diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/arm/kernel/entry-header.S')
| -rw-r--r-- | ANDROID_3.4.5/arch/arm/kernel/entry-header.S | 179 |
1 files changed, 0 insertions, 179 deletions
diff --git a/ANDROID_3.4.5/arch/arm/kernel/entry-header.S b/ANDROID_3.4.5/arch/arm/kernel/entry-header.S deleted file mode 100644 index 9a8531ea..00000000 --- a/ANDROID_3.4.5/arch/arm/kernel/entry-header.S +++ /dev/null @@ -1,179 +0,0 @@ -#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 alignment_trap, rtemp -#ifdef CONFIG_ALIGNMENT_TRAP - ldr \rtemp, .LCcralign - ldr \rtemp, [\rtemp] - mcr p15, 0, \rtemp, c1, c0 -#endif - .endm - - @ - @ Store/load the USER SP and LR registers by switching to the SYS - @ mode. Useful in Thumb-2 mode where "stm/ldm rd, {sp, lr}^" is not - @ available. Should only be called from SVC mode - @ - .macro store_user_sp_lr, rd, rtemp, offset = 0 - mrs \rtemp, cpsr - eor \rtemp, \rtemp, #(SVC_MODE ^ SYSTEM_MODE) - msr cpsr_c, \rtemp @ switch to the SYS mode - - str sp, [\rd, #\offset] @ save sp_usr - str lr, [\rd, #\offset + 4] @ save lr_usr - - eor \rtemp, \rtemp, #(SVC_MODE ^ SYSTEM_MODE) - msr cpsr_c, \rtemp @ switch back to the SVC mode - .endm - - .macro load_user_sp_lr, rd, rtemp, offset = 0 - mrs \rtemp, cpsr - eor \rtemp, \rtemp, #(SVC_MODE ^ SYSTEM_MODE) - msr cpsr_c, \rtemp @ switch to the SYS mode - - ldr sp, [\rd, #\offset] @ load sp_usr - ldr lr, [\rd, #\offset + 4] @ load lr_usr - - eor \rtemp, \rtemp, #(SVC_MODE ^ SYSTEM_MODE) - msr cpsr_c, \rtemp @ switch back to the SVC mode - .endm - -#ifndef CONFIG_THUMB2_KERNEL - .macro svc_exit, rpsr - msr spsr_cxsf, \rpsr -#if defined(CONFIG_CPU_V6) - ldr r0, [sp] - strex r1, r2, [sp] @ clear the exclusive monitor - ldmib sp, {r1 - pc}^ @ load r1 - pc, cpsr -#elif defined(CONFIG_CPU_32v6K) - clrex @ clear the exclusive monitor - ldmia sp, {r0 - pc}^ @ load r0 - pc, cpsr -#else - ldmia sp, {r0 - pc}^ @ load r0 - pc, cpsr -#endif - .endm - - .macro restore_user_regs, fast = 0, offset = 0 - ldr r1, [sp, #\offset + S_PSR] @ get calling cpsr - ldr lr, [sp, #\offset + S_PC]! @ get pc - msr spsr_cxsf, r1 @ save in spsr_svc -#if defined(CONFIG_CPU_V6) - strex r1, r2, [sp] @ clear the exclusive monitor -#elif defined(CONFIG_CPU_32v6K) - clrex @ clear the exclusive monitor -#endif - .if \fast - ldmdb sp, {r1 - lr}^ @ get calling r1 - lr - .else - ldmdb sp, {r0 - lr}^ @ get calling r0 - lr - .endif - mov r0, r0 @ ARMv5T and earlier require a nop - @ after ldm {}^ - add sp, sp, #S_FRAME_SIZE - S_PC - movs pc, lr @ return & move spsr_svc into cpsr - .endm - - .macro get_thread_info, rd - mov \rd, sp, lsr #13 - mov \rd, \rd, lsl #13 - .endm - - @ - @ 32-bit wide "mov pc, reg" - @ - .macro movw_pc, reg - mov pc, \reg - .endm -#else /* CONFIG_THUMB2_KERNEL */ - .macro svc_exit, rpsr - ldr lr, [sp, #S_SP] @ top of the stack - ldrd r0, r1, [sp, #S_LR] @ calling lr and pc - clrex @ clear the exclusive monitor - stmdb lr!, {r0, r1, \rpsr} @ calling lr and rfe context - ldmia sp, {r0 - r12} - mov sp, lr - ldr lr, [sp], #4 - rfeia sp! - .endm - - .macro restore_user_regs, fast = 0, offset = 0 - clrex @ clear the exclusive monitor - mov r2, sp - load_user_sp_lr r2, r3, \offset + S_SP @ calling sp, lr - ldr r1, [sp, #\offset + S_PSR] @ get calling cpsr - ldr lr, [sp, #\offset + S_PC] @ get pc - add sp, sp, #\offset + S_SP - msr spsr_cxsf, r1 @ save in spsr_svc - .if \fast - ldmdb sp, {r1 - r12} @ get calling r1 - r12 - .else - ldmdb sp, {r0 - r12} @ get calling r0 - r12 - .endif - add sp, sp, #S_FRAME_SIZE - S_SP - movs pc, lr @ return & move spsr_svc into cpsr - .endm - - .macro get_thread_info, rd - mov \rd, sp - lsr \rd, \rd, #13 - mov \rd, \rd, lsl #13 - .endm - - @ - @ 32-bit wide "mov pc, reg" - @ - .macro movw_pc, reg - mov pc, \reg - nop - .endm -#endif /* !CONFIG_THUMB2_KERNEL */ - -/* - * 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 |