--- zzzz-none-000/linux-3.10.107/arch/arc/include/asm/entry.h 2017-06-27 09:49:32.000000000 +0000 +++ scorpion-7490-727/linux-3.10.107/arch/arc/include/asm/entry.h 2021-02-04 17:41:59.000000000 +0000 @@ -1,43 +1,26 @@ /* + * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com) * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. - * - * Vineetg: March 2009 (Supporting 2 levels of Interrupts) - * Stack switching code can no longer reliably rely on the fact that - * if we are NOT in user mode, stack is switched to kernel mode. - * e.g. L2 IRQ interrupted a L1 ISR which had not yet completed - * it's prologue including stack switching from user mode - * - * Vineetg: Aug 28th 2008: Bug #94984 - * -Zero Overhead Loop Context shd be cleared when entering IRQ/EXcp/Trap - * Normally CPU does this automatically, however when doing FAKE rtie, - * we also need to explicitly do this. The problem in macros - * FAKE_RET_FROM_EXCPN and FAKE_RET_FROM_EXCPN_LOCK_IRQ was that this bit - * was being "CLEARED" rather then "SET". Actually "SET" clears ZOL context - * - * Vineetg: May 5th 2008 - * -Modified CALLEE_REG save/restore macros to handle the fact that - * r25 contains the kernel current task ptr - * - Defined Stack Switching Macro to be reused in all intr/excp hdlrs - * - Shaved off 11 instructions from RESTORE_ALL_INT1 by using the - * address Write back load ld.ab instead of seperate ld/add instn - * - * Amit Bhor, Sameer Dhavale: Codito Technologies 2004 */ #ifndef __ASM_ARC_ENTRY_H #define __ASM_ARC_ENTRY_H -#ifdef __ASSEMBLY__ #include /* For NR_syscalls defination */ -#include #include #include #include /* For VMALLOC_START */ -#include /* For THREAD_SIZE */ +#include + +#ifdef CONFIG_ISA_ARCOMPACT +#include /* ISA specific bits */ +#else +#include +#endif /* Note on the LD/ST addr modes with addr reg wback * @@ -50,194 +33,180 @@ * Eff Addr for load = [reg2] */ +.macro PUSH reg + st.a \reg, [sp, -4] +.endm + +.macro PUSHAX aux + lr r9, [\aux] + PUSH r9 +.endm + +.macro POP reg + ld.ab \reg, [sp, 4] +.endm + +.macro POPAX aux + POP r9 + sr r9, [\aux] +.endm + /*-------------------------------------------------------------- - * Save caller saved registers (scratch registers) ( r0 - r12 ) - * Registers are pushed / popped in the order defined in struct ptregs - * in asm/ptrace.h - *-------------------------------------------------------------*/ -.macro SAVE_CALLER_SAVED - st.a r0, [sp, -4] - st.a r1, [sp, -4] - st.a r2, [sp, -4] - st.a r3, [sp, -4] - st.a r4, [sp, -4] - st.a r5, [sp, -4] - st.a r6, [sp, -4] - st.a r7, [sp, -4] - st.a r8, [sp, -4] - st.a r9, [sp, -4] - st.a r10, [sp, -4] - st.a r11, [sp, -4] - st.a r12, [sp, -4] + * Helpers to save/restore Scratch Regs: + * used by Interrupt/Exception Prologue/Epilogue + *-------------------------------------------------------------*/ +.macro SAVE_R0_TO_R12 + PUSH r0 + PUSH r1 + PUSH r2 + PUSH r3 + PUSH r4 + PUSH r5 + PUSH r6 + PUSH r7 + PUSH r8 + PUSH r9 + PUSH r10 + PUSH r11 + PUSH r12 +.endm + +.macro RESTORE_R12_TO_R0 + POP r12 + POP r11 + POP r10 + POP r9 + POP r8 + POP r7 + POP r6 + POP r5 + POP r4 + POP r3 + POP r2 + POP r1 + POP r0 + +#ifdef CONFIG_ARC_CURR_IN_REG + ld r25, [sp, 12] +#endif .endm /*-------------------------------------------------------------- - * Restore caller saved registers (scratch registers) + * Helpers to save/restore callee-saved regs: + * used by several macros below *-------------------------------------------------------------*/ -.macro RESTORE_CALLER_SAVED - ld.ab r12, [sp, 4] - ld.ab r11, [sp, 4] - ld.ab r10, [sp, 4] - ld.ab r9, [sp, 