diff options
Diffstat (limited to 'src/arch')
| -rw-r--r-- | src/arch/x86/include/mode_switch.h | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/src/arch/x86/include/mode_switch.h b/src/arch/x86/include/mode_switch.h index 24efb1ef58..4235db9be3 100644 --- a/src/arch/x86/include/mode_switch.h +++ b/src/arch/x86/include/mode_switch.h @@ -3,10 +3,18 @@ #include <stdint.h> #if ENV_X86_64 -int protected_mode_call_narg(uint32_t arg_count, - uint32_t func_ptr, +/* + * Assembly code that drops into protected mode and calls the function + * specified as first argument, which must have been compiled for x86_32. + * After the function returns it enters long mode again. + * The function pointer destination must be below 4GiB in physical memory. + * + * The called function has 0-3 arguments and returns an int. + */ +int protected_mode_call_3arg(uint32_t func_ptr, uint32_t opt_arg1, - uint32_t opt_arg2); + uint32_t opt_arg2, + uint32_t opt_arg3); /* * Drops into protected mode and calls the function, which must have been compiled for x86_32. @@ -17,7 +25,7 @@ int protected_mode_call_narg(uint32_t arg_count, */ static inline int protected_mode_call(void *func) { - return protected_mode_call_narg(0, (uintptr_t)func, 0, 0); + return protected_mode_call_3arg((uintptr_t)func, 0, 0, 0); } /* @@ -30,7 +38,7 @@ static inline int protected_mode_call(void *func) */ static inline int protected_mode_call_1arg(void *func, uint32_t arg1) { - return protected_mode_call_narg(1, (uintptr_t)func, arg1, 0); + return protected_mode_call_3arg((uintptr_t)func, arg1, 0, 0); } /* @@ -43,7 +51,7 @@ static inline int protected_mode_call_1arg(void *func, uint32_t arg1) */ static inline int protected_mode_call_2arg(void *func, uint32_t arg1, uint32_t arg2) { - return protected_mode_call_narg(2, (uintptr_t)func, arg1, arg2); + return protected_mode_call_3arg((uintptr_t)func, arg1, arg2, 0); } #else static inline int protected_mode_call(void *func) |