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| author | Kumar Gala <galak@kernel.crashing.org> | 2006-12-11 05:15:47 (GMT) |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2006-12-11 05:15:47 (GMT) |
| commit | 45d8e7aaf47668550fdb6c2d3abbe42f48a76df2 (patch) | |
| tree | 6884852ff83c8c8b7d09883783587e1db43ca9d4 /include/asm-powerpc/dcr-native.h | |
| parent | c99767974ebd2a719d849fdeaaa1674456f5283f (diff) | |
| download | linux-45d8e7aaf47668550fdb6c2d3abbe42f48a76df2.tar.xz | |
[POWERPC] Only export __mtdcr/__mfdcr if CONFIG_PPC_DCR is set
On 85xx we don't build in dcr support because the core doesn't implement the
instructions. This caused problems when building an 85xx kernel. Additionally
made it so we only build __mtdcr/__mfdcr if we are CONFIG_PPC_DCR_NATIVE.
The 85xx build issue wasPointed out by Dai Haruki.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'include/asm-powerpc/dcr-native.h')
| -rw-r--r-- | include/asm-powerpc/dcr-native.h | 37 |
1 files changed, 35 insertions, 2 deletions
diff --git a/include/asm-powerpc/dcr-native.h b/include/asm-powerpc/dcr-native.h index fd4a5f5..d7a1bc1 100644 --- a/include/asm-powerpc/dcr-native.h +++ b/include/asm-powerpc/dcr-native.h @@ -20,8 +20,7 @@ #ifndef _ASM_POWERPC_DCR_NATIVE_H #define _ASM_POWERPC_DCR_NATIVE_H #ifdef __KERNEL__ - -#include <asm/reg.h> +#ifndef __ASSEMBLY__ typedef struct {} dcr_host_t; @@ -32,7 +31,41 @@ typedef struct {} dcr_host_t; #define dcr_read(host, dcr_n) mfdcr(dcr_n) #define dcr_write(host, dcr_n, value) mtdcr(dcr_n, value) +/* Device Control Registers */ +void __mtdcr(int reg, unsigned int val); +unsigned int __mfdcr(int reg); +#define mfdcr(rn) \ + ({unsigned int rval; \ + if (__builtin_constant_p(rn)) \ + asm volatile("mfdcr %0," __stringify(rn) \ + : "=r" (rval)); \ + else \ + rval = __mfdcr(rn); \ + rval;}) + +#define mtdcr(rn, v) \ +do { \ + if (__builtin_constant_p(rn)) \ + asm volatile("mtdcr " __stringify(rn) ",%0" \ + : : "r" (v)); \ + else \ + __mtdcr(rn, v); \ +} while (0) + +/* R/W of indirect DCRs make use of standard naming conventions for DCRs */ +#define mfdcri(base, reg) \ +({ \ + mtdcr(base ## _CFGADDR, base ## _ ## reg); \ + mfdcr(base ## _CFGDATA); \ +}) + +#define mtdcri(base, reg, data) \ +do { \ + mtdcr(base ## _CFGADDR, base ## _ ## reg); \ + mtdcr(base ## _CFGDATA, data); \ +} while (0) +#endif /* __ASSEMBLY__ */ #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_DCR_NATIVE_H */ |