| To: | sgi-mips <linux@cthulhu.engr.sgi.com> |
|---|---|
| Subject: | Question concerning memory configuration |
| From: | Jeff Harrell <jharrell@ti.com> |
| Date: | Fri, 28 Jan 2000 15:32:22 -0700 |
| Sender: | owner-linuxmips@oss.sgi.com |
|
I have question concerning the memory configuration variables in the
MIPS/Linux
codebase. I am working on a board that has 64Mbytes (0x400 0000) of SDRAM. We are using an R4000 core and have the memory map setup so that KSEG0 & KSEG1 both map to address 0x0 in physical memory. On our embedded system we are going to hard code the variable mips_memory_upper (This eventually is stored in memory_end). My question is what I should initialize the value to? Do I treat the top of memory as KSEG1 + 64Mbytes? (i.e., 0xA400 0000) or do I initialize it realative to 0? If anybody has any insights in this area, any information would be greatly appreciated. Thanks,
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Jeff Harrell Work: (801) 619-6104 Broadband Access group/TI jharrell@ti.com ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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