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Diffstat (limited to 'libgloss/or1k/exceptions-asm.S')
-rw-r--r-- | libgloss/or1k/exceptions-asm.S | 201 |
1 files changed, 0 insertions, 201 deletions
diff --git a/libgloss/or1k/exceptions-asm.S b/libgloss/or1k/exceptions-asm.S deleted file mode 100644 index 7248683f5..000000000 --- a/libgloss/or1k/exceptions-asm.S +++ /dev/null @@ -1,201 +0,0 @@ -/* exceptions-asm.S -- exception handling for OpenRISC 1000. - * - * Copyright (c) 2011, 2014 Authors - * - * Contributor Julius Baxter <juliusbaxter@gmail.com> - * Contributor Stefan Wallentowitz <stefan.wallentowitz@tum.de> - * - * The authors hereby grant permission to use, copy, modify, distribute, - * and license this software and its documentation for any purpose, provided - * that existing copyright notices are retained in all copies and that this - * notice is included verbatim in any distributions. No written agreement, - * license, or royalty fee is required for any of the authorized uses. - * Modifications to this software may be copyrighted by their authors - * and need not follow the licensing terms described here, provided that - * the new terms are clearly indicated on the first page of each file where - * they apply. - */ - -#include "include/or1k-asm.h" -#include "include/or1k-sprs.h" - -/* -------------------------------------------------------------------------- */ -/*!Generic exception handler function - */ -/* -------------------------------------------------------------------------- */ -// Warning - this must be the same as specified in crt0.S -#define EXCEPTION_STACK_SIZE 128+128 - - .extern _or1k_exception_handler_table - -/* -------------------------------------------------------------------------- */ -/*!Function to call appropriate exception handler - */ -/* -------------------------------------------------------------------------- */ - .section .text - .global _or1k_exception_handler - .type _or1k_exception_handler,@function - - /* - r3 = address of exception vector - r4 = address where exception occurred - */ - -#define GPR_BUF_OFFSET(x) (x << 2) - -_or1k_exception_handler: - /* Store remainder of state (r3,r4 stored in vector entry)*/ - l.sw GPR_BUF_OFFSET(2)(r1),r2 - l.sw GPR_BUF_OFFSET(5)(r1),r5 - l.sw GPR_BUF_OFFSET(6)(r1),r6 - l.sw GPR_BUF_OFFSET(7)(r1),r7 - l.sw GPR_BUF_OFFSET(8)(r1),r8 - l.sw GPR_BUF_OFFSET(9)(r1),r9 - l.sw GPR_BUF_OFFSET(10)(r1),r10 - l.sw GPR_BUF_OFFSET(11)(r1),r11 - l.sw GPR_BUF_OFFSET(12)(r1),r12 - l.sw GPR_BUF_OFFSET(13)(r1),r13 - l.sw GPR_BUF_OFFSET(14)(r1),r14 - l.sw GPR_BUF_OFFSET(15)(r1),r15 - l.sw GPR_BUF_OFFSET(16)(r1),r16 - l.sw GPR_BUF_OFFSET(17)(r1),r17 - l.sw GPR_BUF_OFFSET(18)(r1),r18 - l.sw GPR_BUF_OFFSET(19)(r1),r19 - l.sw GPR_BUF_OFFSET(20)(r1),r20 - l.sw GPR_BUF_OFFSET(21)(r1),r21 - l.sw GPR_BUF_OFFSET(22)(r1),r22 - l.sw GPR_BUF_OFFSET(23)(r1),r23 - l.sw GPR_BUF_OFFSET(24)(r1),r24 - l.sw GPR_BUF_OFFSET(25)(r1),r25 - l.sw GPR_BUF_OFFSET(26)(r1),r26 - l.sw GPR_BUF_OFFSET(27)(r1),r27 - l.sw GPR_BUF_OFFSET(28)(r1),r28 - l.sw GPR_BUF_OFFSET(29)(r1),r29 - l.sw GPR_BUF_OFFSET(30)(r1),r30 - l.sw GPR_BUF_OFFSET(31)(r1),r31 - - /* Replace impure pointer for exception */ - l.movhi r20,hi(_or1k_exception_impure_ptr) - l.ori r20,r20,lo(_or1k_exception_impure_ptr) -#ifdef __OR1K_MULTICORE__ - l.lwz r20,0(r20) - l.mfspr r22,r0,OR1K_SPR_SYS_COREID_ADDR - l.slli r22,r22,2 - l.add r20,r20,r22 -#endif - l.lwz r20,0(r20) - - l.movhi r21,hi(_or1k_current_impure_ptr) - l.ori r21,r21,lo(_or1k_current_impure_ptr) -#ifdef __OR1K_MULTICORE__ - l.lwz r21,0(r21) - l.add r21,r21,r22 -#endif - l.sw 0(r21),r20 - - /* Determine offset in table of exception handler using r3*/ - l.andi r13,r3,0xff00 - l.srli r13,r13,6 - /* Substract 2 words, as we have no vector at 0 and no reset handler */ - l.addi r13,r13,-8 - /* r13 now contains offset in or1k_exception_handler_table for - function - */ - /* Get or1k_exception_handler_table address */ - l.movhi r14,hi(_or1k_exception_handler_table) - l.ori r14,r14,lo(_or1k_exception_handler_table) -#ifdef __OR1K_MULTICORE__ - /* Read the address of the array of cores */ - /* r14 = (*or1k_exception_handler_table) */ - l.lwz r14,0(r14) - /* Generate core offset in array (off = coreid*30*4 = coreid*120) */ - /* r15 = coreid */ - l.mfspr r15,r0,OR1K_SPR_SYS_COREID_ADDR - /* r16 = coreid * 128 */ - l.slli r16,r15,7 - /* r15 = coreid * 8 */ - l.slli r15,r15,3 - /* r15 = coreid*128 - coreid*8 = coreid*120 = off */ - l.sub r15,r16,r15 - /* r14 = (*or1k_exception_handler_table)[coreid] = r14 + off */ - l.add r14,r14,r15 -#endif - /* r14 now contains base of exception handler table */ - /* add offset of exception vector */ - l.add r14,r14,r13 - /* load handler address from table */ - l.lwz r13, 0(r14) - - /* Check to see if this handler has been set yet */ - l.sfne r13,r0 - OR1K_DELAYED_NOP(OR1K_INST(l.bnf exception_exit)) - - /* Call exception handler, copy EPCR to r3 */ - OR1K_DELAYED( - OR1K_INST(l.or r3,r4,r4), - OR1K_INST(l.jalr r13) - ) - - /* Restore impure pointer */ - l.movhi r20,hi(_or1k_impure_ptr) - l.ori r20,r20,lo(_or1k_impure_ptr) -#ifdef __OR1K_MULTICORE__ - l.lwz r20,0(r20) - l.mfspr r22,r0,OR1K_SPR_SYS_COREID_ADDR - l.slli r22,r22,2 - l.add r20,r20,r22 -#endif - l.lwz r20,0(r20) - - l.movhi r21,hi(_or1k_current_impure_ptr) - l.ori r21,r21,lo(_or1k_current_impure_ptr) -#ifdef __OR1K_MULTICORE__ - l.lwz r21,0(r21) - l.add r21,r21,r22 -#endif - l.sw 0(r21),r20 - - /* Restore state */ - l.lwz r2,GPR_BUF_OFFSET(2)(r1) - l.lwz r3,GPR_BUF_OFFSET(3)(r1) - l.lwz r4,GPR_BUF_OFFSET(4)(r1) - l.lwz r5,GPR_BUF_OFFSET(5)(r1) - l.lwz r6,GPR_BUF_OFFSET(6)(r1) - l.lwz r7,GPR_BUF_OFFSET(7)(r1) - l.lwz r8,GPR_BUF_OFFSET(8)(r1) - l.lwz r9,GPR_BUF_OFFSET(9)(r1) - l.lwz r10,GPR_BUF_OFFSET(10)(r1) - l.lwz r11,GPR_BUF_OFFSET(11)(r1) - l.lwz r12,GPR_BUF_OFFSET(12)(r1) - l.lwz r13,GPR_BUF_OFFSET(13)(r1) - l.lwz r14,GPR_BUF_OFFSET(14)(r1) - l.lwz r15,GPR_BUF_OFFSET(15)(r1) - l.lwz r16,GPR_BUF_OFFSET(16)(r1) - l.lwz r17,GPR_BUF_OFFSET(17)(r1) - l.lwz r18,GPR_BUF_OFFSET(18)(r1) - l.lwz r19,GPR_BUF_OFFSET(19)(r1) - l.lwz r20,GPR_BUF_OFFSET(20)(r1) - l.lwz r21,GPR_BUF_OFFSET(21)(r1) - l.lwz r22,GPR_BUF_OFFSET(22)(r1) - l.lwz r23,GPR_BUF_OFFSET(23)(r1) - l.lwz r24,GPR_BUF_OFFSET(24)(r1) - l.lwz r25,GPR_BUF_OFFSET(25)(r1) - l.lwz r26,GPR_BUF_OFFSET(26)(r1) - l.lwz r27,GPR_BUF_OFFSET(27)(r1) - l.lwz r28,GPR_BUF_OFFSET(28)(r1) - l.lwz r29,GPR_BUF_OFFSET(29)(r1) - l.lwz r30,GPR_BUF_OFFSET(30)(r1) - l.lwz r31,GPR_BUF_OFFSET(31)(r1) - - // Restore original stack - l.lwz r1,GPR_BUF_OFFSET(1)(r1) - - l.rfe - l.nop - -exception_exit: - /* Exception handler not set, exit */ - OR1K_DELAYED( - OR1K_INST(l.or r3,r4,r4), - OR1K_INST(l.jal exit) - ) |