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annotate gcc/config/nds32/nds32_init.inc @ 131:84e7813d76e9

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gcc-8.2
author mir3636
date Thu, 25 Oct 2018 07:37:49 +0900
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131
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1 /*
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2 * nds32_init.inc
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3 *
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4 * NDS32 architecture startup assembler header file
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5 *
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6 */
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7
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8 .macro nds32_init
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9
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10 ! Initialize GP for data access
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11 la $gp, _SDA_BASE_
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12
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13 #if defined(__NDS32_EXT_EX9__)
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14 ! Check HW for EX9
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15 mfsr $r0, $MSC_CFG
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16 li $r1, (1 << 24)
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17 and $r2, $r0, $r1
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18 beqz $r2, 1f
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19
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20 ! Initialize the table base of EX9 instruction
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21 la $r0, _ITB_BASE_
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22 mtusr $r0, $ITB
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23 1:
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24 #endif
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25
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26 #if defined(__NDS32_EXT_FPU_DP__) || defined(__NDS32_EXT_FPU_SP__)
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27 ! Enable FPU
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28 mfsr $r0, $FUCOP_CTL
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29 ori $r0, $r0, #0x1
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30 mtsr $r0, $FUCOP_CTL
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31 dsb
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32
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33 ! Enable denormalized flush-to-Zero mode
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34 fmfcsr $r0
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35 ori $r0,$r0,#0x1000
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36 fmtcsr $r0
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37 dsb
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38 #endif
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39
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40 ! Initialize default stack pointer
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41 la $sp, _stack
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42
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43 .endm