wok annotate linld/stuff/src/XMM.ASM @ rev 20426

linld: fix xmm_driver
author Pascal Bellard <pascal.bellard@slitaz.org>
date Mon Aug 13 00:46:30 2018 +0200 (2018-08-13)
parents 04feaffdc0d9
children 049ced0bd387
rev   line source
pascal@19515 1 ;***************************************************************
pascal@19515 2 ;****** This file is distributed under GPL
pascal@19515 3 ;***************************************************************
pascal@19515 4 ideal
pascal@19515 5 %crefref
pascal@19515 6 %noincl
pascal@19515 7 %nomacs
pascal@19636 8 ifdef NO386
pascal@19636 9 p8086
pascal@19636 10 else
pascal@19515 11 p386
pascal@19636 12 endif
pascal@19515 13
pascal@19515 14 group DGROUP _TEXT,_BSS
pascal@19515 15 assume cs:DGROUP,ds:DGROUP
pascal@19515 16
pascal@19515 17 segment _BSS byte public use16 'BSS'
pascal@19515 18
pascal@19515 19 global xmm_handler:dword
pascal@19515 20 xmm_handler dd ?
pascal@19515 21
pascal@19515 22 ends _BSS
pascal@19515 23
pascal@19515 24 segment _TEXT byte public use16 'CODE'
pascal@19515 25
pascal@19515 26 ;***************************************************************
pascal@19515 27 ;void enable_a20_xmm();
pascal@19515 28 ;***************************************************************
pascal@19515 29 global _enable_a20_xmm:near
pascal@19515 30 proc _enable_a20_xmm near
pascal@19515 31
pascal@19515 32 mov ah,03h ;global enable a20
pascal@19515 33 call xmm_driver ;
pascal@19515 34 mov ah,05h ;local enable a20
pascal@19515 35 ;jmp xmm_driver ;
pascal@19515 36
pascal@19515 37 endp _enable_a20_xmm
pascal@19515 38
pascal@19515 39 ;***************************************************************
pascal@19515 40 ;Call xmm driver addr or 0 if no xmm
pascal@20142 41 ;void xmm_driver(ah)
pascal@19515 42 ;***************************************************************
pascal@19515 43 global xmm_driver:near
pascal@19515 44 proc xmm_driver near
pascal@19515 45
pascal@19876 46 push si
pascal@19876 47 mov si,offset xmm_handler
pascal@19636 48 ifndef NO386
pascal@20142 49 cmp [dword si],0
pascal@19636 50 else
pascal@20426 51 mov cx,[word si]
pascal@20426 52 or cx,[word si+2]
pascal@19636 53 endif
pascal@19515 54 jne @@gotit
pascal@19515 55
pascal@19515 56 xchg ax,cx ; save cmd
pascal@20142 57 mov ax,4300h ; installation check in al
pascal@19515 58 int 2fh
pascal@19515 59 mov bx,offset xmm_fail
pascal@19515 60 push cs
pascal@19515 61 pop es
pascal@19515 62 cmp al,80h
pascal@19515 63 jne @@err
pascal@20142 64 mov ax,4310h ; get driver address in es:bx
pascal@19515 65 int 2fh
pascal@19515 66 @@err:
pascal@19515 67 xchg ax,cx ; restore cmd
pascal@20426 68 mov [si],bx
pascal@20426 69 mov [si+2],es
pascal@19515 70 @@gotit:
pascal@20426 71 call [dword si] ; far ptr [si]
pascal@20142 72 dec ax ; Z=1=OK
pascal@19876 73 pop si
pascal@19515 74 ret
pascal@19538 75 xmm_fail:
pascal@19538 76 xor ax,ax
pascal@19538 77 cwd
pascal@19538 78 retf
pascal@19538 79
pascal@19515 80 endp xmm_driver
pascal@19515 81
pascal@19515 82
pascal@20142 83 struc image_himem ;struct image_himem {
pascal@20142 84 fd dw ? ; 0 int fd;
pascal@20142 85 fallback dd ? ; 2 u32 fallback;
pascal@20142 86 size dd ? ; 6 u32 size;
pascal@20142 87 remaining dd ? ;10 u32 remaining;
pascal@20142 88 buf dd ? ;14 u32 buf;
pascal@20142 89 bufv dw ? ;18 u32 *bufv;
pascal@20142 90 errmsg dw ? ;20 char *errmsg;
pascal@20142 91 chunk_size dd ? ;22 u32 chunk_size;
pascal@20142 92 next_chunk dw ? ;26 void (*next_chunk)(struct image_himem *);
pascal@20142 93 state dw ? ;28 u16 state;
pascal@20142 94 fd2close dw ? ;30 u16 fd2close;
pascal@20142 95 ends ;};
pascal@20142 96
pascal@19515 97 ;***************************************************************
pascal@19538 98 ;void xmm_alloc(struct image_himem *m)
pascal@19515 99 ;***************************************************************
pascal@19515 100 global _xmm_alloc:near
pascal@19515 101 proc _xmm_alloc near
pascal@19515 102
pascal@19538 103 pop ax
pascal@19515 104 pop bx
pascal@19538 105 push bx
pascal@19538 106 push ax
pascal@19515 107 ifndef NO386
pascal@20142 108 mov edx,[(image_himem bx).size] ; m->size
pascal@20142 109 ;dec edx
pascal@19515 110 shr edx,10 ; to Kb
pascal@19515 111 else
pascal@20142 112 ;mov ax,-1
pascal@20142 113 ;cwd
pascal@20142 114 ;add ax,[word (image_himem bx).size] ; lo m->size
pascal@20142 115 ;adc dx,[word (image_himem bx+2).size] ; hi m->size
pascal@20142 116 mov ax,[word (image_himem bx).size] ; lo m->size
pascal@20142 117 mov dx,[word (image_himem bx+2).size] ; hi m->size
pascal@20142 118 mov cl,16-10
pascal@20142 119 extrn N_LXLSH@:near
pascal@20142 120 call N_LXLSH@
pascal@19515 121 endif
pascal@19515 122 inc dx
pascal@19538 123 push bx
pascal@20142 124 mov ah,09h ;allocate blk of DX kilobytes
pascal@19515 125 call xmm_driver ;
pascal@19538 126 jnz @@goerr
pascal@19515 127 ;now: dx=handle of the blk
pascal@19515 128 mov ah,0Ch ;lock blk
pascal@19515 129 call xmm_driver ;
pascal@19515 130 ;now: dx:bx=addr of blk
pascal@19515 131 xchg ax,bx
pascal@19538 132 @@goerr:
pascal@19538 133 pop bx
pascal@19538 134 jnz @@err
pascal@20142 135 mov [word (image_himem bx).buf],ax ; lo m->buf
pascal@20142 136 mov [word (image_himem bx+2).buf],dx ; hi m->buf
pascal@19515 137 @@err:
pascal@19538 138 ret
pascal@19538 139
pascal@19515 140 endp _xmm_alloc
pascal@19515 141
pascal@19515 142 ends _TEXT
pascal@19515 143
pascal@19515 144 end
pascal@19515 145
pascal@19515 146 ;###### END OF FILE ############################################