4] - ld.ab r8, [sp, 4] - ld.ab r7, [sp, 4] - ld.ab r6, [sp, 4] - ld.ab r5, [sp, 4] - ld.ab r4, [sp, 4] - ld.ab r3, [sp, 4] - ld.ab r2, [sp, 4] - ld.ab r1, [sp, 4] - ld.ab r0, [sp, 4] +.macro SAVE_R13_TO_R24 + PUSH r13 + PUSH r14 + PUSH r15 + PUSH r16 + PUSH r17 + PUSH r18 + PUSH r19 + PUSH r20 + PUSH r21 + PUSH r22 + PUSH r23 + PUSH r24 +.endm + +.macro RESTORE_R24_TO_R13 + POP r24 + POP r23 + POP r22 + POP r21 + POP r20 + POP r19 + POP r18 + POP r17 + POP r16 + POP r15 + POP r14 + POP r13 .endm - /*-------------------------------------------------------------- - * Save callee saved registers (non scratch registers) ( r13 - r25 ) - * on kernel stack. - * User mode callee regs need to be saved in case of - * -fork and friends for replicating from parent to child - * -before going into do_signal( ) for ptrace/core-dump - * Special case handling is required for r25 in case it is used by kernel - * for caching task ptr. Low level exception/ISR save user mode r25 - * into task->thread.user_r25. So it needs to be retrieved from there and - * saved into kernel stack with rest of callee reg-file + * Collect User Mode callee regs as struct callee_regs - needed by + * fork/do_signal/unaligned-access-emulation. + * (By default only scratch regs are saved on entry to kernel) + * + * Special handling for r25 if used for caching Task Pointer. + * It would have been saved in task->thread.user_r25 already, but to keep + * the interface same it is copied into regular r25 placeholder in + * struct callee_regs. *-------------------------------------------------------------*/ .macro SAVE_CALLEE_SAVED_USER - st.a r13, [sp, -4] - st.a r14, [sp, -4] - st.a r15, [sp, -4] - st.a r16, [sp, -4] - st.a r17, [sp, -4] - st.a r18, [sp, -4] - st.a r19, [sp, -4] - st.a r20, [sp, -4] - st.a r21, [sp, -4] - st.a r22, [sp, -4] - st.a r23, [sp, -4] - st.a r24, [sp, -4] + + mov r12, sp ; save SP as ref to pt_regs + SAVE_R13_TO_R24 #ifdef CONFIG_ARC_CURR_IN_REG - ; Retrieve orig r25 and save it on stack - ld r12, [r25, TASK_THREAD + THREAD_USER_R25] - st.a r12, [sp, -4] + ; Retrieve orig r25 and save it with rest of callee_regs + ld r12, [r12, PT_user_r25] + PUSH r12 #else - st.a r25, [sp, -4] + PUSH r25 #endif - /* move up by 1 word to "create" callee_regs->"stack_place_holder" */ - sub sp, sp, 4 .endm /*-------------------------------------------------------------- - * Save callee saved registers (non scratch registers) ( r13 - r25 ) - * kernel mode callee regs needed to be saved in case of context switch - * If r25 is used for caching task pointer then that need not be saved - * as it can be re-created from current task global + * Save kernel Mode callee regs at the time of Contect Switch. + * + * Special handling for r25 if used for caching Task Pointer. + * Kernel simply skips saving it since it will be loaded with + * incoming task pointer anyways *-------------------------------------------------------------*/ .macro SAVE_CALLEE_SAVED_KERNEL - st.a r13, [sp, -4] - st.a r14, [sp, -4] - st.a r15, [sp, -4] - st.a r16, [sp, -4] - st.a r17, [sp, -4] - st.a r18, [sp, -4] - st.a r19, [sp, -4] - st.a r20, [sp, -4] - st.a r21, [sp, -4] - st.a r22, [sp, -4] - st.a r23, [sp, -4] - st.a r24, [sp, -4] + + SAVE_R13_TO_R24 + #ifdef CONFIG_ARC_CURR_IN_REG - sub sp, sp, 8 -#else - st.a r25, [sp, -4] sub sp, sp, 4 +#else + PUSH r25 #endif .endm /*-------------------------------------------------------------- - * RESTORE_CALLEE_SAVED_KERNEL: - * Loads callee (non scratch) Reg File by popping from Kernel mode stack. - * This is reverse of SAVE_CALLEE_SAVED, - * - * NOTE: - * Ideally this shd only be called in switch_to for loading - * switched-IN task's CALLEE Reg File. - * For all other cases RESTORE_CALLEE_SAVED_FAST must be used - * which simply pops the stack w/o touching regs. + * Opposite of SAVE_CALLEE_SAVED_KERNEL *-------------------------------------------------------------*/ .macro RESTORE_CALLEE_SAVED_KERNEL - #ifdef CONFIG_ARC_CURR_IN_REG - add sp, sp, 8 /* skip callee_reg gutter and user r25 placeholder */ + add sp, sp, 4 /* skip usual r25 placeholder */ #else - add sp, sp, 4 /* skip "callee_regs->stack_place_holder" */ - ld.ab r25, [sp, 4] + POP r25 #endif - - ld.ab r24, [sp, 4] - ld.ab r23, [sp, 4] - ld.ab r22, [sp, 4] - ld.ab r21, [sp, 4] - ld.ab r20, [sp, 4] - ld.ab r19, [sp, 4] - ld.ab r18, [sp, 4] - ld.ab r17, [sp, 4] - ld.ab r16, [sp, 4] - ld.ab r15, [sp, 4] - ld.ab r14, [sp, 4] - ld.ab r13, [sp, 4] - + RESTORE_R24_TO_R13 .endm /*-------------------------------------------------------------- - * RESTORE_CALLEE_SAVED_USER: - * This is called after do_signal where tracer might have changed callee regs - * thus we need to restore the reg file. - * Special case handling is required for r25 in case it is used by kernel - * for caching task ptr. Ptrace would have modified on-kernel-stack value of - * r25, which needs to be shoved back into task->thread.user_r25 where from - * Low level exception/ISR return code will retrieve to populate with rest of - * callee reg-file. + * Opposite of SAVE_CALLEE_SAVED_USER + * + * ptrace tracer or unaligned-access fixup might have changed a user mode + * callee reg which is saved back to usual r25 storage location *-------------------------------------------------------------*/ .macro RESTORE_CALLEE_SAVED_USER - add sp, sp, 4 /* skip "callee_regs->stack_place_holder" */ - #ifdef CONFIG_ARC_CURR_IN_REG - ld.ab r12, [sp, 4] - st r12, [r25, TASK_THREAD + THREAD_USER_R25] + POP r12 #else - ld.ab r25, [sp, 4] + POP r25 #endif + RESTORE_R24_TO_R13 - ld.ab r24, [sp, 4] - ld.ab r23, [sp, 4] - ld.ab r22, [sp, 4] - ld.ab r21, [sp, 4] - ld.ab r20, [sp, 4] - ld.ab r19, [sp, 4] - ld.ab r18, [sp, 4] - ld.ab r17, [sp, 4] - ld.ab r16, [sp, 4] - ld.ab r15, [sp, 4] - ld.ab r14, [sp, 4] - ld.ab r13, [sp, 4] + ; SP is back to start of pt_regs +#ifdef CONFIG_ARC_CURR_IN_REG + st r12, [sp, PT_user_r25] +#endif .endm /*-------------------------------------------------------------- * Super FAST Restore callee saved regs by simply re-adjusting SP *-------------------------------------------------------------*/ .macro DISCARD_CALLEE_SAVED_USER - add sp, sp, 14 * 4 -.endm - -/*-------------------------------------------------------------- - * Restore User mode r25 saved in task_struct->thread.user_r25 - *-------------------------------------------------------------*/ -.macro RESTORE_USER_R25 - ld r25, [r25, TASK_THREAD + THREAD_USER_R25] + add sp, sp, SZ_CALLEE_REGS .endm /*------------------------------------------------------------- @@ -252,124 +221,8 @@ ld \out, [\tsk, TASK_THREAD_INFO] /* Go to end of page where stack begins (grows upwards) */ - add2 \out, \out, (THREAD_SIZE - 4)/4 /* one word GUTTER */ - -.endm - -/*-------------------------------------------------------------- - * Switch to Kernel Mode stack if SP points to User Mode stack - * - * Entry : r9 contains pre-IRQ/exception/trap status32 - * Exit : SP is set to kernel mode stack pointer - * If CURR_IN_REG, r25 set to "current" task pointer - * Clobbers: r9 - *-------------------------------------------------------------*/ - -.macro SWITCH_TO_KERNEL_STK - - /* User Mode when this happened ? Yes: Proceed