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Rev 2304 Rev 2318
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}
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}
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/** Perform arm32 specific tasks needed before the new task is run. */
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/** Perform arm32 specific tasks needed before the new task is run. */
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void before_task_runs_arch(void)
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void before_task_runs_arch(void)
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{
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{
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        tlb_invalidate_all();
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    /* TODO */
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    /* TODO */
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}
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}
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/** Perform arm32 specific tasks needed before the new thread is scheduled. */
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/** Perform arm32 specific tasks needed before the new thread is scheduled. */
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void before_thread_runs_arch(void)
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void before_thread_runs_arch(void)
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    uint32_t lr;
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    uint32_t lr;
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    uint32_t pc;
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    uint32_t pc;
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} ustate_t;
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} ustate_t;
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void prefetch_exception_generator(void)  {
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 asm __volatile__ (
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    "ldr pc, =0x7000000"
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 );
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}
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/** Changes processor mode and jumps to the address specified in the first parameter.
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/** Changes processor mode and jumps to the address specified in the first parameter.
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 *
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 *
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 *  \param kernel_uarg   userspace settings (entry point, stack, ...)
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 *  \param kernel_uarg   userspace settings (entry point, stack, ...)
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 */
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 */
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void userspace(uspace_arg_t *kernel_uarg)
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void userspace(uspace_arg_t *kernel_uarg)
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        ustate.r9 = ustate.r10 = ustate.r11 = ustate.r12 = 1;
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        ustate.r9 = ustate.r10 = ustate.r11 = ustate.r12 = 1;
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    ustate.lr = 3;
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    ustate.lr = 3;
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    //set user stack
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    //set user stack
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    ustate.sp = ((uint32_t)kernel_uarg->uspace_stack) + PAGE_SIZE;
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    ustate.sp = ((uint32_t)kernel_uarg->uspace_stack) +
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            PAGE_SIZE - sizeof(void*);
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    //on the bottom of stack there is pointer to TLS
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    //set where uspace execution starts
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    //set where uspace execution starts
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    ustate.pc = (uintptr_t) kernel_uarg->uspace_entry;
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    ustate.pc = (uintptr_t) kernel_uarg->uspace_entry;
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    //status register in user mode
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    //status register in user mode
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    ipl_t cpsr = current_status_reg_read();
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    ipl_t cpsr = current_status_reg_read();