diff options
Diffstat (limited to 'libgloss/sparc_leon/rtrap_fast.S')
| -rw-r--r-- | libgloss/sparc_leon/rtrap_fast.S | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/libgloss/sparc_leon/rtrap_fast.S b/libgloss/sparc_leon/rtrap_fast.S deleted file mode 100644 index 1aef5263c..000000000 --- a/libgloss/sparc_leon/rtrap_fast.S +++ /dev/null @@ -1,158 +0,0 @@ -/* - * Copyright (c) 2011 Aeroflex Gaisler - * - * BSD license: - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ - - -#include <asm-leon/leonstack.h> -#include <asm-leon/winmacros.h> - -/* Registers to not touch at all. */ -#define t_psr l0 -#define t_pc l1 -#define t_npc l2 -#define t_wim l3 -#define twin_tmp1 l4 -#define glob_tmp g4 -#define curptr g6 - - /* Number of register windows */ - .global _nwindows_min1, _nwindows - - .text - .align 4 - .globl leonbare_trapreturn_fast, schedule_callback - - -/* rtap return special for irqtrap.S */ -leonbare_trapreturn_fast: - - /* a optional scheduler can be called here */ - set schedule_callback, %g2 - ld [%g2], %g2 - cmp %g2,%g0 - beq 3f - nop - - jmpl %g2,%o7 -#ifndef _SOFT_FLOAT - add %sp, FW_REGS_SZ + 8 + SF_REGS_SZ , %o1 ! pt_regs ptr -#else - add %sp, SF_REGS_SZ , %o1 ! pt_regs ptr -#endif - -3: - -#ifndef _SOFT_FLOAT - ld [%sp + (SF_REGS_SZ + PT_REGS_SZ + FW_REGS_SZ - 4)],%g2 - sethi %hi(fpustate_current), %g3 - st %g2, [%g3+%lo(fpustate_current)] - sethi %hi(fpustate_owner), %g3 - ld [%g3+%lo(fpustate_owner)], %g3 - cmp %g2, %g3 - bne didusefpu - nop - - /* avoid fpu exception */ - ld [%sp + (SF_REGS_SZ + PT_REGS_SZ + FW_REGS_SZ - 8)], %g2 - set SPARC_PSR_EF_MASK, %g3 - and %g2, %g3, %g2 - andn %t_psr, %g3, %t_psr - or %t_psr, %g2, %t_psr - ba,a 1f - -didusefpu: - add %sp,SF_REGS_SZ + PT_REGS_SZ,%g2 - cmp %g2, %g3 - bne 1f - - sethi %hi(fpustate_owner), %g3 - st %g0, [%g3+%lo(fpustate_owner)] - -1: -#endif - - wr %t_psr, 0x0, %psr ! enable nesting again, clear ET - -#ifndef _FLAT - /* Will the rett land us in the invalid window? */ - mov 2, %g1 - sll %g1, %t_psr, %g1 - - sethi %hi(_nwindows), %g2 !NWINDOWS - ld [%g2+%lo(_nwindows)], %g2 - - srl %g1, %g2, %g2 - or %g1, %g2, %g1 - rd %wim, %g2 - andcc %g2, %g1, %g0 - be 1f ! Nope, just return from the trap - sll %g2, 0x1, %g1 - - /* We have to grab a window before returning. */ - sethi %hi(_nwindows_min1), %g3 !NWINDOWS-1 - ld [%g3+%lo(_nwindows_min1)], %g3 - - srl %g2, %g3, %g2 - or %g1, %g2, %g1 - and %g1, 0xff, %g1 - - wr %g1, 0x0, %wim - - /* Grrr, make sure we load from the right %sp... */ - PT_LOAD_ALL_FAST(sp, t_psr, t_pc, t_npc, g1) - - restore %g0, %g0, %g0 - RW_LOAD(sp) - b 2f - save %g0, %g0, %g0 - - /* Reload the entire frame in case this is from a - * kernel system call or whatever... - */ -1: -#endif - PT_LOAD_ALL_FAST(sp, t_psr, t_pc, t_npc, g1) - -2: /*PT_LOAD_GLOBALS(sp)*/ - -#ifdef _FLAT - restore - RW_LOAD(sp) - save -#endif - - wr %t_psr, 0x0, %psr - nop; nop; nop - - jmp %t_pc - rett %t_npc - - - - - -#ifdef _FLAT -#warning _FLAT not implemented -#endif - - |