diff options
Diffstat (limited to 'newlib/libc/machine/spu/spu_timer_flih.S')
| -rw-r--r-- | newlib/libc/machine/spu/spu_timer_flih.S | 152 |
1 files changed, 0 insertions, 152 deletions
diff --git a/newlib/libc/machine/spu/spu_timer_flih.S b/newlib/libc/machine/spu/spu_timer_flih.S deleted file mode 100644 index 63f5f074c..000000000 --- a/newlib/libc/machine/spu/spu_timer_flih.S +++ /dev/null @@ -1,152 +0,0 @@ -/* -(C) Copyright IBM Corp. 2008 - -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 IBM 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 OWNER 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. -*/ - -/* First-level interrupt handler. */ - -/* The following two convenience macros assist in the coding of the - saving and restoring the volatile register starting from register - 2 up to register 79. - - saveregs first, last Saves registers from first to the last. - restoreregs first, last Restores registers from last down to first. - - Note: first must be less than or equal to last. */ - -.macro saveregs first, last - stqd $\first, -(STACK_SKIP+\first)*16($SP) -.if \last-\first - saveregs "(\first+1)",\last -.endif -.endm - - -.macro restoreregs first, last - lqd $\last, (82-\last)*16($SP) -.if \last-\first - restoreregs \first,"(\last-1)" -.endif -.endm - - .section .interrupt,"ax" - .align 3 - .type spu_flih, @function -spu_flih: - /* Adjust the stack pointer to skip the maximum register save area - (STACK_SKIP quadword registers) in case an interrupt occurred while - executing a leaf function that used the stack area without actually - allocating its own stack frame. */ - .set STACK_SKIP, 125 - - /* Save the current link register on a new stack frame for the - normal spu_flih() version of this file. */ - stqd $0, -(STACK_SKIP+80)*16($SP) - stqd $SP, -(STACK_SKIP+82)*16($SP) /* Save back chain pointer. */ - - saveregs 2, 39 - - il $2, -(STACK_SKIP+82)*16 /* Stack frame size. */ - rdch $3, $SPU_RdEventStat /* Read event status. */ - - rdch $6, $SPU_RdEventMask /* Read event mask. */ - hbrp /* Open a slot for instruction prefetch. */ - - saveregs 40,59 - - clz $4, $3 /* Get first slih index. */ - stqd $6, -(STACK_SKIP+1)*16($SP) /* Save event mask on stack. */ - - saveregs 60, 67 - - /* Do not disable/ack the decrementer event here. - The timer library manages this and expects it - to be enabled upon entry to the SLIH. */ - il $7, 0x20 - andc $5, $3, $7 - andc $7, $6, $5 /* Clear event bits. */ - saveregs 68, 69 - - wrch $SPU_WrEventAck, $3 /* Ack events(s) - include decrementer event. */ - wrch $SPU_WrEventMask, $7 /* Disable event(s) - exclude decrementer event. */ - - saveregs 70, 79 - - a $SP, $SP, $2 /* Instantiate flih stack frame. */ -next_event: - /* Fetch and dispatch the event handler for the first non-zero event. The - dispatch handler is indexed into the __spu_slih_handlers array using the - count of zero off the event status as an index. */ - ila $5, __spu_slih_handlers /* Slih array offset. */ - - shli $4, $4, 2 /* Slih entry offset. */ - lqx $5, $4, $5 /* Load slih address. */ - rotqby $5, $5, $4 /* Rotate to word 0. */ - bisl $0, $5 /* Branch to slih. */ - - clz $4, $3 /* Get next slih index. */ - brnz $3, next_event - - - lqd $2, 81*16($SP) /* Read event mask from stack. */ - - restoreregs 40, 79 - - wrch $SPU_WrEventMask, $2 /* Restore event mask. */ - hbrp /* Open a slot for instruction pre-fetch. */ - - restoreregs 2, 39 - - /* Restore the link register from the new stack frame for the - normal spu_flih() version of this file. */ - lqd $0, 2*16($SP) - - lqd $SP, 0*16($SP) /* restore stack pointer from back chain ptr. */ - - irete /* Return from interrupt and re-enable interrupts. */ - .size spu_flih, .-spu_flih -/* spu_slih_handlers[] - Here we initialize 33 default event handlers. The first entry in this array - corresponds to the event handler for the event associated with bit 0 of - Channel 0 (External Event Status). The 32nd entry in this array corresponds - to bit 31 of Channel 0 (DMA Tag Status Update Event). The 33rd entry in - this array is a special case entry to handle "phantom events" which occur - when the channel count for Channel 0 is 1, causing an asynchronous SPU - interrupt, but the value returned for a read of Channel 0 is 0. The index - calculated into this array by spu_flih() for this case is 32, hence the - 33rd entry. */ -.data - .align 4 - .extern __spu_default_slih - .global __spu_slih_handlers - .type __spu_slih_handlers, @object -__spu_slih_handlers: - .rept 33 - .long __spu_default_slih - .endr - .size __spu_slih_handlers, .-__spu_slih_handlers |