Mercurial > nand-ecoscentric
diff packages/hal/powerpc/arch/current/src/context.S @ 2:443894e2e912 ecos-v1_2_1-release
Block commit of eCos version 1.2.1
| author | jlarmour |
|---|---|
| date | Tue, 11 May 1999 12:24:34 +0000 |
| parents | 3111d98ba7b3 |
| children | c38311975d4f |
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--- a/packages/hal/powerpc/arch/current/src/context.S +++ b/packages/hal/powerpc/arch/current/src/context.S @@ -22,7 +22,7 @@ # September 30, 1998. # # The Initial Developer of the Original Code is Cygnus. Portions created -# by Cygnus are Copyright (C) 1998 Cygnus Solutions. All Rights Reserved. +# by Cygnus are Copyright (C) 1998,1999 Cygnus Solutions. All Rights Reserved. # ------------------------------------------- # #####COPYRIGHTEND#### @@ -105,16 +105,25 @@ FUNC_START(hal_thread_switch_context) .set _reg,_reg+1 .endr - stw r0,0(sp) # R0 - stw r5,4(sp) # R5 = real SP, save in R1 slot - stw r2,8(sp) # R2 = TOC + stw r0,ppcreg_regs+0*4(sp) # R0 + stw r5,ppcreg_regs+1*4(sp) # R5 = real SP, save in R1 slot + stw r2,ppcreg_regs+2*4(sp) # R2 = TOC # CR cannot be treated as a special register since GCC will only # do partial restore of CR at function exit, depending on which # of CR2, CR3, and CR4 have been used in the given function. mfcr r5 # save CR. stw r5,ppcreg_cr(sp) - + +#ifdef CYGDBG_HAL_DEBUG_GDB_THREAD_SUPPORT + # Make the thread context look like an exception context if thread- + # aware debugging is required. This state does not need restoring. + mflr r5 + stw r5,ppcreg_pc(sp) # pc of caller + mfmsr r5 + stw r5,ppcreg_msr(sp) # msr (or PS) +#endif + save_special # save special regs mflr r5 # save LR == return link for this fn @@ -151,13 +160,11 @@ FUNC_START(hal_thread_load_context) .set _reg,_reg+1 .endr - lwz r0,0(sp) # R0 - lwz r2,8(sp) # R2 = TOC - lwz r3,12(sp) # load r3 -# lwz r4,16(sp) # load r4 -# lwz r5,20(sp) # load r5 + lwz r0,ppcreg_regs+0*4(sp) # R0 + lwz r2,ppcreg_regs+2*4(sp) # R2 = TOC + lwz r3,ppcreg_regs+3*4(sp) # load r3 - lwz sp,4(sp) # finally restore true SP + lwz sp,ppcreg_regs+1*4(sp) # finally restore true SP blr # jump to LR @@ -165,69 +172,95 @@ FUNC_START(hal_thread_load_context) # HAL longjmp, setjmp implementations # hal_setjmp saves only to callee save registers 13-31, r1[sp],r2, cr[2-4] # and lr into buffer supplied in r3[arg0] +# Note: These definitions are repeated in hal_arch.h. If changes are required +# remember to update both sets. + +#define CYGARC_JMP_BUF_SP 0 +#define CYGARC_JMP_BUF_R2 1 +#define CYGARC_JMP_BUF_R13 2 +#define CYGARC_JMP_BUF_R14 3 +#define CYGARC_JMP_BUF_R15 4 +#define CYGARC_JMP_BUF_R16 5 +#define CYGARC_JMP_BUF_R17 6 +#define CYGARC_JMP_BUF_R18 7 +#define CYGARC_JMP_BUF_R19 8 +#define CYGARC_JMP_BUF_R20 9 +#define CYGARC_JMP_BUF_R21 10 +#define CYGARC_JMP_BUF_R22 11 +#define CYGARC_JMP_BUF_R23 12 +#define CYGARC_JMP_BUF_R24 13 +#define CYGARC_JMP_BUF_R25 14 +#define CYGARC_JMP_BUF_R26 15 +#define CYGARC_JMP_BUF_R27 