add set_text_color, add constants for colors

kernel/boot/bootx64.asm

@@ -19,6 +19,15 @@ include '../const.inc'
 purge DQ ; because of some struct DQ in const.inc
 include 'uefi64.inc'
 
+; rbx - efi table
+; rcx - color = fore | back
+proc set_text_color; uses rax
+        mov     rax, rcx
+        mov     rcx, [rbx+EFI_SYSTEM_TABLE.ConOut]
+        fstcall [rcx+EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.SetAttribute], rcx, rax
+        ret
+endp
+
 proc main _efi_handle, _efi_table
         mov     [efi_handle], rcx
         mov     [efi_table], rdx
@@ -28,8 +37,16 @@ proc main _efi_handle, _efi_table
         fstcall [rcx+EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.Reset], rcx, 1
         test    eax, eax
         jnz     $       ; what can I do here?
+
+        fstcall set_text_color, EFI_BLUE or EFI_BACKGROUND_GREEN
+
         mov     rcx, [rbx+EFI_SYSTEM_TABLE.ConOut]
-        fstcall [rcx+EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.OutputString], rcx, msg_hello_k64_loader
+        fstcall [rcx+EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.OutputString], rcx, msg_hello_k64_loader ; todo functions for write text like set_text_color
+
+        fstcall set_text_color, EFI_LIGHTRED
+
+        mov     rcx, [rbx+EFI_SYSTEM_TABLE.ConOut]
+        fstcall [rcx+EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.OutputString], rcx, msg_2
 
         jmp     $
 endp
@@ -42,6 +59,7 @@ efi_table   dq 0
 
 section '.rodata' data readable
 msg_hello_k64_loader du "Hello from Kolibri64 efi loader",13,10,0
+msg_2 du "Lorem ipsum !",13,10,0
 
 
 section '.reloc' fixups data discardable

kernel/boot/uefi.inc

@@ -107,6 +107,35 @@ EFI_FILE_MODE_READ   = 1
 EFI_FILE_MODE_WRITE  = 2
 EFI_FILE_MODE_CREATE = 0x8000000000000000
 
+; foreground colors
+EFI_BLACK                            = 0x00
+EFI_BLUE                             = 0x01
+EFI_GREEN                            = 0x02
+EFI_CYAN                             = 0x03
+EFI_RED                              = 0x04
+EFI_MAGENTA                          = 0x05
+EFI_BROWN                            = 0x06
+EFI_LIGHTGRAY                        = 0x07
+EFI_BRIGHT                           = 0x08
+EFI_DARKGRAY                         = 0x08
+EFI_LIGHTBLUE                        = 0x09
+EFI_LIGHTGREEN                       = 0x0A
+EFI_LIGHTCYAN                        = 0x0B
+EFI_LIGHTRED                         = 0x0C
+EFI_LIGHTMAGENTA                     = 0x0D
+EFI_YELLOW                           = 0x0E
+EFI_WHITE                            = 0x0F
+
+; background colors
+EFI_BACKGROUND_BLACK                 = 0x00
+EFI_BACKGROUND_BLUE                  = 0x10
+EFI_BACKGROUND_GREEN                 = 0x20
+EFI_BACKGROUND_CYAN                  = 0x30
+EFI_BACKGROUND_RED                   = 0x40
+EFI_BACKGROUND_MAGENTA               = 0x50
+EFI_BACKGROUND_BROWN                 = 0x60
+EFI_BACKGROUND_LIGHTGRAY             = 0x70
+
 struct EFI_MEMORY_DESCRIPTOR
   Type          dd ?
                 dd ?    ; align