| /* |
| freebios/src/northbridge/nsc/gx1/gx_setup.inc |
| |
| Copyright (c) 2002 Christer Weinigel <wingel@hack.org> |
| |
| Setup the GX_BASE registers on a National Semiconductor Geode CPU |
| */ |
| |
| #include <cpu/amd/gx1def.h> |
| |
| movl %eax, %ebp /* Preserve bist */ |
| |
| gx_setup_start: |
| leal gx_setup_table, %esi |
| movl $gx_setup_len, %ecx |
| movl $GX_BASE, %edi |
| |
| gx_setup_loop: |
| movw (%esi), %di /* Only read the low word of address */ |
| addl $4, %esi |
| movl (%esi), %eax /* Data */ |
| addl $4, %esi |
| movl %eax, (%edi) |
| loop gx_setup_loop |
| |
| jmp gx_setup_end |
| |
| gx_setup_table: |
| /* Allow writes to config registers */ |
| .long DC_UNLOCK, DC_UNLOCK_MAGIC |
| .long DC_GENERAL_CFG, 0 |
| .long DC_UNLOCK, 0 |
| |
| .long BC_DRAM_TOP, 0x3fffffff |
| .long BC_XMAP_1, 0x60 |
| .long BC_XMAP_2, 0 |
| .long BC_XMAP_3, 0 |
| |
| .long MC_BANK_CFG, 0x00700070 /* No DIMMS installed */ |
| .long MC_MEM_CNTRL1, XBUSARB |
| .long MC_GBASE_ADD, 0x7ff /* Almost 1GB */ |
| gx_setup_len = (.-gx_setup_table)/8 |
| |
| gx_setup_end: |
| nop |
| |
| movl %ebp, %eax /* Restore bist */ |
