmp @b
.key_done:
uefi_call_wrapper [gop_interface], EFI_GRAPHICS_OUTPUT_PROTOCOL.SetMode, [gop_interface], rcx
cmp eax, EFI_SUCCESS
jnz .error
mov rcx, [gop_interface]
mov rdx, [rcx + EFI_GRAPHICS_OUTPUT_PROTOCOL.Mode]
mov rdi, [rdx + EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE.FrameBufferBase]
mov [fb_base], rdi
mov ebx, [rdx + EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE.Mode]
uefi_call_wrapper [gop_interface], EFI_GRAPHICS_OUTPUT_PROTOCOL.QueryMode, [gop_interface], rbx, gop_info_size, gop_info
cmp rax, EFI_SUCCESS
jnz .error
mov rcx, [gop_info]
mov eax, [rcx + EFI_GRAPHICS_OUTPUT_MODE_INFORMATION.HorizontalResolution]
xor rdx, rdx
mov word [rdx + BOOT_LO.x_res], ax
mov eax, [rcx + EFI_GRAPHICS_OUTPUT_MODE_INFORMATION.VerticalResolution]
mov word [rdx + BOOT_LO.y_res], ax
mov eax, [rcx + EFI_GRAPHICS_OUTPUT_MODE_INFORMATION.PixelsPerScanLine]
shl eax, 2
mov word [rdx + BOOT_LO.pitch], ax
mov byte [rdx + BOOT_LO.pci_data + 0], 1 ; PCI access mechanism
mov byte [rdx + BOOT_LO.pci_data + 1], 8 ; last bus, don't know how to count them
mov byte [rdx + BOOT_LO.pci_data + 2], 0x10 ; PCI version
mov byte [rdx + BOOT_LO.pci_data + 3], 0x02
mov dword [rdx + BOOT_LO.pci_data + 4], 0xe3
uefi_call_wrapper BootServices, GetMemoryMap, memory_map_size, memory_map, memory_map_key, descriptor_size, descriptor_ver
cmp eax, EFI_SUCCESS
jnz .error
mov rdi, BOOT_LO.memmap_block_cnt
mov dword[rdi], 0
mov rdi, BOOT_LO.memmap_blocks
mov rax, [memory_map_size]
xor edx, edx
mov rcx, [descriptor_size]
div ecx
mov ecx, eax
mov rsi, memory_map
.next_descr:
call add_uefi_memmap
add rsi, [descriptor_size]
add rdi, sizeof.e820entry
dec rcx
cmp rcx, 0
jnz .next_descr
mov [memory_map_size], MEMORY_MAP_SIZE
uefi_call_wrapper BootServices, GetMemoryMap, memory_map_size, memory_map, memory_map_key, descriptor_size, descriptor_ver
cmp eax, EFI_SUCCESS
jnz .error
uefi_call_wrapper BootServices, ExitBootServices, [efi_handler], [memory_map_key]
cmp eax, EFI_SUCCESS
jnz .error
cli
mov rsi, kernel_data_begin
mov rdi, KERNEL_BASE
mov rcx, (kernel_data_end - kernel_data_begin + 7) / 8
rep movsq
mov rsi, ramdisk_data_begin
mov rdi, RAMDISK_BASE
mov rcx, (ramdisk_data_end - ramdisk_data_begin + 7 ) / 8
rep movsq
xor esi, esi
mov byte[esi + BOOT_LO.bpp], 32
mov word[esi + BOOT_LO.vesa_mode], 0
mov dword[esi + BOOT_LO.bank_switch], 0
mov rdi, [fb_base]
mov dword[esi + BOOT_LO.lfb], edi
mov byte[esi + BOOT_LO.mtrr], 1
mov byte[esi + BOOT_LO.launcher_start], 1
mov byte[esi + BOOT_LO.debug_print], 1
mov byte[esi + BOOT_LO.dma], 0
; mov qword[esi + BOOT_LO.pci_data], 0
mov dword[esi + BOOT_LO.apm_entry], 0
mov word[esi + BOOT_LO.apm_version], 0
mov dword[esi + BOOT_LO.apm_flags], 0
mov word[esi + BOOT_LO.apm_code_32], 0
mov word[esi + BOOT_LO.apm_code_16], 0
mov word[esi + BOOT_LO.apm_data_16], 0
mov byte[esi + BOOT_LO.bios_hd_cnt], 0
mov rsi, syspath
mov rdi, BOOT_LO.syspath
mov ecx, 32
