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Various 440BX and Tyan S1846 related minor changes and fixes (trivial):

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- Only check the RAM from 0 - 640 KB and 768 KB - 1 MB now. That's
   available on all boards, regardless of what DIMMs you use.
   Tested on the Tyan S1846, works fine.

 - Properly set the PAM registers to allow the region from 768 KB - 1 MB
   to be used as normal RAM (required for the above).

 - Document all of this properly. Add/improve other documentation, too.

 - Simplify and document code in northbridge.c.

 - Cosmetics and coding style.

Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2701 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Uwe Hermann
2007-05-27 23:31:31 +00:00
parent 4cb85533dd
commit f5a6fd253c
5 changed files with 61 additions and 51 deletions
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5
targets/tyan/s1846/Config.lb
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@@ -22,10 +22,11 @@ target s1846
mainboard tyan/s1846
option ROM_SIZE = 256 * 1024
# option FALLBACK_SIZE = 256 * 1024
romimage "normal"
option USE_FALLBACK_IMAGE = 0
option ROM_IMAGE_SIZE=0x0e000
option ROM_IMAGE_SIZE = 56 * 1024
option LINUXBIOS_EXTRA_VERSION = ".0Normal"
payload /tmp/filo.elf
# payload /tmp/memtest
@@ -33,7 +34,7 @@ end
romimage "fallback"
option USE_FALLBACK_IMAGE = 1
option ROM_IMAGE_SIZE=0x0e000
option ROM_IMAGE_SIZE = 56 * 1024
option LINUXBIOS_EXTRA_VERSION = ".0Fallback"
payload /tmp/filo.elf
# payload /tmp/memtest