18cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd/** 28cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * @file IA64entry.h 38cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * 48cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * @remark Copy of source code from linux kernel 58cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * @remark linux/arch/ia64/kernel/entry.h 68cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * 78cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd */ 88cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd 98cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#include <linux/config.h> 108cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd 118cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd/* 128cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * Preserved registers that are shared between code in ivt.S and entry.S. Be 138cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * careful not to step on these! 148cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd */ 158cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd 168cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define pKern p2 /**< will leave_kernel return to kernel-mode? */ 178cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define pUser p3 /**< will leave_kernel return to user-mode? */ 188cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define pSys p4 /**< are we processing a (synchronous) system call? */ 198cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define pNonSys p5 /**< complement of pSys */ 208cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd 218cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define PT(f) (IA64_PT_REGS_##f##_OFFSET) 228cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define SW(f) (IA64_SWITCH_STACK_##f##_OFFSET) 238cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd 248cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define PT_REGS_SAVES(off) \ 258cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .unwabi @svr4, 'i'; \ 268cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .fframe IA64_PT_REGS_SIZE+16+(off); \ 278cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .spillsp rp, PT(CR_IIP)+16+(off); \ 288cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .spillsp ar.pfs, PT(CR_IFS)+16+(off); \ 298cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .spillsp ar.unat, PT(AR_UNAT)+16+(off); \ 308cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .spillsp ar.fpsr, PT(AR_FPSR)+16+(off); \ 318cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .spillsp pr, PT(PR)+16+(off); 328cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd 338cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define PT_REGS_UNWIND_INFO(off) \ 348cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .prologue; \ 358cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd PT_REGS_SAVES(off); \ 368cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .body 378cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd 388cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define SWITCH_STACK_SAVES(off) \ 398cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .savesp ar.unat, SW(CALLER_UNAT)+16+(off); \ 408cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .savesp ar.fpsr, SW(AR_FPSR)+16+(off); \ 418cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .spillsp f2, SW(F2)+16+(off); .spillsp f3, SW(F3)+16+(off); \ 428cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .spillsp f4, SW(F4)+16+(off); .spillsp f5, SW(F5)+16+(off); \ 438cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .spillsp f16, SW(F16)+16+(off); .spillsp f17, SW(F17)+16+(off); \ 448cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .spillsp f18, SW(F18)+16+(off); .spillsp f19, SW(F19)+16+(off); \ 458cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .spillsp f20, SW(F20)+16+(off); .spillsp f21, SW(F21)+16+(off); \ 468cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .spillsp f22, SW(F22)+16+(off); .spillsp f23, SW(F23)+16+(off); \ 478cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .spillsp f24, SW(F24)+16+(off); .spillsp f25, SW(F25)+16+(off); \ 488cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .spillsp f26, SW(F26)+16+(off); .spillsp f27, SW(F27)+16+(off); \ 498cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .spillsp f28, SW(F28)+16+(off); .spillsp f29, SW(F29)+16+(off); \ 508cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .spillsp f30, SW(F30)+16+(off); .spillsp f31, SW(F31)+16+(off); \ 518cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .spillsp r4, SW(R4)+16+(off); .spillsp r5, SW(R5)+16+(off); \ 528cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .spillsp r6, SW(R6)+16+(off); .spillsp r7, SW(R7)+16+(off); \ 538cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .spillsp b0, SW(B0)+16+(off); .spillsp b1, SW(B1)+16+(off); \ 548cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .spillsp b2, SW(B2)+16+(off); .spillsp b3, SW(B3)+16+(off); \ 558cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .spillsp b4, SW(B4)+16+(off); .spillsp b5, SW(B5)+16+(off); \ 568cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .spillsp ar.pfs, SW(AR_PFS)+16+(off); .spillsp ar.lc, SW(AR_LC)+16+(off); \ 578cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .spillsp @priunat, SW(AR_UNAT)+16+(off); \ 588cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .spillsp ar.rnat, SW(AR_RNAT)+16+(off); \ 598cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .spillsp ar.bspstore, SW(AR_BSPSTORE)+16+(off); \ 608cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .spillsp pr, SW(PR)+16+(off)) 618cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd 628cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define DO_SAVE_SWITCH_STACK \ 638cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd movl r28=1f; \ 648cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd ;; \ 658cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd .fframe IA64_SWITCH_STACK_SIZE; \ 668cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd adds sp=-IA64_SWITCH_STACK_SIZE, sp; \ 678cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd mov.ret.sptk b7=r28, 1f; \ 688cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd SWITCH_STACK_SAVES(0); \ 698cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd br.cond.sptk.many save_switch_stack; \ 708cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd1: 718cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd 728cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define DO_LOAD_SWITCH_STACK \ 738cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd movl r28=1f; \ 748cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd ;; \ 758cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd invala; \ 768cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd mov.ret.sptk b7=r28, 1f; \ 778cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd br.cond.sptk.many load_switch_stack; \ 788cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd1: .restore sp; \ 798cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd adds sp=IA64_SWITCH_STACK_SIZE, sp 80