| #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 |
