SGH_WIKI - mywiki:hw:mips
https://sgh.tplinkdns.com/dokuwiki/
2026-04-04T16:49:38+00:00SGH_WIKI
https://sgh.tplinkdns.com/dokuwiki/
https://sgh.tplinkdns.com/dokuwiki/lib/exe/fetch.php?media=wiki:dokuwiki.svgtext/html2022-04-02T09:29:30+00:00Anonymous (anonymous@undisclosed.example.com)barrier_fence
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MIPS Pipeline Hazards, Memory Alignment and Barrier/Fences
Pipeline Hazards/Branch Delay
MIPS has explicit pipeline hazards; the instruction immediately following a branch or jump instruction will always be executed (this instruction is sometimes referred to as thetext/html2022-04-02T09:29:28+00:00Anonymous (anonymous@undisclosed.example.com)cache
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MIPS Cache
Reference [Cache Basic] Linux Cache TLB APIstext/html2022-04-02T09:29:30+00:00Anonymous (anonymous@undisclosed.example.com)linkscript
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Link Script
Reference: | |
Example
OUTPUT_FORMAT("elf32-tradbigmips")
OUTPUT_ARCH(mips)
ENTRY(_start)
SECTIONS
{
.text : {
*(.text)
*(.rodata)
*(.rodata1)
*(.rodata.str1.4)
}
.reginfo : { *(.reginfo) }
.priv_data ALIGN(4096): {
priv_data.o (*.data*)
priv_data.o (*.bss*)
}
.data : {
*(.data)
}
.bss : {
*(.dynbss)
*(.bss)
}
/*check this priv_data section address/size
readelf -S ../bin_be/mpe_fw_be.elf readelf -S ../bin_be/mpe_fw_be.e…text/html2022-04-02T09:29:28+00:00Anonymous (anonymous@undisclosed.example.com)mipssimulator
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MIPS Simulator-SPIM
SPIM Simulator for Windows
[PcSpim For Windows download] pcspim_syscall
SPIM Example 1
# Sample spim program
#
# Written by Pat Troy, 11/8/2002
.data
prompt: .asciiz "Enter in an integer: "
str1: .asciiz "the answer is: "
newline: .asciiz "\n"
bye: .asciiz "Goodbye!\n"
.globl main
.text
main:
# initialize
li $s0, 10
# prompt for input
li $v0, 4
la $a0, prompt
syscall
# read in the value
li $v0, 5
syscall
move $s0, $v0
loop:
# print str1
li $v…text/html2022-04-02T09:29:28+00:00Anonymous (anonymous@undisclosed.example.com)pcspim_syscall
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SPIM System Call
example
li $v0, 1 # service 1 is print integer
add $a0, $t0, $zero # load desired value into argument register $a0, using pseudo-op
syscall
Table of Available Services
<html>
<table border=1>
<tr> <th>Service</th> <th>Code in $v0</th> <th>Arguments</th> <th>Result</th> </tr>
<tr><td>print integer</td> <td align="center">1</td> <td>$a0 = integer to print</td> <td> </td></tr>
<tr><td>print float</td> <td…text/html2022-04-02T09:29:26+00:00Anonymous (anonymous@undisclosed.example.com)start
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MIPS
MIPS quick Tutoria TLB Barrier/Pipeline Hazards/Align Link Script Guide cache MipsSimulator [MIPS ASM Programming] [ MIPS IV Instruction Set] [ MIPS exception] [ MIPS Vol3]
Common Instruction
For details, refer to below documents:
* [ MIPS IV Instruction Set]
* <http://en.wikipedia.org/wiki/MIPS_instruction_set#MIPS_assembly_language>
Normal CPU Load/Store Instructions
LB Load Byte LBU Load Byte Unsigned SB Store Byte LH Load Halfword LHU Load Halfword Unsign…text/html2022-04-02T09:29:26+00:00Anonymous (anonymous@undisclosed.example.com)tlb
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TLB Assemble Example 1
Reference: [{{:mywiki:hw:mips:mips_tlb.pdf|]}}
1 /* $OpenBSD: locore.S,v 1.18 1998/09/15 10:58:53 pefo Exp $ */
2 /*-
3 * Copyright (c) 1992, 1993
4 * The Regents of the University of California. All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * Digital Equipment Corporation and Ralph Campbell.
8 *
9 * Redistribution and use in source and binary forms, with or without
…