to switch stack */ - bbit1 r9, STATUS_U_BIT, 88f - - /* OK we were already in kernel mode when this event happened, thus can - * assume SP is kernel mode SP. _NO_ need to do any stack switching - */ - -#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS - /* However.... - * If Level 2 Interrupts enabled, we may end up with a corner case: - * 1. User Task executing - * 2. L1 IRQ taken, ISR starts (CPU auto-switched to KERNEL mode) - * 3. But before it could switch SP from USER to KERNEL stack - * a L2 IRQ "Interrupts" L1 - * Thay way although L2 IRQ happened in Kernel mode, stack is still - * not switched. - * To handle this, we may need to switch stack even if in kernel mode - * provided SP has values in range of USER mode stack ( < 0x7000_0000 ) - */ - brlo sp, VMALLOC_START, 88f - - /* TODO: vineetg: - * We need to be a bit more cautious here. What if a kernel bug in - * L1 ISR, caused SP to go whaco (some small value which looks like - * USER stk) and then we take L2 ISR. - * Above brlo alone would treat it as a valid L1-L2 sceanrio - * instead of shouting alound - * The only feasible way is to make sure this L2 happened in - * L1 prelogue ONLY i.e. ilink2 is less than a pre-set marker in - * L1 ISR before it switches stack - */ - -#endif - - /* Save Pre Intr/Exception KERNEL MODE SP on kernel stack - * safe-keeping not really needed, but it keeps the epilogue code - * (SP restore) simpler/uniform. - */ - b.d 77f - - st.a sp, [sp, -12] ; Make room for orig_r0 and orig_r8 - -88: /*------Intr/Ecxp happened in user mode, "switch" stack ------ */ - - GET_CURR_TASK_ON_CPU r9 - -#ifdef CONFIG_ARC_CURR_IN_REG - - /* If current task pointer cached in r25, time to - * -safekeep USER r25 in task->thread_struct->user_r25 - * -load r25 with current task ptr - */ - st.as r25, [r9, (TASK_THREAD + THREAD_USER_R25)/4] - mov r25, r9 -#endif + add2 \out, \out, (THREAD_SIZE)/4 - /* With current tsk in r9, get it's kernel mode stack base */ - GET_TSK_STACK_BASE r9, r9 - -#ifdef PT_REGS_CANARY - st 0xabcdabcd, [r9, 0] -#endif - - /* Save Pre Intr/Exception User SP on kernel stack */ - st.a sp, [r9, -12] ; Make room for orig_r0 and orig_r8 - - /* CAUTION: - * SP should be set at the very end when we are done with everything - * In case of 2 levels of interrupt we depend on value of SP to assume - * that everything else is done (loading r25 etc) - */ - - /* set SP to point to kernel mode stack */ - mov sp, r9 - -77: /* ----- Stack Switched to kernel Mode, Now save REG FILE ----- */ - -.endm - -/*------------------------------------------------------------ - * "FAKE" a rtie to return from CPU Exception context - * This is to re-enable Exceptions within exception - * Look at EV_ProtV to see how this is actually used - *-------------------------------------------------------------*/ - -.macro FAKE_RET_FROM_EXCPN reg - - ld \reg, [sp, PT_status32] - bic \reg, \reg, (STATUS_U_MASK|STATUS_DE_MASK) - bset \reg, \reg, STATUS_L_BIT - sr \reg, [erstatus] - mov \reg, 55f - sr \reg, [eret] - - rtie -55: -.endm - -/* - * @reg [OUT] &thread_info of "current" - */ -.macro GET_CURR_THR_INFO_FROM_SP reg - and \reg, sp, ~(THREAD_SIZE - 1) .endm /* @@ -380,277 +233,6 @@ ld \reg, [\reg, THREAD_INFO_FLAGS] .endm -/*-------------------------------------------------------------- - * For early Exception Prologue, a core reg is temporarily needed to - * code the rest of prolog (stack switching). This is done by stashing - * it to memory (non-SMP case) or SCRATCH0 Aux Reg (SMP). - * - * Before saving the full regfile - this reg is restored back, only - * to be