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https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
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05b841174c
Add the source code that is used to generate spu_save_dump.h and spu_restore_dump.h. Since a full spu tool chain is needed to generate these files, the default remains to use the shipped versions in order to keep the number of tools for building the kernel down. Signed-off-by: Arnd Bergmann <arndb@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
116 lines
3.1 KiB
ArmAsm
116 lines
3.1 KiB
ArmAsm
/*
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* crt0_r.S: Entry function for SPU-side context restore.
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*
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* Copyright (C) 2005 IBM
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*
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* Entry and exit function for SPU-side of the context restore
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* sequence. Sets up an initial stack frame, then branches to
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* 'main'. On return, restores all 128 registers from the LSCSA
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* and exits.
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <asm/spu_csa.h>
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.data
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.align 7
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.globl regs_spill
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regs_spill:
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.space SIZEOF_SPU_SPILL_REGS, 0x0
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.text
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.global _start
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_start:
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/* Initialize the stack pointer to point to 16368
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* (16kb-16). The back chain pointer is initialized
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* to NULL.
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*/
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il $0, 0
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il $SP, 16368
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stqd $0, 0($SP)
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/* Allocate a minimum stack frame for the called main.
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* This is needed so that main has a place to save the
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* link register when it calls another function.
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*/
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stqd $SP, -160($SP)
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ai $SP, $SP, -160
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/* Call the program's main function. */
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brsl $0, main
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.global exit
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.global _exit
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exit:
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_exit:
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/* SPU Context Restore, Step 5: Restore the remaining 112 GPRs. */
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ila $3, regs_spill + 256
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restore_regs:
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lqr $4, restore_reg_insts
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restore_reg_loop:
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ai $4, $4, 4
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.balignl 16, 0x40200000
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restore_reg_insts: /* must be quad-word aligned. */
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lqd $16, 0($3)
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lqd $17, 16($3)
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lqd $18, 32($3)
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lqd $19, 48($3)
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andi $5, $4, 0x7F
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stqr $4, restore_reg_insts
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ai $3, $3, 64
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brnz $5, restore_reg_loop
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/* SPU Context Restore Step 17: Restore the first 16 GPRs. */
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lqa $0, regs_spill + 0
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lqa $1, regs_spill + 16
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lqa $2, regs_spill + 32
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lqa $3, regs_spill + 48
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lqa $4, regs_spill + 64
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lqa $5, regs_spill + 80
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lqa $6, regs_spill + 96
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lqa $7, regs_spill + 112
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lqa $8, regs_spill + 128
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lqa $9, regs_spill + 144
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lqa $10, regs_spill + 160
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lqa $11, regs_spill + 176
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lqa $12, regs_spill + 192
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lqa $13, regs_spill + 208
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lqa $14, regs_spill + 224
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lqa $15, regs_spill + 240
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/* Under normal circumstances, the 'exit' function
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* terminates with 'stop SPU_RESTORE_COMPLETE',
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* indicating that the SPU-side restore code has
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* completed.
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*
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* However it is possible that instructions immediately
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* following the 'stop 0x3ffc' have been modified at run
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* time so as to recreate the exact SPU_Status settings
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* from the application, e.g. illegal instruciton, halt,
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* etc.
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*/
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.global exit_fini
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.global _exit_fini
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exit_fini:
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_exit_fini:
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stop SPU_RESTORE_COMPLETE
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stop 0
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stop 0
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stop 0
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/* Pad the size of this crt0.o to be multiple of 16 bytes. */
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.balignl 16, 0x0
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