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#include <arch/mm/mmu.h>
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#include <arch/mm/mmu.h>
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#include <print.h>
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#include <print.h>
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#include <arch/types.h>
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#include <arch/types.h>
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#include <typedefs.h>
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#include <typedefs.h>
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#include <config.h>
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#include <config.h>
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#include <arch/trap.h>
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/** Initialize ITLB and DTLB.
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/** Initialize ITLB and DTLB.
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 *
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 *
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 * The goal of this function is to disable MMU
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 * The goal of this function is to disable MMU
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 * so that both TLBs can be purged and new
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 * so that both TLBs can be purged and new
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 * kernel 4M locked entry can be installed.
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 * kernel 4M locked entry can be installed.
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 * After TLB is initialized, MMU is enabled
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 * After TLB is initialized, MMU is enabled
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 * again.
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 * again.
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 *
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 * Switching MMU off imposes the requirement for
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 * the kernel to run in identity mapped environment.
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 */
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 */
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void tlb_arch_init(void)
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void tlb_arch_init(void)
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{
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{
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    tlb_tag_access_reg_t tag;
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    tlb_tag_access_reg_t tag;
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    tlb_data_t data;
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    tlb_data_t data;
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    data.g = true;
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    data.g = true;
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    itlb_data_in_write(data.value);
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    itlb_data_in_write(data.value);
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    dtlb_data_in_write(data.value);
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    dtlb_data_in_write(data.value);
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    /*
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     * Register window traps can occur before MMU is enabled again.
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     * This ensures that any such traps will be handled from
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     * kernel identity mapped trap handler.
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     */
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    trap_switch_trap_table();
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    tlb_invalidate_all();
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    tlb_invalidate_all();
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    dmmu_enable();
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    dmmu_enable();
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    immu_enable();
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    immu_enable();
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}
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}