diff options
Diffstat (limited to 'c/src/lib/libcpu/powerpc/new-exceptions/bspsupport/ppc_exc.S')
| -rw-r--r-- | c/src/lib/libcpu/powerpc/new-exceptions/bspsupport/ppc_exc.S | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/c/src/lib/libcpu/powerpc/new-exceptions/bspsupport/ppc_exc.S b/c/src/lib/libcpu/powerpc/new-exceptions/bspsupport/ppc_exc.S deleted file mode 100644 index 511601d9ff..0000000000 --- a/c/src/lib/libcpu/powerpc/new-exceptions/bspsupport/ppc_exc.S +++ /dev/null @@ -1,177 +0,0 @@ -/* - * (c) 1999, Eric Valette valette@crf.canon.fr - * - * Modified and partially rewritten by Till Straumann, 2007 - * - * Modified by Sebastian Huber <sebastian.huber@embedded-brains.de>, 2008. - * - * Low-level assembly code for PPC exceptions. - * - * This file was written with the goal to eliminate - * ALL #ifdef <cpu_flavor> conditionals -- please do not - * reintroduce such statements. - */ - -/* Load macro definitions */ -#include <rtems/asm.h> -#include <rtems/system.h> -#include <rtems/score/percpu.h> - -#include "ppc_exc_asm_macros.h" - -/******************************************************/ -/* PROLOGUES */ -/******************************************************/ - - /* - * Expand prologue snippets for classic, ppc405-critical, bookE-critical - * and E500 machine-check, synchronous and asynchronous exceptions - */ - PPC_EXC_MIN_PROLOG_SYNC _NAME=tmpl_std _VEC=0 _PRI=std _FLVR=std - PPC_EXC_MIN_PROLOG_SYNC _NAME=tmpl_p405_crit _VEC=0 _PRI=crit _FLVR=p405_crit - PPC_EXC_MIN_PROLOG_SYNC _NAME=tmpl_bookE_crit _VEC=0 _PRI=crit _FLVR=bookE_crit - PPC_EXC_MIN_PROLOG_SYNC _NAME=tmpl_e500_mchk _VEC=0 _PRI=mchk _FLVR=e500_mchk - - PPC_EXC_MIN_PROLOG_ASYNC _NAME=tmpl_std _VEC=0 _PRI=std _FLVR=std - PPC_EXC_MIN_PROLOG_ASYNC _NAME=tmpl_p405_crit _VEC=0 _PRI=crit _FLVR=p405_crit - PPC_EXC_MIN_PROLOG_ASYNC _NAME=tmpl_bookE_crit _VEC=0 _PRI=crit _FLVR=bookE_crit - PPC_EXC_MIN_PROLOG_ASYNC _NAME=tmpl_e500_mchk _VEC=0 _PRI=mchk _FLVR=e500_mchk - - .global ppc_exc_min_prolog_size -ppc_exc_min_prolog_size = 4 * 4 - -/* Special prologue for 603e-style CPUs. - * - * 603e shadows GPR0..GPR3 for certain exceptions. We must switch - * that off before we can use the stack pointer. Note that this is - * ONLY safe if the shadowing is actually active -- otherwise, r1 - * is destroyed. We deliberately use r1 so problems become obvious - * if this is misused! - */ - .global ppc_exc_tgpr_clr_prolog -ppc_exc_tgpr_clr_prolog: - mfmsr r1 - rlwinm r1,r1,0,15,13 - mtmsr r1 - isync - /* FALL THRU TO 'auto' PROLOG */ - -/* Determine vector dynamically/automatically - * - * BUT: - only standard exceptions (no critical ones) - * - vector offset must be on 256 Byte boundary. - */ - .global ppc_exc_min_prolog_auto -ppc_exc_min_prolog_auto: - stwu r1, -EXCEPTION_FRAME_END(r1) - stw VECTOR_REGISTER, VECTOR_OFFSET(r1) - mflr VECTOR_REGISTER - - /* - * We store the absolute branch target address here. It will be used - * to generate the branch operation in ppc_exc_make_prologue(). - * - * We add one to request the link in the generated branch instruction. - */ - .int ppc_exc_wrap_auto + 1 - - .global ppc_exc_tgpr_clr_prolog_size -ppc_exc_tgpr_clr_prolog_size = . - ppc_exc_tgpr_clr_prolog - -/* - * Automatic vector, asynchronous exception; however, - * automatic vector calculation is less efficient than - * using an explicit vector in a minimal prolog snippet. - * The latter method is preferable since there usually - * are few asynchronous exceptions. - * - * For generic exceptions (which are the bulk) using - * the 'auto' prologue is OK since performance is not - * really an issue. - */ - .global ppc_exc_min_prolog_auto_async -ppc_exc_min_prolog_auto_async: - stw r1, ppc_exc_lock_std@sdarel(r13) - stw VECTOR_REGISTER, ppc_exc_vector_register_std@sdarel(r13) - mflr VECTOR_REGISTER - - /* - * We store the absolute branch target address here. It will be used - * to generate the branch operation in ppc_exc_make_prologue(). - * - * We add one to request the link in the generated branch instruction. - */ - .int ppc_exc_wrap_auto_async + 1 - -/******************************************************/ -/* WRAPPERS */ -/******************************************************/ - - /* Tag start and end of the wrappers. - * If exceptions are installed farther removed - * from the text area than 32M then the wrappers - * must be moved to an area that is reachable - * from where the prologues reside. Branches into - * C-code are far. - */ - - .global __ppc_exc_wrappers_start -__ppc_exc_wrappers_start = . - - /* Expand wrappers for different exception flavors */ - - /* Standard/classic powerpc */ - WRAP _FLVR=std _PRI=std _SRR0=srr0 _SRR1=srr1 _RFI=rfi - - /* ppc405 has a critical exception using srr2/srr3 */ - WRAP _FLVR=p405_crit _PRI=crit _SRR0=srr2 _SRR1=srr3 _RFI=rfci - - /* bookE has critical exception using csrr0 cssr1 */ - WRAP _FLVR=bookE_crit _PRI=crit _SRR0=csrr0 _SRR1=csrr1 _RFI=rfci - - /* e500 has machine-check exception using mcsrr0 mcssr1 */ - WRAP _FLVR=e500_mchk _PRI=mchk _SRR0=mcsrr0 _SRR1=mcsrr1 _RFI=rfmci - - /* LR holds vector, VECTOR_REGISTER holds orig. LR */ - .global ppc_exc_wrap_auto -ppc_exc_wrap_auto: - stw FRAME_REGISTER, FRAME_OFFSET(r1) - - /* Find address where we jumped from */ - mflr FRAME_REGISTER - - /* Restore LR */ - mtlr VECTOR_REGISTER - - /* Compute vector into R3 */ - rlwinm VECTOR_REGISTER, FRAME_REGISTER, 24, 26, 31 - - /* - * We're now in almost the same state as if called by - * min_prolog_std but we must skip saving FRAME_REGISTER - * since that's done already - */ - b wrap_no_save_frame_register_std - - .global ppc_exc_wrap_auto_async -ppc_exc_wrap_auto_async: - stwu r1, -EXCEPTION_FRAME_END(r1) - stw FRAME_REGISTER, FRAME_OFFSET(r1) - /* find address where we jumped from */ - mflr FRAME_REGISTER - /* restore LR */ - mtlr VECTOR_REGISTER - /* set upper bits to indicate that non-volatile - * registers should not be saved/restored. - */ - li VECTOR_REGISTER, 0xffff8000 - /* compute vector into R3 */ - rlwimi VECTOR_REGISTER, FRAME_REGISTER, 24, 26, 31 - /* we're now in almost the same state as if called by - * min_prolog_std but we must skip saving FRAME_REGISTER - * since that's done already - */ - b wrap_no_save_frame_register_std - - .global __ppc_exc_wrappers_end -__ppc_exc_wrappers_end = . |