* unknown/unsupported videomode at boot leads to return in config manager

* boot config manager now allows to totally disable DMA access to HD

git-svn-id: svn://kolibrios.org@514 a494cfbc-eb01-0410-851d-a64ba20cac60

kernel/trunk/blkdev/hd_drv.inc

@@ -54,6 +54,9 @@ hd_read:
     call  find_empty_slot       ; ret in edi
     cmp   [hd_error],0
     jne   return_01
+; DMA read is permitted if [allow_dma_access]=1 or 2
+        cmp     [allow_dma_access], 2
+        ja      .nodma
         cmp     [dma_hdd], 1
         jnz     .nodma
         call    hd_read_dma
@@ -229,8 +232,9 @@ write_cache:
     cmp   eax,[PARTITION_END]
     ja    danger
 
-        cmp     [allow_dma_write], 1
-        jnz     .nodma
+; DMA write is permitted only if [allow_dma_access]=1
+        cmp     [allow_dma_access], 2
+        jae     .nodma
         cmp     [dma_hdd], 1
         jnz     .nodma
 ; Объединяем запись цепочки последовательных секторов в одно обращение к диску
@@ -601,7 +605,7 @@ cache_chain_size        db      0
 cache_chain_started     db      0
 dma_task_switched       db      0
 dma_hdd         db      0
-allow_dma_write db      0
+allow_dma_access db      0
 endg
 
 align 4

kernel/trunk/boot/booteng.inc

@@ -34,7 +34,7 @@ vrrmprint db      "Apply VRR? (picture frequency greater than 60Hz"
 ;          db      " Select port [1-3]: ",0
 ;no_com1   db      13,10,186, " No COM1 mouse",0
 ;no_com2   db      13,10,186, " No COM2 mouse",0         
-ask_dma   db      "Use DMA for HDD writing? [1-yes/2-no]: ",0
+ask_dma   db      "Use DMA for HDD access? [1-yes, 2-only for reading, 3-no]: ",0
 ;gr_direct db      186," Use direct LFB writing? "
 ;          db      "[1-yes/2-no] ? ",0
 ;mem_model db      13,10,186," Motherboard memory [1-16 Mb / 2-32 Mb / "
@@ -80,9 +80,10 @@ mode9     db      "320x200, EGA/CGA 256 colors",0
 mode10    db      "640x480, VGA 16 colors",0
 probeno_msg db    " (standard mode)",0
 probeok_msg db    " (check nonstandard modes)",0
-dma_msg   db      " [b] Use DMA for HDD writing:",0
+dma_msg   db      " [b] Use DMA for HDD access:",0
 on_msg    db      " on",13,10,0
 off_msg   db      " off",13,10,0
+readonly_msg db   " only for reading",13,10,0
 vrrm_msg  db      " [c] Use VRR:",0
 preboot_device_msg db " [d] Floppy image: ",0
 preboot_device_msgs dw 0,pdm1,pdm2,pdm3

kernel/trunk/boot/bootet.inc

@@ -34,7 +34,7 @@ vrrmprint db      "Kinnita VRR? (ekraani sagedus suurem kui 60Hz"
 ;          db      " Vali port [1-3]: ",0
 ;no_com1   db      13,10,186, " No COM1 mouse",0
 ;no_com2   db      13,10,186, " No COM2 mouse",0         
-ask_dma   db      "Use DMA for HDD writing? [1-jah/2-ei]: ",0
+ask_dma   db      "Use DMA for HDD access? [1-yes, 2-only for reading, 3-no]: ",0
 ;gr_direct db      186," Use direct LFB writing? "
 ;          db      "[1-yes/2-no] ? ",0
 ;mem_model db      13,10,186," Motherboard memory [1-16 Mb / 2-32 Mb / "
@@ -80,9 +80,10 @@ mode9     db      "320x200, EGA/CGA 256 v
 mode10    db      "640x480, VGA 16 vфrvi",0
 probeno_msg db    " (standard reziim)",0
 probeok_msg db    " (kontrolli ebastandardseid reziime)",0
-dma_msg   db      " [b] Use DMA for HDD writing:",0
+dma_msg   db      " [b] Use DMA for HDD access:",0
 on_msg    db      " sees",13,10,0
 off_msg   db      " vфljas",13,10,0
+readonly_msg db   " only for reading",13,10,0
 vrrm_msg  db      " [c] Kasuta VRR:",0
 preboot_device_msg db " [d] Disketi kujutis: ",0
 preboot_device_msgs dw 0,pdm1,pdm2,pdm3

