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#include <arch/types.h>
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#include <arch/types.h>
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#include <arch.h>
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#include <arch.h>
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#include <proc/thread.h>
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#include <proc/thread.h>
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#include <mm/vm.h>
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#include <mm/vm.h>
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/** Enter userspace
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 *
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 * Change CPU protection level to 3, enter userspace.
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 *
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 */
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void userspace(void)
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void userspace(void)
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{
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{
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    pri_t pri;
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    pri_t pri;
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    pri = cpu_priority_high();
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    pri = cpu_priority_high();
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        "pushl %2\n"
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        "pushl %2\n"
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        "pushl %3\n"
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        "pushl %3\n"
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        "pushl %4\n"
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        "pushl %4\n"
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        "iret"
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        "iret"
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        : : "i" (selector(UDATA_DES) | PL_USER), "i" (USTACK_ADDRESS+THREAD_STACK_SIZE-1000), "r" (pri), "i" (selector(UTEXT_DES) | PL_USER), "i" (UTEXT_ADDRESS));
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        : : "i" (selector(UDATA_DES) | PL_USER), "i" (USTACK_ADDRESS+THREAD_STACK_SIZE-1000), "r" (pri), "i" (selector(UTEXT_DES) | PL_USER), "i" (UTEXT_ADDRESS));
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    /* NOT REACHED */
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    /* Unreachable */
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    for(;;);
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    for(;;);
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}
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}