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Stephen Rothwell
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Paul Mackerras
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Jun 28, 2006
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| @@ -1,2 +1,2 @@ | ||
| --- | ||
| refs/heads/master: a240da35a1087804cbdc3faba949445e64d1eecb | ||
| refs/heads/master: 127efeb286bb772019236182a1b4fc14ff2ae00c |
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| /* | ||
| * This file contains miscellaneous low-level functions. | ||
| * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) | ||
| * | ||
| * Largely rewritten by Cort Dougan (cort@cs.nmt.edu) | ||
| * and Paul Mackerras. | ||
| * | ||
| * Adapted for iSeries by Mike Corrigan (mikejc@us.ibm.com) | ||
| * PPC64 updates by Dave Engebretsen (engebret@us.ibm.com) | ||
| * | ||
| * 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 <asm/ppc_asm.h> | ||
|
|
||
| .text | ||
|
|
||
| #ifdef CONFIG_PPC64 | ||
| #define IN_SYNC twi 0,r5,0; isync | ||
| #define EIEIO_32 | ||
| #define SYNC_64 sync | ||
| #else /* CONFIG_PPC32 */ | ||
| #define IN_SYNC | ||
| #define EIEIO_32 eieio | ||
| #define SYNC_64 | ||
| #endif | ||
| /* | ||
| * Returns (address we are running at) - (address we were linked at) | ||
| * for use before the text and data are mapped to KERNELBASE. | ||
| */ | ||
|
|
||
| _GLOBAL(reloc_offset) | ||
| mflr r0 | ||
| bl 1f | ||
| 1: mflr r3 | ||
| LOAD_REG_IMMEDIATE(r4,1b) | ||
| subf r3,r4,r3 | ||
| mtlr r0 | ||
| blr | ||
|
|
||
| /* | ||
| * add_reloc_offset(x) returns x + reloc_offset(). | ||
| */ | ||
| _GLOBAL(add_reloc_offset) | ||
| mflr r0 | ||
| bl 1f | ||
| 1: mflr r5 | ||
| LOAD_REG_IMMEDIATE(r4,1b) | ||
| subf r5,r4,r5 | ||
| add r3,r3,r5 | ||
| mtlr r0 | ||
| blr | ||
|
|
||
| /* | ||
| * I/O string operations | ||
| * | ||
| * insb(port, buf, len) | ||
| * outsb(port, buf, len) | ||
| * insw(port, buf, len) | ||
| * outsw(port, buf, len) | ||
| * insl(port, buf, len) | ||
| * outsl(port, buf, len) | ||
| * insw_ns(port, buf, len) | ||
| * outsw_ns(port, buf, len) | ||
| * insl_ns(port, buf, len) | ||
| * outsl_ns(port, buf, len) | ||
| * | ||
| * The *_ns versions don't do byte-swapping. | ||
| */ | ||
| _GLOBAL(_insb) | ||
| cmpwi 0,r5,0 | ||
| mtctr r5 | ||
| subi r4,r4,1 | ||
| blelr- | ||
| 00: lbz r5,0(r3) | ||
| eieio | ||
| stbu r5,1(r4) | ||
| bdnz 00b | ||
| IN_SYNC | ||
| blr | ||
|
|
||
| _GLOBAL(_outsb) | ||
| cmpwi 0,r5,0 | ||
| mtctr r5 | ||
| subi r4,r4,1 | ||
| blelr- | ||
| 00: lbzu r5,1(r4) | ||
| stb r5,0(r3) | ||
| EIEIO_32 | ||
| bdnz 00b | ||
| SYNC_64 | ||
| blr | ||
|
|
||
| _GLOBAL(_insw) | ||
| cmpwi 0,r5,0 | ||
| mtctr r5 | ||
| subi r4,r4,2 | ||
| blelr- | ||
| 00: lhbrx r5,0,r3 | ||
| eieio | ||
| sthu r5,2(r4) | ||
| bdnz 00b | ||
| IN_SYNC | ||
| blr | ||
|
|
||
| _GLOBAL(_outsw) | ||
| cmpwi 0,r5,0 | ||
| mtctr r5 | ||
| subi r4,r4,2 | ||
| blelr- | ||
| 00: lhzu r5,2(r4) | ||
| EIEIO_32 | ||
| sthbrx r5,0,r3 | ||
| bdnz 00b | ||
| SYNC_64 | ||
| blr | ||
|
|
||
| _GLOBAL(_insl) | ||
| cmpwi 0,r5,0 | ||
| mtctr r5 | ||
| subi r4,r4,4 | ||
| blelr- | ||
| 00: lwbrx r5,0,r3 | ||
| eieio | ||
| stwu r5,4(r4) | ||
| bdnz 00b | ||
| IN_SYNC | ||
| blr | ||
|
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||
| _GLOBAL(_outsl) | ||
| cmpwi 0,r5,0 | ||
| mtctr r5 | ||
| subi r4,r4,4 | ||
| blelr- | ||
| 00: lwzu r5,4(r4) | ||
| stwbrx r5,0,r3 | ||
| EIEIO_32 | ||
| bdnz 00b | ||
| SYNC_64 | ||
| blr | ||
|
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||
| #ifdef CONFIG_PPC32 | ||
| _GLOBAL(__ide_mm_insw) | ||
| #endif | ||
| _GLOBAL(_insw_ns) | ||
| cmpwi 0,r5,0 | ||
| mtctr r5 | ||
| subi r4,r4,2 | ||
| blelr- | ||
| 00: lhz r5,0(r3) | ||
| eieio | ||
| sthu r5,2(r4) | ||
| bdnz 00b | ||
| IN_SYNC | ||
| blr | ||
|
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||
| #ifdef CONFIG_PPC32 | ||
| _GLOBAL(__ide_mm_outsw) | ||
| #endif | ||
| _GLOBAL(_outsw_ns) | ||
| cmpwi 0,r5,0 | ||
| mtctr r5 | ||
| subi r4,r4,2 | ||
| blelr- | ||
| 00: lhzu r5,2(r4) | ||
| sth r5,0(r3) | ||
| EIEIO_32 | ||
| bdnz 00b | ||
| SYNC_64 | ||
| blr | ||
|
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||
| #ifdef CONFIG_PPC32 | ||
| _GLOBAL(__ide_mm_insl) | ||
| #endif | ||
| _GLOBAL(_insl_ns) | ||
| cmpwi 0,r5,0 | ||
| mtctr r5 | ||
| subi r4,r4,4 | ||
| blelr- | ||
| 00: lwz r5,0(r3) | ||
| eieio | ||
| stwu r5,4(r4) | ||
| bdnz 00b | ||
| IN_SYNC | ||
| blr | ||
|
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||
| #ifdef CONFIG_PPC32 | ||
| _GLOBAL(__ide_mm_outsl) | ||
| #endif | ||
| _GLOBAL(_outsl_ns) | ||
| cmpwi 0,r5,0 | ||
| mtctr r5 | ||
| subi r4,r4,4 | ||
| blelr- | ||
| 00: lwzu r5,4(r4) | ||
| stw r5,0(r3) | ||
| EIEIO_32 | ||
| bdnz 00b | ||
| SYNC_64 | ||
| blr | ||
|
|
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