diff options
Diffstat (limited to 'arch/xtensa/include/asm/asm-uaccess.h')
| -rw-r--r-- | arch/xtensa/include/asm/asm-uaccess.h | 71 |
1 files changed, 0 insertions, 71 deletions
diff --git a/arch/xtensa/include/asm/asm-uaccess.h b/arch/xtensa/include/asm/asm-uaccess.h index 7f6cf4151843..7cec869136e3 100644 --- a/arch/xtensa/include/asm/asm-uaccess.h +++ b/arch/xtensa/include/asm/asm-uaccess.h @@ -24,76 +24,6 @@ #include <asm/processor.h> /* - * These assembly macros mirror the C macros in asm/uaccess.h. They - * should always have identical functionality. See - * arch/xtensa/kernel/sys.S for usage. - */ - -#define KERNEL_DS 0 -#define USER_DS 1 - -/* - * get_fs reads current->thread.current_ds into a register. - * On Entry: - * <ad> anything - * <sp> stack - * On Exit: - * <ad> contains current->thread.current_ds - */ - .macro get_fs ad, sp - GET_CURRENT(\ad,\sp) -#if THREAD_CURRENT_DS > 1020 - addi \ad, \ad, TASK_THREAD - l32i \ad, \ad, THREAD_CURRENT_DS - TASK_THREAD -#else - l32i \ad, \ad, THREAD_CURRENT_DS -#endif - .endm - -/* - * set_fs sets current->thread.current_ds to some value. - * On Entry: - * <at> anything (temp register) - * <av> value to write - * <sp> stack - * On Exit: - * <at> destroyed (actually, current) - * <av> preserved, value to write - */ - .macro set_fs at, av, sp - GET_CURRENT(\at,\sp) - s32i \av, \at, THREAD_CURRENT_DS - .endm - -/* - * kernel_ok determines whether we should bypass addr/size checking. - * See the equivalent C-macro version below for clarity. - * On success, kernel_ok branches to a label indicated by parameter - * <success>. This implies that the macro falls through to the next - * insruction on an error. - * - * Note that while this macro can be used independently, we designed - * in for optimal use in the access_ok macro below (i.e., we fall - * through on error). - * - * On Entry: - * <at> anything (temp register) - * <success> label to branch to on success; implies - * fall-through macro on error - * <sp> stack pointer - * On Exit: - * <at> destroyed (actually, current->thread.current_ds) - */ - -#if ((KERNEL_DS != 0) || (USER_DS == 0)) -# error Assembly macro kernel_ok fails -#endif - .macro kernel_ok at, sp, success - get_fs \at, \sp - beqz \at, \success - .endm - -/* * user_ok determines whether the access to user-space memory is allowed. * See the equivalent C-macro version below for clarity. * @@ -147,7 +77,6 @@ * <at> destroyed */ .macro access_ok aa, as, at, sp, error - kernel_ok \at, \sp, .Laccess_ok_\@ user_ok \aa, \as, \at, \error .Laccess_ok_\@: .endm |