| 46,10 → 46,44 |
|---|
| #include <print.h> |
| #include <config.h> |
| #include <interrupt.h> |
| #include <arch/machine.h> |
| |
| #include <arch/regutils.h> |
| //#include <arch/drivers/init.h> |
| #include <userspace.h> |
| bootinfo_t bootinfo; |
| |
| //TODO: Remove include and move into exceptio.c |
| #include <arch/exception.h> |
| |
| #include <syscall/syscall.h> |
| static void tmp_swi_exception(int exc_no, istate_t* istate) |
| { |
| ASSERT(exc_no == EXC_SWI); |
| ASSERT(istate); |
| // TODO: Alf ... remove aftet swi_exception is tested |
| dprintf("\nSWI - istate dump input :\n"); |
| dprintf(" r0:%X r1:%X r2:%X r3:%X\n", istate->r0, istate->r1, istate->r2, istate->r3); |
| dprintf(" r4:%X r5:%X r6:%X r7:%X\n", istate->r4, istate->r5, istate->r6, istate->r7); |
| dprintf(" r8:%X r8:%X r10:%X r11:%X\n", istate->r8, istate->r9, istate->r10, istate->r11); |
| dprintf(" r12:%X r13:%X lr:%X spsr:%X\n", istate->r12, istate->sp, istate->lr, istate->spsr); |
| dprintf(" prev_lr:%X prev_sp:%X\n", istate->r12, istate->prev_lr, istate->prev_sp); |
| // call kernel to serve syscall |
| istate->r0 = syscall_handler( |
| istate->r0, |
| istate->r1, |
| istate->r2, |
| istate->r3, |
| istate->r4); |
| |
| // TODO: Alf ... remove aftet swi_exception is tested |
| dprintf("\nSWI - Istate dump after :\n"); |
| dprintf(" r0:%X r1:%X r2:%X r3:%X\n", istate->r0, istate->r1, istate->r2, istate->r3); |
| dprintf(" r4:%X r5:%X r6:%X r7:%X\n", istate->r4, istate->r5, istate->r6, istate->r7); |
| dprintf(" r8:%X r8:%X r10:%X r11:%X\n", istate->r8, istate->r9, istate->r10, istate->r11); |
| dprintf(" r12:%X r13:%X lr:%X spsr:%X\n", istate->r12, istate->sp, istate->lr, istate->spsr); |
| dprintf(" prev_lr:%X prev_sp:%X\n", istate->r12, istate->prev_lr, istate->prev_sp); |
| } |
| |
| |
| void arch_pre_main(void) |
| { |
| dprintf("arch_pre_main\n"); |
| 75,6 → 109,8 |
|---|
| |
| } |
| |
| void prefetch_exception_generator(void); |
| |
| void arch_post_mm_init(void) |
| { |
| dprintf("arch_post_mm_init start()\n"); |
| 82,14 → 118,23 |
|---|
| Note: Have to be after page_init() */ |
| exception_init(); |
| |
| machine_hw_map_init(); |
| // drivers_init(); |
| interrupt_init(); |
| |
| console_init(device_assign_devno()); |
| // console_init(device_assign_devno()); |
| //fb_init(0x12000000, 640, 480, 1920, VISUAL_RGB_8_8_8); |
| |
| interrupts_enable(); |
| // while(1); |
| // interrupts_enable(); |
| // asm __volatile__ ("ldr pc, =0x70000000"); // prefetch exception |
| //while(1); |
| /* |
| uspace_arg_t uspace; |
| uspace.uspace_entry = (void*)prefetch_exception_generator; |
| uspace.uspace_stack = (void*)0x6000000; |
| uspace.uspace_uarg = &uspace; |
| |
| userspace(&uspace); |
| */ |
| dprintf("arch_post_mm_init end()\n"); |
| } |
| |
| 125,5 → 170,95 |
|---|
| /* TODO */ |
| } |
| |
| /** Struct to hold general purpose register values */ |
| typedef struct { |
| uint32_t r0; |
| uint32_t r1; |
| uint32_t r2; |
| uint32_t r3; |
| uint32_t r4; |
| uint32_t r5; |
| uint32_t r6; |
| uint32_t r7; |
| uint32_t r8; |
| uint32_t r9; |
| uint32_t r10; |
| uint32_t r11; |
| uint32_t r12; |
| uint32_t sp; |
| uint32_t lr; |
| uint32_t pc; |
| } ustate_t; |
| |
| |
| void prefetch_exception_generator(void) { |
| asm __volatile__ ( |
| "ldr pc, =0x7000000" |
| ); |
| |
| } |
| |
| /** Change processor mode and jump into addres specified in |
| * kernel_uarg.uspace_entry |
| * \param kernel_uarg information needed for correct setting of userspace |
| */ |
| void userspace(uspace_arg_t *kernel_uarg) |
| { |
| // WILL be changed .. after exception return .. eret will be done |
| /* |
| volatile ustate_t ustate; |
| dprintf("userspce krnl_uard .uspace_uarg(%X), .uspace_entry(%X), .uspace_stack(%X)\n", |
| (unsigned int)(kernel_uarg->uspace_uarg), |
| kernel_uarg->uspace_entry, |
| kernel_uarg->uspace_stack); |
| // Step 1 ... prepare user space environmen |
| // set first paramater |
| ustate.r0 = (uintptr_t) kernel_uarg->uspace_uarg; |
| // clear other registers |
| ustate.r1 = ustate.r2 = ustate.r3 = ustate.r4 = |
| ustate.r5 = ustate.r6 = ustate.r7 = ustate.r8 = |
| ustate.r9 = ustate.r10 = ustate.r11 = ustate.r12 = 1; |
| ustate.lr = 3; |
| // set user stack |
| ustate.sp = ((uint32_t)kernel_uarg->uspace_stack)+PAGE_SIZE; |
| // set where uspace executin starts |
| ustate.pc = (uintptr_t) kernel_uarg->uspace_entry; |
| |
| // status register in user mode |
| ipl_t cpsr = current_status_reg_read(); |
| cpsr &= ~STATUS_REG_MODE_MASK | USER_MODE; |
| // |
| ipl_t tmpsr = (cpsr & ~STATUS_REG_MODE_MASK) | ABORT_MODE; |
| |
| asm __volatile__ ( |
| "mov r0, %0 \n" // save pointer into ustate struct |
| "mov r1, %1 \n" // save cspr |
| "msr cpsr_c, %2 \n" // change mode into any exception mode |
| "msr spsr_c, r1 \n" // set saved cpsr ... as user mode |
| "ldmfd r0, {r0-r12, sp, lr, pc}^\n" // jump into user mode |
| : // no output |
| : "r"(&ustate), "r"(cpsr), "r"(tmpsr) // |
| : "r0","r1" |
| ); |
| |
| while(1) |
| ; |
| */ |
| |
| } |
| /** @} |
| */ |
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