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head/sys/arm64/arm64/support.S
| Show First 20 Lines • Show All 212 Lines • ▼ Show 20 Lines | EENTRY(suword64) | ||||
| SET_FAULT_HANDLER(x6, x2) /* And set it */ | SET_FAULT_HANDLER(x6, x2) /* And set it */ | ||||
| sttr x1, [x0] /* Try storing the data */ | sttr x1, [x0] /* Try storing the data */ | ||||
| SET_FAULT_HANDLER(xzr, x2) /* Reset the fault handler */ | SET_FAULT_HANDLER(xzr, x2) /* Reset the fault handler */ | ||||
| mov x0, #0 /* Success */ | mov x0, #0 /* Success */ | ||||
| ret /* Return */ | ret /* Return */ | ||||
| EEND(suword64) | EEND(suword64) | ||||
| END(suword) | END(suword) | ||||
| /* | |||||
| * fuswintr and suswintr are just like fusword and susword except that if | |||||
| * the page is not in memory or would cause a trap, then we return an error. | |||||
| * The important thing is to prevent sleep() and switch(). | |||||
| */ | |||||
| /* | |||||
| * Special handler so the trap code knows not to sleep. | |||||
| */ | |||||
| ENTRY(fsu_intr_fault) | |||||
| SET_FAULT_HANDLER(xzr, x1) /* Reset the handler function */ | |||||
| EXIT_USER_ACCESS_CHECK(w0, x1) | |||||
| mov x0, #-1 | |||||
| ret | |||||
| END(fsu_fault) | |||||
| /* | |||||
| * int fuswintr(void *) | |||||
| */ | |||||
| ENTRY(fuswintr) | |||||
| ldr x1, =(VM_MAXUSER_ADDRESS-3) | |||||
| cmp x0, x1 | |||||
| b.cs fsu_fault_nopcb | |||||
| adr x6, fsu_intr_fault /* Load the fault handler */ | |||||
| SET_FAULT_HANDLER(x6, x1) /* And set it */ | |||||
| ldtr w0, [x0] /* Try loading the data */ | |||||
| SET_FAULT_HANDLER(xzr, x1) /* Reset the fault handler */ | |||||
| ret /* Return */ | |||||
| END(fuswintr) | |||||
| /* | |||||
| * int suswintr(void *base, int word) | |||||
| */ | |||||
| ENTRY(suswintr) | |||||
| ldr x2, =(VM_MAXUSER_ADDRESS-3) | |||||
| cmp x0, x2 | |||||
| b.cs fsu_fault_nopcb | |||||
| adr x6, fsu_intr_fault /* Load the fault handler */ | |||||
| SET_FAULT_HANDLER(x6, x2) /* And set it */ | |||||
| sttr w1, [x0] /* Try storing the data */ | |||||
| SET_FAULT_HANDLER(xzr, x2) /* Reset the fault handler */ | |||||
| mov x0, #0 /* Success */ | |||||
| ret /* Return */ | |||||
| END(suswintr) | |||||
| ENTRY(setjmp) | ENTRY(setjmp) | ||||
| /* Store the stack pointer */ | /* Store the stack pointer */ | ||||
| mov x8, sp | mov x8, sp | ||||
| str x8, [x0], #8 | str x8, [x0], #8 | ||||
| /* Store the general purpose registers and lr */ | /* Store the general purpose registers and lr */ | ||||
| stp x19, x20, [x0], #16 | stp x19, x20, [x0], #16 | ||||
| stp x21, x22, [x0], #16 | stp x21, x22, [x0], #16 | ||||
| ▲ Show 20 Lines • Show All 62 Lines • Show Last 20 Lines | |||||