diff options
| author | Ralf Baechle <ralf@linux-mips.org> | 1997-09-12 01:29:55 +0000 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 1997-09-12 01:29:55 +0000 |
| commit | 545f435ebcfd94a1e7c20b46efe81b4d6ac4e698 (patch) | |
| tree | e9ce4bc598d06374bda906f18365984bf22a526a /arch/ppc/coffboot/misc.S | |
| parent | 4291a610eef89d0d5c69d9a10ee6560e1aa36c74 (diff) | |
Merge with Linux 2.1.55. More bugfixes and goodies from my private
CVS archive.
Diffstat (limited to 'arch/ppc/coffboot/misc.S')
| -rw-r--r-- | arch/ppc/coffboot/misc.S | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/arch/ppc/coffboot/misc.S b/arch/ppc/coffboot/misc.S new file mode 100644 index 000000000..ae08ee2fa --- /dev/null +++ b/arch/ppc/coffboot/misc.S @@ -0,0 +1,50 @@ +/* + * 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 BAT0 registers to map the 1st 8MB of RAM to 0xc0000000. + */ + .globl setup_bats +setup_bats: + mfpvr 3 + rlwinm 3,3,16,16,31 /* r3 = 1 for 601, 4 for 604 */ + cmpi 0,3,1 + lis 4,0xc000 + bne 4f + ori 4,4,4 /* set up BAT registers for 601 */ + li 5,0x7f + b 5f +4: ori 4,4,0xff /* set up BAT registers for 604 */ + li 5,2 + mtdbatu 0,4 + mtdbatl 0,5 +5: mtibatu 0,4 + mtibatl 0,5 + 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 |