98 lines
2.4 KiB
ArmAsm
98 lines
2.4 KiB
ArmAsm
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/*
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* Copyright (c) 2009 Corey Tabaka
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* 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,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <asm.h>
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.text
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/* void arch_enable_ints(void); */
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FUNCTION(arch_enable_ints)
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sti
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ret
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/* void arch_disable_ints(void); */
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FUNCTION(arch_disable_ints)
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cli
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ret
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/* int atomic_swap(int *ptr, int val); */
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FUNCTION(atomic_swap)
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movl 4(%esp), %edx
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movl 8(%esp), %eax
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xchgl %eax, (%edx)
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ret
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/* int atomic_add(int *ptr, int val); */
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FUNCTION(atomic_add)
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movl 4(%esp), %edx
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movl 8(%esp), %eax
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lock
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xadd %eax, (%edx)
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ret
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/* int atomic_and(int *ptr, int val); */
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FUNCTION(atomic_and)
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movl 4(%esp), %edx
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movl (%edx), %eax
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0:
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movl %eax, %ecx
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andl 8(%esp), %ecx
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lock
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cmpxchgl %ecx, (%edx)
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jnz 1f /* static prediction: branch forward not taken */
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ret
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1:
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jmp 0b
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/* int atomic_or(int *ptr, int val); */
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FUNCTION(atomic_or)
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movl 4(%esp), %edx
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movl (%edx), %eax
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0:
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movl %eax, %ecx
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orl 8(%esp), %ecx
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lock
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cmpxchgl %ecx, (%edx)
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jnz 1f /* static prediction: branch forward not taken */
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ret
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1:
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jmp 0b
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/* void arch_idle(); */
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FUNCTION(arch_idle)
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pushf
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popl %eax
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andl $0x200, %eax
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test %eax, %eax
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je 1f /* don't halt if local interrupts are disabled */
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hlt
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1:
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ret
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/* void arch_switch_stacks_and_call(addr_t call, addr_t stack) */
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FUNCTION(arch_switch_stacks_and_call)
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movl 4(%esp), %eax
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movl 8(%esp), %edx
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movl %edx, %esp
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call *%eax /* perhaps this should be a jmp? it's not used anywhere so I don't know. */
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