100 lines
2.9 KiB
ArmAsm
100 lines
2.9 KiB
ArmAsm
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;@-------------------------------------------------------------------------
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;@-------------------------------------------------------------------------
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.globl _start
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_start:
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ldr pc,reset_handler
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ldr pc,undefined_handler
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ldr pc,swi_handler
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ldr pc,prefetch_handler
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ldr pc,data_handler
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ldr pc,hyp_handler
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ldr pc,irq_handler
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ldr pc,fiq_handler
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reset_handler: .word reset
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undefined_handler: .word hang
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swi_handler: .word smc
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prefetch_handler: .word hang
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data_handler: .word hang
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hyp_handler: .word hang
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irq_handler: .word hang
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fiq_handler: .word hang
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reset:
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;@ b skip
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mrs r0,cpsr
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bic r0,r0,#0x1F
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orr r0,r0,#0x13
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msr spsr_cxsf,r0
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add r0,pc,#4
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msr ELR_hyp,r0
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eret
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skip:
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mrc p15, 0, r1, c12, c0, 0 ;@ get vbar
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mov r0,#0x8000
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;@ mov r1,#0x0000
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ldmia r0!,{r2,r3,r4,r5,r6,r7,r8,r9}
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stmia r1!,{r2,r3,r4,r5,r6,r7,r8,r9}
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ldmia r0!,{r2,r3,r4,r5,r6,r7,r8,r9}
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stmia r1!,{r2,r3,r4,r5,r6,r7,r8,r9}
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mov r12,#0
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mcr p15, 0, r12, c7, c10, 1
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dsb
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mov r12, #0
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mcr p15, 0, r12, c7, c5, 0
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mov r12, #0
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mcr p15, 0, r12, c7, c5, 6
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dsb
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isb
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smc #0
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mrc p15,0,r2,c1,c0,0
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bic r2,#0x1000
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bic r2,#0x0004
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mcr p15,0,r2,c1,c0,0
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mov sp,#0x8000
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mov r0,pc
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bl notmain
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hang: b hang
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smc:
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mrc p15, 0, r1, c1, c1, 0
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bic r1, r1, #1
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mcr p15, 0, r1, c1, c1, 0
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movs pc, lr
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.globl PUT32
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PUT32:
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str r1,[r0]
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bx lr
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.globl GET32
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GET32:
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ldr r0,[r0]
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bx lr
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.globl dummy
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dummy:
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bx lr
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;@-------------------------------------------------------------------------
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;@-------------------------------------------------------------------------
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;@-------------------------------------------------------------------------
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;@
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;@ Copyright (c) 2012 David Welch dwelch@dwelch.com
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;@
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;@ Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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;@
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;@ The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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;@
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;@ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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;@
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;@-------------------------------------------------------------------------
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