| #include <linux/init.h> | |
| #include <linux/linkage.h> | |
| #include <asm/assembler.h> | |
| #include <asm/asm-offsets.h> | |
| #include <asm/errno.h> | |
| #include <asm/thread_info.h> | |
| @ Bad Abort numbers | |
| @ ----------------- | |
| @ | |
| #define BAD_PREFETCH 0 | |
| #define BAD_DATA 1 | |
| #define BAD_ADDREXCPTN 2 | |
| #define BAD_IRQ 3 | |
| #define BAD_UNDEFINSTR 4 | |
| @ | |
| @ Most of the stack format comes from struct pt_regs, but with | |
| @ the addition of 8 bytes for storing syscall args 5 and 6. | |
| @ This _must_ remain a multiple of 8 for EABI. | |
| @ | |
| #define S_OFF 8 | |
| /* | |
| * The SWI code relies on the fact that R0 is at the bottom of the stack | |
| * (due to slow/fast restore user regs). | |
| */ | |
| #if S_R0 != 0 | |
| #error "Please fix" | |
| #endif | |
| .macro zero_fp | |
| #ifdef CONFIG_FRAME_POINTER | |
| mov fp, #0 | |
| #endif | |
| .endm | |
| .macro get_thread_info, rd | |
| mov \rd, sp, lsr #13 | |
| mov \rd, \rd, lsl #13 | |
| .endm | |
| .macro alignment_trap, rtemp | |
| #ifdef CONFIG_ALIGNMENT_TRAP | |
| ldr \rtemp, .LCcralign | |
| ldr \rtemp, [\rtemp] | |
| mcr p15, 0, \rtemp, c1, c0 | |
| #endif | |
| .endm | |
| /* | |
| * These are the registers used in the syscall handler, and allow us to | |
| * have in theory up to 7 arguments to a function - r0 to r6. | |
| * | |
| * r7 is reserved for the system call number for thumb mode. | |
| * | |
| * Note that tbl == why is intentional. | |
| * | |
| * We must set at least "tsk" and "why" when calling ret_with_reschedule. | |
| */ | |
| scno .req r7 @ syscall number | |
| tbl .req r8 @ syscall table pointer | |
| why .req r8 @ Linux syscall (!= 0) | |
| tsk .req r9 @ current thread_info |