| /* |
| * Copyright (C) Paul Mackerras 1997. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| */ |
| .text |
| |
| /* |
| * Use the BAT2 & 3 registers to map the 1st 16MB of RAM to |
| * the address given as the 1st argument. |
| */ |
| .globl setup_bats |
| setup_bats: |
| mfpvr 5 |
| rlwinm 5,5,16,16,31 /* r3 = 1 for 601, 4 for 604 */ |
| cmpwi 0,5,1 |
| li 0,0 |
| bne 4f |
| mtibatl 3,0 /* invalidate BAT first */ |
| ori 3,3,4 /* set up BAT registers for 601 */ |
| li 4,0x7f |
| mtibatu 2,3 |
| mtibatl 2,4 |
| oris 3,3,0x80 |
| oris 4,4,0x80 |
| mtibatu 3,3 |
| mtibatl 3,4 |
| b 5f |
| 4: mtdbatu 3,0 /* invalidate BATs first */ |
| mtibatu 3,0 |
| ori 3,3,0xff /* set up BAT registers for 604 */ |
| li 4,2 |
| mtdbatl 2,4 |
| mtdbatu 2,3 |
| mtibatl 2,4 |
| mtibatu 2,3 |
| oris 3,3,0x80 |
| oris 4,4,0x80 |
| mtdbatl 3,4 |
| mtdbatu 3,3 |
| mtibatl 3,4 |
| mtibatu 3,3 |
| 5: sync |
| isync |
| blr |
| |
| /* |
| * Flush the dcache and invalidate the icache for a range of addresses. |
| * |
| * flush_cache(addr, len) |
| */ |
| .global flush_cache |
| flush_cache: |
| addi 4,4,0x1f /* len = (len + 0x1f) / 0x20 */ |
| rlwinm. 4,4,27,5,31 |
| mtctr 4 |
| beqlr |
| 1: dcbf 0,3 |
| icbi 0,3 |
| addi 3,3,0x20 |
| bdnz 1b |
| sync |
| isync |
| blr |
