amd64/bareMetalOS-0.5.2/pure64.boot0/src/sysvar.asm

   1 ; =============================================================================
   2 ; Pure64 -- a 64-bit OS loader written in Assembly for x86-64 systems
   3 ; Copyright (C) 2008-2011 Return Infinity -- see LICENSE.TXT
   4 ;
   5 ; System Variables
   6 ; =============================================================================
   7
   8
   9 ;CONFIG
  10 cfg_smpinit:            db 1    ; By default SMP is enabled. Set to 0 to disable.
  11 cfg_vesa:               db 0    ; By default VESA is disabled. Set to 1 to enable.
  12 cfg_default:            db 0    ; By default we don't need a config file so set to 0. If a config file is found set to 1.
  13 cfg_e820:               db 1    ; By default E820 should be present. Pure64 will set this to 0 if not found/usable.
  14 cfg_mbr:                db 0    ; Did we boot off of a disk with a proper MBR
  15
  16 ; Memory locations
  17 E820Map:                equ 0x0000000000004000
  18 InfoMap:                equ 0x0000000000005000
  19 SystemVariables:        equ 0x0000000000005A00
  20 VBEModeInfoBlock        equ 0x0000000000005C00
  21 hdbuffer:               equ 0x0000000000070000  ; 32768 bytes = 0x6000 -> 0xDFFF VERIFY THIS!!!
  22 hdbuffer1:              equ 0x000000000007E000  ; 512 bytes = 0xE000 -> 0xE1FF VERIFY THIS!!!
  23
  24 ; DQ - Starting at offset 0, increments by 0x8
  25 os_LocalAPICAddress:    equ SystemVariables + 0x00
  26 os_IOAPICAddress:       equ SystemVariables + 0x08
  27 os_ACPITableAddress:    equ SystemVariables + 0x10
  28 screen_cursor_offset:   equ SystemVariables + 0x18
  29 hd1_maxlba:             equ SystemVariables + 0x20
  30 os_Counter:             equ SystemVariables + 0x28
  31
  32 ; DD - Starting at offset 128, increments by 4
  33 hd1_size:               equ SystemVariables + 128
  34 fat16_FatStart:         equ SystemVariables + 132
  35 fat16_TotalSectors:     equ SystemVariables + 136
  36 fat16_DataStart:        equ SystemVariables + 140
  37 fat16_RootStart:        equ SystemVariables + 144
  38 fat16_PartitionOffset:  equ SystemVariables + 148
  39
  40 ; DW - Starting at offset 256, increments by 2
  41 cpu_speed:              equ SystemVariables + 256
  42 cpu_activated:          equ SystemVariables + 258
  43 cpu_detected:           equ SystemVariables + 260
  44 mem_amount:             equ SystemVariables + 262
  45 fat16_BytesPerSector:   equ SystemVariables + 264
  46 fat16_ReservedSectors:  equ SystemVariables + 266
  47 fat16_SectorsPerFat:    equ SystemVariables + 268
  48 fat16_RootDirEnts:      equ SystemVariables + 270
  49
  50 ; DB - Starting at offset 384, increments by 1
  51 hd1_enable:             equ SystemVariables + 384
  52 hd1_lba48:              equ SystemVariables + 385
  53 screen_cursor_x:        equ SystemVariables + 386
  54 screen_cursor_y:        equ SystemVariables + 387
  55 fat16_SectorsPerCluster:        equ SystemVariables + 388
  56 fat16_Fats:             equ SystemVariables + 389
  57 memtempstring:          equ SystemVariables + 390
  58 speedtempstring:        equ SystemVariables + 400
  59 cpu_amount_string:      equ SystemVariables + 410
  60 hdtempstring:           equ SystemVariables + 420
  61
  62 ;MISC
  63 screen_cols:            db 80
  64 screen_rows:            db 25
  65 hextable:               db '0123456789ABCDEF'
  66
  67 ;STRINGS
  68 kernelerror:            db 'FATAL ERROR: Software not found.', 0
  69 kernelname:             db 'KERNEL64SYS', 0
  70 configname:             db 'PURE64  CFG', 0
