projects / ms2-kexec / blame
| Commit | Line | Data |
|---|---|---|
| 4e93cb00 MG |
1 | #include <linux/init.h> |
| 2 | #include <linux/linkage.h> | |
| 3 | ||
| 4 | #include <asm/assembler.h> | |
| 5 | #include <asm/asm-offsets.h> | |
| 6 | #include <asm/errno.h> | |
| 7 | #include <asm/thread_info.h> | |
| 8 | ||
| 9 | @ Bad Abort numbers | |
| 10 | @ ----------------- | |
| 11 | @ | |
| 12 | #define BAD_PREFETCH 0 | |
| 13 | #define BAD_DATA 1 | |
| 14 | #define BAD_ADDREXCPTN 2 | |
| 15 | #define BAD_IRQ 3 | |
| 16 | #define BAD_UNDEFINSTR 4 | |
| 17 | ||
| 18 | @ | |
| 19 | @ Most of the stack format comes from struct pt_regs, but with | |
| 20 | @ the addition of 8 bytes for storing syscall args 5 and 6. | |
| 21 | @ This _must_ remain a multiple of 8 for EABI. | |
| 22 | @ | |
| 23 | #define S_OFF 8 | |
| 24 | ||
| 25 | /* | |
| 26 | * The SWI code relies on the fact that R0 is at the bottom of the stack | |
| 27 | * (due to slow/fast restore user regs). | |
| 28 | */ | |
| 29 | #if S_R0 != 0 | |
| 30 | #error "Please fix" | |
| 31 | #endif | |
| 32 | ||
| 33 | .macro zero_fp | |
| 34 | #ifdef CONFIG_FRAME_POINTER | |
| 35 | mov fp, #0 | |
| 36 | #endif | |
| 37 | .endm | |
| 38 | ||
| 39 | .macro get_thread_info, rd | |
| 40 | mov \rd, sp, lsr #13 | |
| 41 | mov \rd, \rd, lsl #13 | |
| 42 | .endm | |
| 43 | ||
| 44 | .macro alignment_trap, rtemp | |
| 45 | #ifdef CONFIG_ALIGNMENT_TRAP | |
| 46 | ldr \rtemp, .LCcralign | |
| 47 | ldr \rtemp, [\rtemp] | |
| 48 | mcr p15, 0, \rtemp, c1, c0 | |
| 49 | #endif | |
| 50 | .endm | |
| 51 | ||
| 52 | ||
| 53 | /* | |
| 54 | * These are the registers used in the syscall handler, and allow us to | |
| 55 | * have in theory up to 7 arguments to a function - r0 to r6. | |
| 56 | * | |
| 57 | * r7 is reserved for the system call number for thumb mode. | |
| 58 | * | |
| 59 | * Note that tbl == why is intentional. | |
| 60 | * | |
| 61 | * We must set at least "tsk" and "why" when calling ret_with_reschedule. | |
| 62 | */ | |
| 63 | scno .req r7 @ syscall number | |
| 64 | tbl .req r8 @ syscall table pointer | |
| 65 | why .req r8 @ Linux syscall (!= 0) | |
| 66 | tsk .req r9 @ current thread_info |