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Last change
on this file since 887 was
887,
checked in by cfuguet, 9 years ago
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reconf: add test for the recovery routing function on the dspin_router
- The test performs a reconfiguration of a cycle-free contour around a
blackhole in a 3x3 platform. The blackhole (faulty routers) is in
the cluster (1,1).
- Introduce a reconf:xicu driver in the softs directory.
For now this driver contains only a getter/setter for the
configuration registers in the reconf:vci_xicu.
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File size:
1.5 KB
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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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