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 */
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 */
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#include <arch.h>
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#include <arch.h>
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#include <arch/cp0.h>
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#include <arch/cp0.h>
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#include <arch/exception.h>
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#include <arch/exception.h>
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#include <arch/asm/regname.h>
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#include <arch/asm.h>
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#include <mm/vm.h>
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#include <userspace.h>
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void arch_pre_mm_init(void)
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void arch_pre_mm_init(void)
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{
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{
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    /*
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    /*
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     * Switch to BEV normal level so that exception vectors point to the kernel.
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     * Switch to BEV normal level so that exception vectors point to the kernel.
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}
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}
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void arch_late_init(void)
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void arch_late_init(void)
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{
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{
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}
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}
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void userspace(void)
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{
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    /* EXL=1, UM=1, IE=1 */
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    cp0_status_write(cp0_status_read() | (cp0_status_exl_exception_bit |
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                          cp0_status_um_bit |
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                          cp0_status_ie_enabled_bit));
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    cp0_epc_write(UTEXT_ADDRESS);
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    userspace_asm(USTACK_ADDRESS+PAGE_SIZE);
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    while (1)
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        ;
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}
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/* Stack pointer saved when entering user mode */
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/* TODO: How do we do it on SMP system???? */
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__address supervisor_sp;
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void before_thread_runs_arch(void)
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{
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    supervisor_sp = (__address) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA];
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}
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