git.zerfleddert.de Git - linexec-j720/blob - asm/asm.asm

   1         TTL     C:\pocket\test\asm.cpp
   2
   3         AREA    |.drectve|, DRECTVE
   4         DCB     "-defaultlib:coredll.lib "
   5         DCB     "-defaultlib:corelibc.lib "
   6
   7         EXPORT  |?do_it@@YAXXZ|                         ; do_it
   8         AREA    |.pdata|, PDATA
   9 |$T222| DCD     |?do_it@@YAXXZ|
  10         DCD     0x40000100
  11         AREA    |.text|, CODE
  12 |?do_it@@YAXXZ| PROC                                    ; do_it
  13 |$M220|
  14
  15
  16                 mcr     p15, 0, r0, c7, c5, 0   ;/* invalidate i cache & BTB */
  17                 mrc     p15, 0, r0, c2, c0, 0
  18                 mov     r0, r0
  19                 sub     pc, pc, #4
  20
  21
  22 ; turn off LCD controller...
  23 ; I couldn't figure out how to use armasm.exe conditional with variables
  24 ; #if xscale
  25 ;               ldr     r9, =0x44000000
  26 ;               ldr     r8, [r9]
  27 ;               orr     r8, r8, #0x400
  28 ;               str     r8, [r9]
  29
  30 ; #elif strongarm
  31                 ldr     r9, =0xb0100000
  32                 ldr     r8, [r9]
  33                 bic     r8, r8, #1
  34                 str     r8, [r9]
  35
  36 ; turn off unused serial ports
  37
  38                 mov r8, #0
  39                 ldr r9, =0x80010000
  40                 str r8, [r9, #0xC]
  41                 ldr r9, =0x80050000
  42                 str r8, [r9, #0xC]
  43
  44 ; #endif
  45
  46                 add     r9, r1, #0x100
  47
  48 ; #if xscale
  49 ;               ldr     r5, =0xa0000100
  50 ;               ldr     r7, =0xa0400000
  51
  52 ; #elif strongarm
  53                 ldr     r5, =0xc0000100
  54                 ldr     r7, =0xc0400000
  55 ; #endif
  56
  57
  58 label           ldr     r8, [r9]
  59                 str     r8, [r5]
  60                 add     r9, r9, #4
  61                 add     r5, r5, #4
  62                 cmp     r5, r7
  63                 blt     label
  64
  65 ; #if xscale
  66 ;               MOV     r4, #0xA0000000
  67
  68 ; #elif strongarm
  69                 MOV     r4, #0xc0000000
  70 ; #endif
  71
  72                 add     r11,r4,#0x8000
  73
  74                 mov     r10,r2          ;machine number passed from DRAMloader
  75
  76                 mcr     p15, 0, r0, c8, c7, 0x00 ;/* invalidate I+D TLB */
  77                 mrc     p15, 0, r0, c2, c0, 0
  78                 mov     r0, r0
  79                 sub     pc, pc, #4
  80
  81 ; they skipped this, unnecessary? seems like we need to do this
  82
  83                 mcr     p15, 0, r0, c7, c5, 0   ;/* invalidate i cache & BTB */
  84
  85                 mov     r0, #0
  86                 mcr     p15, 0, r0, c13, c0, 0
  87                 mrc     p15, 0, r0, c2, c0, 0
  88                 mov     r0, r0
  89                 sub     pc, pc, #4
  90
  91 ; This is needed to get Linux 2.6 booting
  92                 mov     r0, #0
  93                 mcr     p15, 0, r0, c7, c10, 4  ; Drain write buffer
  94                 mcr     p15, 0, r0, c7, c7, 0   ; invalidate I+D & BTB
  95
  96                 mrc     p15, 0, r0, c1, c0, 0
  97                 bic     r0, r0, #5              ; MMU & Dcache off
  98                 bic     r0, r0, #0x1000         ; Icache off
  99                 mcr     p15, 0, r0, c1, c0, 0   ; disable the MMU & caches
 100                 mrc     p15, 0, r0, c2, c0, 0
 101                 mov     r0, r0
 102                 sub     pc, pc, #4
 103
 104
 105                 mov     r0, #0
 106                 mcr     p15, 0, r0, c13, c0, 0  ; clear PID
 107                 mcr     p15, 0, r0, c8, c7, 0   ; invalidate I+D TLB
 108                 mrc     p15, 0, r0, c2, c0, 0
 109                 mov     r0, r0
 110                 sub     pc, pc, #4
 111
 112 ;Set parameters for kernel
 113                 mov     r0, #0
 114                 mov     r1, r10
 115                 ldr     r2, [r2, #0]
 116                 mov     r2, #0
 117
 118 ; Jump into the kernel:
 119                 mov             pc, r11
 120
 121
 122 |$M221|
 123         ENDP  ; |?do_it@@YAXXZ|, do_it
 124         END
 125