  71 msg_done:               db ' Done', 0
  72 msg_CPU:                db '[CPU: ', 0
  73 msg_MEM:                db ']  [MEM: ', 0
  74 msg_HDD:                db '  [HDD: ', 0
  75 msg_mb:                 db ' MiB]', 0
  76 msg_mhz:                db 'MHz x', 0
  77 msg_loadingkernel:      db 'Loading software...', 0
  78 msg_startingkernel:     db 'Starting software.', 0
  79 msg_noconfig:           db '(default config)', 0
  80 no64msg:                db 'FATAL ERROR: CPU does not support 64-bit mode. Please run on supported hardware.', 0
  81 initStartupMsg:         db 'Pure64 v0.4.9 - http://www.returninfinity.com', 13, 10, 13, 10, 'Initializing system...', 0
  82 msg_date:               db '2011/04/05', 0
  83
  84
  85 ; Mandatory information for all VBE revisions
  86 VBEModeInfoBlock.ModeAttributes         equ VBEModeInfoBlock + 0        ; DW - mode attributes
  87 VBEModeInfoBlock.WinAAttributes         equ VBEModeInfoBlock + 2        ; DB - window A attributes
  88 VBEModeInfoBlock.WinBAttributes         equ VBEModeInfoBlock + 3        ; DB - window B attributes
  89 VBEModeInfoBlock.WinGranularity         equ VBEModeInfoBlock + 4        ; DW - window granularity in KB
  90 VBEModeInfoBlock.WinSize                equ VBEModeInfoBlock + 6        ; DW - window size in KB
  91 VBEModeInfoBlock.WinASegment            equ VBEModeInfoBlock + 8        ; DW - window A start segment
  92 VBEModeInfoBlock.WinBSegment            equ VBEModeInfoBlock + 10       ; DW - window B start segment
  93 VBEModeInfoBlock.WinFuncPtr             equ VBEModeInfoBlock + 12       ; DD - real mode pointer to window function
  94 VBEModeInfoBlock.BytesPerScanLine       equ VBEModeInfoBlock + 16       ; DW - bytes per scan line
  95 ; Mandatory information for VBE 1.2 and above
  96 VBEModeInfoBlock.XResolution            equ VBEModeInfoBlock + 18       ; DW - horizontal resolution in pixels or characters
  97 VBEModeInfoBlock.YResolution            equ VBEModeInfoBlock + 20       ; DW - vertical resolution in pixels or characters
  98 VBEModeInfoBlock.XCharSize              equ VBEModeInfoBlock + 22       ; DB - character cell width in pixels
  99 VBEModeInfoBlock.YCharSize              equ VBEModeInfoBlock + 23       ; DB - character cell height in pixels
 100 VBEModeInfoBlock.NumberOfPlanes         equ VBEModeInfoBlock + 24       ; DB - number of memory planes
 101 VBEModeInfoBlock.BitsPerPixel           equ VBEModeInfoBlock + 25       ; DB - bits per pixel
 102 VBEModeInfoBlock.NumberOfBanks          equ VBEModeInfoBlock + 26       ; DB - number of banks
 103 VBEModeInfoBlock.MemoryModel            equ VBEModeInfoBlock + 27       ; DB - memory model type
 104 VBEModeInfoBlock.BankSize               equ VBEModeInfoBlock + 28       ; DB - bank size in KB
 105 VBEModeInfoBlock.NumberOfImagePages     equ VBEModeInfoBlock + 29       ; DB - number of image pages
 106 VBEModeInfoBlock.Reserved               equ VBEModeInfoBlock + 30       ; DB - reserved (0x00 for VBE 1.0-2.0, 0x01 for VBE 3.0)
 107 ; Direct Color fields (required for direct/6 and YUV/7 memory models)
 108 VBEModeInfoBlock.RedMaskSize            equ VBEModeInfoBlock + 31       ; DB - size of direct color red mask in bits
 109 VBEModeInfoBlock.RedFieldPosition       equ VBEModeInfoBlock + 32       ; DB - bit position of lsb of red mask
 110 VBEModeInfoBlock.GreenMaskSize          equ VBEModeInfoBlock + 33       ; DB - size of direct color green mask in bits
 111 VBEModeInfoBlock.GreenFieldPosition     equ VBEModeInfoBlock + 34       ; DB - bit position of lsb of green mask
