lfn
serial
ticket/834-toolchain-update
topic/msim-upgrade
topic/simplify-dev-export
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Last change
on this file since 5e2455a was d47f0e1, checked in by Jakub Jermar <jakub@…>, 20 years ago |
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SMP recovery patch #1. (SMP still broken)
Move ap_boot() to K_TEXT_START_2 section.
Change ap_boot() to cope with mapping of kernel address space.
Change some addresses in mps.c from kernel to physical.
MIPS.
Move msim dprinter device to 0xB0000000.
This address is from kseg1 (unmapped, uncached) segment.
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File size:
1.2 KB
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| 1 | SPARTAN kernel currently supports emulated MIPS R4000 32-bit
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| 2 | little-endian architecture. In other words, it can only run in MIPS
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| 3 | R4000 emulator called msim. This emulator is being developed by Viliam
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| 4 | Holub:
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| 5 |
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| 6 | http://nenya.ms.mff.cuni.cz/~holub/msim
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| 7 |
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| 8 | Note that msim diverges from real MIPS hardware in some aspects.
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| 9 | Therefore, some non-trivial changes will be necessary for a real
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| 10 | hardware port. The simulator is described in this manual:
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| 11 |
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| 12 | http://nenya.ms.mff.cuni.cz/~holub/msim/msim.ps
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| 13 |
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| 14 | You'll need a msim.conf script like this:
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| 15 |
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| 16 | #
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| 17 | # MSIM configuration script
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| 18 | #
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| 19 |
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| 20 | add dcpu mips1
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| 21 |
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| 22 | add rwm mainmem 0 16M load "kernel.bin"
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| 23 | add rom startmem 0x1fc00000 1k load "load.bin"
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| 24 |
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| 25 | add dprinter printer 0x10000000
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| 26 |
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| 27 |
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| 28 |
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| 29 | BOOTSTRAP
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| 30 | =========
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| 31 | Because the mips port uses binary executable format and for some other
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| 32 | architectural reasons, it shares one address for bootstrap entry
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| 33 | (address where control is passed from loader) and for TLB refill
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| 34 | exception entry. The former is used only once during system bootstrap.
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| 35 | From that point further, only TLB refill exception entry uses that
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| 36 | address. Note that this is the reason why main_bsp() is called from
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| 37 | tlb_refill() code.
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