rep movsb
lgdt [cs:GDTR]
mov ax, DATA_32_SELECTOR
mov ds, ax
mov es, ax
mov fs, ax
mov gs, ax
mov ss, ax
push CODE_32_SELECTOR
lea rax, [.next]
push rax
; push .next
retf
use32
align 16
.next:
mov eax, cr0
and eax, not CR0_PG
mov cr0, eax
mov ecx, MSR_AMD_EFER
rdmsr
btr eax, 8 ; LME
wrmsr
mov eax, cr4
and eax, not CR4_PAE
mov cr4, eax
push KERNEL_BASE
retn
use64
.error:
uefi_call_wrapper ConOut, OutputString, ConOut, msg_error
jmp .quit
.quit:
mov rcx, -1
loop $
; linux/arch/x86/platform/efi/efi.c
; do_add_efi_memmap
add_uefi_memmap:
push rax rbx rcx rdx rsi rdi
mov r10d, [rsi + 0]
mov r11, [rsi + 8]
; mov r12, [rsi + 16]
mov r13, [rsi + 24]
mov r14, [rsi + 32]
mov [rdi + e820entry.addr], r11
mov rax, r13
shl rax, 12
mov [rdi + e820entry.size], rax
cmp r10d, EFI_LOADER_CODE
jz .case0
cmp r10d, EFI_LOADER_DATA
jz .case0
cmp r10d, EFI_BOOT_SERVICES_CODE
jz .case0
cmp r10d, EFI_BOOT_SERVICES_DATA
jz .case0
cmp r10d, EFI_CONVENTIONAL_MEMORY
jz .case0
cmp r10d, EFI_ACPI_RECLAIM_MEMORY
jz .case1
cmp r10d, EFI_ACPI_MEMORY_NVS
jz .case2
cmp r10d, EFI_UNUSABLE_MEMORY
jz .case3
cmp r10d, EFI_PERSISTENT_MEMORY
jz .case4
jmp .default
.case0:
test r14, EFI_MEMORY_WB
jz @f
mov eax, E820_RAM
jmp .done
@@:
mov eax, E820_RESERVED
jmp .done
.case1:
mov eax, E820_ACPI
jmp .done
.case2:
mov eax, E820_NVS
jmp .done
.case3:
mov eax, E820_UNUSABLE
jmp .done
.case4:
mov eax, E820_PMEM
jmp .done
.default:
mov eax, E820_RESERVED
jmp .done
.done:
mov [rdi + e820entry.type], eax
mov rax, BOOT_LO.memmap_block_cnt
inc word[rax]
pop rdi rsi rdx rcx rbx rax
ret
num2dec:
push rax rbx rcx rdx rsi rdi
xor ecx, ecx
mov ebx, 10
.next_digit:
xor edx, edx
div ebx
push rdx
inc ecx
test eax, eax
jnz .next_digit
.next_char:
pop rax
add eax, '0'
stosw
loop .next_char
pop rdi rsi rdx rcx rbx rax
ret
num2hex:
push rax rbx rcx rdx rsi rdi
xchg rdx, rax
mov ecx, 16
.next_tetra:
rol rdx, 4
movzx eax, dl
and eax, 0x0f
movzx eax, byte[hex+eax]
stosw
loop .next_tetra
pop rdi rsi rdx rcx rbx rax
ret
hex db '0123456789ABCDEF'
clearbuf:
push rax rbx rcx rdx rsi rdi
mov eax, 0x0020
mov ecx, 79
mov rdi, msg
rep stosw
pop rdi rsi rdx rcx rbx rax
ret
section '.data' data readable writeable
GDTR:
dw 4*8-1
dq GDT
GDT:
dw 0, 0, 0, 0
dw 0FFFFh,0,9A00h,0CFh ; 32-bit code
dw 0FFFFh,0,9200h,0CFh ; flat data
dw 0FFFFh,0,9A00h,0AFh ; 64-bit code
fb_base dq 0
gopuuid db EFI_GRAPHICS_OUTPUT_PROTOCOL_UUID
gop_buffer_size dq GOP_BUFFER_SIZE
gop_handle dq 0
gop_interface dq 0
gop_info_size dq 0
gop_info dq 0
memory_map_key dq 0
descriptor_size dq 0
descriptor_ver dq 0
memory_map_size dq MEMORY_MAP_SIZE
msg_success du 'Success!',13,10,0
msg_error du 'Error!',13,10,0
msg du 79 dup ' ',13,10,0
syspath db '/RD/1',0
memory_map rb MEMORY_MAP_SIZE
gop_buffer rb GOP_BUFFER_SIZE
kernel_data_begin:
file '../kernel.bin.ext_loader'
kernel_data_end:
ramdisk_data_begin:
file '../../../data/kolibri.img'
ramdisk_data_end:
align 16
data fixups
end data