4.115
Last change
on this file since 2d7ae960 was
2d7ae960,
checked in by Joel Sherrill <joel.sherrill@…>, on 06/11/12 at 18:37:29
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v850 port: Initial addition with BSP for simulator in GDB
Port
+ v850 does not have appear to have any optimized bit scan instructions
+ v850 does have single instructions for wap u16 and u32
+ Code path optimization preferences set
+ Add BSP variants for each GCC CPU model flag and a README
- v850e1 variant does not work (fails during BSP initialization)
BSP for GDB v850 Simulator
+ linkcmds matches defaults in GDB simulator with RTEMS mods
+ crt1.c added from v850 newlib port for main()
+ BSP exits cleanly
+ printk and console I/O work
+ uses clock tick from IDLE task
+ Tests not requiring real clock ISR work
Documentation
+ CPU Supplment chapter for v850 added
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-
Property mode set to
100644
|
File size:
1.4 KB
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1 | # NEC V850 startup code |
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2 | |
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3 | .section .text |
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4 | .global _start |
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5 | |
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6 | _start: |
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7 | |
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8 | #if defined(__v850e__) || defined(__v850e2__) || defined(__v850e2v3__) |
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9 | |
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10 | movea 255, r0, r20 |
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11 | mov 65535, r21 |
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12 | mov hilo(_stack), sp |
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13 | mov hilo(__ep), ep |
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14 | mov hilo(__gp), gp |
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15 | mov hilo(__ctbp), r6 |
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16 | ldsr r6, ctbp |
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17 | mov hilo(_edata), r6 |
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18 | mov hilo(_end), r7 |
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19 | .L0: |
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20 | st.w r0, 0[r6] |
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21 | addi 4, r6, r6 |
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22 | cmp r7, r6 |
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23 | bl .L0 |
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24 | .L1: |
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25 | jarl ___main, r31 |
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26 | addi -16, sp, sp |
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27 | mov 0, r6 |
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28 | mov 0, r7 |
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29 | mov 0, r8 |
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30 | /* jarl _main, r31 */ |
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31 | jarl _boot_card, r31 |
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32 | mov r10, r6 |
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33 | jarl _exit, r31 |
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34 | |
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35 | # else |
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36 | movea 255, r0, r20 |
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37 | mov r0, r21 |
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38 | ori 65535, r0, r21 |
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39 | movhi hi(_stack), r0, sp |
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40 | movea lo(_stack), sp, sp |
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41 | movhi hi(__ep), r0, ep |
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42 | movea lo(__ep), ep, ep |
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43 | movhi hi(__gp), r0, gp |
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44 | movea lo(__gp), gp, gp |
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45 | |
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46 | movhi hi(_edata), r0, r6 |
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47 | movea lo(_edata), r6, r6 |
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48 | movhi hi(_end), r0, r7 |
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49 | movea lo(_end), r7, r7 |
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50 | .L0: |
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51 | st.b r0, 0[r6] |
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52 | addi 1, r6, r6 |
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53 | cmp r7, r6 |
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54 | bl .L0 |
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55 | .L1: |
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56 | /* jarl ___main, r31 */ |
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57 | addi -16, sp, sp |
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58 | mov 0, r6 |
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59 | mov 0, r7 |
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60 | mov 0, r8 |
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61 | /* jarl _main, r31 */ |
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62 | jarl _boot_card, r31 |
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63 | mov r10, r6 |
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64 | .L2: |
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65 | br .L2 |
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66 | /* jarl _exit, r31 */ |
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67 | # endif |
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68 | |
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69 | #if 0 |
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70 | .section .stack |
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71 | _stack: .long 1 |
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72 | #endif |
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73 | |
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74 | .section .data |
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75 | .global ___dso_handle |
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76 | .weak ___dso_handle |
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77 | ___dso_handle: |
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78 | .long 0 |
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