Skip to content

Commit

Permalink
---
Browse files Browse the repository at this point in the history
yaml
---
r: 35952
b: refs/heads/master
c: c1a9d41
h: refs/heads/master
v: v3
  • Loading branch information
Andi Kleen authored and Andi Kleen committed Sep 26, 2006
1 parent a613fc7 commit 9fe4cee
Show file tree
Hide file tree
Showing 2 changed files with 54 additions and 33 deletions.
2 changes: 1 addition & 1 deletion [refs]
Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: 383d079bfdfcfccd6a720405a510fe325b3e6576
refs/heads/master: c1a9d41f4f103bfef2ed0bea1e95b3190e39e448
85 changes: 53 additions & 32 deletions trunk/include/asm-x86_64/pda.h
Original file line number Diff line number Diff line change
Expand Up @@ -41,46 +41,67 @@ extern struct x8664_pda boot_cpu_pda[];
*/
extern void __bad_pda_field(void);

/* proxy_pda doesn't actually exist, but tell gcc it is accessed
for all PDA accesses so it gets read/write dependencies right. */
/*
* proxy_pda doesn't actually exist, but tell gcc it is accessed for
* all PDA accesses so it gets read/write dependencies right.
*/
extern struct x8664_pda _proxy_pda;

#define pda_offset(field) offsetof(struct x8664_pda, field)

#define pda_to_op(op,field,val) do { \
typedef typeof(_proxy_pda.field) T__; \
if (0) { T__ tmp__; tmp__ = (val); } \
switch (sizeof(_proxy_pda.field)) { \
case 2: \
asm(op "w %1,%%gs:%c2" : "+m" (_proxy_pda.field) : \
"ri" ((T__)val),"i"(pda_offset(field))); break; \
case 4: \
asm(op "l %1,%%gs:%c2" : "+m" (_proxy_pda.field) : \
"ri" ((T__)val),"i"(pda_offset(field))); break; \
case 8: \
asm(op "q %1,%%gs:%c2": "+m" (_proxy_pda.field) : \
"ri" ((T__)val),"i"(pda_offset(field))); break; \
default: __bad_pda_field(); \
} \
#define pda_to_op(op,field,val) do { \
typedef typeof(_proxy_pda.field) T__; \
if (0) { T__ tmp__; tmp__ = (val); } /* type checking */ \
switch (sizeof(_proxy_pda.field)) { \
case 2: \
asm(op "w %1,%%gs:%c2" : \
"+m" (_proxy_pda.field) : \
"ri" ((T__)val), \
"i"(pda_offset(field))); \
break; \
case 4: \
asm(op "l %1,%%gs:%c2" : \
"+m" (_proxy_pda.field) : \
"ri" ((T__)val), \
"i" (pda_offset(field))); \
break; \
case 8: \
asm(op "q %1,%%gs:%c2": \
"+m" (_proxy_pda.field) : \
"ri" ((T__)val), \
"i"(pda_offset(field))); \
break; \
default: \
__bad_pda_field(); \
} \
} while (0)

#define pda_from_op(op,field) ({ \
typeof(_proxy_pda.field) ret__; \
switch (sizeof(_proxy_pda.field)) { \
case 2: \
asm(op "w %%gs:%c1,%0":"=r" (ret__):\
"i" (pda_offset(field)), "m" (_proxy_pda.field)); break;\
case 4: \
asm(op "l %%gs:%c1,%0":"=r" (ret__):\
"i" (pda_offset(field)), "m" (_proxy_pda.field)); break;\
case 8: \
asm(op "q %%gs:%c1,%0":"=r" (ret__):\
"i" (pda_offset(field)), "m" (_proxy_pda.field)); break;\
default: __bad_pda_field(); \
} \
#define pda_from_op(op,field) ({ \
typeof(_proxy_pda.field) ret__; \
switch (sizeof(_proxy_pda.field)) { \
case 2: \
asm(op "w %%gs:%c1,%0" : \
"=r" (ret__) : \
"i" (pda_offset(field)), \
"m" (_proxy_pda.field)); \
break; \
case 4: \
asm(op "l %%gs:%c1,%0": \
"=r" (ret__): \
"i" (pda_offset(field)), \
"m" (_proxy_pda.field)); \
break; \
case 8: \
asm(op "q %%gs:%c1,%0": \
"=r" (ret__) : \
"i" (pda_offset(field)), \
"m" (_proxy_pda.field)); \
break; \
default: \
__bad_pda_field(); \
} \
ret__; })


#define read_pda(field) pda_from_op("mov",field)
#define write_pda(field,val) pda_to_op("mov",field,val)
#define add_pda(field,val) pda_to_op("add",field,val)
Expand Down

0 comments on commit 9fe4cee

Please sign in to comment.