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#include <arch/asm.h>
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#include <arch/asm.h>
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#include <mm/vm.h>
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#include <mm/vm.h>
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#include <userspace.h>
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#include <userspace.h>
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#include <arch/console.h>
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#include <arch/console.h>
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#include <memstr.h>
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#include <memstr.h>
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#include <arch/interrupt.h>
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/* Size of the code jumping to the exception handler code
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/* Size of the code jumping to the exception handler code
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 * - J+NOP
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 * - J+NOP
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 */
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 */
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#define EXCEPTION_JUMP_SIZE    8
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#define EXCEPTION_JUMP_SIZE    8
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#define NORM_EXC ((char *) 0x80000180)
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#define NORM_EXC ((char *) 0x80000180)
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#define CACHE_EXC ((char *) 0x80000100)
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#define CACHE_EXC ((char *) 0x80000100)
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#include <arch/debug.h>
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#include <arch/debug.h>
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#include <print.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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    /* It is not assumed by default */
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    cpu_priority_high();
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    /* Copy the exception vectors to the right places */
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    /* Copy the exception vectors to the right places */
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    memcpy(TLB_EXC, (char *)tlb_refill_entry, EXCEPTION_JUMP_SIZE);
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    memcpy(TLB_EXC, (char *)tlb_refill_entry, EXCEPTION_JUMP_SIZE);
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    memcpy(NORM_EXC, (char *)exception_entry, EXCEPTION_JUMP_SIZE);
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    memcpy(NORM_EXC, (char *)exception_entry, EXCEPTION_JUMP_SIZE);
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    memcpy(CACHE_EXC, (char *)cache_error_entry, EXCEPTION_JUMP_SIZE);
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    memcpy(CACHE_EXC, (char *)cache_error_entry, EXCEPTION_JUMP_SIZE);
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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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     * Clear the error level.
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     * Clear the error level.
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     */
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     */
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    cp0_status_write(cp0_status_read() & ~(cp0_status_bev_bootstrap_bit|cp0_status_erl_error_bit));
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    cp0_status_write(cp0_status_read() & ~(cp0_status_bev_bootstrap_bit|cp0_status_erl_error_bit));
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    /*
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     * Mask all interrupts
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     */
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    cp0_mask_all_int();
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    /*
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    /*
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     * Unmask hardware clock interrupt.
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     * Unmask hardware clock interrupt.
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     */
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     */
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    cp0_status_write(cp0_status_read() | (1<<cp0_status_im7_shift));
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    cp0_unmask_int(TIMER_INTERRUPT);
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    /*
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    /*
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     * Start hardware clock.
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     * Start hardware clock.
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     */
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     */
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    cp0_compare_write(cp0_compare_value + cp0_count_read());
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    cp0_compare_write(cp0_compare_value + cp0_count_read());