kernel/trunk/boot/bootge.inc

@@ -39,7 +39,7 @@ vrrmprint db      "VRR verwenden? (Monitorfrequenz groesser als 60Hz"
 ;          db      " Waehle Port [1-3]: ",0
 ;no_com1   db      13,10,186, " Keine COM1 Maus",0
 ;no_com2   db      13,10,186, " Keine COM2 Maus",0         
-ask_dma   db      "Nutze DMA zum HDD Aufschreiben? [1-ja/2-nein]: ",0
+ask_dma   db      "Nutze DMA zum HDD Zugriff? [1-ja, 2-allein fur Lesen, 3-nein]: ",0
 ;gr_direct db      186," Benutze direct LFB? "
 ;          db      "[1-ja/2-nein] ? ",0
 ;mem_model db      13,10,186," Hauptspeicher [1-16 Mb / 2-32 Mb / "
@@ -88,6 +88,7 @@ probeok_msg db    " (teste nicht-standard Modi)",0
 dma_msg   db      " [b] Nutze DMA zum HDD Aufschreiben:",0
 on_msg    db      " an",13,10,0
 off_msg   db      " aus",13,10,0
+readonly_msg db   " fur Lesen",13,10,0
 vrrm_msg  db      " [c] Nutze VRR:",0
 preboot_device_msg db " [d] Diskettenimage: ",0
 preboot_device_msgs dw 0,pdm1,pdm2,pdm3

kernel/trunk/boot/bootru.inc

@@ -34,7 +34,7 @@ vrrmprint db      "
 ;          db      " Выберите порт [1-3]: ",0
 ;no_com1   db      13,10,186," No COM1 mouse",0
 ;no_com2   db      13,10,186," No COM2 mouse",0
-ask_dma   db      "Использовать DMA для записи на HDD? [1-да/2-нет]: ",0
+ask_dma   db      "Использовать DMA для доступа к HDD? [1-да, 2-только чтение, 3-нет]: ",0
 ;gr_direct db      186," Использовать линейный видеобуфер? "
 ;          db      "[1-да/2-нет]: ",0
 ;mem_model db      13,10,186," Объ+м памяти [1-16 Mb / 2-32 Mb / "
@@ -80,9 +80,10 @@ mode9     db      "320x200, EGA/CGA 256 梥⮢",0
 mode10    db      "640x480, VGA 16 цветов",0
 probeno_msg db    " (стандартный видеорежим)",0
 probeok_msg db    " (проверить нестандартные режимы)",0
-dma_msg   db      " [b] Использование DMA для записи на HDD:",0
+dma_msg   db      " [b] Использование DMA для доступа к HDD:",0
 on_msg    db      " вкл",13,10,0
 off_msg   db      " выкл",13,10,0
+readonly_msg db   " только чтение",13,10,0
 vrrm_msg  db      " [c] Использование VRR:",0
 preboot_device_msg db " [d] Образ дискеты: ",0
 preboot_device_msgs dw 0,pdm1,pdm2,pdm3

kernel/trunk/boot/preboot.inc

@@ -18,7 +18,7 @@ display_atboot      db  0 ; show boot screen messages ( 2-no )
 preboot_graph       db  0 ; graph mode
 preboot_gprobe      db  0 ; probe vesa3 videomodes (1-no, 2-yes)
 preboot_vrrm        db  0 ; use VRR_M (1-yes, 2- no)
-preboot_dma_write   db  0 ; use DMA for writing to HDD (1-yes, 2-no)
+preboot_dma         db  0 ; use DMA for access to HDD (1-always, 2-only for read, 3-never)
 preboot_device      db  0 ; boot device
                           ; (1-floppy 2-harddisk 3-kernel restart)
                           ;!!!! 0 - autodetect !!!!

kernel/trunk/kernel.asm

@@ -321,8 +321,8 @@ high_code:
 ; -----------------------------------------
 ;        movzx eax,byte [BOOT_VAR+0x9010]  ; mouse port
 ;        mov   [0xF604],byte 1  ;al
-        mov     al, [BOOT_VAR+0x901F]   ; DMA writing
-        mov     [allow_dma_write], al
+        mov     al, [BOOT_VAR+0x901F]   ; DMA access
+        mov     [allow_dma_access], al
         mov   al,[BOOT_VAR+0x9000]        ; bpp
         mov   [ScreenBPP],al
         movzx eax,word [BOOT_VAR+0x900A]  ; X max