saved again on kernel mode stack, as part of ptregs. - *-------------------------------------------------------------*/ -.macro EXCPN_PROLOG_FREEUP_REG reg -#ifdef CONFIG_SMP - sr \reg, [ARC_REG_SCRATCH_DATA0] -#else - st \reg, [@ex_saved_reg1] -#endif -.endm - -.macro EXCPN_PROLOG_RESTORE_REG reg -#ifdef CONFIG_SMP - lr \reg, [ARC_REG_SCRATCH_DATA0] -#else - ld \reg, [@ex_saved_reg1] -#endif -.endm - -/*-------------------------------------------------------------- - * Save all registers used by Exceptions (TLB Miss, Prot-V, Mem err etc) - * Requires SP to be already switched to kernel mode Stack - * sp points to the next free element on the stack at exit of this macro. - * Registers are pushed / popped in the order defined in struct ptregs - * in asm/ptrace.h - * Note that syscalls are implemented via TRAP which is also a exception - * from CPU's point of view - *-------------------------------------------------------------*/ -.macro SAVE_ALL_EXCEPTION marker - - st \marker, [sp, 8] /* orig_r8 */ - st r0, [sp, 4] /* orig_r0, needed only for sys calls */ - - /* Restore r9 used to code the early prologue */ - EXCPN_PROLOG_RESTORE_REG r9 - - SAVE_CALLER_SAVED - st.a r26, [sp, -4] /* gp */ - st.a fp, [sp, -4] - st.a blink, [sp, -4] - lr r9, [eret] - st.a r9, [sp, -4] - lr r9, [erstatus] - st.a r9, [sp, -4] - st.a lp_count, [sp, -4] - lr r9, [lp_end] - st.a r9, [sp, -4] - lr r9, [lp_start] - st.a r9, [sp, -4] - lr r9, [erbta] - st.a r9, [sp, -4] - -#ifdef PT_REGS_CANARY - mov r9, 0xdeadbeef - st r9, [sp, -4] -#endif - - /* move up by 1 word to "create" pt_regs->"stack_place_holder" */ - sub sp, sp, 4 -.endm - -/*-------------------------------------------------------------- - * Save scratch regs for exceptions - *-------------------------------------------------------------*/ -.macro SAVE_ALL_SYS - SAVE_ALL_EXCEPTION orig_r8_IS_EXCPN -.endm - -/*-------------------------------------------------------------- - * Save scratch regs for sys calls - *-------------------------------------------------------------*/ -.macro SAVE_ALL_TRAP - /* - * Setup pt_regs->orig_r8. - * Encode syscall number (r8) in upper short word of event type (r9) - * N.B. #1: This is already endian safe (see ptrace.h) - * #2: Only r9 can be used as scratch as it is already clobbered - * and it's contents are no longer needed by the latter part - * of exception prologue - */ - lsl r9, r8, 16 - or r9, r9, orig_r8_IS_SCALL - - SAVE_ALL_EXCEPTION r9 -.endm - -/*-------------------------------------------------------------- - * Restore all registers used by system call or Exceptions - * SP should always be pointing to the next free stack element - * when entering this macro. - * - * NOTE: - * - * It is recommended that lp_count/ilink1/ilink2 not be used as a dest reg - * for memory load operations. If used in that way interrupts are deffered - * by hardware and that is not good. - *-------------------------------------------------------------*/ -.macro RESTORE_ALL_SYS - - add sp, sp, 4 /* hop over unused "pt_regs->stack_place_holder" */ - - ld.ab r9, [sp, 4] - sr r9, [erbta] - ld.ab r9, [sp, 4] - sr r9, [lp_start] - ld.ab r9, [sp, 4] - sr r9, [lp_end] - ld.ab r9, [sp, 4] - mov lp_count, r9 - ld.ab r9, [sp, 4] - sr r9, [erstatus] - ld.ab r9, [sp, 4] - sr r9, [eret] - ld.ab blink, [sp, 4] - ld.ab fp, [sp, 4] - ld.ab r26, [sp, 4] /* gp */ - RESTORE_CALLER_SAVED - - ld sp, [sp] /* restore original sp */ - /* orig_r0 and orig_r8 skipped automatically */ -.endm - - -/*-------------------------------------------------------------- - * Save all registers used by interrupt