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Diffstat (limited to 'libgloss/epiphany/epiphany-ivthandlers.S')
| -rw-r--r-- | libgloss/epiphany/epiphany-ivthandlers.S | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/libgloss/epiphany/epiphany-ivthandlers.S b/libgloss/epiphany/epiphany-ivthandlers.S deleted file mode 100644 index 0731a6b06..000000000 --- a/libgloss/epiphany/epiphany-ivthandlers.S +++ /dev/null @@ -1,192 +0,0 @@ -# EPIPHANY implementation of wrappers over user C ISR () - -# Copyright (c) 2011, Adapteva, Inc. -# All rights reserved. - -# Redistribution and use in source and binary forms, with or without -# modification, are permitted provided that the following conditions are met: -# * Redistributions of source code must retain the above copyright notice, -# this list of conditions and the following disclaimer. -# * Redistributions in binary form must reproduce the above copyright -# notice, this list of conditions and the following disclaimer in the -# documentation and/or other materials provided with the distribution. -# * Neither the name of Adapteva nor the names of its contributors may be -# used to endorse or promote products derived from this software without -# specific prior written permission. - -# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" -# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE -# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR -# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF -# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS -# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN -# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) -# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -# POSSIBILITY OF SUCH DAMAGE. - -.section RESERVED_CRT0,"a",@progbits ; -.set sw_exception_v_n, 1 -.set page_miss_v_n, 2 -.set timer0_expired_v_n, 3; -.set timer1_expired_v_n, 4; -.set message_v_n, 5; -.set dma0_v_n, 6; -.set dma1_v_n, 7; -.set wand_v_n, 8; -.set soft_v_n, 9 - -// preserve isr-mods to ACTIVE, GID, KERNEL, WAND, & EXCAUSE bits in the status reg -.set status_mask, 0x0007000f; -// for the wand isr, preserve isr-mods to ACTIVE, GID, KERNEL, & EXCAUSE, but -// clear the WAND bit. -.set wand_status_mask, 0x00070007; - -//IVT wrappers - -.global _DEFAULT_ISR_CALLBACK; -.balign 4 -.type _DEFAULT_ISR_CALLBACK, %function -_DEFAULT_ISR_CALLBACK: - rts -.size _DEFAULT_ISR_CALLBACK, .-_DEFAULT_ISR_CALLBACK - - -.global _DEFAULT_ISR_CALLBACK_FOR_sw_exception_v; -.balign 4 -.type _DEFAULT_ISR_CALLBACK_FOR_sw_exception_v, %function -_DEFAULT_ISR_CALLBACK_FOR_sw_exception_v: - trap 5;; FAIL -.size _DEFAULT_ISR_CALLBACK_FOR_sw_exception_v, .-_DEFAULT_ISR_CALLBACK_FOR_sw_exception_v - - -.set NUMBER_ENTRIES_IN_IVT, 8 -.global _ISR_VECTOR; -.balign 4 -.type _ISR_VECTOR, %object -_ISR_VECTOR: - .word _DEFAULT_ISR_CALLBACK_FOR_sw_exception_v; reset - .word _DEFAULT_ISR_CALLBACK_FOR_sw_exception_v; sw_exception - .word _DEFAULT_ISR_CALLBACK_FOR_sw_exception_v; page_miss - .rept NUMBER_ENTRIES_IN_IVT - .word _DEFAULT_ISR_CALLBACK - .endr -.size _ISR_VECTOR, .-_ISR_VECTOR - -.macro IVT_ENTRY_CALL entry_v_ - ;; assuming we have valid frame poiter - - str fp, [sp],-0x10 - str r0, [sp,+0xf] - str r1, [sp,+0xe] - mov r0, \entry_v_ -.if \entry_v_ == wand_v_n - mov r1, %low(wand_status_mask) ; this mask will exclude WAND, so it will - movt r1, %high(wand_status_mask) ; be forcibly cleared -.else - mov r1, %low(status_mask) - movt r1, %high(status_mask) -.endif - str r1, [sp,0x9] ; save the status register isr-preserve mask on the stack - b __dispatcher -.endm - -.global __dispatcher; -.balign 4 -.type __dispatcher, %function -__dispatcher: - str lr, [sp,+0xd] - movfs.l r1,status - str r1, [sp,+0xc] - movfs.l r1,iret - str r1, [sp,+0xb] - str r2, [sp,+0xa] - str r3, [sp,+0x8] - - mov fp,sp - - //TODO allow nesting - //gie - - lsl r2, r0, 2 - mov r1, %low(_ISR_VECTOR) - add r2, r2, r1 - ldr r1, [r2,0] ;; r1 = _ISR_VECTOR[entry_v] - mov r2, 3 - add r0, r0, r2 ;; r0 = signum - jalr r1 - - mov sp,fp - - //gid - - // preserve isr-modifications to some of the bits in the status register, - // but restore the rest to pre-interrupt values. - // status = (status[post_isr] & status_mask) | (status[pre_isr] & ~status_mask) - - ldr.l r2, [sp, 9] ; fetch the status register isr preserve mask from the stack - movfs r1, status - and r1, r1, r2; (status[post_isr] & status_mask) - - ldr r0, [sp,+0xc] - mov r2, %low(~status_mask) - movt r2, %high(~status_mask) - and r0, r0, r2; (status[pre_isr] & ~status_mask) - - orr r0, r0, r1 ; combine pre_isr & post_isr status bits - movts.l status, r0 - - ldr r0, [sp,+0xb] - movts.l iret,r0 - - ldr lr,[sp,+0xd]; - ldr r1,[sp,+0xe] - ldr r0,[sp,+0xf] - ldr r2,[sp,+0xa] - ldr r3,[sp,+0x8] - ldr fp,[sp],+0x10 - ldr fp,[sp,0] - rti -.size __dispatcher, .-__dispatcher - - -.global .sw_exception_v; -.type .sw_exception_v, %function -.sw_exception_v: - IVT_ENTRY_CALL sw_exception_v_n; -.size .sw_exception_v, .-.sw_exception_v - -.global .page_miss_v; -.type .page_miss_v, %function -.page_miss_v: - IVT_ENTRY_CALL page_miss_v_n; -.size .page_miss_v, .-.page_miss_v - -.global .timer0_expired_v; -.timer0_expired_v: - IVT_ENTRY_CALL timer0_expired_v_n; - -.global .timer1_expired_v; -.timer1_expired_v: - IVT_ENTRY_CALL timer1_expired_v_n; - -.global .message_v; -.message_v: - IVT_ENTRY_CALL message_v_n; - -.global .dma0_v; -.dma0_v: - IVT_ENTRY_CALL dma0_v_n; - -.global .dma1_v; -.dma1_v: - IVT_ENTRY_CALL dma1_v_n; - -.global .wand_v; -.wand_v: - IVT_ENTRY_CALL wand_v_n; - -.global .soft_v; -.soft_v: - IVT_ENTRY_CALL soft_v_n; |