 112 VBEModeInfoBlock.BlueMaskSize           equ VBEModeInfoBlock + 35       ; DB - size of direct color blue mask in bits
 113 VBEModeInfoBlock.BlueFieldPosition      equ VBEModeInfoBlock + 36       ; DB - bit position of lsb of blue mask
 114 VBEModeInfoBlock.RsvdMaskSize           equ VBEModeInfoBlock + 37       ; DB - size of direct color reserved mask in bits
 115 VBEModeInfoBlock.RsvdFieldPosition      equ VBEModeInfoBlock + 38       ; DB - bit position of lsb of reserved mask
 116 VBEModeInfoBlock.DirectColorModeInfo    equ VBEModeInfoBlock + 39       ; DB - direct color mode attributes
 117 ; Mandatory information for VBE 2.0 and above
 118 VBEModeInfoBlock.PhysBasePtr            equ VBEModeInfoBlock + 40       ; DD - physical address for flat memory frame buffer
 119 VBEModeInfoBlock.Reserved1              equ VBEModeInfoBlock + 44       ; DD - Reserved - always set to 0
 120 VBEModeInfoBlock.Reserved2              equ VBEModeInfoBlock + 48       ; DD - Reserved - always set to 0
 121 ; Mandatory information for VBE 3.0 and above
 122 ;VBEModeInfoBlock.LinBytesPerScanLine   dw 0    ; bytes per scan line for linear modes
 123 ;VBEModeInfoBlock.BnkNumberOfImagePages db 0    ; number of images for banked modes
 124 ;VBEModeInfoBlock.LinNumberOfImagePages db 0    ; number of images for linear modes
 125 ;VBEModeInfoBlock.LinRedMaskSize        db 0    ; size of direct color red mask (linear modes)
 126 ;VBEModeInfoBlock.LinRedFieldPosition   db 0    ; bit position of lsb of red mask (linear modes)
 127 ;VBEModeInfoBlock.LinGreenMaskSize      db 0    ; size of direct color green mask  (linear modes)
 128 ;VBEModeInfoBlock.LinGreenFieldPosition db 0    ; bit position of lsb of green mask (linear modes)
 129 ;VBEModeInfoBlock.LinBlueMaskSize       db 0    ; size of direct color blue mask  (linear modes)
 130 ;VBEModeInfoBlock.LinBlueFieldPosition  db 0    ; bit position of lsb of blue mask (linear modes)
 131 ;VBEModeInfoBlock.LinRsvdMaskSize       db 0    ; size of direct color reserved mask (linear modes)
 132 ;VBEModeInfoBlock.LinRsvdFieldPosition  db 0    ; bit position of lsb of reserved mask (linear modes)
 133 ;VBEModeInfoBlock.MaxPixelClock         dd 0    ; maximum pixel clock (in Hz) for graphics mode
 134
 135
 136 ; -----------------------------------------------------------------------------
 137 align 16
 138 GDTR64:                                 ; Global Descriptors Table Register
 139         dw gdt64_end - gdt64 - 1        ; limit of GDT (size minus one)
 140         dq 0x0000000000001000           ; linear address of GDT
 141
 142 align 16
 143 gdt64:                                  ; This structure is copied to 0x0000000000001000
 144 SYS64_NULL_SEL equ $-gdt64              ; Null Segment
 145         dq 0x0000000000000000
 146 SYS64_CODE_SEL equ $-gdt64              ; Code segment, read/execute, nonconforming
 147         dq 0x0020980000000000           ; 0x00209A0000000000
 148 SYS64_DATA_SEL equ $-gdt64              ; Data segment, read/write, expand down
 149         dq 0x0000900000000000           ; 0x0020920000000000
 150 gdt64_end:
 151
 152 align 16
 153 IDTR64:                                 ; Interrupt Descriptor Table Register
 154         dw 256*16-1                     ; limit of IDT (size minus one) (4096 bytes - 1)
 155         dq 0x0000000000000000           ; linear address of IDT
 156 ; -----------------------------------------------------------------------------
 157
 158
 159 ; =============================================================================
 160 ; EOF