handlers. - *-------------------------------------------------------------*/ -.macro SAVE_ALL_INT1 - - /* restore original r9 , saved in int1_saved_reg - * It will be saved on stack in macro: SAVE_CALLER_SAVED - */ -#ifdef CONFIG_SMP - lr r9, [ARC_REG_SCRATCH_DATA0] -#else - ld r9, [@int1_saved_reg] -#endif - - /* now we are ready to save the remaining context :) */ - st orig_r8_IS_IRQ1, [sp, 8] /* Event Type */ - st 0, [sp, 4] /* orig_r0 , N/A for IRQ */ - SAVE_CALLER_SAVED - st.a r26, [sp, -4] /* gp */ - st.a fp, [sp, -4] - st.a blink, [sp, -4] - st.a ilink1, [sp, -4] - lr r9, [status32_l1] - st.a r9, [sp, -4] - st.a lp_count, [sp, -4] - lr r9, [lp_end] - st.a r9, [sp, -4] - lr r9, [lp_start] - st.a r9, [sp, -4] - lr r9, [bta_l1] - st.a r9, [sp, -4] - -#ifdef PT_REGS_CANARY - mov r9, 0xdeadbee1 - st r9, [sp, -4] -#endif - /* move up by 1 word to "create" pt_regs->"stack_place_holder" */ - sub sp, sp, 4 -.endm - -.macro SAVE_ALL_INT2 - - /* TODO-vineetg: SMP we can't use global nor can we use - * SCRATCH0 as we do for int1 because while int1 is using - * it, int2 can come - */ - /* retsore original r9 , saved in sys_saved_r9 */ - ld r9, [@int2_saved_reg] - - /* now we are ready to save the remaining context :) */ - st orig_r8_IS_IRQ2, [sp, 8] /* Event Type */ - st 0, [sp, 4] /* orig_r0 , N/A for IRQ */ - SAVE_CALLER_SAVED - st.a r26, [sp, -4] /* gp */ - st.a fp, [sp, -4] - st.a blink, [sp, -4] - st.a ilink2, [sp, -4] - lr r9, [status32_l2] - st.a r9, [sp, -4] - st.a lp_count, [sp, -4] - lr r9, [lp_end] - st.a r9, [sp, -4] - lr r9, [lp_start] - st.a r9, [sp, -4] - lr r9, [bta_l2] - st.a r9, [sp, -4] - -#ifdef PT_REGS_CANARY - mov r9, 0xdeadbee2 - st r9, [sp, -4] -#endif - - /* move up by 1 word to "create" pt_regs->"stack_place_holder" */ - sub sp, sp, 4 -.endm - -/*-------------------------------------------------------------- - * Restore all registers used by interrupt handlers. - * - * NOTE: - * - * It is recommended that lp_count/ilink1/ilink2 not be used as a dest reg - * for memory load operations. If used in that way interrupts are deffered - * by hardware and that is not good. - *-------------------------------------------------------------*/ - -.macro RESTORE_ALL_INT1 - add sp, sp, 4 /* hop over unused "pt_regs->stack_place_holder" */ - - ld.ab r9, [sp, 4] /* Actual reg file */ - sr r9, [bta_l1] - ld.ab r9, [sp, 4] - sr r9, [lp_start] - ld.ab r9, [sp, 4] - sr r9, [lp_end] - ld.ab r9, [sp, 4] - mov lp_count, r9 - ld.ab r9, [sp, 4] - sr r9, [status32_l1] - ld.ab r9, [sp, 4] - mov ilink1, r9 - ld.ab blink, [sp, 4] - ld.ab fp, [sp, 4] - ld.ab r26, [sp, 4] /* gp */ - RESTORE_CALLER_SAVED - - ld sp, [sp] /* restore original sp */ - /* orig_r0 and orig_r8 skipped automatically */ -.endm - -.macro RESTORE_ALL_INT2 - add sp, sp, 4 /* hop over unused "pt_regs->stack_place_holder" */ - - ld.ab r9, [sp, 4] - sr r9, [bta_l2] - ld.ab r9, [sp, 4] - sr r9, [lp_start] - ld.ab r9, [sp, 4] - sr r9, [lp_end] - ld.ab r9, [sp, 4] - mov lp_count, r9 - ld.ab r9, [sp, 4] - sr r9, [status32_l2] - ld.ab r9, [sp, 4] - mov ilink2, r9 - ld.ab blink, [sp, 4] - ld.ab fp, [sp, 4] - ld.ab r26, [sp, 4] /* gp */ - RESTORE_CALLER_SAVED - - ld sp, [sp] /* restore original sp */ - /* orig_r0 and orig_r8 skipped automatically */ - -.endm - - -/* Get CPU-ID of this core */ -.macro GET_CPU_ID reg - lr \reg, [identity] - lsr \reg, \reg, 8 - bmsk \reg, \reg, 7 -.endm - #ifdef CONFIG_SMP /*------------------------------------------------- @@ -719,6 +301,4 @@ #endif /* CONFIG_ARC_CURR_IN_REG */ -#endif /* __ASSEMBLY__ */ - #endif /* __ASM_ARC_ENTRY_H */