16 +#define CYGARC_JMP_BUF_R28 17 +#define CYGARC_JMP_BUF_R29 18 +#define CYGARC_JMP_BUF_R30 19 +#define CYGARC_JMP_BUF_R31 20 +#define CYGARC_JMP_BUF_LR 21 +#define CYGARC_JMP_BUF_CR 22 + +#define CYGARC_JMP_BUF_SIZE 23 FUNC_START(hal_setjmp) mfcr r5 - stw r5,88(r3) + stw r5, CYGARC_JMP_BUF_CR*4(r3) mflr r5 - stw r5,84(r3) - stw r31,80(r3) - stw r30,76(r3) - stw r29,72(r3) - stw r28,68(r3) - stw r27,64(r3) - stw r26,60(r3) - stw r25,56(r3) - stw r24,52(r3) - stw r23,48(r3) - stw r22,44(r3) - stw r21,40(r3) - stw r20,36(r3) - stw r19,32(r3) - stw r18,28(r3) - stw r17,24(r3) - stw r16,20(r3) - stw r15,16(r3) - stw r14,12(r3) - stw r13,8(r3) - stw r2,4(r3) # TOC, optimize out? - stw sp,0(r3) + stw r5, CYGARC_JMP_BUF_LR*4(r3) + stw r31,CYGARC_JMP_BUF_R31*4(r3) + stw r30,CYGARC_JMP_BUF_R30*4(r3) + stw r29,CYGARC_JMP_BUF_R29*4(r3) + stw r28,CYGARC_JMP_BUF_R28*4(r3) + stw r27,CYGARC_JMP_BUF_R27*4(r3) + stw r26,CYGARC_JMP_BUF_R26*4(r3) + stw r25,CYGARC_JMP_BUF_R25*4(r3) + stw r24,CYGARC_JMP_BUF_R24*4(r3) + stw r23,CYGARC_JMP_BUF_R23*4(r3) + stw r22,CYGARC_JMP_BUF_R22*4(r3) + stw r21,CYGARC_JMP_BUF_R21*4(r3) + stw r20,CYGARC_JMP_BUF_R20*4(r3) + stw r19,CYGARC_JMP_BUF_R19*4(r3) + stw r18,CYGARC_JMP_BUF_R18*4(r3) + stw r17,CYGARC_JMP_BUF_R17*4(r3) + stw r16,CYGARC_JMP_BUF_R16*4(r3) + stw r15,CYGARC_JMP_BUF_R15*4(r3) + stw r14,CYGARC_JMP_BUF_R14*4(r3) + stw r13,CYGARC_JMP_BUF_R13*4(r3) + stw r2, CYGARC_JMP_BUF_R2*4(r3) # TOC, optimize out? + stw sp, CYGARC_JMP_BUF_SP*4(r3) li r3,0 # return 0 blr # hal_longjmp loads state from r3[arg0] and returns # and lr into buffer supplied in r3[arg0] - + FUNC_START(hal_longjmp) - lwz r5,88(r3) + lwz r5,CYGARC_JMP_BUF_CR*4(r3) mtcr r5 - lwz r5,84(r3) + lwz r5,CYGARC_JMP_BUF_LR*4(r3) mtlr r5 - lwz r31,80(r3) - lwz r30,76(r3) - lwz r29,72(r3) - lwz r28,68(r3) - lwz r27,64(r3) - lwz r26,60(r3) - lwz r25,56(r3) - lwz r24,52(r3) - lwz r23,48(r3) - lwz r22,44(r3) - lwz r21,40(r3) - lwz r20,36(r3) - lwz r19,32(r3) - lwz r18,28(r3) - lwz r17,24(r3) - lwz r16,20(r3) - lwz r15,16(r3) - lwz r14,12(r3) - lwz r13,8(r3) - lwz r2,4(r3) - lwz sp,0(r3) + lwz r31,CYGARC_JMP_BUF_R31*4(r3) + lwz r30,CYGARC_JMP_BUF_R30*4(r3) + lwz r29,CYGARC_JMP_BUF_R29*4(r3) + lwz r28,CYGARC_JMP_BUF_R28*4(r3) + lwz r27,CYGARC_JMP_BUF_R27*4(r3) + lwz r26,CYGARC_JMP_BUF_R26*4(r3) + lwz r25,CYGARC_JMP_BUF_R25*4(r3) + lwz r24,CYGARC_JMP_BUF_R24*4(r3) + lwz r23,CYGARC_JMP_BUF_R23*4(r3) + lwz r22,CYGARC_JMP_BUF_R22*4(r3) + lwz r21,CYGARC_JMP_BUF_R21*4(r3) + lwz r20,CYGARC_JMP_BUF_R20*4(r3) + lwz r19,CYGARC_JMP_BUF_R19*4(r3) + lwz r18,CYGARC_JMP_BUF_R18*4(r3) + lwz r17,CYGARC_JMP_BUF_R17*4(r3) + lwz r16,CYGARC_JMP_BUF_R16*4(r3) + lwz r15,CYGARC_JMP_BUF_R15*4(r3) + lwz r14,CYGARC_JMP_BUF_R14*4(r3) + lwz r13,CYGARC_JMP_BUF_R13*4(r3) + lwz r2, CYGARC_JMP_BUF_R2*4(r3) + lwz sp, CYGARC_JMP_BUF_SP*4(r3) mr r3,r4 # return r4[arg1] blr - - #------------------------------------------------------------------------------ # end of context.S