From: Chris Morrow <cmorrow@YottaYotta.com>
To: ecos-discuss@sourceware.cygnus.com
Subject: [ECOS] mips mmu setup
Date: Sun, 25 Feb 2001 18:15:00 -0000 [thread overview]
Message-ID: <3A99BC17.7EB5AA48@YottaYotta.com> (raw)
In-Reply-To: <3A99B9B6.444A2F22@YottaYotta.com>
For the vrc4373 port, the hal_mips_setup routine
use add instructions for the following sequence.
li tmp,PADDR_INC
add vaddr,vaddr,tmp
add paddr0,paddr0,tmp
Which is okay until you try to map in 2 gig of
address space at which point the vaddr calculate
will result in 0x80000000 during the last interation
of the loop. This will cause an interger overflow
exception.
All the add's in that function should probably be addu's.
--
Chris Morrow YottaYotta Inc.
email: cmorrow@yottayotta.com
phone: (780) 439 9000 ext 227
web: http://www.yottayotta.com
next prev parent reply other threads:[~2001-02-25 18:15 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-15 12:26 [ECOS] Header files in platform port Paul Pham
2001-01-15 13:22 ` [ECOS] hal_copy_data and hal_zero_bss Chris Morrow
2001-01-15 18:30 ` Jonathan Larmour
2001-02-25 18:05 ` Chris Morrow
2001-02-25 18:15 ` Chris Morrow [this message]
2001-02-26 12:39 ` [ECOS] mips mmu setup Jonathan Larmour
2001-02-26 15:22 ` [ECOS] hal_copy_data and hal_zero_bss Jonathan Larmour
2001-02-27 1:54 ` Chris Morrow
2001-02-27 10:25 ` Jonathan Larmour
2001-01-15 18:44 ` [ECOS] Header files in platform port Jonathan Larmour
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