diff options
Diffstat (limited to 'arch/mips/lib')
| -rw-r--r-- | arch/mips/lib/memcpy.S | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/arch/mips/lib/memcpy.S b/arch/mips/lib/memcpy.S index d630a28a118b..c17ef80cf65a 100644 --- a/arch/mips/lib/memcpy.S +++ b/arch/mips/lib/memcpy.S @@ -114,7 +114,24 @@ .section __ex_table,"a"; \ PTR 9b, handler; \ .previous; \ + /* This is assembled in EVA mode */ \ + .else; \ + /* If loading from user or storing to user */ \ + .if ((\from == USEROP) && (type == LD_INSN)) || \ + ((\to == USEROP) && (type == ST_INSN)); \ +9: __BUILD_EVA_INSN(insn##e, reg, addr); \ + .section __ex_table,"a"; \ + PTR 9b, handler; \ + .previous; \ + .else; \ + /* \ + * Still in EVA, but no need for \ + * exception handler or EVA insn \ + */ \ + insn reg, addr; \ + .endif; \ .endif + /* * Only on the 64-bit kernel we can made use of 64-bit registers. */ @@ -186,6 +203,22 @@ #define _PREF(hint, addr, type) \ .if \mode == LEGACY_MODE; \ PREF(hint, addr); \ + .else; \ + .if ((\from == USEROP) && (type == SRC_PREFETCH)) || \ + ((\to == USEROP) && (type == DST_PREFETCH)); \ + /* \ + * PREFE has only 9 bits for the offset \ + * compared to PREF which has 16, so it may \ + * need to use the $at register but this \ + * register should remain intact because it's \ + * used later on. Therefore use $v1. \ + */ \ + .set at=v1; \ + PREFE(hint, addr); \ + .set noat; \ + .else; \ + PREF(hint, addr); \ + .endif; \ .endif #define PREFS(hint, addr) _PREF(hint, addr, SRC_PREFETCH) @@ -636,3 +669,47 @@ FEXPORT(__copy_user) __copy_user_common: /* Legacy Mode, user <-> user */ __BUILD_COPY_USER LEGACY_MODE USEROP USEROP + +#ifdef CONFIG_EVA + +/* + * For EVA we need distinct symbols for reading and writing to user space. + * This is because we need to use specific EVA instructions to perform the + * virtual <-> physical translation when a virtual address is actually in user + * space + */ + +LEAF(__copy_user_inatomic_eva) + b __copy_from_user_common + li t6, 1 + END(__copy_user_inatomic_eva) + +/* + * __copy_from_user (EVA) + */ + +LEAF(__copy_from_user_eva) + li t6, 0 /* not inatomic */ +__copy_from_user_common: + __BUILD_COPY_USER EVA_MODE USEROP KERNELOP +END(__copy_from_user_eva) + + + +/* + * __copy_to_user (EVA) + */ + +LEAF(__copy_to_user_eva) +__BUILD_COPY_USER EVA_MODE KERNELOP USEROP +END(__copy_to_user_eva) + +/* + * __copy_in_user (EVA) + */ + +LEAF(__copy_in_user_eva) +__BUILD_COPY_USER EVA_MODE USEROP USEROP +END(__copy_in_user_eva) + +#endif |