Last change
on this file since 994 was
934,
checked in by cfuguet, 10 years ago
|
reconf: add unitary test for the segment migration mechanism in the
dspin router.
|
File size:
1.5 KB
|
Line | |
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1 | /** |
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2 | * File : reset.S |
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3 | * Author : Cesar FUGUET <cesar.fuguet-tortolero@lip6.fr> |
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4 | * Date : 16 October 2014 |
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5 | */ |
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6 | |
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7 | #include "hard_config.h" |
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8 | #include "cpu_registers.h" |
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9 | |
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10 | .section .reset,"ax",@progbits |
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11 | |
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12 | .extern seg_stack_base |
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13 | .extern seg_kcode_base |
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14 | .extern main |
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15 | |
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16 | .globl reset |
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17 | .ent reset |
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18 | .align 2 |
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19 | |
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20 | #define P_MASK ((1<<P_WIDTH)-1) |
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21 | #define Y_MASK ((1<<Y_WIDTH)-1) |
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22 | |
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23 | reset: |
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24 | .set noreorder |
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25 | |
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26 | /* |
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27 | * SR register initialization |
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28 | * - Disable interrupts |
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29 | * - Keep the Bootstrap Exception Vector (BEV) bit set |
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30 | */ |
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31 | li k0, 0x00400000 |
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32 | mtc0 k0, CP0_STATUS |
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33 | |
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34 | /* |
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35 | * All processors compute: |
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36 | * cid = (x * Y_SIZE) + y |
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37 | * pid = (cid * NB_PROCS_MAX) + lpid |
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38 | */ |
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39 | mfc0 k0, CP0_PROCID |
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40 | andi k0, k0, 0xFFF /* k0 <= proc_xyl */ |
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41 | |
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42 | /* Only the processor 0 continues the execution */ |
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43 | beqz k0, 1f |
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44 | nop |
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45 | wait |
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46 | |
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47 | 1: /* processor 0 initializes stack pointer (16K) */ |
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48 | la sp, _stack |
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49 | addiu sp, sp, (1<<14) /* sp <= _stack + 16K */ |
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50 | |
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51 | /* jumps to main in kernel mode */ |
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52 | jal main |
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53 | nop |
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54 | |
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55 | j exit |
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56 | nop |
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57 | |
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58 | .set reorder |
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59 | .end reset |
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60 | |
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61 | |
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62 | |
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63 | .org 0x380 |
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64 | |
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65 | reset_exception_handler: |
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66 | mtc2 $0, MMU_DATA_PADDR_EXT |
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67 | j exception_handler |
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68 | |
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69 | |
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70 | |
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71 | .section .data |
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72 | |
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73 | /* |
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74 | * Stack segment definition |
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75 | */ |
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76 | _stack: |
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77 | .space (1<<14) /* 16 Kbytes */ |
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78 | |
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79 | /* |
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80 | * vim: tabstop=4 : softtabstop=4 : shiftwidth=4 : expandtab |
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81 | */ |
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