misc.S
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- /*
- * BK Id: SCCS/s.misc.S 1.7 05/18/01 06:20:29 patch
- */
- /*
- * 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.
- */
- #include "../../kernel/ppc_asm.tmpl"
- .text
- /*
- * Flush the dcache and invalidate the icache for a range of addresses.
- *
- * flush_cache(addr, len)
- */
- .global flush_cache
- flush_cache:
- mfpvr r5 # Get processor version register
- extrwi r5,r5,16,0 # Get the version bits
- cmpwi cr0,r5,0x0020 # Is this a 403-based processor?
- beq 1f # Yes, it is
- li r5,32 # It is not a 403, set to 32 bytes
- addi r4,r4,32-1 # len += line_size - 1
- srwi. r4,r4,5 # Convert from bytes to lines
- b 2f
- 1: li r5,16 # It is a 403, set to 16 bytes
- addi r4,r4,16-1 # len += line_size - 1
- srwi. r4,r4,4 # Convert from bytes to lines
- 2: mtctr r4 # Set-up the counter register
- beqlr # If it is 0, we are done
- 3: dcbf r0,r3 # Flush and invalidate the data line
- icbi r0,r3 # Invalidate the instruction line
- add r3,r3,r5 # Move to the next line
- bdnz 3b # Are we done yet?
- sync
- isync
- blr # Return to the caller